QCRC_MYCTO
ID QCRC_MYCTO Reviewed; 280 AA.
AC P9WP34; L0TBS3; P63887; Q10386;
DT 16-APR-2014, integrated into UniProtKB/Swiss-Prot.
DT 16-APR-2014, sequence version 1.
DT 03-AUG-2022, entry version 42.
DE RecName: Full=Cytochrome bc1 complex cytochrome c subunit;
DE EC=7.1.1.8 {ECO:0000250|UniProtKB:P9WP35};
DE AltName: Full=Cytochrome bc1 reductase complex subunit QcrC;
DE AltName: Full=Ubiquinol--cytochrome c reductase cytochrome c subunit;
GN Name=qcrC; OrderedLocusNames=MT2250;
OS Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycobacterium; Mycobacterium tuberculosis complex.
OX NCBI_TaxID=83331;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CDC 1551 / Oshkosh;
RX PubMed=12218036; DOI=10.1128/jb.184.19.5479-5490.2002;
RA Fleischmann R.D., Alland D., Eisen J.A., Carpenter L., White O.,
RA Peterson J.D., DeBoy R.T., Dodson R.J., Gwinn M.L., Haft D.H., Hickey E.K.,
RA Kolonay J.F., Nelson W.C., Umayam L.A., Ermolaeva M.D., Salzberg S.L.,
RA Delcher A., Utterback T.R., Weidman J.F., Khouri H.M., Gill J., Mikula A.,
RA Bishai W., Jacobs W.R. Jr., Venter J.C., Fraser C.M.;
RT "Whole-genome comparison of Mycobacterium tuberculosis clinical and
RT laboratory strains.";
RL J. Bacteriol. 184:5479-5490(2002).
CC -!- FUNCTION: Cytochrome b subunit of the cytochrome bc1 complex, an
CC essential component of the respiratory electron transport chain
CC required for ATP synthesis. The bc1 complex catalyzes the oxidation of
CC ubiquinol and the reduction of cytochrome c in the respiratory chain.
CC The bc1 complex operates through a Q-cycle mechanism that couples
CC electron transfer to generation of the proton gradient that drives ATP
CC synthesis. {ECO:0000250|UniProtKB:P9WP35}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a quinol + 2 Fe(III)-[cytochrome c](out) = a quinone + 2
CC Fe(II)-[cytochrome c](out) + 2 H(+)(out); Xref=Rhea:RHEA:11484,
CC Rhea:RHEA-COMP:10350, Rhea:RHEA-COMP:14399, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:24646, ChEBI:CHEBI:29033, ChEBI:CHEBI:29034,
CC ChEBI:CHEBI:132124; EC=7.1.1.8;
CC Evidence={ECO:0000250|UniProtKB:P9WP35};
CC -!- SUBUNIT: The cytochrome bc1 complex is composed of a cytochrome b
CC (QcrB), the Rieske iron-sulfur protein (QcrA) and a diheme cytochrome c
CC (QcrC) subunit. {ECO:0000250|UniProtKB:P9WP35}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255}; Multi-pass membrane
CC protein {ECO:0000255}.
CC -!- PTM: Binds 2 heme c groups covalently per subunit.
CC {ECO:0000250|UniProtKB:Q8NNK5}.
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DR EMBL; AE000516; AAK46536.1; -; Genomic_DNA.
DR PIR; C70784; C70784.
DR RefSeq; WP_003411392.1; NZ_KK341227.1.
DR AlphaFoldDB; P9WP34; -.
DR SMR; P9WP34; -.
DR EnsemblBacteria; AAK46536; AAK46536; MT2250.
DR GeneID; 45426170; -.
DR KEGG; mtc:MT2250; -.
DR PATRIC; fig|83331.31.peg.2425; -.
DR HOGENOM; CLU_086567_0_0_11; -.
DR Proteomes; UP000001020; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW.
DR GO; GO:0020037; F:heme binding; IEA:InterPro.
DR GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR GO; GO:0008121; F:ubiquinol-cytochrome-c reductase activity; IEA:UniProtKB-EC.
DR Gene3D; 1.10.760.10; -; 2.
DR InterPro; IPR009152; bc1_cytC-su.
DR InterPro; IPR009056; Cyt_c-like_dom.
DR InterPro; IPR036909; Cyt_c-like_dom_sf.
DR Pfam; PF00034; Cytochrom_C; 1.
DR Pfam; PF13442; Cytochrome_CBB3; 1.
DR PIRSF; PIRSF000007; Ubiq_cycred_cyc; 1.
DR SUPFAM; SSF46626; SSF46626; 2.
DR PROSITE; PS51007; CYTC; 2.
PE 3: Inferred from homology;
KW Cell membrane; Electron transport; Heme; Iron; Membrane; Metal-binding;
KW Repeat; Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW Transport.
FT CHAIN 1..280
FT /note="Cytochrome bc1 complex cytochrome c subunit"
FT /id="PRO_0000427021"
FT TRANSMEM 25..45
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 258..278
FT /note="Helical"
FT /evidence="ECO:0000255"
FT DOMAIN 60..140
FT /note="Cytochrome c 1"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT DOMAIN 161..239
FT /note="Cytochrome c 2"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 73
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="1"
FT /note="covalent"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 76
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="1"
FT /note="covalent"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 77
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="1"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 174
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="2"
FT /note="covalent"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 177
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="2"
FT /note="covalent"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
FT BINDING 178
FT /ligand="heme c"
FT /ligand_id="ChEBI:CHEBI:61717"
FT /ligand_label="2"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00433"
SQ SEQUENCE 280 AA; 29138 MW; 7A058AE7E12EF713 CRC64;
MTKLGFTRSG GSKSGRTRRR LRRRLSGGVL LLIALTIAGG LAAVLTPTPQ VAVADESSSA
LLRTGKQLFD TSCVSCHGAN LQGVPDHGPS LIGVGEAAVY FQVSTGRMPA MRGEAQAPRK
DPIFDEAQID AIGAYVQANG GGPTVVRNPD GSIATQSLRG NDLGRGGDLF RLNCASCHNF
TGKGGALSSG KYAPDLAPAN EQQILTAMLT GPQNMPKFSN RQLSFEAKKD IIAYVKVATE
ARQPGGYLLG GFGPAPEGMA MWIIGMVAAI GLALWIGARS
