1BR1

SMOOTH MUSCLE MYOSIN MOTOR DOMAIN-ESSENTIAL LIGHT CHAIN COMPLEX WITH MGADP.ALF4 BOUND AT THE ACTIVE SITE

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1br1a1	All beta proteins	SH3-like barrel	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
A	d1br1a2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Motor proteins	Myosin S1, motor domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
C	d1br1c1	All beta proteins	SH3-like barrel	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
C	d1br1c2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Motor proteins	Myosin S1, motor domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
E	d1br1e1	All beta proteins	SH3-like barrel	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
E	d1br1e2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Motor proteins	Myosin S1, motor domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
G	d1br1g1	All beta proteins	SH3-like barrel	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
G	d1br1g2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Motor proteins	Myosin S1, motor domain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
B	d1br1b_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Essential Chain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
D	d1br1d_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Essential Chain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
F	d1br1f_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Essential Chain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
H	d1br1h_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Essential Chain	chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Myosin s1 fragment, N-terminal domain	8041636	3000319	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	P-loop motor domain	8044301	3002036	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	P-loop motor domain	8044301	3002036	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Myosin s1 fragment, N-terminal domain	8041636	3000319	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	P-loop motor domain	8044301	3002036	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Myosin s1 fragment, N-terminal domain	8041636	3000319	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Myosin s1 fragment, N-terminal domain	8041636	3000319	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	P-loop motor domain	8044301	3002036	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	EF-hand	8040884	3001983	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	EF-hand	8040884	3001983	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	EF-hand	8040884	3001983	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	EF-hand	8040884	3001983	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Myosin_N	e1br1A1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
A	IQ	e1br1A3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ	ECOD (1.6)
A	Myosin_head	e1br1A2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
C	Myosin_N	e1br1C1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
C	IQ	e1br1C3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ	ECOD (1.6)
C	Myosin_head	e1br1C2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
E	Myosin_N	e1br1E1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
E	IQ	e1br1E3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ	ECOD (1.6)
E	Myosin_head	e1br1E2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
G	Myosin_N	e1br1G1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
G	IQ	e1br1G3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ	ECOD (1.6)
G	Myosin_head	e1br1G2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
B	EF-hand_7_8	e1br1B4	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
B	EF-hand_7_5	e1br1B3	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
D	EF-hand_7_8	e1br1D4	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
D	EF-hand_7_5	e1br1D3	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
F	EF-hand_7_8	e1br1F4	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
F	EF-hand_7_5	e1br1F3	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
H	EF-hand_7_8	e1br1H4	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
H	EF-hand_7_5	e1br1H3	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.850.10	Alpha Beta	3-Layer(aba) Sandwich	Kinesin	Kinesin motor domain	CATH (4.3.0)
A	1.10.10.820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (4.3.0)
A	1.20.120.720	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Myosin VI head, motor domain, U50 subdomain	CATH (4.3.0)
A	1.20.58.530	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
C	3.40.850.10	Alpha Beta	3-Layer(aba) Sandwich	Kinesin	Kinesin motor domain	CATH (4.3.0)
C	1.10.10.820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (4.3.0)
C	1.20.120.720	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Myosin VI head, motor domain, U50 subdomain	CATH (4.3.0)
C	1.20.58.530	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
E	3.40.850.10	Alpha Beta	3-Layer(aba) Sandwich	Kinesin	Kinesin motor domain	CATH (4.3.0)
E	1.10.10.820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (4.3.0)
E	1.20.120.720	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Myosin VI head, motor domain, U50 subdomain	CATH (4.3.0)
E	1.20.58.530	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
G	3.40.850.10	Alpha Beta	3-Layer(aba) Sandwich	Kinesin	Kinesin motor domain	CATH (4.3.0)
G	1.10.10.820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (4.3.0)
G	1.20.120.720	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Myosin VI head, motor domain, U50 subdomain	CATH (4.3.0)
G	1.20.58.530	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
B	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
D	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
F	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
H	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C, E, G	PF02736	Myosin N-terminal SH3-like domain (Myosin_N)	Myosin N-terminal SH3-like domain	This domain has an SH3-like fold. It is found at the N-terminus of many but not all myosins. The function of this domain is unknown.	Domain
A, C, E, G	PF00063	Myosin head (motor domain) (Myosin_head)	Myosin head (motor domain)	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E, G	MYOSIN	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle myosin II binding myosin binding myosin light chain binding cation binding magnesium ion binding ion binding cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle myosin II binding myosin binding myosin light chain binding cation binding magnesium ion binding ion binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding ADP binding calmodulin binding cytoskeletal motor activity microfilament motor activity ATP-dependent activity	cellular developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly myosin filament assembly skeletal myofibril assembly muscle cell differentiation cellular component organization cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation cellular developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly myosin filament assembly skeletal myofibril assembly muscle cell differentiation cellular component organization cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation anatomical structure development actin filament-based process protein-containing complex assembly cellular component organization or biogenesis skeletal muscle myosin thick filament assembly developmental process actomyosin structure organization actin cytoskeleton organization organelle assembly protein-containing complex organization myosin filament organization anatomical structure morphogenesis striated muscle myosin thick filament assembly myofibril assembly organelle organization anatomical structure formation involved in morphogenesis cellular process striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization multicellular organismal process system process smooth muscle contraction muscle contraction muscle system process cardiac muscle cell development striated muscle tissue development multicellular organism development cardiac cell development muscle tissue development system development heart development cardiac muscle tissue development animal organ development cardiac muscle cell differentiation tissue development cardiocyte differentiation circulatory system development elastic fiber assembly extracellular matrix organization extracellular matrix assembly extracellular structure organization external encapsulating structure organization	protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle contractile muscle fiber myosin II complex cytoplasm supramolecular fiber protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle contractile muscle fiber myosin II complex cytoplasm supramolecular fiber muscle myosin complex supramolecular polymer supramolecular complex myosin filament myofibril
B, D, F, H	MYOSIN	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding nucleoside phosphate binding ADP binding purine nucleotide binding organic cyclic compound binding anion binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding nucleoside phosphate binding ADP binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding calcium ion binding myosin heavy chain binding cytoskeletal protein binding protein binding myosin binding structural molecule activity structural constituent of muscle myosin II binding cytoskeletal motor activity microfilament motor activity ATP-dependent activity	cellular component organization organelle organization actomyosin structure organization actin cytoskeleton organization actin filament-based process cellular process cellular component organization or biogenesis cytoskeleton organization cellular developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly muscle cell differentiation cellular component biogenesis cellular component organization organelle organization actomyosin structure organization actin cytoskeleton organization actin filament-based process cellular process cellular component organization or biogenesis cytoskeleton organization cellular developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly muscle cell differentiation cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation anatomical structure development developmental process organelle assembly anatomical structure morphogenesis myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization	cellular anatomical structure myosin II filament myosin filament supramolecular fiber supramolecular polymer supramolecular complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle cellular anatomical structure myosin II filament myosin filament supramolecular fiber supramolecular polymer supramolecular complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle membraneless organelle myosin II complex contractile muscle fiber cytoplasm muscle myosin complex actomyosin cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C, E, G	IPR036961	Kinesin motor domain superfamily	Homologous Superfamily
A, C, E, G	IPR001609	Myosin head, motor domain-like	Domain
A, C, E, G	IPR000048	IQ motif, EF-hand binding site	Binding Site
A, C, E, G	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, C, E, G	IPR014751	DNA repair protein XRCC4-like, C-terminal	Homologous Superfamily
A, C, E, G	IPR002928	Myosin tail	Domain
A, C, E, G	IPR004009	Myosin, N-terminal, SH3-like	Domain
A, C, E, G	IPR008989	Myosin S1 fragment, N-terminal	Homologous Superfamily
B, D, F, H	IPR050230	Calmodulin/Myosin light chain/Troponin C-like	Family
B, D, F, H	IPR002048	EF-hand domain	Domain
B, D, F, H	IPR011992	EF-hand domain pair	Homologous Superfamily