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- PDB-9g6f: Inactive PSII dimer from native Peak4 PSII dimers -

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Basic information

Entry
Database: PDB / ID: 9g6f
TitleInactive PSII dimer from native Peak4 PSII dimers
Components
  • (Cytochrome b559 subunit ...) x 2
  • (Photosystem II ...) x 14
KeywordsPHOTOSYNTHESIS / PSII / native intermediate / PSII assembly
Function / homology
Function and homology information


oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / photosynthetic electron transport chain / photosystem II / response to herbicide / chlorophyll binding / plasma membrane-derived thylakoid membrane ...oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / photosynthetic electron transport chain / photosystem II / response to herbicide / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthetic electron transport in photosystem II / : / phosphate ion binding / photosynthesis, light reaction / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / heme binding / metal ion binding
Similarity search - Function
Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / Photosystem II PsbX, type 1 subfamily / Photosystem II reaction centre protein Ycf12 / Photosystem II complex subunit Ycf12 / Photosystem II reaction centre M protein (PsbM) / Photosystem II PsbM superfamily / Photosystem II PsbM / Photosystem II PsbZ, reaction centre ...Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / Photosystem II PsbX, type 1 subfamily / Photosystem II reaction centre protein Ycf12 / Photosystem II complex subunit Ycf12 / Photosystem II reaction centre M protein (PsbM) / Photosystem II PsbM superfamily / Photosystem II PsbM / Photosystem II PsbZ, reaction centre / Photosystem II PsbZ superfamily / YCF9 / Photosystem II PsbX / Photosystem II reaction centre X protein (PsbX) / Photosystem II PsbT / Photosystem II PsbL / Photosystem II PsbL superfamily / Photosystem II PsbT superfamily / Photosystem II reaction centre T protein / PsbL protein / Photosystem II PsbK / Photosystem II CP43 reaction centre protein / Photosystem II PsbK superfamily / Photosystem II CP43 reaction centre protein superfamily / Photosystem II 4 kDa reaction centre component / Photosystem II PsbI / Photosystem II CP47 reaction centre protein / Photosystem II PsbI superfamily / Photosystem II reaction centre I protein (PSII 4.8 kDa protein) / Photosystem II reaction centre protein H / Photosystem II reaction centre protein H superfamily / Photosystem II 10 kDa phosphoprotein / Photosystem II protein D1 / Photosystem II D2 protein / Photosystem II cytochrome b559, conserved site / Photosystem II cytochrome b559, alpha subunit / Photosystem II cytochrome b559, beta subunit / Photosystem II cytochrome b559, N-terminal / Photosystem II cytochrome b559, alpha subunit, lumenal region / Photosystem II cytochrome b559, alpha subunit superfamily / Cytochrome b559, alpha (gene psbE) and beta (gene psbF)subunits / Lumenal portion of Cytochrome b559, alpha (gene psbE) subunit / Cytochrome b559 subunits heme-binding site signature. / : / Photosystem antenna protein-like / Photosystem antenna protein-like superfamily / Photosystem II protein / : / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature.
Similarity search - Domain/homology
BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / EICOSANE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / PHEOPHYTIN A ...BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / EICOSANE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / PHEOPHYTIN A / Chem-PL9 / PALMITIC ACID / (3R)-beta,beta-caroten-3-ol / Chem-SQD / Photosystem II protein D1 1 / Photosystem II reaction center protein J / Photosystem II D2 protein / Photosystem II reaction center protein M / Photosystem II reaction center protein Z / Photosystem II CP43 reaction center protein / Photosystem II reaction center protein L / Cytochrome b559 subunit beta / Cytochrome b559 subunit alpha / Photosystem II reaction center protein T / Photosystem II CP47 reaction center protein / Photosystem II reaction center protein H / Photosystem II reaction center protein Psb30 / Photosystem II reaction center protein I / Photosystem II reaction center protein K / Photosystem II reaction center protein X
Similarity search - Component
Biological speciesThermosynechococcus vestitus BP-1 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.2 Å
AuthorsZhao, Z. / Vercellino, I. / Nixon, P.J. / Sazanov, L.A.
Funding support United Kingdom, 2items
OrganizationGrant numberCountry
Biotechnology and Biological Sciences Research Council (BBSRC)BB/I00937X/1 United Kingdom
Biotechnology and Biological Sciences Research Council (BBSRC)BB/V002007/1 United Kingdom
CitationJournal: To Be Published
Title: Inactive PSII dimer from the Peak4 PSII pool
Authors: Zhao, Z. / Vercellino, I. / Nixon, P.J. / Sazanov, L.A.
History
DepositionJul 18, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jul 30, 2025Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jul 30, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Photosystem II protein D1 1
B: Photosystem II CP47 reaction center protein
C: Photosystem II CP43 reaction center protein
D: Photosystem II D2 protein
E: Cytochrome b559 subunit alpha
F: Cytochrome b559 subunit beta
H: Photosystem II reaction center protein H
I: Photosystem II reaction center protein I
J: Photosystem II reaction center protein J
K: Photosystem II reaction center protein K
L: Photosystem II reaction center protein L
M: Photosystem II reaction center protein M
T: Photosystem II reaction center protein T
X: Photosystem II reaction center X protein
Y: Photosystem II reaction center protein Ycf12
Z: Photosystem II reaction center protein Z
a: Photosystem II protein D1 1
b: Photosystem II CP47 reaction center protein
c: Photosystem II CP43 reaction center protein
d: Photosystem II D2 protein
e: Cytochrome b559 subunit alpha
f: Cytochrome b559 subunit beta
h: Photosystem II reaction center protein H
i: Photosystem II reaction center protein I
j: Photosystem II reaction center protein J
k: Photosystem II reaction center protein K
l: Photosystem II reaction center protein L
m: Photosystem II reaction center protein M
t: Photosystem II reaction center protein T
x: Photosystem II reaction center X protein
y: Photosystem II reaction center protein Ycf12
z: Photosystem II reaction center protein Z
hetero molecules


Theoretical massNumber of molelcules
Total (without water)632,240244
Polymers500,00832
Non-polymers132,231212
Water14,574809
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Photosystem II ... , 14 types, 28 molecules AaBbCcDdHhIiJjKkLlMmTtXxYyZz

#1: Protein Photosystem II protein D1 1 / PSII D1 protein 1 / Photosystem II Q(B) protein 1


Mass: 39777.301 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: P0A444, photosystem II
#2: Protein Photosystem II CP47 reaction center protein / PSII 47 kDa protein / Protein CP-47


Mass: 56656.457 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIQ1
#3: Protein Photosystem II CP43 reaction center protein / PSII 43 kDa protein / Protein CP-43


Mass: 50287.500 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIF8
#4: Protein Photosystem II D2 protein / PSII D2 protein / Photosystem II Q(A) protein


Mass: 39388.156 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8CM25, photosystem II
#7: Protein Photosystem II reaction center protein H / PSII-H


Mass: 7358.754 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DJ43
#8: Protein/peptide Photosystem II reaction center protein I / PSII-I / PSII 4.4 kDa protein


Mass: 4438.255 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DJZ6
#9: Protein/peptide Photosystem II reaction center protein J / PSII-J


Mass: 4105.908 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: P59087
#10: Protein/peptide Photosystem II reaction center protein K / PSII-K


Mass: 5028.083 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q9F1K9
#11: Protein/peptide Photosystem II reaction center protein L / PSII-L


Mass: 4299.044 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIN8
#12: Protein/peptide Photosystem II reaction center protein M / PSII-M


Mass: 3981.673 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DHA7
#13: Protein/peptide Photosystem II reaction center protein T / PSII-T / PSII-Tc


Mass: 3906.738 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIQ0
#14: Protein/peptide Photosystem II reaction center X protein


Mass: 4322.226 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q9F1R6
#15: Protein/peptide Photosystem II reaction center protein Ycf12


Mass: 5039.143 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DJI1
#16: Protein Photosystem II reaction center protein Z / PSII-Z


Mass: 6766.187 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DHJ2

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Cytochrome b559 subunit ... , 2 types, 4 molecules EeFf

#5: Protein Cytochrome b559 subunit alpha / PSII reaction center subunit V


Mass: 9580.840 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIP0
#6: Protein/peptide Cytochrome b559 subunit beta / PSII reaction center subunit VI


Mass: 5067.900 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIN9

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Sugars , 2 types, 22 molecules

#29: Sugar
ChemComp-LMT / DODECYL-BETA-D-MALTOSIDE


Type: D-saccharide / Mass: 510.615 Da / Num. of mol.: 13 / Source method: obtained synthetically / Formula: C24H46O11 / Comment: detergent*YM
#30: Sugar
ChemComp-DGD / DIGALACTOSYL DIACYL GLYCEROL (DGDG)


Type: saccharide / Mass: 949.299 Da / Num. of mol.: 9 / Source method: obtained synthetically / Formula: C51H96O15

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Non-polymers , 15 types, 999 molecules

#17: Chemical ChemComp-FE2 / FE (II) ION


Mass: 55.845 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe
#18: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl
#19: Chemical...
ChemComp-CLA / CHLOROPHYLL A


Mass: 893.489 Da / Num. of mol.: 70 / Source method: obtained synthetically / Formula: C55H72MgN4O5
#20: Chemical
ChemComp-PHO / PHEOPHYTIN A


Mass: 871.200 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C55H74N4O5
#21: Chemical
ChemComp-BCR / BETA-CAROTENE


Mass: 536.873 Da / Num. of mol.: 20 / Source method: obtained synthetically / Formula: C40H56
#22: Chemical
ChemComp-SQD / 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL / SULFOQUINOVOSYLDIACYLGLYCEROL


Mass: 795.116 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C41H78O12S
#23: Chemical
ChemComp-PL9 / 2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,22,26,30,34-HEXATRIACONTANONAENYL-2,5-CYCLOHEXADIENE-1,4-DIONE-2,3-DIMETHYL-5-SOLANESYL-1,4-BENZOQUINONE / PLASTOQUINONE 9


Mass: 749.201 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C53H80O2
#24: Chemical...
ChemComp-LFA / EICOSANE / LIPID FRAGMENT


Mass: 282.547 Da / Num. of mol.: 33 / Source method: obtained synthetically / Formula: C20H42
#25: Chemical...
ChemComp-PLM / PALMITIC ACID


Mass: 256.424 Da / Num. of mol.: 24 / Source method: obtained synthetically / Formula: C16H32O2
#26: Chemical ChemComp-BCT / BICARBONATE ION


Mass: 61.017 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: CHO3
#27: Chemical
ChemComp-LHG / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE


Mass: 722.970 Da / Num. of mol.: 9 / Source method: obtained synthetically / Formula: C38H75O10P / Comment: phospholipid*YM
#28: Chemical
ChemComp-LMG / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE


Mass: 787.158 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C45H86O10
#31: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#32: Chemical ChemComp-RRX / (3R)-beta,beta-caroten-3-ol / beta-Cryptoxanthin


Mass: 552.872 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C40H56O
#33: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 809 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Inactive PSII dimer lacking extrinsic subunits at both monomer
Type: COMPLEX
Details: PSII complexes were pulled down with the His tag at the CP47. The His-eluate was applied to ion exchange chromatography. Four fractions were eluted: Psb27/PSII monomer, oxygen-evolving PSII ...Details: PSII complexes were pulled down with the His tag at the CP47. The His-eluate was applied to ion exchange chromatography. Four fractions were eluted: Psb27/PSII monomer, oxygen-evolving PSII monomer, fully functional PSII dimer, and half oxygen-evolving functional PSII dimer. Only the half-functional PSII dimer was not characterised. This structure of inactive PSII dimer is from the half-functional dimer.
Entity ID: #1-#16 / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Thermosynechococcus vestitus BP-1 (bacteria) / Cellular location: thylakoid membrane
Buffer solutionpH: 6.5
Details: 20 mM MES pH 6.5, 2.5 mM MgCl2, 2.5 mM CaCl2, 7 mM MgSO4, 0.03% DDM, 0.05% CHAPS
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R0.6/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 81000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 600 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 80 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 9173

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Processing

EM software
IDNameVersionCategory
1RELION4.0.0particle selection
2EPUimage acquisition
3SerialEMimage acquisition
5RELION4.0.0CTF correction
8Cootmodel fitting
10RELION4.0.0initial Euler assignment
11RELION4.0.0final Euler assignment
12RELION4.0.0classification
13RELION4.0.03D reconstruction
14PHENIXdev_4933+SVNmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 5900000
3D reconstructionResolution: 2.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 417537 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model building

3D fitting-ID: 1 / Source name: PDB / Type: experimental model

IDPDB-IDPdb chain-IDAccession codeChain-IDInitial refinement model-ID
17NHO

7nho

A7NHOA
27NHO

7nho

B7NHOB
37NHO

7nho

C7NHOC
47NHO

7nho

D7NHOD
57NHO

7nho

E7NHOE
67NHO

7nho

F7NHOF
77NHO

7nho

H7NHOH
87NHO

7nho

I7NHOI
93KZI

3kzi

J3KZIJ1
107NHO

7nho

K7NHOK
117NHO

7nho

L7NHOL
127NHO

7nho

M7NHOM
137NHO

7nho

T7NHOT
147NHO

7nho

X7NHOX
157NHO

7nho

Y7NHOY
167NHO

7nho

Z7NHOZ
177NHO

7nho

a7NHOa
187NHO

7nho

b7NHOb
197NHO

7nho

c7NHOc
207NHO

7nho

d7NHOd
217NHO

7nho

e7NHOe
227NHO

7nho

f7NHOf
237NHO

7nho

h7NHOh
247NHO

7nho

i7NHOi
253KZI

3kzi

j3KZIj1
267NHO

7nho

k7NHOk
277NHO

7nho

l7NHOl
287NHO

7nho

m7NHOm
297NHO

7nho

t7NHOt
307NHO

7nho

x7NHOx
317NHO

7nho

y7NHOy
327NHO

7nho

z7NHOz
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00443470
ELECTRON MICROSCOPYf_angle_d0.78959627
ELECTRON MICROSCOPYf_dihedral_angle_d17.0927775
ELECTRON MICROSCOPYf_chiral_restr0.0485764
ELECTRON MICROSCOPYf_plane_restr0.0077267

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