ID   PETN_PAUCH              Reviewed;          33 AA.
AC   B1X3V8;
DT   25-NOV-2008, integrated into UniProtKB/Swiss-Prot.
DT   20-MAY-2008, sequence version 1.
DT   25-MAY-2022, entry version 42.
DE   RecName: Full=Cytochrome b6-f complex subunit 8 {ECO:0000255|HAMAP-Rule:MF_00395};
DE   AltName: Full=Cytochrome b6-f complex subunit PetN {ECO:0000255|HAMAP-Rule:MF_00395};
DE   AltName: Full=Cytochrome b6-f complex subunit VIII {ECO:0000255|HAMAP-Rule:MF_00395};
GN   Name=petN {ECO:0000255|HAMAP-Rule:MF_00395}; OrderedLocusNames=PCC_0177;
OS   Paulinella chromatophora.
OG   Plastid; Organellar chromatophore.
OC   Eukaryota; Sar; Rhizaria; Imbricatea; Silicofilosea; Euglyphida;
OC   Paulinellidae; Paulinella.
OX   NCBI_TaxID=39717;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=18356055; DOI=10.1016/j.cub.2008.02.051;
RA   Nowack E.C.M., Melkonian M., Gloeckner G.;
RT   "Chromatophore genome sequence of Paulinella sheds light on acquisition of
RT   photosynthesis by eukaryotes.";
RL   Curr. Biol. 18:410-418(2008).
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.
CC       {ECO:0000255|HAMAP-Rule:MF_00395}.
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_00395}.
CC   -!- SUBCELLULAR LOCATION: Plastid, organellar chromatophore thylakoid
CC       membrane {ECO:0000250}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_00395}.
CC   -!- SIMILARITY: Belongs to the PetN family. {ECO:0000255|HAMAP-
CC       Rule:MF_00395}.
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DR   EMBL; CP000815; ACB42627.1; -; Genomic_DNA.
DR   RefSeq; YP_002048837.1; NC_011087.1.
DR   AlphaFoldDB; B1X3V8; -.
DR   SMR; B1X3V8; -.
DR   GeneID; 6482013; -.
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:0070118; C:organellar chromatophore thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009536; C:plastid; IEA:UniProtKB-KW.
DR   GO; GO:0045158; F:electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity; IEA:InterPro.
DR   GO; GO:0017004; P:cytochrome complex assembly; IEA:UniProtKB-UniRule.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   HAMAP; MF_00395; Cytb6_f_PetN; 1.
DR   InterPro; IPR036143; Cytochr_b6-f_cplx_su8_sf.
DR   InterPro; IPR005497; Cytochrome_b6-f_cplx_su8.
DR   Pfam; PF03742; PetN; 1.
DR   SUPFAM; SSF103451; SSF103451; 1.
PE   3: Inferred from homology;
KW   Electron transport; Membrane; Organellar chromatophore; Photosynthesis;
KW   Plastid; Thylakoid; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..33
FT                   /note="Cytochrome b6-f complex subunit 8"
FT                   /id="PRO_0000355462"
FT   TRANSMEM        2..22
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00395"
SQ   SEQUENCE   33 AA;  3564 MW;  7FCB0CCF873475EB CRC64;
     MLITLGWASL AALFSFSIAM VVWGRNGDGS MNF