ID   C5502_GLOVI             Reviewed;         166 AA.
AC   Q7NI46;
DT   24-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2003, sequence version 1.
DT   03-AUG-2022, entry version 104.
DE   RecName: Full=Cytochrome c-550 2;
DE   AltName: Full=Cytochrome c550 2;
DE   AltName: Full=Low-potential cytochrome c 2;
DE   Flags: Precursor;
GN   Name=psbV2; OrderedLocusNames=gll2338;
OS   Gloeobacter violaceus (strain ATCC 29082 / PCC 7421).
OC   Bacteria; Cyanobacteria; Gloeobacteria; Gloeobacterales; Gloeobacteraceae;
OC   Gloeobacter.
OX   NCBI_TaxID=251221;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29082 / PCC 7421;
RX   PubMed=14621292; DOI=10.1093/dnares/10.4.137;
RA   Nakamura Y., Kaneko T., Sato S., Mimuro M., Miyashita H., Tsuchiya T.,
RA   Sasamoto S., Watanabe A., Kawashima K., Kishida Y., Kiyokawa C., Kohara M.,
RA   Matsumoto M., Matsuno A., Nakazaki N., Shimpo S., Takeuchi C., Yamada M.,
RA   Tabata S.;
RT   "Complete genome structure of Gloeobacter violaceus PCC 7421, a
RT   cyanobacterium that lacks thylakoids.";
RL   DNA Res. 10:137-145(2003).
CC   -!- FUNCTION: Low-potential cytochrome c that plays a role in the oxygen-
CC       evolving complex of photosystem II. {ECO:0000305}.
CC   -!- COFACTOR:
CC       Name=heme c; Xref=ChEBI:CHEBI:61717; Evidence={ECO:0000305};
CC       Note=Binds 1 heme c group covalently per subunit. {ECO:0000305};
CC   -!- SUBUNIT: The cyanobacterial oxygen-evolving complex is composed of
CC       PsbO, PsbP, PsbQ, PsbV and PsbU. {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000250}; Peripheral
CC       membrane protein {ECO:0000250}; Periplasmic side {ECO:0000250}.
CC       Note=Associated with photosystem II at the periplasmic side of the
CC       inner membrane. {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the cytochrome c family. PsbV subfamily.
CC       {ECO:0000305}.
CC   -!- CAUTION: It is not clear which residue serves as the second axial
CC       ligand for the heme group. {ECO:0000305}.
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DR   EMBL; BA000045; BAC90279.1; -; Genomic_DNA.
DR   RefSeq; NP_925284.1; NC_005125.1.
DR   RefSeq; WP_011142334.1; NC_005125.1.
DR   AlphaFoldDB; Q7NI46; -.
DR   SMR; Q7NI46; -.
DR   STRING; 251221.35212906; -.
DR   EnsemblBacteria; BAC90279; BAC90279; BAC90279.
DR   KEGG; gvi:gll2338; -.
DR   eggNOG; COG2010; Bacteria.
DR   HOGENOM; CLU_104149_0_0_3; -.
DR   InParanoid; Q7NI46; -.
DR   OMA; GTCHAGG; -.
DR   OrthoDB; 1553768at2; -.
DR   PhylomeDB; Q7NI46; -.
DR   Proteomes; UP000000557; Chromosome.
DR   GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR   Gene3D; 1.10.760.10; -; 1.
DR   InterPro; IPR009056; Cyt_c-like_dom.
DR   InterPro; IPR036909; Cyt_c-like_dom_sf.
DR   InterPro; IPR029490; Cytochrom_C550.
DR   InterPro; IPR016003; PSII_cyt_c550.
DR   Pfam; PF14495; Cytochrom_C550; 1.
DR   PIRSF; PIRSF005890; Phot_II_cyt_c550; 1.
DR   SUPFAM; SSF46626; SSF46626; 1.
DR   PROSITE; PS51007; CYTC; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Electron transport; Heme; Iron;
KW   Membrane; Metal-binding; Photosynthesis; Photosystem II;
KW   Reference proteome; Signal; Transport.
FT   SIGNAL          1..32
FT                   /evidence="ECO:0000255"
FT   CHAIN           33..166
FT                   /note="Cytochrome c-550 2"
FT                   /id="PRO_0000295598"
FT   BINDING         71
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT   BINDING         74
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT   BINDING         75
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
SQ   SEQUENCE   166 AA;  17470 MW;  8E81186FF435ACFF CRC64;
     MFSRQFGRLA TLALALAVAG CAGGEQSTTA EAPSEPAPVA KPDVVSAATG ELSNFSTADL
     KQAKKLFQAE CGRCHVGGQT YGTYNSTDVS LSYDALTNAT PPRNTVAGLV DYMKKPTSYD
     GRTDLLKTGE HASFTGLGDE KLRLIAGHII KEATSNPNWG QGKDTR