6NWA image
Deposition Date 2019-02-06
Release Date 2019-05-29
Last Version Date 2024-03-20
Entry Detail
PDB ID:
6NWA
Keywords:
PHOTOSYNTHESIS
Title:
The structure of the photosystem I IsiA super-complex
Biological Source:
Source Organism:
Synechocystis sp. PCC 6803 (Taxon ID: 1148)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.48 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6NWA validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A1
Gene (Uniprot):psaA
Chain IDs:A, Q (auth: a), DA (auth: H)
Chain Length:751
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29254 Pfam ID:PF00223 EC:1.97.1.12
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I P700 chlorophyll a apoprotein A2
Gene (Uniprot):psaB
Chain IDs:B, R (auth: b), EA (auth: G)
Chain Length:731
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29255 Pfam ID:PF00223 EC:1.97.1.12
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I iron-sulfur center
Gene (Uniprot):psaC
Chain IDs:C, VA (auth: c), WA (auth: N)
Chain Length:81
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P32422 Pfam ID:PF12838 EC:1.97.1.12
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit II
Gene (Uniprot):psaD
Chain IDs:D, S (auth: d), FA (auth: O)
Chain Length:141
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P19569 Pfam ID:PF02531
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IV
Gene (Uniprot):psaE
Chain IDs:E, PA (auth: e), QA (auth: P)
Chain Length:74
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P12975 Pfam ID:PF02427
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit III
Gene (Uniprot):psaF
Chain IDs:F, RA (auth: f), SA (auth: Q)
Chain Length:165
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P29256 Pfam ID:PF02507
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit VIII
Gene (Uniprot):psaI
Chain IDs:G (auth: I), T (auth: i), GA (auth: R)
Chain Length:40
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:Q55330 Pfam ID:PF00796
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit IX
Gene (Uniprot):psaJ
Chain IDs:H (auth: J), TA (auth: j), UA (auth: S)
Chain Length:40
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:Q55329 Pfam ID:PF01701
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XI
Gene (Uniprot):psaL
Chain IDs:I (auth: L), V (auth: l), HA (auth: U)
Chain Length:157
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P37277 Pfam ID:PF02605
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit XII
Gene (Uniprot):psaM
Chain IDs:J (auth: M), W (auth: m), IA (auth: V)
Chain Length:31
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P72986 Pfam ID:PF07465
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Iron stress-induced chlorophyll-binding protein
Gene (Uniprot):isiA
Chain IDs:K (auth: W), L (auth: X), M (auth: Y), N (auth: Z), O (auth: g), P (auth: y), X (auth: n), Y (auth: o), Z (auth: p), AA (auth: q), BA (auth: r), CA (auth: h), JA (auth: t), KA (auth: u), LA (auth: s), MA (auth: w), NA (auth: x), OA (auth: v)
Chain Length:342
Number of Molecules:18
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:Q55274 Pfam ID:PF00421
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Photosystem I reaction center subunit PsaK 1
Gene (Uniprot):psaK1
Chain IDs:U (auth: k), XA (auth: K), YA (auth: T)
Chain Length:86
Number of Molecules:3
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P72712 Pfam ID:PF01241
Ligand Molecules
BCR
CA
CL0
CLA
LHG
LMG
LMT
PQN
SF4
Primary Citation
The structure of the stress-induced photosystem I-IsiA antenna supercomplex.
Nat.Struct.Mol.Biol. 26 443 449 (2019)
PMID: 31133699 DOI: 10.1038/s41594-019-0228-8

Abstact

Photochemical conversion in oxygenic photosynthesis takes place in two large protein-pigment complexes named photosystem II and photosystem I (PSII and PSI, respectively). Photosystems associate with antennae in vivo to increase the size of photosynthetic units to hundreds or thousands of pigments. Regulation of the interactions between antennae and photosystems allows photosynthetic organisms to adapt to their environment. In low-iron environments, cyanobacteria express IsiA, a PSI antenna, critical to their survival. Here we describe the structure of the PSI-IsiA complex isolated from the mesophilic cyanobacterium Synechocystis sp. PCC 6803. This 2-MDa photosystem-antenna supercomplex structure reveals more than 700 pigments coordinated by 51 subunits, as well as the mechanisms facilitating the self-assembly and association of IsiA with multiple PSI assemblies.

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Disease

Primary Citation of related structures
6NWA
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