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P10793 (PSAC_PEA) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 102. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Photosystem I iron-sulfur center

EC=1.97.1.12
Alternative name(s):
9 kDa polypeptide
PSI-C
Photosystem I subunit VII
PsaC
Gene names
Name:psaC
Synonyms:frxA
Encoded onPlastid; Chloroplast
OrganismPisum sativum (Garden pea)
Taxonomic identifier3888 [NCBI]
Taxonomic lineageEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsfabidsFabalesFabaceaePapilionoideaeFabeaePisum

Protein attributes

Sequence length81 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at protein level

General annotation (Comments)

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 By similarity. HAMAP-Rule MF_01303

Catalytic activity

Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin. HAMAP-Rule MF_01303

Cofactor

Binds 2 4Fe-4S clusters. Cluster 2 is most probably the spectroscopically characterized electron acceptor FA and cluster 1 is most probably FB By similarity.

Subunit structure

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

Subcellular location

Plastidchloroplast thylakoid membrane; Peripheral membrane protein; Stromal side By similarity HAMAP-Rule MF_01303.

Sequence similarities

Contains 2 4Fe-4S ferredoxin-type domains.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Initiator methionine11Removed Ref.2
Chain2 – 8180Photosystem I iron-sulfur center HAMAP-Rule MF_01303
PRO_0000061996

Regions

Domain2 – 31304Fe-4S ferredoxin-type 1
Domain39 – 68304Fe-4S ferredoxin-type 2

Sites

Metal binding111Iron-sulfur 1 (4Fe-4S) By similarity
Metal binding141Iron-sulfur 1 (4Fe-4S) By similarity
Metal binding171Iron-sulfur 1 (4Fe-4S) By similarity
Metal binding211Iron-sulfur 2 (4Fe-4S) By similarity
Metal binding481Iron-sulfur 2 (4Fe-4S) By similarity
Metal binding511Iron-sulfur 2 (4Fe-4S) By similarity
Metal binding541Iron-sulfur 2 (4Fe-4S) By similarity
Metal binding581Iron-sulfur 1 (4Fe-4S) By similarity

Secondary structure

........... 81
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
P10793 [UniParc].

Last modified January 23, 2007. Version 3.
Checksum: 680556D8CB5603BF

FASTA818,980
        10         20         30         40         50         60 
MSHSVKIYDT CIGCTQCVRA CPTDVLEMIP WGGCKAKQIA SAPRTEDCVG CKRCESACPT 

        70         80 
DFLSVRVYLW HETTRSMGLA Y 

« Hide

References

[1]"Localization and nucleotide sequence of the gene for the 8 kDa subunit of photosystem I in pea and wheat chloroplast DNA."
Dunn P.P.J., Gray J.C.
Plant Mol. Biol. 11:311-319(1988) [AGRICOLA] [Europe PMC]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]"N-terminal amino acid sequence analysis of the subunits of pea photosystem I."
Dunn P.P.J., Packman L.C., Pappin D., Gray J.C.
FEBS Lett. 228:157-161(1988) [PubMed] [Europe PMC] [Abstract]
Cited for: PROTEIN SEQUENCE OF 2-49.
+Additional computationally mapped references.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
X13157 Genomic DNA. Translation: CAA31554.1.
PIRFEPM1S. S04033.
RefSeqYP_003587533.1. NC_014057.1.

3D structure databases

PDBe
RCSB PDB
PDBj
EntryMethodResolution (Å)ChainPositionsPDBsum
1YO9model-C2-81[»]
2O01X-ray3.40C2-81[»]
2WSCX-ray3.30C1-81[»]
2WSEX-ray3.49C1-81[»]
2WSFX-ray3.48C1-81[»]
3LW5X-ray3.30C1-81[»]
ProteinModelPortalP10793.
SMRP10793. Positions 2-81.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

DIPDIP-60283N.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

GeneID9073063.

Phylogenomic databases

ProtClustDBCHL00065.

Family and domain databases

HAMAPMF_01303. PSI_PsaC.
InterProIPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view]
TIGRFAMsTIGR03048. PS_I_psaC. 1 hit.
PROSITEPS00198. 4FE4S_FER_1. 2 hits.
PS51379. 4FE4S_FER_2. 2 hits.
[Graphical view]
ProtoNetSearch...

Other

EvolutionaryTraceP10793.

Entry information

Entry namePSAC_PEA
AccessionPrimary (citable) accession number: P10793
Entry history
Integrated into UniProtKB/Swiss-Prot: July 1, 1989
Last sequence update: January 23, 2007
Last modified: February 19, 2014
This is version 102 of the entry and version 3 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

PDB cross-references

Index of Protein Data Bank (PDB) cross-references