PETG_GUITH
ID PETG_GUITH Reviewed; 37 AA.
AC O78505;
DT 15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1998, sequence version 1.
DT 25-MAY-2022, entry version 83.
DE RecName: Full=Cytochrome b6-f complex subunit 5 {ECO:0000255|HAMAP-Rule:MF_00432};
DE AltName: Full=Cytochrome b6-f complex subunit PetG {ECO:0000255|HAMAP-Rule:MF_00432};
DE AltName: Full=Cytochrome b6-f complex subunit V {ECO:0000255|HAMAP-Rule:MF_00432};
GN Name=petG {ECO:0000255|HAMAP-Rule:MF_00432};
OS Guillardia theta (Cryptophyte) (Cryptomonas phi).
OG Plastid; Chloroplast.
OC Eukaryota; Cryptophyceae; Pyrenomonadales; Geminigeraceae; Guillardia.
OX NCBI_TaxID=55529;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=9929392; DOI=10.1007/pl00006462;
RA Douglas S.E., Penny S.L.;
RT "The plastid genome of the cryptophyte alga, Guillardia theta: complete
RT sequence and conserved synteny groups confirm its common ancestry with red
RT algae.";
RL J. Mol. Evol. 48:236-244(1999).
CC -!- FUNCTION: Component of the cytochrome b6-f complex, which mediates
CC electron transfer between photosystem II (PSII) and photosystem I
CC (PSI), cyclic electron flow around PSI, and state transitions. PetG is
CC required for either the stability or assembly of the cytochrome b6-f
CC complex. {ECO:0000255|HAMAP-Rule:MF_00432}.
CC -!- SUBUNIT: The 4 large subunits of the cytochrome b6-f complex are
CC cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and
CC the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and
CC PetN. The complex functions as a dimer. {ECO:0000255|HAMAP-
CC Rule:MF_00432}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000255|HAMAP-Rule:MF_00432}; Single-pass membrane protein
CC {ECO:0000255|HAMAP-Rule:MF_00432}.
CC -!- SIMILARITY: Belongs to the PetG family. {ECO:0000255|HAMAP-
CC Rule:MF_00432}.
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DR EMBL; AF041468; AAC35696.1; -; Genomic_DNA.
DR RefSeq; NP_050762.1; NC_000926.1.
DR AlphaFoldDB; O78505; -.
DR SMR; O78505; -.
DR GeneID; 857070; -.
DR HOGENOM; CLU_216962_0_0_1; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0009512; C:cytochrome b6f complex; IEA:InterPro.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0045158; F:electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity; IEA:UniProtKB-UniRule.
DR GO; GO:0017004; P:cytochrome complex assembly; IEA:UniProtKB-UniRule.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR HAMAP; MF_00432; Cytb6_f_PetG; 1.
DR InterPro; IPR003683; Cyt_6/f_cplx_su5.
DR InterPro; IPR036099; Cyt_6/f_cplx_su5_sf.
DR PANTHER; PTHR35516; PTHR35516; 1.
DR Pfam; PF02529; PetG; 1.
DR PIRSF; PIRSF000034; Cyt_b6-f_V; 1.
DR SUPFAM; SSF103446; SSF103446; 1.
PE 3: Inferred from homology;
KW Chloroplast; Electron transport; Membrane; Photosynthesis; Plastid;
KW Thylakoid; Transmembrane; Transmembrane helix; Transport.
FT CHAIN 1..37
FT /note="Cytochrome b6-f complex subunit 5"
FT /id="PRO_0000216384"
FT TRANSMEM 5..25
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00432"
SQ SEQUENCE 37 AA; 4095 MW; A7877B8D125FEE15 CRC64;
MIEPLLFGIV LGLIPVTLTG LFVAAYLQYR RGNQFGL
