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Database: UniProt
Entry: P0A416
LinkDB: P0A416
Original site: P0A416 
ID   PSAC_SYNEL              Reviewed;          81 AA.
AC   P0A416; P18083; P20451;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   05-DEC-2018, entry version 84.
DE   RecName: Full=Photosystem I iron-sulfur center;
DE            EC=1.97.1.12;
DE   AltName: Full=9 kDa polypeptide;
DE   AltName: Full=PSI-C;
DE   AltName: Full=Photosystem I subunit VII;
DE   AltName: Full=PsaC;
GN   Name=psaC;
OS   Synechococcus elongatus.
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae;
OC   Synechococcus.
OX   NCBI_TaxID=32046;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8486290; DOI=10.1016/0378-1119(93)90618-D;
RA   Muehlenhoff U., Haehnel W., Witt H.T., Herrmann R.G.;
RT   "Genes encoding eleven subunits of photosystem I from the thermophilic
RT   cyanobacterium Synechococcus sp.";
RL   Gene 127:71-78(1993).
RN   [2]
RP   PROTEIN SEQUENCE OF 2-81.
RX   PubMed=1946336;
RA   Kotani N., Tsugita A., Aso K., Enami I.;
RT   "Amino acid sequence of 10-kDa protein in photosystem I reaction-
RT   center complex from a thermophilic cyanobacterium, Synechococcus
RT   elongatus naegeli.";
RL   Protein Seq. Data Anal. 4:93-96(1991).
RN   [3]
RP   PROTEIN SEQUENCE OF 2-32.
RX   PubMed=2119498;
RA   Enami I., Kaiho H., Izumi H., Katoh S., Kotani N., Jone C.S., Kamo M.,
RA   Tsugita A.;
RT   "N-terminal amino acid sequence analysis of small subunits of
RT   photosystem I reaction center complex from a thermophilic
RT   cyanobacterium, Synechococcus elongatus nageli.";
RL   Protein Seq. Data Anal. 3:257-262(1990).
RN   [4]
RP   REVIEW.
RX   PubMed=11687205; DOI=10.1016/S0005-2728(01)00195-5;
RA   Fromme P., Jordan P., Krauss N.;
RT   "Structure of photosystem I.";
RL   Biochim. Biophys. Acta 1507:5-31(2001).
CC   -!- FUNCTION: Apoprotein for the two 4Fe-4S centers FA and FB of
CC       photosystem I (PSI); essential for photochemical activity. FB is
CC       the terminal electron acceptor of PSI, donating electrons to
CC       ferredoxin. The C-terminus interacts with PsaA/B/D and helps
CC       assemble the protein into the PSI complex. Required for binding of
CC       PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-
CC       ferredoxin oxidoreductase, converting photonic excitation into a
CC       charge separation, which transfers an electron from the donor P700
CC       chlorophyll pair to the spectroscopically characterized acceptors
CC       A0, A1, FX, FA and FB in turn.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=hnu + oxidized [2Fe-2S]-[ferredoxin] + reduced
CC         [plastocyanin] = oxidized [plastocyanin] + reduced [2Fe-2S]-
CC         [ferredoxin]; Xref=Rhea:RHEA:30407, Rhea:RHEA-COMP:10000,
CC         Rhea:RHEA-COMP:10001, Rhea:RHEA-COMP:10039, Rhea:RHEA-
CC         COMP:10040, ChEBI:CHEBI:29036, ChEBI:CHEBI:30212,
CC         ChEBI:CHEBI:33737, ChEBI:CHEBI:33738, ChEBI:CHEBI:49552;
CC         EC=1.97.1.12;
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC       Note=Binds 2 [4Fe-4S] clusters. Cluster 2 is most probably the
CC       spectroscopically characterized electron acceptor FA and cluster 1
CC       is most probably FB.;
CC   -!- SUBUNIT: The cyanobacterial PSI reaction center is composed of one
CC       copy each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric
CC       complexes.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral
CC       membrane protein; Cytoplasmic side.
DR   EMBL; X63767; CAA45303.1; -; Genomic_DNA.
DR   PIR; S12734; JU0282.
DR   ProteinModelPortal; P0A416; -.
DR   SMR; P0A416; -.
DR   PRIDE; P0A416; -.
DR   eggNOG; COG1145; LUCA.
DR   GO; GO:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR   GO; GO:0042651; C:thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0009773; P:photosynthetic electron transport in photosystem I; IEA:InterPro.
DR   HAMAP; MF_01303; PSI_PsaC; 1.
DR   InterPro; IPR017896; 4Fe4S_Fe-S-bd.
DR   InterPro; IPR017900; 4Fe4S_Fe_S_CS.
DR   InterPro; IPR017491; PSI_PsaC.
DR   Pfam; PF12838; Fer4_7; 1.
DR   TIGRFAMs; TIGR03048; PS_I_psaC; 1.
DR   PROSITE; PS00198; 4FE4S_FER_1; 2.
DR   PROSITE; PS51379; 4FE4S_FER_2; 2.
PE   1: Evidence at protein level;
KW   4Fe-4S; Direct protein sequencing; Electron transport; Iron;
KW   Iron-sulfur; Membrane; Metal-binding; Oxidoreductase; Photosynthesis;
KW   Photosystem I; Repeat; Thylakoid; Transport.
FT   INIT_MET      1      1       Removed. {ECO:0000269|PubMed:1946336,
FT                                ECO:0000269|PubMed:2119498}.
FT   CHAIN         2     81       Photosystem I iron-sulfur center.
FT                                /FTId=PRO_0000062019.
FT   DOMAIN        2     31       4Fe-4S ferredoxin-type 1.
FT   DOMAIN       37     68       4Fe-4S ferredoxin-type 2.
FT   METAL        11     11       Iron-sulfur 1 (4Fe-4S). {ECO:0000250}.
FT   METAL        14     14       Iron-sulfur 1 (4Fe-4S). {ECO:0000250}.
FT   METAL        17     17       Iron-sulfur 1 (4Fe-4S). {ECO:0000250}.
FT   METAL        21     21       Iron-sulfur 2 (4Fe-4S). {ECO:0000250}.
FT   METAL        48     48       Iron-sulfur 2 (4Fe-4S). {ECO:0000250}.
FT   METAL        51     51       Iron-sulfur 2 (4Fe-4S). {ECO:0000250}.
FT   METAL        54     54       Iron-sulfur 2 (4Fe-4S). {ECO:0000250}.
FT   METAL        58     58       Iron-sulfur 1 (4Fe-4S). {ECO:0000250}.
SQ   SEQUENCE   81 AA;  8800 MW;  ED5362F4D6E48F36 CRC64;
     MAHTVKIYDT CIGCTQCVRA CPTDVLEMVP WDGCKAGQIA SSPRTEDCVG CKRCETACPT
     DFLSIRVYLG AETTRSMGLA Y
//
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