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- PDB-7czl: Structural insights into a dimeric Psb27-photosystem II complex f... -

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Entry
Database: PDB / ID: 7czl
TitleStructural insights into a dimeric Psb27-photosystem II complex from a cyanobacterium Thermosynechococcus vulcanus
Components
  • (Cytochrome b559 subunit ...) x 2
  • (Photosystem II ...) x 13
  • Psb27
KeywordsPLANT PROTEIN / dimeric photosystem II (PSII)-Psb27 complex from a cyanobacterium Thermosynechococcus vulcanus
Function / homology
Function and homology information


photosystem II stabilization / oxygen evolving activity / photosystem II / photosystem II reaction center / photosynthetic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / response to herbicide / photosystem II / photosynthetic electron transport in photosystem II / chlorophyll binding ...photosystem II stabilization / oxygen evolving activity / photosystem II / photosystem II reaction center / photosynthetic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / response to herbicide / photosystem II / photosynthetic electron transport in photosystem II / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis, light reaction / electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity / phosphate ion binding / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / heme binding / metal ion binding
Similarity search - Function
Photosystem II reaction centre protein Ycf12 / Photosystem II complex subunit Ycf12 / Photosystem II PsbX, type 1 subfamily / Photosystem II reaction centre M protein (PsbM) / Photosystem II PsbM superfamily / Photosystem II PsbZ, reaction centre / Photosystem II PsbZ superfamily / YCF9 / Photosystem II PsbM / Photosystem II PsbX ...Photosystem II reaction centre protein Ycf12 / Photosystem II complex subunit Ycf12 / Photosystem II PsbX, type 1 subfamily / Photosystem II reaction centre M protein (PsbM) / Photosystem II PsbM superfamily / Photosystem II PsbZ, reaction centre / Photosystem II PsbZ superfamily / YCF9 / Photosystem II PsbM / 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 CP43 reaction centre protein superfamily / Photosystem II reaction centre T protein / PsbL protein / Photosystem II PsbK / Photosystem II CP43 reaction centre protein / Photosystem II PsbK superfamily / Photosystem II 4 kDa reaction centre component / Photosystem II CP47 reaction centre protein / Photosystem II PsbI / Photosystem II PsbI superfamily / Photosystem II reaction centre I protein (PSII 4.8 kDa protein) / Photosystem II reaction centre protein H / 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 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.
Similarity search - Domain/homology
BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / Chem-MGE / PHEOPHYTIN A / Chem-PQ9 ...BETA-CAROTENE / BICARBONATE ION / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / : / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / Chem-MGE / PHEOPHYTIN A / Chem-PQ9 / Chem-SQD / Photosystem II CP47 reaction center protein / Photosystem II reaction center protein Psb30 / Photosystem II reaction center protein X / Photosystem II reaction center protein Z / Photosystem II CP43 reaction center protein / Photosystem II D2 protein / Cytochrome b559 subunit alpha / Cytochrome b559 subunit beta / Photosystem II reaction center protein I / Photosystem II reaction center protein L / Photosystem II reaction center protein M / Photosystem II reaction center protein T / Photosystem II reaction center protein H / Photosystem II reaction center protein K / Photosystem II protein D1
Similarity search - Component
Biological speciesThermosynechococcus vulcanus (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.78 Å
AuthorsPi, X. / Huang, G. / Xiao, Y.
CitationJournal: Proc Natl Acad Sci U S A / Year: 2021
Title: Structural insights into a dimeric Psb27-photosystem II complex from a cyanobacterium .
Authors: Guoqiang Huang / Yanan Xiao / Xiong Pi / Liang Zhao / Qingjun Zhu / Wenda Wang / Tingyun Kuang / Guangye Han / Sen-Fang Sui / Jian-Ren Shen /
Abstract: Photosystem II (PSII) is a multisubunit pigment-protein complex and catalyzes light-driven water oxidation, leading to the conversion of light energy into chemical energy and the release of molecular ...Photosystem II (PSII) is a multisubunit pigment-protein complex and catalyzes light-driven water oxidation, leading to the conversion of light energy into chemical energy and the release of molecular oxygen. Psb27 is a small thylakoid lumen-localized protein known to serve as an assembly factor for the biogenesis and repair of the PSII complex. The exact location and binding fashion of Psb27 in the intermediate PSII remain elusive. Here, we report the structure of a dimeric Psb27-PSII complex purified from a deletion mutant (ΔPsbV) of the cyanobacterium , solved by cryo-electron microscopy. Our structure showed that Psb27 is associated with CP43 at the luminal side, with specific interactions formed between Helix 2 and Helix 3 of Psb27 and a loop region between Helix 3 and Helix 4 of CP43 (loop C) as well as the large, lumen-exposed and hydrophilic E-loop of CP43. The binding of Psb27 imposes some conflicts with the N-terminal region of PsbO and also induces some conformational changes in CP43, CP47, and D2. This makes PsbO unable to bind in the Psb27-PSII. Conformational changes also occurred in D1, PsbE, PsbF, and PsbZ; this, together with the conformational changes occurred in CP43, CP47, and D2, may prevent the binding of PsbU and induce dissociation of PsbJ. This structural information provides important insights into the regulation mechanism of Psb27 in the biogenesis and repair of PSII.
History
DepositionSep 9, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 20, 2021Provider: repository / Type: Initial release
Revision 1.1Feb 10, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Assembly

Deposited unit
A: Photosystem II protein D1
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
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
Z: Photosystem II reaction center protein Z
a: Photosystem II protein D1
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
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
z: Photosystem II reaction center protein Z
Y: Photosystem II reaction center protein Ycf12
n: Psb27
N: Psb27
y: Photosystem II reaction center protein Ycf12
X: Photosystem II reaction center protein X
x: Photosystem II reaction center protein X
hetero molecules


Theoretical massNumber of molelcules
Total (without water)593,695178
Polymers485,26432
Non-polymers108,430146
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Photosystem II ... , 13 types, 26 molecules AaBbCcDdHhIiKkLlMmTtZzYyXx

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


Mass: 35894.949 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P51765, photosystem II
#2: Protein Photosystem II CP47 reaction center protein / / PSII 47 kDa protein / Protein CP-47


Mass: 56096.758 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: D0VWR1
#3: Protein Photosystem II CP43 reaction center protein / / PSII 43 kDa protein / Protein CP-43


Mass: 48648.688 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: D0VWR7
#4: Protein Photosystem II D2 protein / / PSII D2 protein / Photosystem Q(A) protein


Mass: 38005.484 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: D0VWR8, photosystem II
#7: Protein Photosystem II reaction center protein H / / PSII-H


Mass: 6986.271 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P19052
#8: Protein/peptide Photosystem II reaction center protein I / / PSII-I / PSII 4.4 kDa protein


Mass: 3923.706 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P12240
#9: Protein/peptide Photosystem II reaction center protein K / / PSII-K


Mass: 4101.911 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P19054
#10: 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 vulcanus (bacteria) / References: UniProt: P12241
#11: Protein/peptide Photosystem II reaction center protein M / / PSII-M


Mass: 3678.338 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P12312
#12: Protein/peptide Photosystem II reaction center protein T / / PSII-Tc


Mass: 3620.369 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P12313
#13: 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 vulcanus (bacteria) / References: UniProt: D0VWR5
#14: Protein/peptide Photosystem II reaction center protein Ycf12 /


Mass: 3228.035 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: D0VWR3
#16: Protein/peptide Photosystem II reaction center protein X /


Mass: 4191.030 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: D0VWR4

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

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


Mass: 7495.497 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P12238
#6: Protein/peptide Cytochrome b559 subunit beta / / PSII reaction center subunit VI


Mass: 3461.166 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria) / References: UniProt: P12239

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Protein , 1 types, 2 molecules nN

#15: Protein Psb27


Mass: 12234.814 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Thermosynechococcus vulcanus (bacteria)

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Sugars , 2 types, 14 molecules

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


Type: D-saccharide / Mass: 510.615 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C24H46O11 / Feature type: SUBJECT OF INVESTIGATION / Comment: detergent*YM
#26: Sugar
ChemComp-DGD / DIGALACTOSYL DIACYL GLYCEROL (DGDG)


Type: saccharideCarbohydrate / Mass: 949.299 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C51H96O15

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Non-polymers , 12 types, 132 molecules

#17: Chemical...
ChemComp-CLA / CHLOROPHYLL A / Chlorophyll a


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


Mass: 871.200 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C55H74N4O5
#19: Chemical
ChemComp-PQ9 / 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


Mass: 612.967 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C43H64O2
#20: Chemical...
ChemComp-BCR / BETA-CAROTENE / Β-Carotene


Mass: 536.873 Da / Num. of mol.: 22 / Source method: obtained synthetically / Formula: C40H56
#21: Chemical ChemComp-LHG / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / Phosphatidylglycerol


Mass: 722.970 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C38H75O10P / Comment: phospholipid*YM
#23: 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.: 6 / Source method: obtained synthetically / Formula: C41H78O12S
#24: Chemical ChemComp-BCT / BICARBONATE ION / Bicarbonate


Mass: 61.017 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: CHO3 / Feature type: SUBJECT OF INVESTIGATION / Comment: pH buffer*YM
#25: Chemical
ChemComp-MGE / (1S)-2-(ALPHA-L-ALLOPYRANOSYLOXY)-1-[(TRIDECANOYLOXY)METHYL]ETHYL PALMITATE / MONOGALACTOSYL-DIACYLGLYCEROL


Mass: 688.972 Da / Num. of mol.: 14 / Source method: obtained synthetically / Formula: C38H72O10
#27: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#28: Chemical ChemComp-FE2 / FE (II) ION


Mass: 55.845 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe / Feature type: SUBJECT OF INVESTIGATION
#29: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME / Heme B


Mass: 616.487 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#30: Chemical ChemComp-CL / CHLORIDE ION / Chloride


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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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: PSII-Psb27 / Type: COMPLEX / Entity ID: #1-#16 / Source: NATURAL
Source (natural)Organism: Thermosynechococcus vulcanus (bacteria)
Buffer solutionpH: 6
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
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 FIELDBright-field microscopy
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.10.1_2155: / Classification: refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.78 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 87473 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0142263
ELECTRON MICROSCOPYf_angle_d0.91358409
ELECTRON MICROSCOPYf_dihedral_angle_d13.72728659
ELECTRON MICROSCOPYf_chiral_restr0.0515744
ELECTRON MICROSCOPYf_plane_restr0.0067155

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