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Protein

Photosystem I iron-sulfur center

Gene

psaC

Organism
Oryza sativa subsp. indica (Rice)
Status
Reviewed-Annotation score: -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

Keywordsi

Molecular functionOxidoreductase
Biological processElectron transport, Photosynthesis, Transport
Ligand4Fe-4S, Iron, Iron-sulfur, Metal-binding

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
ORF Names:9311169
Encoded oniPlastid; Chloroplast
OrganismiOryza sativa subsp. indica (Rice)
Taxonomic identifieri39946 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBOP cladeOryzoideaeOryzeaeOryzinaeOryzaOryza sativa
Proteomesi
  • UP000007015 Componenti: Chloroplast

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Chloroplast Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertion Graphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem I, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00002889862 – 81Photosystem I iron-sulfur centerAdd BLAST80

Expressioni

Gene expression databases

ExpressionAtlasiP0C360 baseline and differential

Interactioni

Subunit structurei

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

Structurei

3D structure databases

ProteinModelPortaliP0C360
SMRiP0C360
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

Keywords - Domaini

Repeat

Family and domain databases

HAMAPiMF_01303 PSI_PsaC, 1 hit
InterProiView protein in InterPro
IPR017896 4Fe4S_Fe-S-bd
IPR017900 4Fe4S_Fe_S_CS
IPR017491 PSI_PsaC
TIGRFAMsiTIGR03048 PS_I_psaC, 1 hit
PROSITEiView protein in PROSITE
PS00198 4FE4S_FER_1, 2 hits
PS51379 4FE4S_FER_2, 2 hits

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P0C360-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSHSVKIYDT CIGCTQCVRA CPTDVLEMIP WDGCKAKQIA SAPRTEDCVG
60 70 80
CKRCESACPT DFLSVRVYLG PETTRSMALS Y
Length:81
Mass (Da):8,899
Last modified:May 29, 2007 - v1
Checksum:i681F63DC8FC603BF
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AY522329 Genomic DNA Translation: AAS46093.1
RefSeqiYP_009161420.1, NC_027678.1
YP_654253.1, NC_008155.1

Genome annotation databases

EnsemblPlantsiCAA33954; CAA33954; CAA33954
GeneIDi25193427
4126910
GrameneiCAA33954; CAA33954; CAA33954

Similar proteinsi

Entry informationi

Entry nameiPSAC_ORYSI
AccessioniPrimary (citable) accession number: P0C360
Secondary accession number(s): P10794
, P69414, Q6QXX3, Q6QY36
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 29, 2007
Last sequence update: May 29, 2007
Last modified: February 28, 2018
This is version 55 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome