ID A0R4B5_MYCS2 Unreviewed; 389 AA.
AC A0R4B5;
DT 09-JAN-2007, integrated into UniProtKB/TrEMBL.
DT 09-JAN-2007, sequence version 1.
DT 27-MAR-2024, entry version 111.
DE RecName: Full=tRNA-dihydrouridine synthase {ECO:0000256|PIRNR:PIRNR006621};
DE EC=1.3.1.- {ECO:0000256|PIRNR:PIRNR006621};
GN OrderedLocusNames=MSMEG_5774 {ECO:0000313|EMBL:ABK76164.1};
OS Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155) (Mycobacterium
OS smegmatis).
OC Bacteria; Actinomycetota; Actinomycetes; Mycobacteriales; Mycobacteriaceae;
OC Mycolicibacterium.
OX NCBI_TaxID=246196 {ECO:0000313|EMBL:ABK76164.1, ECO:0000313|Proteomes:UP000000757};
RN [1] {ECO:0000313|EMBL:ABK76164.1, ECO:0000313|Proteomes:UP000000757}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700084 / mc(2)155 {ECO:0000313|Proteomes:UP000000757};
RA Fleischmann R.D., Dodson R.J., Haft D.H., Merkel J.S., Nelson W.C.,
RA Fraser C.M.;
RL Submitted (OCT-2006) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the synthesis of 5,6-dihydrouridine (D), a modified
CC base found in the D-loop of most tRNAs, via the reduction of the C5-C6
CC double bond in target uridines. {ECO:0000256|ARBA:ARBA00002790,
CC ECO:0000256|PIRNR:PIRNR006621}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5,6-dihydrouridine in tRNA + NAD(+) = a uridine in tRNA +
CC H(+) + NADH; Xref=Rhea:RHEA:54452, Rhea:RHEA-COMP:13339, Rhea:RHEA-
CC COMP:13887, ChEBI:CHEBI:15378, ChEBI:CHEBI:57540, ChEBI:CHEBI:57945,
CC ChEBI:CHEBI:65315, ChEBI:CHEBI:74443;
CC Evidence={ECO:0000256|ARBA:ARBA00001387};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5,6-dihydrouridine in tRNA + NADP(+) = a uridine in tRNA +
CC H(+) + NADPH; Xref=Rhea:RHEA:23624, Rhea:RHEA-COMP:13339, Rhea:RHEA-
CC COMP:13887, ChEBI:CHEBI:15378, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC ChEBI:CHEBI:65315, ChEBI:CHEBI:74443;
CC Evidence={ECO:0000256|ARBA:ARBA00001183};
CC -!- COFACTOR:
CC Name=FMN; Xref=ChEBI:CHEBI:58210;
CC Evidence={ECO:0000256|ARBA:ARBA00001917,
CC ECO:0000256|PIRNR:PIRNR006621};
CC -!- SIMILARITY: Belongs to the dus family. {ECO:0000256|PIRNR:PIRNR006621}.
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DR EMBL; CP000480; ABK76164.1; -; Genomic_DNA.
DR RefSeq; YP_890003.1; NC_008596.1.
DR AlphaFoldDB; A0R4B5; -.
DR STRING; 246196.MSMEG_5774; -.
DR PaxDb; 246196-MSMEI_5620; -.
DR KEGG; msm:MSMEG_5774; -.
DR PATRIC; fig|246196.19.peg.5620; -.
DR eggNOG; COG0042; Bacteria.
DR OrthoDB; 9764501at2; -.
DR Proteomes; UP000000757; Chromosome.
DR GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR GO; GO:0017150; F:tRNA dihydrouridine synthase activity; IEA:InterPro.
DR CDD; cd02801; DUS_like_FMN; 1.
DR Gene3D; 3.20.20.70; Aldolase class I; 1.
DR InterPro; IPR013785; Aldolase_TIM.
DR InterPro; IPR035587; DUS-like_FMN-bd.
DR InterPro; IPR001269; DUS_fam.
DR InterPro; IPR004652; DusB-like.
DR InterPro; IPR024036; tRNA-dHydroUridine_Synthase_C.
DR InterPro; IPR018517; tRNA_hU_synthase_CS.
DR NCBIfam; TIGR00737; nifR3_yhdG; 1.
DR PANTHER; PTHR45846; TRNA-DIHYDROURIDINE(47) SYNTHASE [NAD(P)(+)]-LIKE; 1.
DR PANTHER; PTHR45846:SF1; TRNA-DIHYDROURIDINE(47) SYNTHASE [NAD(P)(+)]-LIKE; 1.
DR Pfam; PF01207; Dus; 1.
DR PIRSF; PIRSF006621; Dus; 1.
DR SUPFAM; SSF51395; FMN-linked oxidoreductases; 1.
DR PROSITE; PS01136; UPF0034; 1.
PE 3: Inferred from homology;
KW Flavoprotein {ECO:0000256|ARBA:ARBA00022630,
KW ECO:0000256|PIRNR:PIRNR006621};
KW FMN {ECO:0000256|ARBA:ARBA00022643, ECO:0000256|PIRNR:PIRNR006621};
KW NADP {ECO:0000256|ARBA:ARBA00022857};
KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002,
KW ECO:0000256|PIRNR:PIRNR006621};
KW Reference proteome {ECO:0000313|Proteomes:UP000000757};
KW RNA-binding {ECO:0000256|ARBA:ARBA00022884};
KW tRNA processing {ECO:0000256|ARBA:ARBA00022694,
KW ECO:0000256|PIRNR:PIRNR006621}.
FT DOMAIN 26..340
FT /note="DUS-like FMN-binding"
FT /evidence="ECO:0000259|Pfam:PF01207"
FT REGION 339..389
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 120
FT /note="Proton donor"
FT /evidence="ECO:0000256|PIRSR:PIRSR006621-1"
SQ SEQUENCE 389 AA; 41700 MW; 956BE80AD086EFCA CRC64;
MSLTALDPAR SALQIGSIAL HSPVVLAPMA GVTNVAFRTL CRELEIARAG TVSGLYVCEM
VTARALVERH PVTMHMTTFA PEESPRSLQL YTVDPENTYK AAKMIVDEDL ADHIDMNFGC
PVPKVTKRGG GAALPYKRRL FGQIVAAAVR ATEGTDIPVT VKFRIGIDDE HHTHLDAGRI
AAEEGAAAVA LHARTAAQRY SGTADWEQIA ALKAHVTGIP VLGNGDIFEA DDALAMMAAT
GCDGVVIGRG CLGRPWLFAE LSAAFNNRPI PTPPTLGEVA DIVRRHGELL SRHFGEDKGM
RDIRKHVAWY LHGFPAGADL RRALALVKTR RELDELLDQL DRDAPFPPAA TGPRGRQGSA
SSVHLPEGWL DDPDDCAVPV GADVMHSGG
//
