ID H0EHF1_GLAL7 Unreviewed; 668 AA.
AC H0EHF1;
DT 22-FEB-2012, integrated into UniProtKB/TrEMBL.
DT 22-FEB-2012, sequence version 1.
DT 27-MAR-2024, entry version 46.
DE RecName: Full=NADH-cytochrome b5 reductase 1 {ECO:0000256|ARBA:ARBA00039438};
DE EC=1.6.2.2 {ECO:0000256|ARBA:ARBA00012011};
DE AltName: Full=Microsomal cytochrome b reductase {ECO:0000256|ARBA:ARBA00041901};
GN ORFNames=M7I_1929 {ECO:0000313|EMBL:EHL01980.1};
OS Glarea lozoyensis (strain ATCC 74030 / MF5533).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Leotiomycetes;
OC Helotiales; Helotiaceae; Glarea.
OX NCBI_TaxID=1104152 {ECO:0000313|EMBL:EHL01980.1, ECO:0000313|Proteomes:UP000005446};
RN [1] {ECO:0000313|EMBL:EHL01980.1, ECO:0000313|Proteomes:UP000005446}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 74030 / MF5533 {ECO:0000313|Proteomes:UP000005446};
RX PubMed=22302591; DOI=10.1128/EC.05302-11;
RA Youssar L., Gruening B.A., Erxleben A., Guenther S., Huettel W.;
RT "Genome sequence of the fungus Glarea lozoyensis: the first genome sequence
RT of a species from the Helotiaceae family.";
RL Eukaryot. Cell 11:250-250(2012).
CC -!- FUNCTION: NADH-dependent reductase for DPH3 and cytochrome b5. Required
CC for the first step of diphthamide biosynthesis, a post-translational
CC modification of histidine which occurs in elongation factor 2. DPH1 and
CC DPH2 transfer a 3-amino-3-carboxypropyl (ACP) group from S-adenosyl-L-
CC methionine (SAM) to a histidine residue, the reaction is assisted by a
CC reduction system comprising DPH3 and a NADH-dependent reductase,
CC predominantly CBR1. By reducing DPH3, also involved in the formation of
CC the tRNA wobble base modification mcm5s 2U (5-methoxycarbonylmethyl-2-
CC thiouridine), mediated by the elongator complex. The cytochrome b5/NADH
CC cytochrome b5 reductase electron transfer system supports the catalytic
CC activity of several sterol biosynthetic enzymes.
CC {ECO:0000256|ARBA:ARBA00037104}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 Fe(3+)-[Dph3] + NADH = 2 Fe(2+)-[Dph3] + H(+) + NAD(+);
CC Xref=Rhea:RHEA:71231, Rhea:RHEA-COMP:18002, Rhea:RHEA-COMP:18003,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29033, ChEBI:CHEBI:29034,
CC ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:83228;
CC Evidence={ECO:0000256|ARBA:ARBA00036364};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:71232;
CC Evidence={ECO:0000256|ARBA:ARBA00036364};
CC -!- COFACTOR:
CC Name=FAD; Xref=ChEBI:CHEBI:57692;
CC Evidence={ECO:0000256|ARBA:ARBA00001974,
CC ECO:0000256|PIRSR:PIRSR601834-1};
CC -!- PATHWAY: Protein modification; peptidyl-diphthamide biosynthesis.
CC {ECO:0000256|ARBA:ARBA00005156}.
CC -!- SUBCELLULAR LOCATION: Mitochondrion outer membrane
CC {ECO:0000256|ARBA:ARBA00004572}; Single-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004572}.
CC -!- SIMILARITY: Belongs to the flavoprotein pyridine nucleotide cytochrome
CC reductase family. {ECO:0000256|ARBA:ARBA00006105}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EHL01980.1}.
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DR EMBL; AGUE01000040; EHL01980.1; -; Genomic_DNA.
DR AlphaFoldDB; H0EHF1; -.
DR HOGENOM; CLU_411050_0_0_1; -.
DR InParanoid; H0EHF1; -.
DR Proteomes; UP000005446; Unassembled WGS sequence.
DR GO; GO:0005741; C:mitochondrial outer membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016491; F:oxidoreductase activity; IEA:UniProtKB-KW.
DR CDD; cd06183; cyt_b5_reduct_like; 1.
DR Gene3D; 3.40.50.80; Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module; 1.
DR Gene3D; 2.40.30.10; Translation factors; 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; NADH-CYTOCHROME B5 REDUCTASE; 1.
DR PANTHER; PTHR19370:SF213; NADH-CYTOCHROME B5 REDUCTASE 1; 1.
DR Pfam; PF00970; FAD_binding_6; 1.
DR Pfam; PF00175; NAD_binding_1; 1.
DR PRINTS; PR00406; CYTB5RDTASE.
DR PRINTS; PR00371; FPNCR.
DR SUPFAM; SSF52343; Ferredoxin reductase-like, C-terminal NADP-linked domain; 1.
DR SUPFAM; SSF63380; Riboflavin synthase domain-like; 1.
DR PROSITE; PS51384; FAD_FR; 1.
PE 3: Inferred from homology;
KW FAD {ECO:0000256|ARBA:ARBA00022827, ECO:0000256|PIRSR:PIRSR601834-1};
KW Flavoprotein {ECO:0000256|ARBA:ARBA00022630, ECO:0000256|PIRSR:PIRSR601834-
KW 1}; Membrane {ECO:0000256|ARBA:ARBA00023136};
KW Mitochondrion {ECO:0000256|ARBA:ARBA00022787};
KW Mitochondrion outer membrane {ECO:0000256|ARBA:ARBA00022787};
KW NAD {ECO:0000256|ARBA:ARBA00023027};
KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002};
KW Reference proteome {ECO:0000313|Proteomes:UP000005446};
KW Transferase {ECO:0000256|ARBA:ARBA00022679}.
FT DOMAIN 62..174
FT /note="FAD-binding FR-type"
FT /evidence="ECO:0000259|PROSITE:PS51384"
FT BINDING 124
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 126
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 140
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 142
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 149
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 150
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
FT BINDING 191
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000256|PIRSR:PIRSR601834-1"
SQ SEQUENCE 668 AA; 72423 MW; 6A68713FC0CEFD24 CRC64;
MSQSPSLFSR GYIDGIYIPS GLLVFGTLIV KREWLPYAVA LAVALGTFKV WNNRVRAVLK
PAEFQDFELQ EKTIISHNVA ITDFTSYRFK LPSETAILGL PIGQHISIGA GIKQADGTSK
EIVRSYTPIS GDQPGFFDLL IKSYPTGNIS KYMASLVVGQ TIKVKGPKGA MVYTPNMVRH
FGMIAGGTGI TPMLQIIRAV IRGRPTGDTT EIDLIFANVN KEDILLKEDL DQLAAEDKGF
RVHYVLNNPP ENWEGGVGFV TPEMMTKWLP KPAEDVKMLL CGPPPMISAM KKASESLGFK
KARPSRSILT WTLVFLALPG QESPRLFTPT PSEGSVQGDY ENLEHASIED QHAKINAWKQ
TTQNFPPPEQ PSPDTQFHDT PCDLLPEYPA TYQLKTDNLP LSILAVRILI HKSLLTPSDI
QPYVYPLNSF PPTNPASLSR TTLYEHQPTD PLTGIASATL ETVTNVALGV ASIPLSSYHA
FKSSPSSDCP LKTRDASKPN PYDKAVLGAA KGVGRVVAAG LKAPMLVTTG VAGGLRNLPG
LYGEDVRRVE RVEGVVGGVK QAGVGFGTGL YDGLTGIVKK PYDGAKTEGP LGFLKGVGRG
IGGVVCKPAA GIAAYPLLGL WREVEKVGKK KDETPGLGRE EGDEEEFREE DVRVVVKGWE
EFCGKKKI
//
