QCR6_NEUCR
ID QCR6_NEUCR Reviewed; 141 AA.
AC V5IM94; V5ILN4;
DT 26-FEB-2020, integrated into UniProtKB/Swiss-Prot.
DT 22-JAN-2014, sequence version 1.
DT 25-MAY-2022, entry version 40.
DE RecName: Full=Cytochrome b-c1 complex subunit 6, mitochondrial;
DE AltName: Full=Complex III subunit 6;
DE AltName: Full=Complex III subunit VI {ECO:0000303|PubMed:6302289};
DE AltName: Full=Ubiquinol-cytochrome c oxidoreductase subunit 6;
DE AltName: Full=Ubiquinol-cytochrome c reductase complex 14 kDa protein;
GN Name=qcr6; ORFNames=NCU05989;
OS Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 /
OS FGSC 987).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Sordariomycetes;
OC Sordariomycetidae; Sordariales; Sordariaceae; Neurospora.
OX NCBI_TaxID=367110;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987;
RX PubMed=12712197; DOI=10.1038/nature01554;
RA Galagan J.E., Calvo S.E., Borkovich K.A., Selker E.U., Read N.D.,
RA Jaffe D.B., FitzHugh W., Ma L.-J., Smirnov S., Purcell S., Rehman B.,
RA Elkins T., Engels R., Wang S., Nielsen C.B., Butler J., Endrizzi M.,
RA Qui D., Ianakiev P., Bell-Pedersen D., Nelson M.A., Werner-Washburne M.,
RA Selitrennikoff C.P., Kinsey J.A., Braun E.L., Zelter A., Schulte U.,
RA Kothe G.O., Jedd G., Mewes H.-W., Staben C., Marcotte E., Greenberg D.,
RA Roy A., Foley K., Naylor J., Stange-Thomann N., Barrett R., Gnerre S.,
RA Kamal M., Kamvysselis M., Mauceli E.W., Bielke C., Rudd S., Frishman D.,
RA Krystofova S., Rasmussen C., Metzenberg R.L., Perkins D.D., Kroken S.,
RA Cogoni C., Macino G., Catcheside D.E.A., Li W., Pratt R.J., Osmani S.A.,
RA DeSouza C.P.C., Glass N.L., Orbach M.J., Berglund J.A., Voelker R.,
RA Yarden O., Plamann M., Seiler S., Dunlap J.C., Radford A., Aramayo R.,
RA Natvig D.O., Alex L.A., Mannhaupt G., Ebbole D.J., Freitag M., Paulsen I.,
RA Sachs M.S., Lander E.S., Nusbaum C., Birren B.W.;
RT "The genome sequence of the filamentous fungus Neurospora crassa.";
RL Nature 422:859-868(2003).
RN [2]
RP SUBUNIT, AND SUBCELLULAR LOCATION.
RX PubMed=226365; DOI=10.1111/j.1432-1033.1979.tb13240.x;
RA Weiss H., Kolb H.J.;
RT "Isolation of mitochondrial succinate: ubiquinone reductase, cytochrome c
RT reductase and cytochrome c oxidase from Neurospora crassa using nonionic
RT detergent.";
RL Eur. J. Biochem. 99:139-149(1979).
RN [3]
RP SUBUNIT.
RX PubMed=6273583; DOI=10.1016/0022-2836(81)90301-6;
RA Leonard K., Wingfield P., Arad T., Weiss H.;
RT "Three-dimensional structure of ubiquinol:cytochrome c reductase from
RT Neurospora mitochondria determined by electron microscopy of membrane
RT crystals.";
RL J. Mol. Biol. 149:259-274(1981).
RN [4]
RP SUBUNIT.
RX PubMed=18251112; DOI=10.1007/bf00744526;
RA Mendel-Hartvig I., Nelson B.D.;
RT "Comparative study of the peptide composition of Complex III (quinol-
RT cytochrome c reductase).";
RL J. Bioenerg. Biomembr. 15:289-299(1983).
RN [5]
RP SUBUNIT.
RX PubMed=6302289; DOI=10.1016/s0022-2836(83)80258-7;
RA Karlsson B., Hovmoeller S., Weiss H., Leonard K.;
RT "Structural studies of cytochrome reductase. Subunit topography determined
RT by electron microscopy of membrane crystals of a subcomplex.";
RL J. Mol. Biol. 165:287-302(1983).
RN [6]
RP FUNCTION OF COMPLEX III.
RX PubMed=3015618; DOI=10.1111/j.1432-1033.1986.tb09799.x;
RA Linke P., Bechmann G., Gothe A., Weiss H.;
RT "Dimeric ubiquinol:cytochrome c reductase of Neurospora mitochondria
RT contains one cooperative ubiquinone-reduction centre.";
RL Eur. J. Biochem. 158:615-621(1986).
RN [7]
RP FUNCTION OF COMPLEX III.
RX PubMed=1847681; DOI=10.1111/j.1432-1033.1991.tb15722.x;
RA Bechmann G., Weiss H.;
RT "Regulation of the proton/electron stoichiometry of mitochondrial
RT ubiquinol:cytochrome c reductase by the membrane potential.";
RL Eur. J. Biochem. 195:431-438(1991).
RN [8]
RP SUBUNIT.
RX PubMed=17873079; DOI=10.1128/ec.00149-07;
RA Marques I., Dencher N.A., Videira A., Krause F.;
RT "Supramolecular organization of the respiratory chain in Neurospora crassa
RT mitochondria.";
RL Eukaryot. Cell 6:2391-2405(2007).
RN [9]
RP FUNCTION OF COMPLEX III, AND SUBUNIT.
RX PubMed=19239619; DOI=10.1111/j.1365-2958.2009.06643.x;
RA Duarte M., Videira A.;
RT "Effects of mitochondrial complex III disruption in the respiratory chain
RT of Neurospora crassa.";
RL Mol. Microbiol. 72:246-258(2009).
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:0000269|PubMed:3015618,
CC ECO:0000305|PubMed:1847681, ECO:0000305|PubMed:19239619}.
CC -!- SUBUNIT: Component of the ubiquinol-cytochrome c oxidoreductase
CC (cytochrome b-c1 complex, complex III, CIII), a multisubunit enzyme
CC composed of 10 subunits. The complex is composed of 3 respiratory
CC subunits cytochrome b (cob), cytochrome c1 (cyt-1) and Rieske protein
CC (fes-1), 2 core protein subunits pep and ucr-1, and 5 low-molecular
CC weight protein subunits qcr6, qcr7, qcr8, qcr9 and probably
CC NCU16844/qcr10 (PubMed:226365, PubMed:6273583, PubMed:18251112,
CC PubMed:6302289). The complex exists as an obligatory dimer and forms
CC supercomplexes (SCs) in the inner mitochondrial membrane with NADH-
CC ubiquinone oxidoreductase (complex I, CI) and cytochrome c oxidase
CC (complex IV, CIV), resulting in different assemblies (supercomplexes
CC SCI(1)III(2), SCIII(2)IV(1) and SCIII(2)IV(2) as well as higher order
CC I(x)III(y)IV(z) megacomplexes) (PubMed:17873079, PubMed:19239619).
CC {ECO:0000269|PubMed:17873079, ECO:0000269|PubMed:18251112,
CC ECO:0000269|PubMed:19239619, ECO:0000269|PubMed:226365,
CC ECO:0000269|PubMed:6273583, ECO:0000269|PubMed:6302289}.
CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC {ECO:0000269|PubMed:226365}; Peripheral membrane protein
CC {ECO:0000250|UniProtKB:P00127}; Intermembrane side
CC {ECO:0000250|UniProtKB:P00127}.
CC -!- ALTERNATIVE PRODUCTS:
CC Event=Alternative splicing; Named isoforms=2;
CC Name=1;
CC IsoId=V5IM94-1; Sequence=Displayed;
CC Name=2;
CC IsoId=V5IM94-2; Sequence=VSP_060522;
CC -!- SIMILARITY: Belongs to the UQCRH/QCR6 family. {ECO:0000305}.
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DR EMBL; CM002241; ESA42284.1; -; Genomic_DNA.
DR EMBL; CM002241; ESA42285.1; -; Genomic_DNA.
DR RefSeq; XP_011394985.1; XM_011396683.1. [V5IM94-1]
DR RefSeq; XP_011394986.1; XM_011396684.1. [V5IM94-2]
DR AlphaFoldDB; V5IM94; -.
DR SMR; V5IM94; -.
DR STRING; 5141.EFNCRP00000001545; -.
DR EnsemblFungi; ESA42284; ESA42284; NCU05989. [V5IM94-1]
DR EnsemblFungi; ESA42285; ESA42285; NCU05989. [V5IM94-2]
DR GeneID; 3874042; -.
DR KEGG; ncr:NCU05989; -.
DR VEuPathDB; FungiDB:NCU05989; -.
DR HOGENOM; CLU_115913_0_2_1; -.
DR Proteomes; UP000001805; Chromosome 5, Linkage Group VI.
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 1: Evidence at protein level;
KW Alternative splicing; Disulfide bond; Electron transport; Membrane;
KW Mitochondrion; Mitochondrion inner membrane; Reference proteome;
KW Respiratory chain; Transport.
FT CHAIN 1..141
FT /note="Cytochrome b-c1 complex subunit 6, mitochondrial"
FT /id="PRO_0000449192"
FT REGION 18..94
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 54..79
FT /note="Acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 80..94
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT DISULFID 102..117
FT /evidence="ECO:0000250|UniProtKB:P00127"
FT VAR_SEQ 1..31
FT /note="MGFWDAVTDLIDAATPWATVEAEAPADTPAE -> M (in isoform 2)"
FT /evidence="ECO:0000305|PubMed:12712197"
FT /id="VSP_060522"
SQ SEQUENCE 141 AA; 15443 MW; C07440609C30174B CRC64;
MGFWDAVTDL IDAATPWATV EAEAPADTPA ETAPASESTE ETTAETKAEE SAPAAEEPEE
EAEEEEEEEE DEDEIVDPKE TLEEECRNSK ECAPAKHHYD ECAARVTGAG ADNKEDCVEE
FFHLVHCATQ CAAPKLWNTL K
