ID   PETL_PHATC              Reviewed;          31 AA.
AC   A0T0A1;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   09-JAN-2007, sequence version 1.
DT   25-MAY-2022, entry version 42.
DE   RecName: Full=Cytochrome b6-f complex subunit 6 {ECO:0000255|HAMAP-Rule:MF_00433};
DE   AltName: Full=Cytochrome b6-f complex subunit PetL {ECO:0000255|HAMAP-Rule:MF_00433};
DE   AltName: Full=Cytochrome b6-f complex subunit VI {ECO:0000255|HAMAP-Rule:MF_00433};
GN   Name=petL {ECO:0000255|HAMAP-Rule:MF_00433};
OS   Phaeodactylum tricornutum (strain CCAP 1055/1).
OG   Plastid; Chloroplast.
OC   Eukaryota; Sar; Stramenopiles; Ochrophyta; Bacillariophyta;
OC   Bacillariophyceae; Bacillariophycidae; Naviculales; Phaeodactylaceae;
OC   Phaeodactylum.
OX   NCBI_TaxID=556484;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCAP 1055/1;
RX   PubMed=17252281; DOI=10.1007/s00438-006-0199-4;
RA   Oudot-Le Secq M.-P., Grimwood J., Shapiro H., Armbrust E.V., Bowler C.,
RA   Green B.R.;
RT   "Chloroplast genomes of the diatoms Phaeodactylum tricornutum and
RT   Thalassiosira pseudonana: comparison with other plastid genomes of the red
RT   lineage.";
RL   Mol. Genet. Genomics 277:427-439(2007).
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. PetL is
CC       important for photoautotrophic growth as well as for electron transfer
CC       efficiency and stability of the cytochrome b6-f complex.
CC       {ECO:0000255|HAMAP-Rule:MF_00433}.
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_00433}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_00433}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_00433}.
CC   -!- SIMILARITY: Belongs to the PetL family. {ECO:0000255|HAMAP-
CC       Rule:MF_00433}.
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DR   EMBL; EF067920; ABK20590.1; -; Genomic_DNA.
DR   RefSeq; YP_874367.1; NC_008588.1.
DR   AlphaFoldDB; A0T0A1; -.
DR   SMR; A0T0A1; -.
DR   GeneID; 4524569; -.
DR   InParanoid; A0T0A1; -.
DR   Proteomes; UP000000759; Chloroplast.
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:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   HAMAP; MF_00433; Cytb6_f_PetL; 1.
DR   InterPro; IPR007802; Cyt_b6/f_cplx_su6.
DR   Pfam; PF05115; PetL; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Electron transport; Membrane; Photosynthesis; Plastid;
KW   Reference proteome; Thylakoid; Transmembrane; Transmembrane helix;
KW   Transport.
FT   CHAIN           1..31
FT                   /note="Cytochrome b6-f complex subunit 6"
FT                   /id="PRO_0000275539"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00433"
SQ   SEQUENCE   31 AA;  3420 MW;  A939952A95D67E6E CRC64;
     MTVAIDYFLL VGFCFAVTSG LWIGLKSIKL I