ID   QCR6_DICDI              Reviewed;          69 AA.
AC   Q1ZXP3;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   02-MAY-2006, sequence version 1.
DT   25-MAY-2022, entry version 88.
DE   RecName: Full=Probable cytochrome b-c1 complex subunit 6;
DE   AltName: Full=Ubiquinol-cytochrome c reductase complex subunit 6;
GN   Name=uqcrh; ORFNames=DDB_G0271774;
OS   Dictyostelium discoideum (Slime mold).
OC   Eukaryota; Amoebozoa; Evosea; Eumycetozoa; Dictyostelia; Dictyosteliales;
OC   Dictyosteliaceae; Dictyostelium.
OX   NCBI_TaxID=44689;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AX4;
RX   PubMed=12097910; DOI=10.1038/nature00847;
RA   Gloeckner G., Eichinger L., Szafranski K., Pachebat J.A., Bankier A.T.,
RA   Dear P.H., Lehmann R., Baumgart C., Parra G., Abril J.F., Guigo R.,
RA   Kumpf K., Tunggal B., Cox E.C., Quail M.A., Platzer M., Rosenthal A.,
RA   Noegel A.A.;
RT   "Sequence and analysis of chromosome 2 of Dictyostelium discoideum.";
RL   Nature 418:79-85(2002).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AX4;
RX   PubMed=15875012; DOI=10.1038/nature03481;
RA   Eichinger L., Pachebat J.A., Gloeckner G., Rajandream M.A., Sucgang R.,
RA   Berriman M., Song J., Olsen R., Szafranski K., Xu Q., Tunggal B.,
RA   Kummerfeld S., Madera M., Konfortov B.A., Rivero F., Bankier A.T.,
RA   Lehmann R., Hamlin N., Davies R., Gaudet P., Fey P., Pilcher K., Chen G.,
RA   Saunders D., Sodergren E.J., Davis P., Kerhornou A., Nie X., Hall N.,
RA   Anjard C., Hemphill L., Bason N., Farbrother P., Desany B., Just E.,
RA   Morio T., Rost R., Churcher C.M., Cooper J., Haydock S., van Driessche N.,
RA   Cronin A., Goodhead I., Muzny D.M., Mourier T., Pain A., Lu M., Harper D.,
RA   Lindsay R., Hauser H., James K.D., Quiles M., Madan Babu M., Saito T.,
RA   Buchrieser C., Wardroper A., Felder M., Thangavelu M., Johnson D.,
RA   Knights A., Loulseged H., Mungall K.L., Oliver K., Price C., Quail M.A.,
RA   Urushihara H., Hernandez J., Rabbinowitsch E., Steffen D., Sanders M.,
RA   Ma J., Kohara Y., Sharp S., Simmonds M.N., Spiegler S., Tivey A.,
RA   Sugano S., White B., Walker D., Woodward J.R., Winckler T., Tanaka Y.,
RA   Shaulsky G., Schleicher M., Weinstock G.M., Rosenthal A., Cox E.C.,
RA   Chisholm R.L., Gibbs R.A., Loomis W.F., Platzer M., Kay R.R.,
RA   Williams J.G., Dear P.H., Noegel A.A., Barrell B.G., Kuspa A.;
RT   "The genome of the social amoeba Dictyostelium discoideum.";
RL   Nature 435:43-57(2005).
CC   -!- FUNCTION: Component of the ubiquinol-cytochrome c oxidoreductase, a
CC       multisubunit transmembrane complex that is part of the mitochondrial
CC       electron transport chain which drives oxidative phosphorylation. The
CC       respiratory chain contains 3 multisubunit complexes succinate
CC       dehydrogenase (complex II, CII), ubiquinol-cytochrome c oxidoreductase
CC       (cytochrome b-c1 complex, complex III, CIII) and cytochrome c oxidase
CC       (complex IV, CIV), that cooperate to transfer electrons derived from
CC       NADH and succinate to molecular oxygen, creating an electrochemical
CC       gradient over the inner membrane that drives transmembrane transport
CC       and the ATP synthase. The cytochrome b-c1 complex catalyzes electron
CC       transfer from ubiquinol to cytochrome c, linking this redox reaction to
CC       translocation of protons across the mitochondrial inner membrane, with
CC       protons being carried across the membrane as hydrogens on the quinol.
CC       In the process called Q cycle, 2 protons are consumed from the matrix,
CC       4 protons are released into the intermembrane space and 2 electrons are
CC       passed to cytochrome c. {ECO:0000250|UniProtKB:P00127}.
CC   -!- SUBUNIT: Component of the ubiquinol-cytochrome c oxidoreductase
CC       (cytochrome b-c1 complex, complex III, CIII), a multisubunit enzyme
CC       composed of 3 respiratory subunits cytochrome b, cytochrome c1 and
CC       Rieske protein, 2 core protein subunits, and additional low-molecular
CC       weight protein subunits. The complex exists as an obligatory dimer and
CC       forms supercomplexes (SCs) in the inner mitochondrial membrane with
CC       cytochrome c oxidase (complex IV, CIV). {ECO:0000250|UniProtKB:P00127}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P00127}; Peripheral membrane protein
CC       {ECO:0000250|UniProtKB:P00127}; Intermembrane side
CC       {ECO:0000250|UniProtKB:P00127}.
CC   -!- SIMILARITY: Belongs to the UQCRH/QCR6 family. {ECO:0000305}.
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DR   EMBL; AAFI02000006; EAS66929.1; -; Genomic_DNA.
DR   RefSeq; XP_001134613.1; XM_001134613.1.
DR   AlphaFoldDB; Q1ZXP3; -.
DR   SMR; Q1ZXP3; -.
DR   STRING; 44689.DDB0233077; -.
DR   PaxDb; Q1ZXP3; -.
DR   EnsemblProtists; EAS66929; EAS66929; DDB_G0271774.
DR   GeneID; 8618155; -.
DR   KEGG; ddi:DDB_G0271774; -.
DR   dictyBase; DDB_G0271774; uqcrh.
DR   eggNOG; ENOG502RIAM; Eukaryota.
DR   HOGENOM; CLU_115913_2_1_1; -.
DR   InParanoid; Q1ZXP3; -.
DR   OMA; ISFFKYH; -.
DR   PhylomeDB; Q1ZXP3; -.
DR   Reactome; R-DDI-611105; Respiratory electron transport.
DR   PRO; PR:Q1ZXP3; -.
DR   Proteomes; UP000002195; Chromosome 2.
DR   GO; GO:0005750; C:mitochondrial respiratory chain complex III; IBA:GO_Central.
DR   GO; GO:0006122; P:mitochondrial electron transport, ubiquinol to cytochrome c; IBA:GO_Central.
DR   Gene3D; 1.10.287.20; -; 1.
DR   InterPro; IPR003422; Cyt_b-c1_6.
DR   InterPro; IPR023184; Ubol_cytC_Rdtase_hinge_dom.
DR   InterPro; IPR036811; Ubol_cytC_Rdtase_hinge_dom_sf.
DR   PANTHER; PTHR15336; PTHR15336; 1.
DR   Pfam; PF02320; UCR_hinge; 1.
DR   SUPFAM; SSF81531; SSF81531; 1.
PE   3: Inferred from homology;
KW   Disulfide bond; Electron transport; Membrane; Mitochondrion;
KW   Mitochondrion inner membrane; Reference proteome; Respiratory chain;
KW   Transport.
FT   CHAIN           1..69
FT                   /note="Probable cytochrome b-c1 complex subunit 6"
FT                   /id="PRO_0000327639"
FT   DISULFID        16..59
FT                   /evidence="ECO:0000250|UniProtKB:P00126"
FT   DISULFID        30..45
FT                   /evidence="ECO:0000250|UniProtKB:P00127"
SQ   SEQUENCE   69 AA;  7547 MW;  327AD8D4E9FCB13D CRC64;
     MQTSECKVKG PIQEGCASGC EKSWSAYQAC SGRVAKLEHD EKANCLGQFL EHVQCIDKCV
     GPKLFAQLK