2AXT | pdb_00002axt

Crystal Structure of Photosystem II from Thermosynechococcus elongatus

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
I [auth J]	d2axtj1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein J, PsbJ	PsbJ-like	Photosystem II reaction center protein J, PsbJ	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
H [auth I]	d2axti1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein I, PsbI	PsbI-like	Photosystem II reaction center protein I, PsbI	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
G [auth H]	d2axth1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II 10 kDa phosphoprotein PsbH	PsbH-like	Photosystem II reaction center protein H, PsbH	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
F	d2axtf1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Cytochrome b559 subunits	Cytochrome b559 subunits	Cytochrome b559 subunit beta, PsbF	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
E	d2axte1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Cytochrome b559 subunits	Cytochrome b559 subunits	Cytochrome b559 subunit alpha, PsbE	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
D	d2axtd1	Membrane and cell surface proteins and peptides	Bacterial photosystem II reaction centre, L and M subunits	Bacterial photosystem II reaction centre, L and M subunits	Bacterial photosystem II reaction centre, L and M subunits	Photosystem II reaction center d2 protein PsbD2	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
C	d2axtc1	Membrane and cell surface proteins and peptides	Photosystem II antenna protein-like	Photosystem II antenna protein-like	Photosystem II antenna protein-like	Photosystem II CP43 protein PsbC	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
B	d2axtb1	Membrane and cell surface proteins and peptides	Photosystem II antenna protein-like	Photosystem II antenna protein-like	Photosystem II antenna protein-like	Photosystem II core light harvesting protein PsbB	(Thermosynechococcus vestitus BP-1 ) [TaxId: 197221 ],	SCOPe (2.08)
R [auth Z]	d2axtz1	Membrane and cell surface proteins and peptides	Transmembrane helix hairpin	PsbZ-like	PsbZ-like	Photosystem II reaction center protein Z, PsbZ	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
P [auth V]	d2axtv_	All alpha proteins	Cytochrome c	Cytochrome c	monodomain cytochrome c	automated matches	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
O [auth U]	d2axtu1	All alpha proteins	SAM domain-like	PsbU/PolX domain-like	PsbU-like	Photosystem II 12 kDa extrinsic protein PsbU	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
N [auth T]	d2axtt1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein T, PsbT	PsbT-like	Photosystem II reaction center protein T, PsbT	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
M [auth O]	d2axto1	Membrane and cell surface proteins and peptides	Transmembrane beta-barrels	OMPA-like	PsbO-like	Manganese-stabilising protein, PsbO	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
L [auth M]	d2axtm1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein M, PsbM	PsbM-like	Photosystem II reaction center protein M, PsbM	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
K [auth L]	d2axtl1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein L, PsbL	PsbL-like	Photosystem II reaction center protein L, PsbL	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
J [auth K]	d2axtk1	Membrane and cell surface proteins and peptides	Single transmembrane helix	Photosystem II reaction center protein K, PsbK	PsbK-like	Photosystem II reaction center protein K, PsbK	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)
A	d2axta1	Membrane and cell surface proteins and peptides	Bacterial photosystem II reaction centre, L and M subunits	Bacterial photosystem II reaction centre, L and M subunits	Bacterial photosystem II reaction centre, L and M subunits	Photosystem Q(B) protein 1, PsbA1	(Thermosynechococcus vestitus ) [TaxId: 146786 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
I [auth J]	SCOP2 Family	PsbJ-like	8020375	4002642	SCOP2 (2022-06-29)
I [auth J]	SCOP2 Superfamily	Photosystem II reaction center protein J, PsbJ	8032755	3001534	SCOP2 (2022-06-29)
AA [auth j]	SCOP2B Superfamily	Photosystem II reaction center protein J, PsbJ	8032755	3001534	SCOP2B (2022-06-29)
Z [auth i]	SCOP2B Superfamily	Photosystem II reaction center protein I, PsbI	8032754	3001590	SCOP2B (2022-06-29)
H [auth I]	SCOP2 Family	PsbI-like	8020374	4002676	SCOP2 (2022-06-29)
H [auth I]	SCOP2 Superfamily	Photosystem II reaction center protein I, PsbI	8032754	3001590	SCOP2 (2022-06-29)
Y [auth h]	SCOP2B Superfamily	Photosystem II 10 kDa phosphoprotein PsbH	8032753	3001547	SCOP2B (2022-06-29)
G [auth H]	SCOP2 Family	PsbH-like	8020373	4002649	SCOP2 (2022-06-29)
G [auth H]	SCOP2 Superfamily	Photosystem II 10 kDa phosphoprotein PsbH	8032753	3001547	SCOP2 (2022-06-29)
X [auth f]	SCOP2B Superfamily	Cytochrome b559 subunits	8032752	3001602	SCOP2B (2022-06-29)
F	SCOP2 Family	Cytochrome b559 subunits	8020372	4002681	SCOP2 (2022-06-29)
F	SCOP2 Superfamily	Cytochrome b559 subunits	8032752	3001602	SCOP2 (2022-06-29)
W [auth e]	SCOP2B Superfamily	Cytochrome b559 subunits	8032749	3001602	SCOP2B (2022-06-29)
E	SCOP2 Family	Cytochrome b559 subunits	8020369	4002681	SCOP2 (2022-06-29)
E	SCOP2 Superfamily	Cytochrome b559 subunits	8032749	3001602	SCOP2 (2022-06-29)
V [auth d]	SCOP2B Superfamily	Bacterial photosystem II reaction centre, L and M subunits	8032750	3000736	SCOP2B (2022-06-29)
D	SCOP2 Family	Bacterial photosystem II reaction centre, L and M subunits	8020370	4002035	SCOP2 (2022-06-29)
D	SCOP2 Superfamily	Bacterial photosystem II reaction centre, L and M subunits	8032750	3000736	SCOP2 (2022-06-29)
U [auth c]	SCOP2B Superfamily	Photosystem II antenna protein-like	8032746	3001674	SCOP2B (2022-06-29)
C	SCOP2 Family	Photosystem II antenna protein-like	8020366	4002735	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Photosystem II antenna protein-like	8032746	3001674	SCOP2 (2022-06-29)
T [auth b]	SCOP2B Superfamily	Photosystem II antenna protein-like	8032743	3001674	SCOP2B (2022-06-29)
B	SCOP2 Family	Photosystem II antenna protein-like	8020363	4002735	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Photosystem II antenna protein-like	8032743	3001674	SCOP2 (2022-06-29)
R [auth Z]	SCOP2 Family	PsbZ-like	8020390	4002701	SCOP2 (2022-06-29)
R [auth Z]	SCOP2 Superfamily	PsbZ-like	8032770	3001624	SCOP2 (2022-06-29)
JA [auth z]	SCOP2B Superfamily	PsbZ-like	8032770	3001624	SCOP2B (2022-06-29)
P [auth V]	SCOP2B Superfamily	Cytochrome c	8036565	3000815	SCOP2B (2022-06-29)
HA [auth v]	SCOP2B Superfamily	Cytochrome c	8036565	3000815	SCOP2B (2022-06-29)
O [auth U]	SCOP2 Family	PsbU-like	8020388	4001403	SCOP2 (2022-06-29)
O [auth U]	SCOP2 Superfamily	PsbU/PolX domain-like	8032768	3000893	SCOP2 (2022-06-29)
GA [auth u]	SCOP2B Superfamily	PsbU/PolX domain-like	8032768	3000893	SCOP2B (2022-06-29)
N [auth T]	SCOP2 Family	PsbT-like	8020389	4002656	SCOP2 (2022-06-29)
N [auth T]	SCOP2 Superfamily	Photosystem II reaction center protein T, PsbT	8032769	3001561	SCOP2 (2022-06-29)
FA [auth t]	SCOP2B Superfamily	Photosystem II reaction center protein T, PsbT	8032769	3001561	SCOP2B (2022-06-29)
M [auth O]	SCOP2 Family	PsbO-like	8020385	4002770	SCOP2 (2022-06-29)
M [auth O]	SCOP2 Superfamily	OMPA barrel-like	8032765	3000208	SCOP2 (2022-06-29)
EA [auth o]	SCOP2B Superfamily	OMPA barrel-like	8032765	3000208	SCOP2B (2022-06-29)
L [auth M]	SCOP2 Family	PsbM-like	8020382	4002664	SCOP2 (2022-06-29)
L [auth M]	SCOP2 Superfamily	Photosystem II reaction center protein M, PsbM	8032762	3001573	SCOP2 (2022-06-29)
DA [auth m]	SCOP2B Superfamily	Photosystem II reaction center protein M, PsbM	8032762	3001573	SCOP2B (2022-06-29)
K [auth L]	SCOP2 Family	PsbL-like	8020379	4002634	SCOP2 (2022-06-29)
K [auth L]	SCOP2 Superfamily	Photosystem II reaction center protein L, PsbL	8032759	3001523	SCOP2 (2022-06-29)
CA [auth l]	SCOP2B Superfamily	Photosystem II reaction center protein L, PsbL	8032759	3001523	SCOP2B (2022-06-29)
J [auth K]	SCOP2 Family	PsbK-like	8020377	4002673	SCOP2 (2022-06-29)
J [auth K]	SCOP2 Superfamily	Photosystem II reaction center protein K, PsbK	8032757	3001585	SCOP2 (2022-06-29)
BA [auth k]	SCOP2B Superfamily	Photosystem II reaction center protein K, PsbK	8032757	3001585	SCOP2B (2022-06-29)
S [auth a]	SCOP2B Superfamily	Bacterial photosystem II reaction centre, L and M subunits	8032741	3000736	SCOP2B (2022-06-29)
A	SCOP2 Family	Bacterial photosystem II reaction centre, L and M subunits	8020361	4002035	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Bacterial photosystem II reaction centre, L and M subunits	8032741	3000736	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
I [auth J]	e2axtJ1	A: Photosystem II reaction center protein J, PsbJ	X: Photosystem II reaction center protein J, PsbJ	H: Photosystem II reaction center protein J, PsbJ	T: PsbJ	F:	ECOD (20:10:01)
AA [auth j]	e2axtj1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
Z [auth i]	e2axti1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
H [auth I]	e2axtI1	A: Photosystem II reaction center protein I, PsbI	X: Photosystem II reaction center protein I, PsbI	H: Photosystem II reaction center protein I, PsbI	T: PsbI	F:	ECOD (20:10:01)
Y [auth h]	e2axth1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
G [auth H]	e2axtH1	A: Photosystem II 10 kDa phosphoprotein PsbH	X: Photosystem II 10 kDa phosphoprotein PsbH	H: Photosystem II 10 kDa phosphoprotein PsbH	T: PsbH	F:	ECOD (20:10:01)
X [auth f]	e2axtf1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
F	e2axtF1	A: Cytochrome b559 subunits	X: Cytochrome b559 subunits	H: Cytochrome b559 subunits	T: Cytochrom_B559	F:	ECOD (20:10:01)
W [auth e]	e2axte1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
E	e2axtE1	A: Cytochrome b559 subunits	X: Cytochrome b559 subunits	H: Cytochrome b559 subunits	T: Cytochrom_B559,Cytochrom_B559a	F:	ECOD (20:10:01)
V [auth d]	e2axtd1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
D	e2axtD1	A: Bacterial photosystem II reaction centre L and M subunits-like	X: Bacterial photosystem II reaction centre L and M subunits-like	H: Bacterial photosystem II reaction centre L and M subunits-like	T: Photo_RC	F:	ECOD (20:10:01)
U [auth c]	e2axtc1	A: TIM beta/alpha-barrel	X: TIM barrels	H: TIM barrels	T: RNA_pol_I_A49	F:	ECOD (20:10:01)
C	e2axtC1	A: Photosystem II antenna protein-like	X: Photosystem II antenna protein-like	H: Photosystem II antenna protein-like	T: PSII	F:	ECOD (20:10:01)
T [auth b]	e2axtb1	A: TIM beta/alpha-barrel	X: TIM barrels	H: TIM barrels	T: RNA_pol_I_A49	F:	ECOD (20:10:01)
B	e2axtB2	A: Immunoglobulin-like beta-sandwich	X: Immunoglobulin-related	H: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	T: C1-set	F:	ECOD (20:10:01)
R [auth Z]	e2axtZ1	A: PsbZ-like	X: PsbZ-like	H: PsbZ-like	T: Ycf9	F:	ECOD (20:10:01)
JA [auth z]	e2axtz1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
P [auth V]	e2axtV1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: p53 tetramerization domain	H: p53 tetramerization domain	T: Cation_efflux	F:	ECOD (20:10:01)
HA [auth v]	e2axtv1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
O [auth U]	e2axtU1	A: HhH/H2TH	X: SAM/DNA-glycosylase	H: SAM domain-like	T: PsbU	F:	ECOD (20:10:01)
GA [auth u]	e2axtu1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
N [auth T]	e2axtT1	A: FkpA dimerization domain-like	X: FkpA dimerization domain-like	H: FkpA dimerization domain-like	T: FKBP_N	F:	ECOD (20:10:01)
FA [auth t]	e2axtt1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
M [auth O]	e2axtO1	A: Outer membrane meander beta-barrels	X: OMPA-like	H: OMPA-like	T: MSP	F:	ECOD (20:10:01)
EA [auth o]	e2axto1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
L [auth M]	e2axtM1	A: Photosystem II reaction center protein M, PsbM	X: Photosystem II reaction center protein M, PsbM	H: Photosystem II reaction center protein M, PsbM	T: PsbM	F:	ECOD (20:10:01)
DA [auth m]	e2axtm1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
K [auth L]	e2axtL1	A: Photosystem II reaction center protein L, PsbL	X: Photosystem II reaction center protein L, PsbL	H: Photosystem II reaction center protein L, PsbL	T: PsbL	F:	ECOD (20:10:01)
CA [auth l]	e2axtl1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
J [auth K]	e2axtK1	A: Photosystem II reaction center protein K, PsbK	X: Photosystem II reaction center protein K, PsbK	H: Photosystem II reaction center protein K, PsbK	T: PsbK	F:	ECOD (20:10:01)
BA [auth k]	e2axtk1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
S [auth a]	e2axta1	A: HTH	X: HTH	H: winged helix domain	T: MATH_2	F:	ECOD (20:10:01)
A	e2axtA1	A: Bacterial photosystem II reaction centre L and M subunits-like	X: Bacterial photosystem II reaction centre L and M subunits-like	H: Bacterial photosystem II reaction centre L and M subunits-like	T: Photo_RC	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
Y [auth h]	1.20.5.880	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Photosystem II reaction center protein H	CATH (4.3.0)
G [auth H]	1.20.5.880	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Photosystem II reaction center protein H	CATH (4.3.0)
W [auth e]	1.20.5.860	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Photosystem II cytochrome b559, alpha subunit	CATH (4.3.0)
E	1.20.5.860	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Photosystem II cytochrome b559, alpha subunit	CATH (4.3.0)
U [auth c]	1.10.10.670	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	photosystem ii from thermosynechococcus elongatus	CATH (4.3.0)
C	1.10.10.670	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	photosystem ii from thermosynechococcus elongatus	CATH (4.3.0)
T [auth b]	3.10.680.10	Alpha Beta	Roll	Photosystem II CP47 reaction center protein	Photosystem II CP47 reaction center protein	CATH (4.3.0)
B	3.10.680.10	Alpha Beta	Roll	Photosystem II CP47 reaction center protein	Photosystem II CP47 reaction center protein	CATH (4.3.0)
R [auth Z]	1.10.287.740	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Photosystem II PsbZ, reaction centre	CATH (4.3.0)
JA [auth z]	1.10.287.740	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Photosystem II PsbZ, reaction centre	CATH (4.3.0)
P [auth V]	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
HA [auth v]	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
O [auth U]	1.10.150.320	Mainly Alpha	Orthogonal Bundle	DNA polymerase	domain 1	CATH (4.3.0)
GA [auth u]	1.10.150.320	Mainly Alpha	Orthogonal Bundle	DNA polymerase	domain 1	CATH (4.3.0)
M [auth O]	2.40.160.30	Mainly Beta	Beta Barrel	Porin	Photosystem II, cytochrome c-550 precursor	CATH (4.3.0)
M [auth O]	3.30.2050.10	Alpha Beta	2-Layer Sandwich	photosynthetic oxygen evolving center fold	photosynthetic oxygen evolving center domain	CATH (4.3.0)
EA [auth o]	2.40.160.30	Mainly Beta	Beta Barrel	Porin	Photosystem II, cytochrome c-550 precursor	CATH (4.3.0)
EA [auth o]	3.30.2050.10	Alpha Beta	2-Layer Sandwich	photosynthetic oxygen evolving center fold	photosynthetic oxygen evolving center domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
H [auth I], Z [auth i]	PF02532	Photosystem II reaction centre I protein (PSII 4.8 kDa protein) (PsbI)	Photosystem II reaction centre I protein (PSII 4.8 kDa protein)	-	Family
G [auth H], Y [auth h]	PF00737	Photosystem II 10 kDa phosphoprotein (PsbH)	Photosystem II 10 kDa phosphoprotein	-	Family
E, W [auth e]	PF00283	Cytochrome b559, alpha (gene psbE) and beta (gene psbF)subunits (Cytochrom_B559)	Cytochrome b559, alpha (gene psbE) and beta (gene psbF)subunits	-	Family
E, W [auth e]	PF00284	Lumenal portion of Cytochrome b559, alpha (gene psbE) subunit (Cytochrom_B559a)	Lumenal portion of Cytochrome b559, alpha (gene psbE) subunit	-	Family
D, V [auth d]	PF00124	Photosynthetic reaction centre protein (Photo_RC)	Photosynthetic reaction centre protein	-	Family
C, U [auth c]	PF00421	Photosystem II protein (PSII)	Photosystem II protein	-	Family
JA [auth z], R [auth Z]	PF01737	YCF9 (Ycf9)	YCF9	-	Family
HA [auth v], P [auth V]	PF14495	Cytochrome c-550 domain (Cytochrom_C550)	Cytochrome c-550 domain	This domain is a heme binding cytochrome known as cytochrome c550, or cytochrome c549, or PsbV [1].	Domain
GA [auth u], O [auth U]	PF06514	Photosystem II 12 kDa extrinsic protein (PsbU) (PsbU)	Photosystem II 12 kDa extrinsic protein (PsbU)	-	Family
FA [auth t], N [auth T]	PF01405	Photosystem II reaction centre T protein (PsbT)	Photosystem II reaction centre T protein	The exact function of this protein is unknown. It probably consists of a single transmembrane spanning helix. The Swiss:P37256 protein, appears to be (i) a novel photosystem II subunit and (ii) required for maintaining optimal photosystem II activity ...	The exact function of this protein is unknown. It probably consists of a single transmembrane spanning helix. The Swiss:P37256 protein, appears to be (i) a novel photosystem II subunit and (ii) required for maintaining optimal photosystem II activity under adverse growth conditions [1].	Domain
DA [auth m], L [auth M]	PF05151	Photosystem II reaction centre M protein (PsbM) (PsbM)	Photosystem II reaction centre M protein (PsbM)	-	Family
CA [auth l], K [auth L]	PF02419	PsbL protein (PsbL)	PsbL protein	-	Family
BA [auth k], J [auth K]	PF02533	Photosystem II 4 kDa reaction centre component (PsbK)	Photosystem II 4 kDa reaction centre component	-	Family
A, S [auth a]	PF00124	Photosynthetic reaction centre protein (Photo_RC)	Photosynthetic reaction centre protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
AA [auth j], I [auth J]	Photosystem II reaction center J protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
H [auth I], Z [auth i]	Photosystem II reaction center I protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
G [auth H], Y [auth h]	Photosystem II reaction center H protein	ion binding binding anion binding phosphate ion binding small molecule binding	regulation of protein stability biological regulation regulation of biological quality protein stabilization photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
F, X [auth f]	Cytochrome b559 beta subunit	binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
E, W [auth e]	Cytochrome b559 alpha subunit	binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
D, V [auth d]	photosystem II reaction center D2 protein	oxidoreductase activity oxygen evolving activity catalytic activity chlorophyll binding binding tetrapyrrole binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
C, U [auth c]	photosystem II CP43 protein	chlorophyll binding binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
B, T [auth b]	CP47 protein	chlorophyll binding binding tetrapyrrole binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
JA [auth z], R [auth Z]	Photosystem II reaction center Z protein	-	photosynthesis metabolic process cellular process regulation of biological process regulation of cellular process regulation of photosynthesis photosynthesis, light reaction photosystem II stabilization regulation of photosynthesis, light reaction biological regulation regulation of generation of precursor metabolites and energy generation of precursor metabolites and energy regulation of metabolic process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
IA [auth x], Q [auth X]	Unassigned subunits	-	-	-
HA [auth v], P [auth V]	Cytochrome c-550	binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy cellular respiration energy derivation by oxidation of organic compounds respiratory electron transport chain electron transport chain	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
GA [auth u], O [auth U]	Photosystem II 12 kDa extrinsic protein	-	photosynthesis metabolic process cellular process regulation of biological process regulation of cellular process regulation of photosynthesis photosynthesis, light reaction photosystem II stabilization regulation of photosynthesis, light reaction biological regulation regulation of generation of precursor metabolites and energy generation of precursor metabolites and energy regulation of metabolic process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid extrinsic component of membrane protein-containing complex photosystem catalytic complex photosystem II membrane protein complex photosystem II oxygen evolving complex oxidoreductase complex
FA [auth t], N [auth T]	Photosystem II reaction center T protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
EA [auth o], M [auth O]	Photosystem II manganese-stabilizing polypeptide	oxidoreductase activity oxygen evolving activity catalytic activity	photosynthesis protein-containing complex organization photosynthesis, light reaction generation of precursor metabolites and energy photosystem II assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex assembly cellular process metabolic process cellular component organization or biogenesis regulation of biological process regulation of cellular process photosynthesis protein-containing complex organization photosynthesis, light reaction generation of precursor metabolites and energy photosystem II assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex assembly cellular process metabolic process cellular component organization or biogenesis regulation of biological process regulation of cellular process regulation of photosynthesis photosystem II stabilization regulation of photosynthesis, light reaction biological regulation regulation of generation of precursor metabolites and energy regulation of metabolic process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid protein-containing complex photosystem catalytic complex photosystem II membrane protein complex photosystem II oxygen evolving complex oxidoreductase complex
DA [auth m], L [auth M]	Photosystem II reaction center M protein	-	photosynthesis photosynthesis, light reaction metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
CA [auth l], K [auth L]	Photosystem II reaction center L protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
BA [auth k], J [auth K]	Photosystem II reaction center protein K	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle photosystem II reaction center intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm
A, S [auth a]	Photosystem Q(B) protein	oxidoreductase activity oxygen evolving activity catalytic activity chlorophyll binding binding tetrapyrrole binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor oxidoreductase activity, acting on diphenols and related substances as donors oxidoreductase activity oxygen evolving activity catalytic activity chlorophyll binding binding tetrapyrrole binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor oxidoreductase activity, acting on diphenols and related substances as donors electron transfer activity	response to stimulus response to chemical response to stress response to herbicide response to toxic substance photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain photosynthetic electron transport in photosystem II metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid plasma membrane-derived chromatophore membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
AA [auth j], I [auth J]	IPR002682	Photosystem II PsbJ	Family
AA [auth j], I [auth J]	IPR037267	Photosystem II PsbJ superfamily	Homologous Superfamily
H [auth I], Z [auth i]	IPR037271	Photosystem II PsbI superfamily	Homologous Superfamily
H [auth I], Z [auth i]	IPR003686	Photosystem II PsbI	Family
G [auth H], Y [auth h]	IPR036863	Photosystem II reaction centre protein H superfamily	Homologous Superfamily
G [auth H], Y [auth h]	IPR001056	Photosystem II reaction centre protein H	Family
F, X [auth f]	IPR006241	Photosystem II cytochrome b559, beta subunit	Family
F, X [auth f]	IPR013081	Photosystem II cytochrome b559, N-terminal	Domain
F, X [auth f]	IPR006216	Photosystem II cytochrome b559, conserved site	Conserved Site
E, W [auth e]	IPR013081	Photosystem II cytochrome b559, N-terminal	Domain
E, W [auth e]	IPR006217	Photosystem II cytochrome b559, alpha subunit	Family
E, W [auth e]	IPR013082	Photosystem II cytochrome b559, alpha subunit, lumenal region	Domain
E, W [auth e]	IPR037025	Photosystem II cytochrome b559, alpha subunit superfamily	Homologous Superfamily
E, W [auth e]	IPR006216	Photosystem II cytochrome b559, conserved site	Conserved Site
D, V [auth d]	IPR005868	Photosystem II D2	Family
D, V [auth d]	IPR036854	Photosystem II protein D1/D2 superfamily	Homologous Superfamily
D, V [auth d]	IPR000484	Photosynthetic reaction centre, L/M	Family
D, V [auth d]	IPR055265	Photosynthetic reaction centre, L/M, conserved site	Conserved Site
D, V [auth d]	IPR055266	Photosystem II protein D1/D2	Family
C, U [auth c]	IPR036001	Photosystem antenna protein-like superfamily	Homologous Superfamily
C, U [auth c]	IPR000932	Photosystem antenna protein-like	Family
C, U [auth c]	IPR005869	Photosystem II CP43 reaction centre protein	Family
C, U [auth c]	IPR044900	Photosystem II CP43 reaction centre protein superfamily	Homologous Superfamily
B, T [auth b]	IPR036001	Photosystem antenna protein-like superfamily	Homologous Superfamily
B, T [auth b]	IPR000932	Photosystem antenna protein-like	Family
B, T [auth b]	IPR017486	Photosystem II CP47 reaction centre protein	Family
JA [auth z], R [auth Z]	IPR036512	Photosystem II PsbZ superfamily	Homologous Superfamily
JA [auth z], R [auth Z]	IPR002644	Photosystem II PsbZ, reaction centre	Family
HA [auth v], P [auth V]	IPR017851	Photosystem II extrinsic protein V, cytochrome c-550 precursor	Family
HA [auth v], P [auth V]	IPR016003	Photosystem II extrinsic protein V, cytochrome c-550 precursor-like	Family
HA [auth v], P [auth V]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
HA [auth v], P [auth V]	IPR009056	Cytochrome c-like domain	Domain
HA [auth v], P [auth V]	IPR029490	Cytochrome c-550 domain	Domain
GA [auth u], O [auth U]	IPR010527	Photosystem II PsbU, oxygen evolving complex	Family
FA [auth t], N [auth T]	IPR001743	Photosystem II PsbT	Family
FA [auth t], N [auth T]	IPR037268	Photosystem II PsbT superfamily	Homologous Superfamily
EA [auth o], M [auth O]	IPR011250	Outer membrane protein/outer membrane enzyme PagP, beta-barrel	Homologous Superfamily
EA [auth o], M [auth O]	IPR002628	Photosystem II extrinsic protein O	Family
DA [auth m], L [auth M]	IPR007826	Photosystem II PsbM	Family
DA [auth m], L [auth M]	IPR037269	Photosystem II PsbM superfamily	Homologous Superfamily
CA [auth l], K [auth L]	IPR003372	Photosystem II PsbL	Family
CA [auth l], K [auth L]	IPR037266	Photosystem II PsbL superfamily	Homologous Superfamily
BA [auth k], J [auth K]	IPR037270	Photosystem II PsbK superfamily	Homologous Superfamily
BA [auth k], J [auth K]	IPR003687	Photosystem II PsbK	Family
A, S [auth a]	IPR036854	Photosystem II protein D1/D2 superfamily	Homologous Superfamily
A, S [auth a]	IPR005867	Photosystem II protein D1	Family
A, S [auth a]	IPR000484	Photosynthetic reaction centre, L/M	Family
A, S [auth a]	IPR055265	Photosynthetic reaction centre, L/M, conserved site	Conserved Site
A, S [auth a]	IPR055266	Photosystem II protein D1/D2	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, AA [auth j], B, BA [auth k], C A, AA [auth j], B, BA [auth k], C, CA [auth l], D, DA [auth m], E, EA [auth o], F, FA [auth t], G [auth H], GA [auth u], H [auth I], HA [auth v], I [auth J], J [auth K], JA [auth z], K [auth L], L [auth M], M [auth O], N [auth T], O [auth U], P [auth V], R [auth Z], S [auth a], T [auth b], U [auth c], V [auth d], W [auth e], X [auth f], Y [auth h], Z [auth i]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, AA [auth j], B, BA [auth k], C A, AA [auth j], B, BA [auth k], C, CA [auth l], D, DA [auth m], E, EA [auth o], F, FA [auth t], G [auth H], GA [auth u], H [auth I], HA [auth v], I [auth J], J [auth K], JA [auth z], K [auth L], L [auth M], M [auth O], N [auth T], O [auth U], P [auth V], R [auth Z], S [auth a], T [auth b], U [auth c], V [auth d], W [auth e], X [auth f], Y [auth h], Z [auth i]	MemProtMD	Annotated as membrane protein by MemProtMD