3A0B | pdb_00003a0b

Crystal structure of Br-substituted Photosystem II complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free: 
    0.358 (Depositor), 0.286 (DCC) 
  • R-Value Work: 
    0.302 (Depositor), 0.286 (DCC) 
  • R-Value Observed: 
    0.302 (Depositor) 

Starting Model: experimental
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Literature

Location of chloride and its possible functions in oxygen-evolving photosystem II revealed by X-ray crystallography

Kawakami, K.Umena, Y.Kamiya, N.Shen, J.-R.

(2009) Proc Natl Acad Sci U S A 106: 8567-8572

  • DOI: https://doi.org/10.1073/pnas.0812797106
  • Primary Citation Related Structures: 
    3A0B, 3A0H

  • PubMed Abstract: 

    The chloride ion, Cl(-), is an essential cofactor for oxygen evolution of photosystem II (PSII) and is closely associated with the Mn(4)Ca cluster. Its detailed location and function have not been identified, however. We substituted Cl(-) with a bromide ion (Br(-)) or an iodide ion (I(-)) in PSII and analyzed the crystal structures of PSII with Br(-) and I(-) substitutions. Substitution of Cl(-) with Br(-) did not inhibit oxygen evolution, whereas substitution of Cl(-) with I(-) completely inhibited oxygen evolution, indicating the efficient replacement of Cl(-) by I(-). PSII with Br(-) and I(-) substitutions were crystallized, and their structures were analyzed. The results showed that there are 2 anion-binding sites in each PSII monomer; they are located on 2 sides of the Mn(4)Ca cluster at equal distances from the metal cluster. Anion-binding site 1 is close to the main chain of D1-Glu-333, and site 2 is close to the main chain of CP43-Glu-354; these 2 residues are coordinated directly with the Mn(4)Ca cluster. In addition, site 1 is located in the entrance of a proton exit channel. These results indicate that these 2 Cl(-) anions are required to maintain the coordination structure of the Mn(4)Ca cluster as well as the proposed proton channel, thereby keeping the oxygen-evolving complex fully active.


  • Organizational Affiliation
    • Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University, Okayama 700-8530, Japan.

Macromolecule Content 

  • Total Structure Weight: 683.97 kDa 
  • Atom Count: 47,988 
  • Modeled Residue Count: 5,242 
  • Deposited Residue Count: 5,298 
  • Unique protein chains: 20

Macromolecules

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Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem Q(B) proteinA,
U [auth a]
344Thermostichus vulcanusMutation(s): 0 
EC: 1.10.3.9
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II core light harvesting proteinB,
V [auth b]
488Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 3
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II CP43 proteinC,
W [auth c]
447Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 4
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II D2 proteinD,
X [auth d]
340Thermostichus vulcanusMutation(s): 0 
EC: 1.10.3.9
Membrane Entity: Yes 
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Reference Sequence
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Entity ID: 5
MoleculeChains  Sequence LengthOrganismDetailsImage
Cytochrome b559 subunit alphaE,
Y [auth e]
83Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P12238 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 6
MoleculeChains  Sequence LengthOrganismDetailsImage
Cytochrome b559 subunit betaF,
Z [auth f]
44Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 7
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein HAA [auth h],
G [auth H]
64Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P19052 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 8
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein IBA [auth i],
H [auth I]
35Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 9
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein JCA [auth j],
I [auth J]
40Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 10
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein KDA [auth k],
J [auth K]
36Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P19054 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 11
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein LEA [auth l],
K [auth L]
37Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 12
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein MFA [auth m],
L [auth M]
36Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P12312 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 13
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II manganese-stabilizing polypeptideGA [auth o],
M [auth O]
242Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 14
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein THA [auth t],
N [auth T]
30Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P12313 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 15
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II 12 kDa extrinsic proteinIA [auth u],
O [auth U]
98Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P56152 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 16
MoleculeChains  Sequence LengthOrganismDetailsImage
Cytochrome c-550JA [auth v],
P [auth V]
137Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P0A387 (Thermostichus vulcanus)
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Reference Sequence
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Entity ID: 17
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein XKA [auth x],
Q [auth X]
34Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Reference Sequence
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Entity ID: 18
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein ycf12LA [auth y],
R [auth Y]
28Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
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Reference Sequence
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Entity ID: 19
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein YMA [auth n],
S [auth N]
24Thermostichus vulcanusMutation(s): 0 
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Entity ID: 20
MoleculeChains  Sequence LengthOrganismDetailsImage
Photosystem II reaction center protein ZNA [auth z],
T [auth Z]
62Thermostichus vulcanusMutation(s): 0 
Membrane Entity: Yes 
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Reference Sequence

Small Molecules

Ligands 11 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
DGD

Query on DGD



Download:Ideal Coordinates CCD File
HC [auth C]
IC [auth C]
IF [auth h]
JC [auth C]
TC [auth H]
HC [auth C],
IC [auth C],
IF [auth h],
JC [auth C],
TC [auth H],
TE [auth c],
UE [auth c],
VE [auth c]
DIGALACTOSYL DIACYL GLYCEROL (DGDG)
C51 H96 O15
LDQFLSUQYHBXSX-HXXRYREZSA-N
CLA

Query on CLA



Download:Ideal Coordinates CCD File
AB [auth B]
AC [auth C]
AE [auth b]
BB [auth B]
BC [auth C]
AB [auth B],
AC [auth C],
AE [auth b],
BB [auth B],
BC [auth C],
CB [auth B],
CC [auth C],
DB [auth B],
DC [auth C],
DD [auth a],
EB [auth B],
EC [auth C],
ED [auth a],
FB [auth B],
FC [auth C],
FD [auth a],
FE [auth c],
GB [auth B],
GE [auth c],
HB [auth B],
HE [auth c],
IB [auth B],
IE [auth c],
JB [auth B],
JE [auth c],
KB [auth B],
KC [auth D],
KE [auth c],
LB [auth B],
LC [auth D],
LD [auth b],
LE [auth c],
MB [auth B],
MC [auth D],
MD [auth b],
ME [auth c],
NB [auth B],
ND [auth b],
NE [auth c],
OB [auth B],
OD [auth b],
OE [auth c],
PD [auth b],
PE [auth c],
QA [auth A],
QD [auth b],
QE [auth c],
RA [auth A],
RC [auth H],
RD [auth b],
RE [auth c],
SA [auth A],
SD [auth b],
TB [auth C],
TD [auth b],
UB [auth C],
UD [auth b],
VB [auth C],
VD [auth b],
WB [auth C],
WD [auth b],
WE [auth d],
XB [auth C],
XD [auth b],
XE [auth d],
YB [auth C],
YD [auth b],
YE [auth d],
ZB [auth C],
ZD [auth b]
CHLOROPHYLL A
C55 H72 Mg N4 O5
ATNHDLDRLWWWCB-AENOIHSZSA-M
PHO

Query on PHO



Download:Ideal Coordinates CCD File
GD [auth a],
TA [auth A],
UA [auth A],
ZE [auth d]
PHEOPHYTIN A
C55 H74 N4 O5
CQIKWXUXPNUNDV-RCBXBCQGSA-N
LHG

Query on LHG



Download:Ideal Coordinates CCD File
JD [auth a],
XA [auth A]
1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
C38 H75 O10 P
BIABMEZBCHDPBV-MPQUPPDSSA-N
MGE

Query on MGE



Download:Ideal Coordinates CCD File
CF [auth d]
DF [auth d]
EE [auth b]
EF [auth d]
PC [auth D]
CF [auth d],
DF [auth d],
EE [auth b],
EF [auth d],
PC [auth D],
SB [auth B],
UC [auth J],
XC [auth L]
(1S)-2-(ALPHA-L-ALLOPYRANOSYLOXY)-1-[(TRIDECANOYLOXY)METHYL]ETHYL PALMITATE
C38 H72 O10
FIJGNIAJTZSERN-DQQGJSMTSA-N
HEM

Query on HEM



Download:Ideal Coordinates CCD File
GF [auth e],
MF [auth v],
QC [auth E],
ZC [auth V]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
PQ9

Query on PQ9



Download:Ideal Coordinates CCD File
AF [auth d],
HD [auth a],
NC [auth D],
VA [auth A]
5-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23,27-HEPTAMETHYLOCTACOSA-2,6,10,14,18,22,26-HEPTAENYL]-2,3-DIMETHYLBENZO-1,4-QUINONE
C43 H64 O2
JXUCGUASMMLSBH-HOHOQCMASA-N
BCR

Query on BCR



Download:Ideal Coordinates CCD File
AD [auth Z]
BE [auth b]
BF [auth d]
CE [auth b]
DE [auth b]
AD [auth Z],
BE [auth b],
BF [auth d],
CE [auth b],
DE [auth b],
GC [auth C],
HF [auth h],
ID [auth a],
JF [auth k],
KF [auth k],
LF [auth t],
NF [auth z],
OC [auth D],
PB [auth B],
QB [auth B],
RB [auth B],
SC [auth H],
SE [auth c],
VC [auth K],
WA [auth A],
WC [auth K],
YC [auth T]
BETA-CAROTENE
C40 H56
OENHQHLEOONYIE-JLTXGRSLSA-N
OEC

Query on OEC



Download:Ideal Coordinates CCD File
BD [auth a],
OA [auth A]
OXYGEN EVOLVING SYSTEM
Ca Mn4 O4
UFRGXNUNWYSFQE-UHFFFAOYSA-N
BR

Query on BR



Download:Ideal Coordinates CCD File
FF [auth d],
KD [auth a],
YA [auth A],
ZA [auth A]
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
FE2

Query on FE2



Download:Ideal Coordinates CCD File
CD [auth a],
PA [auth A]
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free:  0.358 (Depositor), 0.286 (DCC) 
  • R-Value Work:  0.302 (Depositor), 0.286 (DCC) 
  • R-Value Observed: 0.302 (Depositor) 
Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.589α = 90
b = 226.394β = 90
c = 307.514γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Non-polymer description, Refinement description
  • Version 2.1: 2024-10-23
    Changes: Structure summary