ID A0A0S2I0P0_9BACT Unreviewed; 345 AA.
AC A0A0S2I0P0;
DT 17-FEB-2016, integrated into UniProtKB/TrEMBL.
DT 17-FEB-2016, sequence version 1.
DT 24-JAN-2024, entry version 23.
DE RecName: Full=tRNA-dihydrouridine synthase {ECO:0000256|PIRNR:PIRNR006621};
DE EC=1.3.1.- {ECO:0000256|PIRNR:PIRNR006621};
GN Name=dus_2 {ECO:0000313|EMBL:ALO15977.1};
GN ORFNames=L21SP5_02345 {ECO:0000313|EMBL:ALO15977.1};
OS Salinivirga cyanobacteriivorans.
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Salinivirgaceae;
OC Salinivirga.
OX NCBI_TaxID=1307839 {ECO:0000313|EMBL:ALO15977.1, ECO:0000313|Proteomes:UP000064893};
RN [1] {ECO:0000313|EMBL:ALO15977.1, ECO:0000313|Proteomes:UP000064893}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=L21-Spi-D4 {ECO:0000313|EMBL:ALO15977.1,
RC ECO:0000313|Proteomes:UP000064893};
RA Spring S., Bunk B., Sproer C., Klenk H.-P.;
RT "Description and complete genome sequence of a novel strain predominating
RT in hypersaline microbial mats and representing a new family of the
RT Bacteriodetes phylum.";
RL Submitted (NOV-2015) 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; CP013118; ALO15977.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0S2I0P0; -.
DR STRING; 1307839.L21SP5_02345; -.
DR KEGG; blq:L21SP5_02345; -.
DR PATRIC; fig|1307839.3.peg.2465; -.
DR Proteomes; UP000064893; 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:UP000064893};
KW RNA-binding {ECO:0000256|ARBA:ARBA00022884};
KW tRNA processing {ECO:0000256|ARBA:ARBA00022694,
KW ECO:0000256|PIRNR:PIRNR006621}.
FT DOMAIN 16..300
FT /note="DUS-like FMN-binding"
FT /evidence="ECO:0000259|Pfam:PF01207"
FT ACT_SITE 102
FT /note="Proton donor"
FT /evidence="ECO:0000256|PIRSR:PIRSR006621-1"
SQ SEQUENCE 345 AA; 39132 MW; 6F490E57E5F96599 CRC64;
MIKIGNTELR DYPVVFAPME DVSDPPFRYM CKQFGADLMY TEFIAAEGLV RDAKKSLKKL
DIFDYERPIA IQIFGHNIDS MVGAAKMVAE VKPDIIDLNF GCPVKKVAGK GAGAGMLREP
EKMVEMTAAI VKAVDIPVTV KTRLGWDEDS KIITELAEPL QDAGIAALTI HGRTRAQFYR
GEADWTLIRE VKQNPRINIP IIGNGDIKDP VGAKRMFDEY GVDAIMIGRA VIGRPWIFKE
VRHYLDKGEF MPPLTIDDRV DMAQMHLQKS IEWKGDVYGV LEMRQHLSNY FKGLPNFKPR
RLKLLTTPEP DGVRAQLEDI RKVYKNYALD NNHLIENHCS KLEKL
//
