ID   MCR1_CHAGB              Reviewed;         348 AA.
AC   Q2HG02;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2006, sequence version 1.
DT   03-AUG-2022, entry version 70.
DE   RecName: Full=NADH-cytochrome b5 reductase 2;
DE            EC=1.6.2.2;
DE   AltName: Full=Mitochondrial cytochrome b reductase;
GN   Name=MCR1; ORFNames=CHGG_00852;
OS   Chaetomium globosum (strain ATCC 6205 / CBS 148.51 / DSM 1962 / NBRC 6347 /
OS   NRRL 1970) (Soil fungus).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Sordariomycetes;
OC   Sordariomycetidae; Sordariales; Chaetomiaceae; Chaetomium.
OX   NCBI_TaxID=306901;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 6205 / CBS 148.51 / DSM 1962 / NBRC 6347 / NRRL 1970;
RX   PubMed=25720678; DOI=10.1128/genomea.00021-15;
RA   Cuomo C.A., Untereiner W.A., Ma L.-J., Grabherr M., Birren B.W.;
RT   "Draft genome sequence of the cellulolytic fungus Chaetomium globosum.";
RL   Genome Announc. 3:E0002115-E0002115(2015).
CC   -!- FUNCTION: May mediate the reduction of outer membrane cytochrome b5.
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 Fe(III)-[cytochrome b5] + NADH = 2 Fe(II)-[cytochrome b5] +
CC         H(+) + NAD(+); Xref=Rhea:RHEA:46680, Rhea:RHEA-COMP:10438, Rhea:RHEA-
CC         COMP:10439, ChEBI:CHEBI:15378, ChEBI:CHEBI:29033, ChEBI:CHEBI:29034,
CC         ChEBI:CHEBI:57540, ChEBI:CHEBI:57945; EC=1.6.2.2;
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692; Evidence={ECO:0000250};
CC   -!- SUBCELLULAR LOCATION: Mitochondrion outer membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the flavoprotein pyridine nucleotide cytochrome
CC       reductase family. {ECO:0000305}.
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DR   EMBL; CH408029; EAQ92617.1; -; Genomic_DNA.
DR   RefSeq; XP_001220073.1; XM_001220072.1.
DR   AlphaFoldDB; Q2HG02; -.
DR   SMR; Q2HG02; -.
DR   STRING; 38033.XP_001220073.1; -.
DR   PRIDE; Q2HG02; -.
DR   EnsemblFungi; EAQ92617; EAQ92617; CHGG_00852.
DR   GeneID; 4388100; -.
DR   eggNOG; KOG0534; Eukaryota.
DR   HOGENOM; CLU_003827_9_1_1; -.
DR   InParanoid; Q2HG02; -.
DR   OMA; NKHDHIA; -.
DR   OrthoDB; 1311668at2759; -.
DR   Proteomes; UP000001056; Unassembled WGS sequence.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005741; C:mitochondrial outer membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004128; F:cytochrome-b5 reductase activity, acting on NAD(P)H; IEA:UniProtKB-EC.
DR   Gene3D; 3.40.50.80; -; 1.
DR   InterPro; IPR001834; CBR-like.
DR   InterPro; IPR008333; Cbr1-like_FAD-bd_dom.
DR   InterPro; IPR017927; FAD-bd_FR_type.
DR   InterPro; IPR001709; Flavoprot_Pyr_Nucl_cyt_Rdtase.
DR   InterPro; IPR039261; FNR_nucleotide-bd.
DR   InterPro; IPR001433; OxRdtase_FAD/NAD-bd.
DR   InterPro; IPR017938; Riboflavin_synthase-like_b-brl.
DR   PANTHER; PTHR19370; PTHR19370; 1.
DR   Pfam; PF00970; FAD_binding_6; 1.
DR   Pfam; PF00175; NAD_binding_1; 1.
DR   PRINTS; PR00371; FPNCR.
DR   SUPFAM; SSF52343; SSF52343; 1.
DR   SUPFAM; SSF63380; SSF63380; 1.
DR   PROSITE; PS51384; FAD_FR; 1.
PE   3: Inferred from homology;
KW   FAD; Flavoprotein; Membrane; Mitochondrion; Mitochondrion outer membrane;
KW   NAD; Oxidoreductase; Reference proteome; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..348
FT                   /note="NADH-cytochrome b5 reductase 2"
FT                   /id="PRO_0000330178"
FT   TRANSMEM        41..61
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   DOMAIN          97..202
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00716"
FT   BINDING         205..240
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   348 AA;  38131 MW;  812F98E27939A0E7 CRC64;
     MSLFVASRSA FRAAAPLKRQ FQIRRYATEP PSADAKKGNN TLLYGAAAAA VAGAGYYFLG
     GTPAAKKAEE KVKDASSAAA GKLSTSEVKQ ALTGGEQGWV SLKLEEVEIV NHNSKRLRFR
     LPEDDMVSGV HVASAILTKF KPVDAEKPVI RPYTPTNDED ARGYLDLLVK KYPNGPMSTH
     LHDMVPGQRL DVKGPLPKYP WTANKHGHIA LVAGGTGITP MFQLCRAIFN NPDDQTKVTL
     VFGNVREDDI LLKKELAALE NNNPRRFRAF YVLDDPPKHW TGGKGFITKD LLKTVLPEPK
     DENIKVFVCG PPGMMDAISG NKKSPKDQGE LKGILKELGY SPEQVYKF