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P0A415

- PSAC_THEEB

UniProt

P0A415 - PSAC_THEEB

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Protein

Photosystem I iron-sulfur center

Gene

psaC

Organism
Thermosynechococcus elongatus (strain BP-1)
Status
Reviewed - Annotation score: 4 out of 5- Experimental evidence at protein leveli

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/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.

Catalytic activityi

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

Cofactori

[4Fe-4S] clusterBy similarityNote: 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

Sites

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

GO - Molecular functioni

  1. 4 iron, 4 sulfur cluster binding Source: UniProtKB-KW
  2. electron carrier activity Source: UniProtKB-HAMAP
  3. metal ion binding Source: UniProtKB-KW
  4. oxidoreductase activity Source: UniProtKB-KW

GO - Biological processi

  1. photosynthetic electron transport in photosystem I Source: InterPro
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

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

Names & Taxonomyi

Protein namesi
Recommended 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 namesi
Name:psaC
Ordered Locus Names:tsl1013
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesThermosynechococcus
ProteomesiUP000000440: Chromosome

Subcellular locationi

GO - Cellular componenti

  1. photosystem I Source: UniProtKB-KW
  2. thylakoid membrane Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Photosystem I, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Initiator methioninei1 – 11RemovedBy similarity
Chaini2 – 8180Photosystem I iron-sulfur centerPRO_0000062018Add
BLAST

Interactioni

Subunit structurei

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

Protein-protein interaction databases

STRINGi197221.tsl1013.

Structurei

Secondary structure

1
81
Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Beta strandi4 – 85Combined sources
Helixi16 – 205Combined sources
Beta strandi27 – 304Combined sources
Beta strandi32 – 343Combined sources
Beta strandi37 – 415Combined sources
Helixi45 – 473Combined sources
Helixi53 – 575Combined sources
Beta strandi60 – 623Combined sources
Beta strandi64 – 685Combined sources
Turni74 – 785Combined sources

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1C51X-ray4.0
1JB0X-ray2.50C2-81[»]
2PPSX-ray4.0
3PCQX-ray8.98C2-81[»]
4FE1X-ray4.92C2-81[»]
ProteinModelPortaliP0A415.
SMRiP0A415. Positions 2-81.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP0A415.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini2 – 31304Fe-4S ferredoxin-type 1Add
BLAST
Domaini37 – 68324Fe-4S ferredoxin-type 2Add
BLAST

Sequence similaritiesi

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

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiCOG1145.
HOGENOMiHOG000230505.
KOiK02691.
OMAiEDCIGCK.
OrthoDBiEOG60SCM3.

Family and domain databases

HAMAPiMF_01303. PSI_PsaC.
InterProiIPR001450. 4Fe4S-bd_dom.
IPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view]
PfamiPF12838. Fer4_7. 1 hit.
[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.

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

P0A415-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MAHTVKIYDT CIGCTQCVRA CPTDVLEMVP WDGCKAGQIA SSPRTEDCVG
60 70 80
CKRCETACPT DFLSIRVYLG AETTRSMGLA Y
Length:81
Mass (Da):8,800
Last modified:January 23, 2007 - v2
Checksum:iED5362F4D6E48F36
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA. Translation: BAC08565.1.
RefSeqiNP_681803.1. NC_004113.1.

Genome annotation databases

EnsemblBacteriaiBAC08565; BAC08565; BAC08565.
GeneIDi1011306.
KEGGitel:tsl1013.
PATRICi23927326. VBITheElo119873_1063.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA. Translation: BAC08565.1 .
RefSeqi NP_681803.1. NC_004113.1.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
Entry Method Resolution (Å) Chain Positions PDBsum
1C51 X-ray 4.0
1JB0 X-ray 2.50 C 2-81 [» ]
2PPS X-ray 4.0
3PCQ X-ray 8.98 C 2-81 [» ]
4FE1 X-ray 4.92 C 2-81 [» ]
ProteinModelPortali P0A415.
SMRi P0A415. Positions 2-81.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 197221.tsl1013.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblBacteriai BAC08565 ; BAC08565 ; BAC08565 .
GeneIDi 1011306.
KEGGi tel:tsl1013.
PATRICi 23927326. VBITheElo119873_1063.

Phylogenomic databases

eggNOGi COG1145.
HOGENOMi HOG000230505.
KOi K02691.
OMAi EDCIGCK.
OrthoDBi EOG60SCM3.

Miscellaneous databases

EvolutionaryTracei P0A415.

Family and domain databases

HAMAPi MF_01303. PSI_PsaC.
InterProi IPR001450. 4Fe4S-bd_dom.
IPR017896. 4Fe4S_Fe-S-bd.
IPR017900. 4Fe4S_Fe_S_CS.
IPR017491. PSI_PsaC.
[Graphical view ]
Pfami PF12838. Fer4_7. 1 hit.
[Graphical view ]
TIGRFAMsi TIGR03048. PS_I_psaC. 1 hit.
PROSITEi PS00198. 4FE4S_FER_1. 2 hits.
PS51379. 4FE4S_FER_2. 2 hits.
[Graphical view ]
ProtoNeti Search...

Publicationsi

« Hide 'large scale' publications
  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: BP-1.
  2. 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).

Entry informationi

Entry nameiPSAC_THEEB
AccessioniPrimary (citable) accession number: P0A415
Secondary accession number(s): P18083, P20451
Entry historyi
Integrated into UniProtKB/Swiss-Prot: March 15, 2005
Last sequence update: January 23, 2007
Last modified: November 26, 2014
This is version 75 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3