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- PDB-9gnw: Universal PSII assembly intermediate -

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Basic information

Entry
Database: PDB / ID: 9gnw
TitleUniversal PSII assembly intermediate
Components
  • (Cytochrome b559 subunit ...) x 2
  • (Photosystem II ...) x 15
  • PSII 6.1 kDa protein
  • PsbO
  • PsbP
KeywordsPHOTOSYNTHESIS / Green alga / PSII / D.salina / membrane protein / Cryo-EM / assembly intermediate / water-ferricyanide oxidoreductase.
Function / homology
Function and homology information


chloroplast thylakoid / photosystem II oxygen evolving complex / photosystem II assembly / 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 ...chloroplast thylakoid / photosystem II oxygen evolving complex / photosystem II assembly / 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 / extrinsic component of membrane / chlorophyll binding / photosynthetic electron transport in photosystem II / phosphate ion binding / chloroplast thylakoid membrane / photosynthesis, light reaction / : / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / heme binding / calcium ion binding / metal ion binding
Similarity search - Function
PsbP, C-terminal / PsbP / Mog1/PsbP, alpha/beta/alpha sandwich / Photosystem II PsbW, class 2 / Photosystem II reaction centre W protein (PsbW) / Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / Photosystem II PsbO, manganese-stabilising / Manganese-stabilising protein / photosystem II polypeptide ...PsbP, C-terminal / PsbP / Mog1/PsbP, alpha/beta/alpha sandwich / Photosystem II PsbW, class 2 / Photosystem II reaction centre W protein (PsbW) / Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / Photosystem II PsbO, manganese-stabilising / Manganese-stabilising protein / photosystem II polypeptide / 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 / Outer membrane protein/outer membrane enzyme PagP, beta-barrel / : / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature.
Similarity search - Domain/homology
1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / BETA-CAROTENE / BICARBONATE ION / Chem-C7Z / CHLOROPHYLL A / DIACYL GLYCEROL / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE ...1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / BETA-CAROTENE / BICARBONATE ION / Chem-C7Z / CHLOROPHYLL A / DIACYL GLYCEROL / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / CA-MN4-O5 CLUSTER / PHEOPHYTIN A / Chem-PL9 / (3R)-beta,beta-caroten-3-ol / Chem-SQD / Photosystem II D2 protein / Photosystem II CP47 reaction center protein / Photosystem II reaction center protein J / Photosystem II reaction center protein H / Cytochrome b559 subunit beta / Uncharacterized protein / Photosystem II PsbX / Oxygen-evolving enhancer protein 2, chloroplastic / PSII 6.1 kDa protein / Photosystem II reaction center protein K / Photosystem II reaction center protein I / Photosystem II CP43 reaction center protein / Photosystem II reaction center protein Z / Photosystem II reaction center protein M / Cytochrome b559 subunit alpha / Photosystem II reaction center protein T / Photosystem II protein D1 / Photosystem II reaction center protein Psb30 / Photosystem II reaction center protein L
Similarity search - Component
Biological speciesDunaliella salina (plant)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.93 Å
AuthorsFadeeva, M. / Klaiman, D. / Nelson, N.
Funding support Israel, 1items
OrganizationGrant numberCountry
Israel Science Foundation199/21 Israel
CitationJournal: To Be Published
Title: Universal PSII assembly intermediate
Authors: Fadeeva, M. / Klaiman, D. / Nelson, N.
History
DepositionSep 4, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 17, 2025Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 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

Downloads & links

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Assembly

Deposited unit
A: Photosystem II protein D1
B: Photosystem II CP47 reaction center protein
V: Photosystem II reaction center protein Psb30
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
O: PsbO
P: PsbP
T: Photosystem II reaction center protein T
W: PSII 6.1 kDa protein
X: Photosystem II PsbX
Z: Photosystem II reaction center protein Z
U: Photosystem II reaction center protein U, PsbU
hetero molecules


Theoretical massNumber of molelcules
Total (without water)345,79997
Polymers288,31120
Non-polymers57,48877
Water19811
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Photosystem II ... , 15 types, 15 molecules ABVCDHIJKLMTXZU

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


Mass: 37291.488 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FY08, photosystem II
#2: Protein Photosystem II CP47 reaction center protein / PSII 47 kDa protein / Protein CP-47


Mass: 53321.516 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A1C8XRM6
#3: Protein/peptide Photosystem II reaction center protein Psb30 / Photosystem II reaction center protein Ycf12


Mass: 3349.144 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FY13
#4: Protein Photosystem II CP43 reaction center protein / PSII 43 kDa protein / Protein CP-43


Mass: 49128.992 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FXY3
#5: Protein Photosystem II D2 protein / PSII D2 protein / Photosystem Q(A) protein


Mass: 38965.383 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A1C8XRK9, photosystem II
#8: Protein Photosystem II reaction center protein H / PSII-H / PsbH


Mass: 7124.381 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A1C8XRP3
#9: Protein/peptide Photosystem II reaction center protein I / PSII-I / PSII 4.8 kDa protein


Mass: 3743.417 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FXX5
#10: Protein/peptide Photosystem II reaction center protein J / PSII-J


Mass: 3725.447 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A1C8XRM8
#11: Protein/peptide Photosystem II reaction center protein K / PSII-K / PsbK


Mass: 4159.991 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FXX2
#12: Protein/peptide Photosystem II reaction center protein L / PSII-L


Mass: 4214.929 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FY19
#13: Protein/peptide Photosystem II reaction center protein M / PSII-M


Mass: 3320.033 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FXZ3
#16: Protein/peptide Photosystem II reaction center protein T / PSII-T / PsbT


Mass: 3478.194 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FY04
#18: Protein/peptide Photosystem II PsbX


Mass: 3202.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A7S3VKF3
#19: Protein Photosystem II reaction center protein Z / PSII-Z / PsbZ


Mass: 6430.616 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FXZ2
#20: Protein/peptide Photosystem II reaction center protein U, PsbU


Mass: 3377.869 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast

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Cytochrome b559 subunit ... , 2 types, 2 molecules EF

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


Mass: 8743.847 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: D0FY01
#7: Protein/peptide Cytochrome b559 subunit beta / PSII reaction center subunit VI


Mass: 3549.299 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A1C8XRP4

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Protein , 2 types, 2 molecules OP

#14: Protein PsbO


Mass: 25874.908 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A7S3QTM3
#15: Protein PsbP


Mass: 20553.898 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A9J4RF14

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Protein/peptide , 1 types, 1 molecules W

#17: Protein/peptide PSII 6.1 kDa protein


Mass: 4755.367 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Dunaliella salina (plant) / Organ: chloroplast / References: UniProt: A0A9J4RF15

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Sugars , 2 types, 5 molecules

#33: Sugar
ChemComp-DGD / DIGALACTOSYL DIACYL GLYCEROL (DGDG)


Type: saccharide / Mass: 949.299 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C51H96O15
#39: Sugar ChemComp-LMU / DODECYL-ALPHA-D-MALTOSIDE


Type: D-saccharide / Mass: 510.615 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C24H46O11 / Comment: detergent*YM

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Non-polymers , 18 types, 83 molecules

#21: Chemical ChemComp-OEX / CA-MN4-O5 CLUSTER


Mass: 339.827 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: CaMn4O5
#22: Chemical ChemComp-FE2 / FE (II) ION


Mass: 55.845 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Fe
#23: Chemical ChemComp-CL / CHLORIDE ION


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


Mass: 893.489 Da / Num. of mol.: 35 / Source method: obtained synthetically / Formula: C55H72MgN4O5
#25: Chemical ChemComp-PHO / PHEOPHYTIN A


Mass: 871.200 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C55H74N4O5
#26: Chemical
ChemComp-BCR / BETA-CAROTENE


Mass: 536.873 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C40H56
#27: 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.: 2 / Source method: obtained synthetically / Formula: C41H78O12S
#28: Chemical
ChemComp-LMG / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE


Mass: 787.158 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C45H86O10
#29: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#30: Chemical ChemComp-BCT / BICARBONATE ION


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


Mass: 722.970 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C38H75O10P / Comment: phospholipid*YM
#32: Chemical ChemComp-C7Z / (1~{S})-3,5,5-trimethyl-4-[(1~{E},3~{E},5~{E},7~{E},9~{E},11~{E},13~{E},15~{E},17~{E})-3,7,12,16-tetramethyl-18-[(4~{S})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol


Mass: 568.871 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C40H56O2
#34: Chemical ChemComp-3PH / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / PHOSPHATIDIC ACID


Mass: 704.998 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C39H77O8P
#35: Chemical ChemComp-DGA / DIACYL GLYCEROL


Mass: 625.018 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C39H76O5
#36: 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.: 1 / Source method: obtained synthetically / Formula: C53H80O2
#37: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#38: Chemical ChemComp-RRX / (3R)-beta,beta-caroten-3-ol / beta-Cryptoxanthin


Mass: 552.872 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C40H56O
#40: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 11 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
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: Photosystem II / Type: COMPLEX / Entity ID: #1-#20 / Source: NATURAL
Molecular weightValue: 0.35 MDa / Experimental value: YES
Source (natural)Organism: Dunaliella salina (plant)
Buffer solutionpH: 6.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 130000 X / Nominal defocus max: 2250 nm / Nominal defocus min: 750 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 2 / Num. of real images: 29916

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Processing

EM software
IDNameVersionCategory
1RELION4.0.0particle selection
4CTFFIND4.1CTF correction
10RELION4.0.0initial Euler assignment
11RELION4.0.0final Euler assignment
12RELION4.0.0classification
13RELION4.0.03D reconstruction
CTF correctionType: NONE
Particle selectionNum. of particles selected: 5349698
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.93 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 118340 / Algorithm: FOURIER SPACE / Num. of class averages: 2 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00525118
ELECTRON MICROSCOPYf_angle_d1.16734549
ELECTRON MICROSCOPYf_dihedral_angle_d18.5359476
ELECTRON MICROSCOPYf_chiral_restr0.0443474
ELECTRON MICROSCOPYf_plane_restr0.0064167

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