KEGG   ENZYME: 1.97.1.12Help
Entry
EC 1.97.1.12                Enzyme                                 

Name
photosystem I
Class
Oxidoreductases;
Other oxidoreductases;
Sole sub-subclass for oxidoreductases that do not belong in the other subclasses
BRITE hierarchy
Sysname
plastocyanin:ferredoxin oxidoreductase (light-dependent)
Reaction(IUBMB)
reduced plastocyanin + oxidized ferredoxin + hnu = oxidized plastocyanin + reduced ferredoxin [RN:R09542]
Reaction(KEGG)
Substrate
reduced plastocyanin [CPD:C03025];
oxidized ferredoxin [CPD:C00139];
hnu [CPD:C00205]
Product
oxidized plastocyanin [CPD:C03162];
reduced ferredoxin [CPD:C00138]
Comment
Contains chlorophyll, phylloquinones, carotenoids and [4Fe-4S] clusters.
Cytochrome c6 can act as an alternative electron donor, and flavodoxin as an alternative acceptor in some species.
History
EC 1.97.1.12 created 2011
Reference
1  [PMID:1778985]
  Authors
Takabe T, Iwasaki Y, Hibino T, Ando T
  Title
Subunit composition of Photosystem I complex that catalyzes light-dependent transfer of electrons from plastocyanin to ferredoxin.
  Journal
J. Biochem. 110 (1991) 622-7.
Reference
2  [PMID:10504244]
  Authors
van Thor JJ, Geerlings TH, Matthijs HC, Hellingwerf KJ
  Title
Kinetic evidence for the PsaE-dependent transient ternary complex photosystem I/Ferredoxin/Ferredoxin:NADP(+) reductase in a cyanobacterium.
  Journal
Biochemistry. 38 (1999) 12735-46.
Reference
3  [PMID:11337410]
  Authors
Chitnis PR
  Title
PHOTOSYSTEM I: Function and Physiology.
  Journal
Annu. Rev. Plant. Physiol. Plant. Mol. Biol. 52 (2001) 593-626.
Reference
4  [PMID:19923216]
  Authors
Amunts A, Toporik H, Borovikova A, Nelson N
  Title
Structure determination and improved model of plant photosystem I.
  Journal
J. Biol. Chem. 285 (2010) 3478-86.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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