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Protein

Photosystem I iron-sulfur center

Gene

psaC

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

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.UniRule annotation

Catalytic activityi

Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin.UniRule annotation

Cofactori

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

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi11 – 111Iron-sulfur 1 (4Fe-4S)UniRule annotation
Metal bindingi14 – 141Iron-sulfur 1 (4Fe-4S)UniRule annotation
Metal bindingi17 – 171Iron-sulfur 1 (4Fe-4S)UniRule annotation
Metal bindingi21 – 211Iron-sulfur 2 (4Fe-4S)UniRule annotation
Metal bindingi48 – 481Iron-sulfur 2 (4Fe-4S)UniRule annotation
Metal bindingi51 – 511Iron-sulfur 2 (4Fe-4S)UniRule annotation
Metal bindingi54 – 541Iron-sulfur 2 (4Fe-4S)UniRule annotation
Metal bindingi58 – 581Iron-sulfur 1 (4Fe-4S)UniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

4Fe-4S, Iron, Iron-sulfur, Metal-binding

Enzyme and pathway databases

BioCyciMetaCyc:MONOMER-1097.

Protein family/group databases

TCDBi5.B.4.1.1. the plant photosystem i supercomplex (psi) family.

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem I iron-sulfur centerUniRule annotation (EC:1.97.1.12UniRule annotation)
Alternative name(s):
9 kDa polypeptideUniRule annotation
PSI-CUniRule annotation
Photosystem I subunit VIIUniRule annotation
PsaCUniRule annotation
Gene namesi
Name:psaCUniRule annotation
Synonyms:frxA
Ordered Locus Names:AtCg01060
Encoded oniPlastid; Chloroplast
OrganismiArabidopsis thaliana (Mouse-ear cress)
Taxonomic identifieri3702 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
Proteomesi
  • UP000006548 Componenti: Chloroplast

Organism-specific databases

TAIRiATCG01060.

Subcellular locationi

  • Plastidchloroplast thylakoid membrane UniRule annotation; Peripheral membrane protein UniRule annotation; Stromal side UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem I, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 8181Photosystem I iron-sulfur centerPRO_0000061970Add
BLAST

Proteomic databases

PaxDbiP62090.
PRIDEiP62090.

Expressioni

Gene expression databases

GenevisibleiP62090. AT.

Interactioni

Subunit structurei

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

Protein-protein interaction databases

BioGridi29954. 2 interactions.
STRINGi3702.ATCG01060.1.

Structurei

3D structure databases

ProteinModelPortaliP62090.
SMRiP62090. Positions 2-81.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini2 – 31304Fe-4S ferredoxin-type 1UniRule annotationAdd
BLAST
Domaini39 – 68304Fe-4S ferredoxin-type 2UniRule annotationAdd
BLAST

Sequence similaritiesi

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

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiENOG410J0I9. Eukaryota.
COG1145. LUCA.
HOGENOMiHOG000230505.
InParanoidiP62090.
KOiK02691.
OMAiGQIAASP.

Family and domain databases

HAMAPiMF_01303. PSI_PsaC.
InterProiIPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view]
TIGRFAMsiTIGR03048. PS_I_psaC. 1 hit.
PROSITEiPS00198. 4FE4S_FER_1. 2 hits.
PS51379. 4FE4S_FER_2. 2 hits.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P62090-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSHSVKIYDT CIGCTQCVRA CPTDVLEMIP WDGCKAKQIA SAPRTEDCVG
60 70 80
CKRCESACPT DFLSVRVYLW HETTRSMGLA Y
Length:81
Mass (Da):9,038
Last modified:January 23, 2007 - v2
Checksum:i68071DB57FC603BF
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AP000423 Genomic DNA. Translation: BAA84438.1.
AJ278354 Genomic DNA. Translation: CAB96190.1.
RefSeqiNP_051110.1. NC_000932.1.

Genome annotation databases

EnsemblPlantsiATCG01060.1; ATCG01060.1; ATCG01060.
GeneIDi844750.
GrameneiATCG01060.1; ATCG01060.1; ATCG01060.
KEGGiath:ArthCp075.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AP000423 Genomic DNA. Translation: BAA84438.1.
AJ278354 Genomic DNA. Translation: CAB96190.1.
RefSeqiNP_051110.1. NC_000932.1.

3D structure databases

ProteinModelPortaliP62090.
SMRiP62090. Positions 2-81.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi29954. 2 interactions.
STRINGi3702.ATCG01060.1.

Protein family/group databases

TCDBi5.B.4.1.1. the plant photosystem i supercomplex (psi) family.

Proteomic databases

PaxDbiP62090.
PRIDEiP62090.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiATCG01060.1; ATCG01060.1; ATCG01060.
GeneIDi844750.
GrameneiATCG01060.1; ATCG01060.1; ATCG01060.
KEGGiath:ArthCp075.

Organism-specific databases

TAIRiATCG01060.

Phylogenomic databases

eggNOGiENOG410J0I9. Eukaryota.
COG1145. LUCA.
HOGENOMiHOG000230505.
InParanoidiP62090.
KOiK02691.
OMAiGQIAASP.

Enzyme and pathway databases

BioCyciMetaCyc:MONOMER-1097.

Miscellaneous databases

PROiP62090.

Gene expression databases

GenevisibleiP62090. AT.

Family and domain databases

HAMAPiMF_01303. PSI_PsaC.
InterProiIPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view]
TIGRFAMsiTIGR03048. PS_I_psaC. 1 hit.
PROSITEiPS00198. 4FE4S_FER_1. 2 hits.
PS51379. 4FE4S_FER_2. 2 hits.
[Graphical view]
ProtoNetiSearch...

Publicationsi

« Hide 'large scale' publications
  1. "Complete structure of the chloroplast genome of Arabidopsis thaliana."
    Sato S., Nakamura Y., Kaneko T., Asamizu E., Tabata S.
    DNA Res. 6:283-290(1999) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: cv. Columbia.
  2. "Primary transcripts of ndhD of Liliaceae and Aloaceae require editing of the start and 20th codons."
    Lopez-Serrano M., del Campo E.M., Sabater B., Martin M.
    J. Exp. Bot. 52:179-180(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 68-81.
    Tissue: Leaf.

Entry informationi

Entry nameiPSAC_ARATH
AccessioniPrimary (citable) accession number: P62090
Secondary accession number(s): P07136
, P25252, Q9MRU0, Q9T2J4
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 1, 1988
Last sequence update: January 23, 2007
Last modified: February 17, 2016
This is version 88 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.