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- PDB-9i82: Cryo-EM structure of PSII intermediate Psb27-PSII -

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Basic information

Entry
Database: PDB / ID: 9i82
TitleCryo-EM structure of PSII intermediate Psb27-PSII
Components
  • (Cytochrome b559 subunit ...) x 2
  • (Photosystem II ...) x 15
KeywordsPHOTOSYNTHESIS / Photosystem II / Assembly intermediate
Function / homology
Function and homology information


photosystem II repair / thylakoid lumen / photosystem II assembly / thylakoid / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor ...photosystem II repair / thylakoid lumen / photosystem II assembly / thylakoid / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / response to herbicide / photosystem II / plasma membrane-derived thylakoid membrane / photosynthetic electron transport in photosystem II / chlorophyll binding / photosynthesis, light reaction / phosphate ion binding / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / heme binding / metal ion binding
Similarity search - Function
Photosystem II Psb27, cyanobacteria / Photosystem II Pbs27 / Photosystem II Pbs27 superfamily / Photosystem II Pbs27 / Photosystem II PsbX, type 1 subfamily / Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / Photosystem II reaction centre protein Ycf12 / Photosystem II complex subunit Ycf12 ...Photosystem II Psb27, cyanobacteria / Photosystem II Pbs27 / Photosystem II Pbs27 superfamily / Photosystem II Pbs27 / Photosystem II PsbX, type 1 subfamily / Photosystem II PsbJ / Photosystem II PsbJ superfamily / PsbJ / 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 CP43 reaction centre protein / Photosystem II PsbL superfamily / Photosystem II PsbT superfamily / Photosystem II CP43 reaction centre protein superfamily / Photosystem II reaction centre T protein / PsbL protein / Photosystem II PsbK / Photosystem II PsbK 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 protein D1 / Photosystem II reaction centre protein H / 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 reaction centre protein H superfamily / 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 / Photosystem II 10 kDa phosphoprotein / 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. / Prokaryotic membrane lipoprotein lipid attachment site profile.
Similarity search - Domain/homology
BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / : / PHEOPHYTIN A / Chem-PL9 ...BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / : / PHEOPHYTIN A / Chem-PL9 / Photosystem II protein D1 1 / Photosystem II reaction center protein J / Photosystem II D2 protein / Photosystem II assembly factor lipoprotein Psb27 / 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: 2.8 Å
AuthorsBohn, S. / Lo, Y.K. / Lambertz, J. / Furtges, T. / Rudack, T. / Nowaczyk, M.M. / Schuller, J.M.
Funding support Germany, 1items
OrganizationGrant numberCountry
German Research Foundation (DFG)SCHaqU 3364/1-1 Germany
CitationJournal: To Be Published
Title: Structural insights into late-stage photosystem II assembly by Psb32
Authors: Bohn, S. / Lo, Y.K. / Lambertz, J. / Meier-Credo, J. / Furtges, T. / Liauw, P. / Gasper-Schonenbrucher, R. / Wiens, D. / Langer, J.D. / Hochberg, G. / Hofmann, E. / Rudack, T. / Nowaczyk, M.M. / Schuller, J.M.
History
DepositionFeb 4, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 19, 2026Provider: repository / Type: Initial release
Revision 1.0Aug 19, 2026Data content type: EM metadata / Data content type: EM metadata / 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 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
1: Photosystem II lipoprotein Psb27
hetero molecules


Theoretical massNumber of molelcules
Total (without water)314,03982
Polymers265,05417
Non-polymers48,98565
Water00
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 ... , 15 types, 15 molecules ABCDHIJKLMTXYZ1

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


Mass: 39762.309 Da / Num. of mol.: 1 / 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.: 1 / 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.: 1 / 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.: 1 / 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.: 1 / 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: 4410.245 Da / Num. of mol.: 1 / 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.: 1 / 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.: 1 / 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.: 1 / 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.: 1 / 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-Tc


Mass: 3878.728 Da / Num. of mol.: 1 / 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.: 1 / 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.: 1 / 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.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DHJ2
#17: Protein Photosystem II lipoprotein Psb27 / Photosystem II 11 kDa protein


Mass: 15120.396 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DG60

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

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


Mass: 9580.840 Da / Num. of mol.: 1 / 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.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus vestitus BP-1 (bacteria)
References: UniProt: Q8DIN9

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Non-polymers , 11 types, 65 molecules

#18: Chemical ChemComp-FE / FE (III) ION


Mass: 55.845 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Fe / Feature type: SUBJECT OF INVESTIGATION
#19: Chemical ChemComp-MN / MANGANESE (II) ION


Mass: 54.938 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mn / Feature type: SUBJECT OF INVESTIGATION
#20: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl / Feature type: SUBJECT OF INVESTIGATION
#21: Chemical
ChemComp-BCR / BETA-CAROTENE


Mass: 536.873 Da / Num. of mol.: 11 / Source method: obtained synthetically / Formula: C40H56 / Feature type: SUBJECT OF INVESTIGATION
#22: Chemical...
ChemComp-CLA / CHLOROPHYLL A


Mass: 893.489 Da / Num. of mol.: 35 / Source method: obtained synthetically / Formula: C55H72MgN4O5 / Feature type: SUBJECT OF INVESTIGATION
#23: Chemical ChemComp-LHG / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE


Mass: 722.970 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C38H75O10P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM
#24: Chemical ChemComp-PHO / PHEOPHYTIN A


Mass: 871.200 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C55H74N4O5 / Feature type: SUBJECT OF INVESTIGATION
#25: 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.: 2 / Source method: obtained synthetically / Formula: C53H80O2 / Feature type: SUBJECT OF INVESTIGATION
#26: Chemical ChemComp-BCT / BICARBONATE ION


Mass: 61.017 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: CHO3 / Feature type: SUBJECT OF INVESTIGATION
#27: Chemical
ChemComp-LMG / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE


Mass: 787.158 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C45H86O10 / Feature type: SUBJECT OF INVESTIGATION
#28: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4 / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationN

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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 assembly intermediate with psb27 / Type: COMPLEX / Entity ID: #1-#17 / Source: RECOMBINANT
Source (natural)Organism: Thermosynechococcus vestitus BP-1 (bacteria)
Source (recombinant)Organism: Thermosynechococcus vestitus BP-1 (bacteria)
Buffer solutionpH: 6.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE

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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 defocus max: 3000 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 55 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 325601 / Symmetry type: POINT

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