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P0A415 (PSAC_THEEB) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 71. 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
Ordered Locus Names:tsl1013
OrganismThermosynechococcus elongatus (strain BP-1) [Reference proteome] [HAMAP]
Taxonomic identifier197221 [NCBI]
Taxonomic lineageBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesThermosynechococcus

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/cytochrome c6-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. 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 cyanobacterial PSI reaction center is composed of one copy each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric complexes By similarity.

Subcellular location

Cellular thylakoid membrane; Peripheral membrane protein; Cytoplasmic 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 By similarity
Chain2 – 8180Photosystem I iron-sulfur center HAMAP-Rule MF_01303
PRO_0000062018

Regions

Domain2 – 31304Fe-4S ferredoxin-type 1
Domain37 – 68324Fe-4S ferredoxin-type 2

Sites

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

Secondary structure

..................... 81
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
P0A415 [UniParc].

Last modified January 23, 2007. Version 2.
Checksum: ED5362F4D6E48F36

FASTA818,800
        10         20         30         40         50         60 
MAHTVKIYDT CIGCTQCVRA CPTDVLEMVP WDGCKAGQIA SSPRTEDCVG CKRCETACPT 

        70         80 
DFLSIRVYLG AETTRSMGLA Y 

« Hide

References

« Hide 'large scale' references
[1]"Complete genome structure of the thermophilic cyanobacterium Thermosynechococcus elongatus BP-1."
Nakamura Y., Kaneko T., Sato S., Ikeuchi M., Katoh H., Sasamoto S., Watanabe A., Iriguchi M., Kawashima K., Kimura T., Kishida Y., Kiyokawa C., Kohara M., Matsumoto M., Matsuno A., Nakazaki N., Shimpo S., Sugimoto M. expand/collapse author list , Takeuchi C., Yamada M., Tabata S.
DNA Res. 9:123-130(2002) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: BP-1.
[2]"Structure of photosystem I."
Fromme P., Jordan P., Krauss N.
Biochim. Biophys. Acta 1507:5-31(2001) [PubMed] [Europe PMC] [Abstract]
Cited for: REVIEW.
[3]"Photosystem I at 4-A resolution represents the first structural model of a joint photosynthetic reaction centre and core antenna system."
Krauss N., Schubert W.-D., Klukas O., Fromme P., Witt H.T., Saenger W.
Nat. Struct. Biol. 3:965-973(1996) [PubMed] [Europe PMC] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (4.0 ANGSTROMS).
[4]"Photosystem I, an improved model of the stromal subunits PsaC, PsaD, and PsaE."
Klukas O., Schubert W.-D., Jordan P., Krauss N., Fromme P., Witt H.T., Saenger W.
J. Biol. Chem. 274:7351-7360(1999) [PubMed] [Europe PMC] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (4.0 ANGSTROMS).
[5]"Three-dimensional structure of cyanobacterial photosystem I at 2.5 A resolution."
Jordan P., Fromme P., Witt H.T., Klukas O., Saenger W., Krauss N.
Nature 411:909-917(2001) [PubMed] [Europe PMC] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (2.5 ANGSTROMS).
+Additional computationally mapped references.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
BA000039 Genomic DNA. Translation: BAC08565.1.
RefSeqNP_681803.1. NC_004113.1.

3D structure databases

PDBe
RCSB PDB
PDBj
EntryMethodResolution (Å)ChainPositionsPDBsum
1C51X-ray4.0
1JB0X-ray2.50C2-81[»]
2PPSX-ray4.0
3PCQX-ray8.98C2-81[»]
4FE1X-ray4.92C2-81[»]
ProteinModelPortalP0A415.
SMRP0A415. Positions 2-81.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING197221.tsl1013.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAC08565; BAC08565; BAC08565.
GeneID1011306.
KEGGtel:tsl1013.
PATRIC23927326. VBITheElo119873_1063.

Phylogenomic databases

eggNOGCOG1145.
HOGENOMHOG000230505.
KOK02691.
OMAEDCIGCK.
OrthoDBEOG60SCM3.
ProtClustDBPRK02651.

Family and domain databases

HAMAPMF_01303. PSI_PsaC.
InterProIPR001450. 4Fe4S-bd_dom.
IPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view]
PfamPF12838. Fer4_7. 1 hit.
[Graphical view]
TIGRFAMsTIGR03048. PS_I_psaC. 1 hit.
PROSITEPS00198. 4FE4S_FER_1. 2 hits.
PS51379. 4FE4S_FER_2. 2 hits.
[Graphical view]
ProtoNetSearch...

Other

EvolutionaryTraceP0A415.

Entry information

Entry namePSAC_THEEB
AccessionPrimary (citable) accession number: P0A415
Secondary accession number(s): P18083, P20451
Entry history
Integrated into UniProtKB/Swiss-Prot: March 15, 2005
Last sequence update: January 23, 2007
Last modified: February 19, 2014
This is version 71 of the entry and version 2 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

PDB cross-references

Index of Protein Data Bank (PDB) cross-references