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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)DescriptionActionsGraphical viewLength
Metal bindingi11Iron-sulfur 1 (4Fe-4S)UniRule annotation1
Metal bindingi14Iron-sulfur 1 (4Fe-4S)UniRule annotation1
Metal bindingi17Iron-sulfur 1 (4Fe-4S)UniRule annotation1
Metal bindingi21Iron-sulfur 2 (4Fe-4S)UniRule annotation1
Metal bindingi48Iron-sulfur 2 (4Fe-4S)UniRule annotation1
Metal bindingi51Iron-sulfur 2 (4Fe-4S)UniRule annotation1
Metal bindingi54Iron-sulfur 2 (4Fe-4S)UniRule annotation1
Metal bindingi58Iron-sulfur 1 (4Fe-4S)UniRule annotation1

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)DescriptionActionsGraphical viewLength
ChainiPRO_00000619701 – 81Photosystem I iron-sulfur centerAdd BLAST81

Proteomic databases

PaxDbiP62090.
PRIDEiP62090.

PTM databases

iPTMnetiP62090.

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 interactors.
STRINGi3702.ATCG01060.1.

Structurei

3D structure databases

ProteinModelPortaliP62090.
SMRiP62090.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini2 – 314Fe-4S ferredoxin-type 1UniRule annotationAdd BLAST30
Domaini39 – 684Fe-4S ferredoxin-type 2UniRule annotationAdd BLAST30

Sequence similaritiesi

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

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiENOG410J0I9. Eukaryota.
COG1145. LUCA.
HOGENOMiHOG000230505.
InParanoidiP62090.
KOiK02691.
OMAiGQIAASP.
OrthoDBiEOG09360WOG.

Family and domain databases

HAMAPiMF_01303. PSI_PsaC. 1 hit.
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.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi29954. 2 interactors.
STRINGi3702.ATCG01060.1.

Protein family/group databases

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

PTM databases

iPTMnetiP62090.

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.
OrthoDBiEOG09360WOG.

Enzyme and pathway databases

BioCyciMetaCyc:MONOMER-1097.

Miscellaneous databases

PROiP62090.

Gene expression databases

GenevisibleiP62090. AT.

Family and domain databases

HAMAPiMF_01303. PSI_PsaC. 1 hit.
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...

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: November 2, 2016
This is version 91 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.