9AU4 image
Deposition Date 2024-02-28
Release Date 2024-12-25
Last Version Date 2024-12-25
Entry Detail
PDB ID:
9AU4
Keywords:
PHOTOSYNTHESIS
Title:
Cryo-EM structure of a photosystem I variant containing an unusual plastoquinone derivative in its electron transfer chain
Biological Source:
Source Organism:
Synechocystis sp. PCC 6803 (Taxon ID: 1148)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
2.03 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
9AU4 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A1
Gene (Uniprot):psaA
Chain IDs:A (auth: G), L (auth: a), W (auth: A)
Chain Length:751
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29254 Pfam ID:PF00223 EC:1.97.1.12
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A2
Chain IDs:B (auth: H), M (auth: b), X (auth: B)
Chain Length:730
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29255 Pfam ID:PF00223
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I iron-sulfur center
Gene (Uniprot):psaC
Chain IDs:C (auth: N), N (auth: c), Y (auth: C)
Chain Length:81
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P32422 Pfam ID:PF12838 EC:1.97.1.12
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit II
Gene (Uniprot):psaD
Chain IDs:D (auth: O), O (auth: d), Z (auth: D)
Chain Length:141
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P19569 Pfam ID:PF02531
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IV
Gene (Uniprot):psaE
Chain IDs:E (auth: P), P (auth: e), AA (auth: E)
Chain Length:74
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P12975 Pfam ID:PF02427
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit III
Gene (Uniprot):psaF
Chain IDs:F (auth: Q), Q (auth: f), BA (auth: F)
Chain Length:165
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29256 Pfam ID:PF02507
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit VIII
Gene (Uniprot):psaI
Chain IDs:G (auth: R), R (auth: i), CA (auth: I)
Chain Length:40
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:Q55330 Pfam ID:PF00796
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IX
Gene (Uniprot):psaJ
Chain IDs:H (auth: S), S (auth: j), DA (auth: J)
Chain Length:40
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:Q55329 Pfam ID:PF01701
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit PsaK 2
Gene (Uniprot):psaK2
Chain IDs:I (auth: T), T (auth: k), EA (auth: K)
Chain Length:90
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P74564 Pfam ID:PF01241
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XI
Gene (Uniprot):psaL
Chain IDs:J (auth: U), U (auth: l), FA (auth: L)
Chain Length:157
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P37277 Pfam ID:PF02605
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XII
Gene (Uniprot):psaM
Chain IDs:K (auth: V), V (auth: m), GA (auth: M)
Chain Length:31
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P72986 Pfam ID:PF07465
Ligand Molecules
45D
A1AGD
BCR
CA
CL
CLA
DGD
ECH
EQ3
LHG
LMG
LMT
SF4
SQD
ZEX
Primary Citation
Cryo-EM structure of a photosystem I variant containing an unusual plastoquinone derivative in its electron transfer chain.
Sci Adv 10 eadp4937 eadp4937 (2024)
PMID: 39612342 DOI: 10.1126/sciadv.adp4937

Abstact

Photosystem I (PS I) is a light-driven oxidoreductase responsible for converting photons into chemical bond energy. Its application for renewable energy was revolutionized by the creation of the MenB deletion (ΔmenB) variant in the cyanobacterium Synechocystis sp. PCC 6803, in which phylloquinone is replaced by plastoquinone-9 with a low binding affinity. This permits its exchange with exogenous quinones covalently coupled to dihydrogen catalysts that bind with high affinity, thereby converting PS I into a stable solar fuel catalyst. Here, we reveal the 2.03-Å-resolution cryo-EM structure of a recent MenB variant of PS I. The quinones and their binding environment are analyzed in the context of previous biophysical data, thereby enabling a protocol to solve future PS I hybrids and constructs from this genetically tractable cyanobacterium.

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Disease

Primary Citation of related structures
9AU4