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PDBsum entry 4l6v

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protein ligands Protein-protein interface(s) links
Electron transport PDB id
4l6v
Jmol
Contents
Protein chains
739 a.a.
728 a.a.
80 a.a.
138 a.a.
68 a.a.
125 a.a.
151 a.a.
31 a.a.
38 a.a.
80 a.a.
Ligands
CLA ×273
PQN ×6
SF4 ×9
BCR ×57
LHG ×9
LMG ×3
PDB id:
4l6v
Name: Electron transport
Title: Crystal structure of a virus like photosystem i from the cyanobacterium synechocystis pcc 6803
Structure: Photosystem i p700 chlorophyll a apoprotein a1. Chain: a, a, 1. Synonym: psaa. Engineered: yes. Photosystem i p700 chlorophyll a apoprotein a2. Chain: b, b, 2. Synonym: psab. Engineered: yes. Photosystem i iron-sulfur center.
Source: Synechocystis sp. Pcc 6803. Organism_taxid: 1148. Gene: psaa, best7613_2234, myo_18690. Expressed in: synechocystis sp. Pcc 6803. Expression_system_taxid: 1148. Gene: psab, best7613_2235, myo_18700. Gene: psac, best7613_5694, myo_120930. Gene: psae, best7613_5968, myo_118260. Gene: psaf, best7613_2928.
Resolution:
3.80Å     R-factor:   0.255     R-free:   0.297
Authors: Y.Mazor,D.Nataf,H.Toporik,N.Nelson
Key ref: Y.Mazor et al. (2014). Crystal structures of virus-like photosystem I complexes from the mesophilic cyanobacterium Synechocystis PCC 6803. Elife, 3, e01496. PubMed id: 24473073 DOI: 10.7554/eLife.01496
Date:
13-Jun-13     Release date:   05-Feb-14    
PROCHECK
Go to PROCHECK summary
 Headers
 References

Protein chains
Pfam   ArchSchema ?
P29254  (PSAA_SYNY3) -  Photosystem I P700 chlorophyll a apoprotein A1
Seq:
Struc:
 
Seq:
Struc:
751 a.a.
739 a.a.
Protein chains
Pfam   ArchSchema ?
P29255  (PSAB_SYNY3) -  Photosystem I P700 chlorophyll a apoprotein A2
Seq:
Struc:
 
Seq:
Struc:
731 a.a.
728 a.a.
Protein chains
Pfam   ArchSchema ?
P32422  (PSAC_SYNY3) -  Photosystem I iron-sulfur center
Seq:
Struc:
81 a.a.
80 a.a.
Protein chains
Pfam   ArchSchema ?
P19569  (PSAD_SYNY3) -  Photosystem I reaction center subunit II
Seq:
Struc:
141 a.a.
138 a.a.
Protein chains
Pfam   ArchSchema ?
P12975  (PSAE_SYNY3) -  Photosystem I reaction center subunit IV
Seq:
Struc:
74 a.a.
68 a.a.
Protein chains
Pfam   ArchSchema ?
P29256  (PSAF_SYNY3) -  Photosystem I reaction center subunit III
Seq:
Struc:
165 a.a.
125 a.a.*
Protein chains
Pfam   ArchSchema ?
Q55329  (PSAJ_SYNY3) -  Photosystem I reaction center subunit IX
Seq:
Struc:
40 a.a.
125 a.a.*
Protein chains
Pfam   ArchSchema ?
P37277  (PSAL_SYNY3) -  Photosystem I reaction center subunit XI
Seq:
Struc:
157 a.a.
151 a.a.
Protein chains
Pfam   ArchSchema ?
P72986  (PSAM_SYNY3) -  Photosystem I reaction center subunit XII
Seq:
Struc:
31 a.a.
31 a.a.
Protein chains
Pfam   ArchSchema ?
Q55330  (PSAI_SYNY3) -  Photosystem I reaction center subunit VIII
Seq:
Struc:
40 a.a.
38 a.a.
Protein chains
Pfam   ArchSchema ?
P74564  (PSAK2_SYNY3) -  Photosystem I reaction center subunit PsaK 2
Seq:
Struc:
90 a.a.
80 a.a.
Key:    PfamA domain  Secondary structure  CATH domain
* PDB and UniProt seqs differ at 41 residue positions (black crosses)

 Enzyme reactions 
   Enzyme class: Chains A, B, C, a, b, c, 1, 2, 3: E.C.1.97.1.12  - Photosystem I.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]
      Reaction: Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin
 Gene Ontology (GO) functional annotation 
  GO annot!
  Cellular component     membrane   7 terms 
  Biological process     oxidation-reduction process   4 terms 
  Biochemical function     electron carrier activity     8 terms  

 

 
DOI no: 10.7554/eLife.01496 Elife 3:e01496 (2014)
PubMed id: 24473073  
 
 
Crystal structures of virus-like photosystem I complexes from the mesophilic cyanobacterium Synechocystis PCC 6803.
Y.Mazor, D.Nataf, H.Toporik, N.Nelson.
 
  ABSTRACT  
 
Oxygenic photosynthesis supports virtually all life forms on earth. Light energy is converted by two photosystems-photosystem I (PSI) and photosystem II (PSII). Globally, nearly 50% of photosynthesis takes place in the Ocean, where single cell cyanobacteria and algae reside together with their viruses. An operon encoding PSI was identified in cyanobacterial marine viruses. We generated a PSI that mimics the salient features of the viral complex, named PSI(PsaJF). PSI(PsaJF) is promiscuous for its electron donors and can accept electrons from respiratory cytochromes. We solved the structure of PSI(PsaJF) and a monomeric PSI, with subunit composition similar to the viral PSI, providing for the first time a detailed description of the reaction center and antenna system from mesophilic cyanobacteria, including red chlorophylls and cofactors of the electron transport chain. Our finding extends the understanding of PSI structure, function and evolution and suggests a unique function for the viral PSI. DOI: http://dx.doi.org/10.7554/eLife.01496.001.