AC MF_01303; DC Protein; auto TR HAMAP; MF_01303; -; 1; level=0 XX Names: PSI_PsaC XX ID PSAC 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; XX case or and not 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. end case case and 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-ferredoxin oxidoreductase, converting photonic CC excitation into a charge separation, which transfers an electron from CC the donor P700 chlorophyll pair to the spectroscopically characterized CC acceptors A0, A1, FX, FA and FB in turn. end case 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; 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 is CC most probably FB.; case CC -!- SUBUNIT: The eukaryotic PSI reaction center is composed of at least 11 CC subunits. CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane; CC Peripheral membrane protein; Stromal side. else case 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 -!- SUBCELLULAR LOCATION: Cell inner membrane; Peripheral membrane protein; CC Cytoplasmic side. else 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 -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane CC protein; Cytoplasmic side. end case XX DR Pfam; PF00037; Fer4; 2; trigger=no DR PRINTS; PR00353; 4FE4SFRDOXIN; 2; trigger=no DR PROSITE; PS00198; 4FE4S_FER_1; 2; trigger=no DR PROSITE; PS51379; 4FE4S_FER_2; 2; trigger=yes DR NCBIfam; TIGR03048; PS_I_psaC; 1; trigger=no XX KW 4Fe-4S KW Electron transport KW Iron KW Iron-sulfur KW Membrane KW Metal-binding KW Photosynthesis KW Photosystem I KW Repeat KW Transport KW Oxidoreductase case KW Cell membrane KW Cell inner membrane else KW Thylakoid end case XX GO GO:0009055; F:electron transfer activity GO GO:0015979; P:photosynthesis case GO GO:0009535; C:chloroplast thylakoid membrane else case GO GO:0005886; C:plasma membrane else GO GO:0042651; C:thylakoid membrane end case XX FT From: PSAC_THEVB (P0A415) FT BINDING 11 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="1" FT Condition: C FT BINDING 14 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="1" FT Condition: C FT BINDING 17 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="1" FT Condition: C FT BINDING 21 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="2" FT Condition: C FT BINDING 48 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="2" FT Condition: C FT BINDING 51 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="2" FT Condition: C FT BINDING 54 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="2" FT Condition: C FT BINDING 58 FT /ligand="[4Fe-4S] cluster" FT /ligand_id="ChEBI:CHEBI:49883" FT /ligand_label="1" FT Condition: C XX Size: 81-93; Related: None; Template: Q00914; P0A411; P0A415; P0A416; P31087; P31085; P32422; Scope: Bacteria; Cyanobacteriota Plastid Fusion: Nter: None Cter: None Duplicate: None Plasmid: None Comments: None XX # Revision 1.57 2023/06/01 //