Annotations: 4XBO

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	SpoU_methylase	e4xboB1	A: a/b three-layered sandwiches	X: alpha/beta knot (From Topology)	H: alpha/beta knot (From Topology)	T: alpha/beta knot	F: SpoU_methylase	ECOD (1.6)
A	SpoU_methylase	e4xboA1	A: a/b three-layered sandwiches	X: alpha/beta knot (From Topology)	H: alpha/beta knot (From Topology)	T: alpha/beta knot	F: SpoU_methylase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.1280.10	Alpha Beta	3-Layer(aba) Sandwich	Alpha/beta knot	SPOUT methyltransferase, trefoil knot domain	CATH (4.3.0)
B	1.10.8.590	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)
A	3.40.1280.10	Alpha Beta	3-Layer(aba) Sandwich	Alpha/beta knot	SPOUT methyltransferase, trefoil knot domain	CATH (4.3.0)
A	1.10.8.590	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	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, B	tRNA (cytidine/uridine-2'-O-)-methyltransferase TrmJ	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity RNA binding organic cyclic compound binding nucleic acid binding tRNA 2'-O-methyltransferase activity tRNA methyltransferase activity RNA methyltransferase activity O-methyltransferase activity catalytic activity, acting on RNA transferase activity, transferring one-carbon groups identical protein binding protein binding binding protein homodimerization activity protein dimerization activity RNA binding organic cyclic compound binding nucleic acid binding tRNA 2'-O-methyltransferase activity tRNA methyltransferase activity RNA methyltransferase activity O-methyltransferase activity catalytic activity, acting on RNA 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 tRNA (uracil-2'-O-)-methyltransferase activity methyltransferase activity catalytic activity RNA 2'-O-methyltransferase activity	cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process organic substance metabolic process tRNA processing organic substance biosynthetic process RNA processing cellular metabolic process tRNA modification primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process macromolecule methylation cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process organic substance metabolic process tRNA processing organic substance biosynthetic process RNA processing cellular metabolic process tRNA modification primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process macromolecule methylation tRNA metabolic process organic cyclic compound metabolic process tRNA nucleoside ribose methylation RNA modification biosynthetic process methylation macromolecule modification ncRNA metabolic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process RNA methylation tRNA methylation	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR004384	RNA methyltransferase TrmJ/LasT	Family
A, B	IPR001537	tRNA/rRNA methyltransferase, SpoU type	Domain
A, B	IPR029026	tRNA (guanine-N1-)-methyltransferase, N-terminal	Homologous Superfamily
A, B	IPR029028	Alpha/beta knot methyltransferases	Homologous Superfamily

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.