Annotations: 3ONP

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Lipocalin	e3onpA1	A: a/b three-layered sandwiches	X: Retrovirus capsid protein	H: Retrovirus capsid protein N-terminal domain	T: PTS-regulatory domain, PRD	F: Lipocalin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.1280.10	Alpha Beta	3-Layer(aba) Sandwich	Alpha/beta knot	SPOUT methyltransferase, trefoil knot domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00588	SpoU rRNA Methylase family (SpoU_methylase)	SpoU rRNA Methylase family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	tRNA/rRNA methyltransferase (SpoU)	tRNA methyltransferase activity RNA methyltransferase activity catalytic activity, acting on RNA tRNA (cytidine) methyltransferase activity transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid tRNA (uridine) methyltransferase activity catalytic activity, acting on a tRNA transferase activity S-adenosylmethionine-dependent methyltransferase activity tRNA (cytidine(32)/uridine(32)-2'-O-ribose)-methyltransferase activity methyltransferase activity catalytic activity RNA binding tRNA methyltransferase activity RNA methyltransferase activity catalytic activity, acting on RNA tRNA (cytidine) methyltransferase activity transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid tRNA (uridine) methyltransferase activity catalytic activity, acting on a tRNA transferase activity S-adenosylmethionine-dependent methyltransferase activity tRNA (cytidine(32)/uridine(32)-2'-O-ribose)-methyltransferase activity methyltransferase activity catalytic activity RNA binding binding nucleic acid binding tRNA (cytidine(32)-2'-O-ribose)-methyltransferase activity	RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process tRNA processing RNA processing tRNA modification primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process macromolecule methylation tRNA metabolic process RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process tRNA processing RNA processing tRNA modification primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process macromolecule methylation tRNA metabolic process tRNA nucleoside ribose methylation RNA modification biosynthetic process methylation macromolecule modification metabolic process cellular process macromolecule metabolic process RNA methylation tRNA methylation	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004384	RNA methyltransferase TrmJ/LasT	Family
A	IPR001537	tRNA/rRNA methyltransferase, SpoU type	Domain
A	IPR029026	tRNA (guanine-N1-)-methyltransferase, N-terminal	Homologous Superfamily
A	IPR029028	Alpha/beta knot methyltransferases	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.