PSAC_NOSP7
ID PSAC_NOSP7 Reviewed; 81 AA.
AC B2J393;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 10-JUN-2008, sequence version 1.
DT 03-AUG-2022, entry version 74.
DE RecName: Full=Photosystem I iron-sulfur center {ECO:0000255|HAMAP-Rule:MF_01303};
DE EC=1.97.1.12 {ECO:0000255|HAMAP-Rule:MF_01303};
DE AltName: Full=9 kDa polypeptide {ECO:0000255|HAMAP-Rule:MF_01303};
DE AltName: Full=PSI-C {ECO:0000255|HAMAP-Rule:MF_01303};
DE AltName: Full=Photosystem I subunit VII {ECO:0000255|HAMAP-Rule:MF_01303};
DE AltName: Full=PsaC {ECO:0000255|HAMAP-Rule:MF_01303};
GN Name=psaC {ECO:0000255|HAMAP-Rule:MF_01303}; OrderedLocusNames=Npun_F5213;
OS Nostoc punctiforme (strain ATCC 29133 / PCC 73102).
OC Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX NCBI_TaxID=63737;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 29133 / PCC 73102;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J.,
RA Larimer F., Land M., Hauser L., Kyrpides N., Kim E., Meeks J.C., Elhai J.,
RA Campbell E.L., Thiel T., Longmire J., Potts M., Atlas R.;
RT "Complete sequence of chromosome of Nostoc punctiforme ATCC 29133.";
RL Submitted (APR-2008) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Apoprotein for the two 4Fe-4S centers FA and FB of
CC photosystem I (PSI); essential for photochemical activity. FB is the
CC terminal electron acceptor of PSI, donating electrons to ferredoxin.
CC The C-terminus interacts with PsaA/B/D and helps assemble the protein
CC into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI
CC is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting
CC photonic excitation into a charge separation, which transfers an
CC electron from the donor P700 chlorophyll pair to the spectroscopically
CC characterized acceptors A0, A1, FX, FA and FB in turn.
CC {ECO:0000255|HAMAP-Rule:MF_01303}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=hnu + oxidized [2Fe-2S]-[ferredoxin] + reduced [plastocyanin]
CC = oxidized [plastocyanin] + reduced [2Fe-2S]-[ferredoxin];
CC Xref=Rhea:RHEA:30407, Rhea:RHEA-COMP:10000, Rhea:RHEA-COMP:10001,
CC Rhea:RHEA-COMP:10039, Rhea:RHEA-COMP:10040, ChEBI:CHEBI:29036,
CC ChEBI:CHEBI:30212, ChEBI:CHEBI:33737, ChEBI:CHEBI:33738,
CC ChEBI:CHEBI:49552; EC=1.97.1.12; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01303};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01303};
CC Note=Binds 2 [4Fe-4S] clusters. Cluster 2 is most probably the
CC spectroscopically characterized electron acceptor FA and cluster 1 is
CC most probably FB. {ECO:0000255|HAMAP-Rule:MF_01303};
CC -!- SUBUNIT: The cyanobacterial PSI reaction center is composed of one copy
CC each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric complexes.
CC {ECO:0000255|HAMAP-Rule:MF_01303}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_01303}; Peripheral membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_01303}; Cytoplasmic side {ECO:0000255|HAMAP-Rule:MF_01303}.
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DR EMBL; CP001037; ACC83543.1; -; Genomic_DNA.
DR RefSeq; WP_012411495.1; NC_010628.1.
DR AlphaFoldDB; B2J393; -.
DR SMR; B2J393; -.
DR STRING; 63737.Npun_F5213; -.
DR EnsemblBacteria; ACC83543; ACC83543; Npun_F5213.
DR GeneID; 57097959; -.
DR KEGG; npu:Npun_F5213; -.
DR eggNOG; COG1143; Bacteria.
DR HOGENOM; CLU_139698_8_0_3; -.
DR OMA; GHMSHAV; -.
DR OrthoDB; 1873445at2; -.
DR PhylomeDB; B2J393; -.
DR Proteomes; UP000001191; Chromosome.
DR GO; GO:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR GO; GO:0031676; C:plasma membrane-derived 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 3: Inferred from homology;
KW 4Fe-4S; Electron transport; Iron; Iron-sulfur; Membrane; Metal-binding;
KW Oxidoreductase; Photosynthesis; Photosystem I; Reference proteome; Repeat;
KW Thylakoid; Transport.
FT CHAIN 1..81
FT /note="Photosystem I iron-sulfur center"
FT /id="PRO_1000140646"
FT DOMAIN 1..31
FT /note="4Fe-4S ferredoxin-type 1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT DOMAIN 39..68
FT /note="4Fe-4S ferredoxin-type 2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 11
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 14
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 17
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 21
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 48
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 51
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 54
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
FT BINDING 58
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01303"
SQ SEQUENCE 81 AA; 8830 MW; 52B29CEB30E3115E CRC64;
MSHTVKIYDT CIGCTQCVRA CPTDVLEMVP WDGCKAAQIA SSPRTEDCVG CKRCETACPT
DFLSIRVYLG AETTRSMGLA Y
