Annotations: 4YCP

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DHO_dh	e4ycpA1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: DHO_dh	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.70	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Aldolase class I	CATH (4.3.0)
A	1.20.225.30	Mainly Alpha	Up-down Bundle	Bacteriocin As-48	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01207	Dihydrouridine synthase (Dus) (Dus)	Dihydrouridine synthase (Dus)	Members of this family catalyse the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archae. Most dihydrouridines are found in the ...	Members of this family catalyse the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archae. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. Dus 1 (Swiss:Q9HGN6) from Saccharomyces cerevisiae acts on pre-tRNA-Phe, while Dus 2 (Swiss:P53720) acts on pre-tRNA-Tyr and pre-tRNA-Leu. Dus 1 is active as a single subunit, requiring NADPH or NADH, and is stimulated by the presence of FAD [1]. Some family members may be targeted to the mitochondria and even have a role in mitochondria [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	tRNA-dihydrouridine synthase C	oxidoreductase activity oxidoreductase activity, acting on the CH-CH group of donors, NAD or NADP as acceptor catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid tRNA-dihydrouridine16 synthase activity catalytic activity, acting on a tRNA RNA dihydrouridine synthase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity tRNA dihydrouridine synthase activity FMN binding binding nucleoside phosphate binding ion binding oxidoreductase activity oxidoreductase activity, acting on the CH-CH group of donors, NAD or NADP as acceptor catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid tRNA-dihydrouridine16 synthase activity catalytic activity, acting on a tRNA RNA dihydrouridine synthase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity tRNA dihydrouridine synthase activity FMN binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding RNA binding tRNA binding nucleic acid binding flavin adenine dinucleotide binding	tRNA modification RNA metabolic process primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process tRNA dihydrouridine synthesis nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process RNA modification biosynthetic process tRNA processing tRNA modification RNA metabolic process primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process tRNA dihydrouridine synthesis nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process RNA modification biosynthetic process tRNA processing macromolecule modification metabolic process cellular process macromolecule metabolic process RNA processing	-
B	tRNATrp	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001269	tRNA-dihydrouridine synthase	Family
A	IPR018517	tRNA-dihydrouridine synthase, conserved site	Conserved Site
A	IPR035587	DUS-like, FMN-binding domain	Domain
A	IPR042270	tRNA-dihydrouridine(16) synthase, C-terminal	Homologous Superfamily
A	IPR032886	tRNA-dihydrouridine(16) synthase	Family
A	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.