U3R9D8 · U3R9D8_IPOTI

Function

function

Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.

Catalytic activity

Cofactor

[4Fe-4S] cluster (UniProtKB | Rhea| CHEBI:49883 )

Note: Binds 2 [4Fe-4S] clusters. Cluster 2 is most probably the spectroscopically characterized electron acceptor FA and cluster 1 is most probably FB.

Features

Showing features for binding site.

TypeIDPosition(s)Description
Binding site11[4Fe-4S] cluster 1 (UniProtKB | ChEBI)
Binding site14[4Fe-4S] cluster 1 (UniProtKB | ChEBI)
Binding site17[4Fe-4S] cluster 1 (UniProtKB | ChEBI)
Binding site21[4Fe-4S] cluster 2 (UniProtKB | ChEBI)
Binding site48[4Fe-4S] cluster 2 (UniProtKB | ChEBI)
Binding site51[4Fe-4S] cluster 2 (UniProtKB | ChEBI)
Binding site54[4Fe-4S] cluster 2 (UniProtKB | ChEBI)
Binding site58[4Fe-4S] cluster 1 (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentchloroplast thylakoid membrane
Cellular Componentphotosystem I
Molecular Function4 iron, 4 sulfur cluster binding
Molecular Functionelectron transfer activity
Molecular Functionmetal ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthetic electron transport in photosystem I

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Photosystem I iron-sulfur center
  • EC number
  • Alternative names
    • 9 kDa polypeptide
    • PSI-C
    • Photosystem I subunit VII
    • PsaC

Gene names

    • Name
      psaC

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > asterids > lamiids > Solanales > Convolvulaceae > Ipomoeeae > Ipomoea

Accessions

  • Primary accession
    U3R9D8

Subcellular Location

Keywords

Interaction

Subunit

The eukaryotic PSI reaction center is composed of at least 11 subunits.

Structure

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-314Fe-4S ferredoxin-type
Domain39-684Fe-4S ferredoxin-type

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    81
  • Mass (Da)
    9,038
  • Last updated
    2013-12-11 v1
  • Checksum
    68071DB57FC603BF
MSHSVKIYDTCIGCTQCVRACPTDVLEMIPWDGCKAKQIASAPRTEDCVGCKRCESACPTDFLSVRVYLWHETTRSMGLAY

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KF242495
EMBL· GenBank· DDBJ
AGW98257.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
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