Annotations: 3CTA

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3ctaa1	All alpha proteins	DNA/RNA-binding 3-helical bundle	'Winged helix' DNA-binding domain	MarR-like transcriptional regulators	Ta1064 (RFK), N-terminal domain	(Thermoplasma acidophilum DSM 1728 ) [TaxId: 273075 ],	SCOPe (2.08)
A	d3ctaa2	All beta proteins	Reductase/isomerase/elongation factor common domain	Riboflavin kinase-like	CTP-dependent riboflavin kinase-like	CTP-dependent riboflavin kinase, Rfk	(Thermoplasma acidophilum DSM 1728 ) [TaxId: 273075 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	MarR-like transcriptional regulators	8003229	4000246	SCOP2 (2022-06-29)
A	SCOP2 Family	CTP-dependent riboflavin kinase-like	8003226	4000265	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Winged helix DNA-binding domain	8017611	3000034	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Riboflavin kinase-like	8003227	3000067	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	CTP-dep_RFKase	e3ctaA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: CTP-dep_RFKase	ECOD (1.6)
A	Fe_dep_repress_1	e3ctaA2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: Fe_dep_repress_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
A	2.40.30.30	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01982	Domain of unknown function DUF120 (CTP-dep_RFKase)	Domain of unknown function DUF120	-	Family
A	PF13545	Crp-like helix-turn-helix domain (HTH_Crp_2)	Crp-like helix-turn-helix domain	This family represents a crp-like helix-turn-helix domain that is likely to bind DNA.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Riboflavin kinase	DNA binding binding organic cyclic compound binding nucleic acid binding riboflavin kinase activity kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding DNA binding binding organic cyclic compound binding nucleic acid binding riboflavin kinase activity kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding cation binding ion binding metal ion binding	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process cellular process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process phosphorylation phosphate-containing compound metabolic process phosphorus metabolic process ribose phosphate metabolic process nucleotide biosynthetic process flavin-containing compound metabolic process organonitrogen compound biosynthetic process carbohydrate derivative metabolic process ribonucleotide biosynthetic process ribonucleotide metabolic process ribonucleoside monophosphate metabolic process nucleobase-containing small molecule metabolic process small molecule metabolic process FMN metabolic process ribose phosphate biosynthetic process nucleoside monophosphate metabolic process nucleoside phosphate metabolic process carbohydrate derivative biosynthetic process organonitrogen compound metabolic process nucleotide metabolic process nucleoside monophosphate biosynthetic process flavin-containing compound biosynthetic process FMN biosynthetic process organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process ribonucleoside monophosphate biosynthetic process water-soluble vitamin biosynthetic process small molecule biosynthetic process vitamin biosynthetic process riboflavin biosynthetic process vitamin metabolic process water-soluble vitamin metabolic process riboflavin metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR023465	Riboflavin kinase domain superfamily	Homologous Superfamily
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A	IPR012318	Crp-type HTH domain	Domain
A	IPR023602	Riboflavin kinase domain, CTP-dependent	Domain
A	IPR039063	Riboflavin kinase, CTP-dependent	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.