Annotations: 7XPL

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth E]	SCOP2B Superfamily	S-adenosyl-L-methionine-dependent methyltransferases	8063660	3000118	SCOP2B (2022-06-29)
D [auth F]	SCOP2B Superfamily	S-adenosyl-L-methionine-dependent methyltransferases	8063660	3000118	SCOP2B (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	PF01798	e7xplA1	A: alpha arrays	X: HhH/H2TH	H: SAM/DNA-glycosylase	T: Nop C-terminal domain	F: PF01798	ECOD (1.6)
A	PF01798	e7xplA3	A: alpha complex topology	X: Nop N-terminal domain (From Topology)	H: Nop N-terminal domain (From Topology)	T: Nop N-terminal domain	F: PF01798	ECOD (1.6)
A	PF21572	e7xplA2	A: mixed a+b and a/b	X: Nop N-terminal domain (From Topology)	H: Nop N-terminal domain (From Topology)	T: Nop N-terminal domain	F: PF21572	ECOD (1.6)
B	PF01798	e7xplB1	A: alpha arrays	X: HhH/H2TH	H: SAM/DNA-glycosylase	T: Nop C-terminal domain	F: PF01798	ECOD (1.6)
B	PF01798	e7xplB2	A: alpha complex topology	X: Nop N-terminal domain (From Topology)	H: Nop N-terminal domain (From Topology)	T: Nop N-terminal domain	F: PF01798	ECOD (1.6)
B	PF21572	e7xplB3	A: mixed a+b and a/b	X: Nop N-terminal domain (From Topology)	H: Nop N-terminal domain (From Topology)	T: Nop N-terminal domain	F: PF21572	ECOD (1.6)
C [auth E]	PF01269	e7xplE1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: S-adenosyl-L-methionine-dependent methyltransferases	F: PF01269	ECOD (1.6)
D [auth F]	PF01269	e7xplF1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: S-adenosyl-L-methionine-dependent methyltransferases	F: PF01269	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF21572	Archaeal Nop5/56-rel, N-terminal domain (Nop5_56-rel_N_Arc)	Archaeal Nop5/56-rel, N-terminal domain	This domain is found at the N-terminal end of a group of archaeal proteins, including Uncharacterized NOP5 family protein MJ0694 from Methanocaldococcus jannaschii. This domain interacts with fibrillarin, the other subunit of a complex that is critic ...	This domain is found at the N-terminal end of a group of archaeal proteins, including Uncharacterized NOP5 family protein MJ0694 from Methanocaldococcus jannaschii. This domain interacts with fibrillarin, the other subunit of a complex that is critical to modify and process ribosomal RNAs [1-5]. This domain shows a highly conserved folded structure despite low sequence similarity among homologs. It shows four beta-sheets surrounded by four alpha- helices [6] and is found associated with Pfam:PF01798.	Domain
A, B	PF01798	snoRNA binding domain, fibrillarin (Nop)	snoRNA binding domain, fibrillarin	-	Family
C [auth E], D [auth F]	PF01269	Fibrillarin (Fibrillarin)	Fibrillarin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	C/D box methylation guide ribonucleoprotein complex aNOP56 subunit	RNA binding binding organic cyclic compound binding snoRNA binding nucleic acid binding	-	preribosome protein-containing complex ribonucleoprotein complex small-subunit processome box C/D methylation guide snoRNP complex sno(s)RNA-containing ribonucleoprotein complex box C/D RNP complex
C [auth E], D [auth F]	Fibrillarin-like rRNA/tRNA 2'-O-methyltransferase	catalytic activity, acting on a protein transferase activity, transferring one-carbon groups protein-glutamine N-methyltransferase activity transferase activity S-adenosylmethionine-dependent methyltransferase activity histone methyltransferase activity N-methyltransferase activity protein methyltransferase activity histone modifying activity methyltransferase activity catalytic activity histone H2A methyltransferase activity histone H2AQ104 methyltransferase activity RNA binding catalytic activity, acting on a protein transferase activity, transferring one-carbon groups protein-glutamine N-methyltransferase activity transferase activity S-adenosylmethionine-dependent methyltransferase activity histone methyltransferase activity N-methyltransferase activity protein methyltransferase activity histone modifying activity methyltransferase activity catalytic activity histone H2A methyltransferase activity histone H2AQ104 methyltransferase activity RNA binding binding organic cyclic compound binding nucleic acid binding RNA methyltransferase activity rRNA methyltransferase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid catalytic activity, acting on a rRNA	cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process biosynthetic process tRNA processing organic substance biosynthetic process nucleic acid catabolic process cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process biosynthetic process tRNA processing organic substance biosynthetic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process RNA processing sno(s)RNA metabolic process box C/D sno(s)RNA 3'-end processing RNA 3'-end processing sno(s)RNA processing box C/D sno(s)RNA metabolic process box C/D sno(s)RNA processing sno(s)RNA 3'-end processing ribonucleoprotein complex biogenesis rRNA methylation rRNA processing rRNA modification cellular component biogenesis ribosome biogenesis cellular component organization or biogenesis rRNA metabolic process macromolecule methylation RNA modification methylation macromolecule modification RNA methylation	box C/D methylation guide snoRNP complex protein-containing complex sno(s)RNA-containing ribonucleoprotein complex ribonucleoprotein complex box C/D RNP complex
E [auth G]	BMG3 RNA strand A	-	-	-
F [auth H]	BMG3 RNA strand B	-	-	-
G [auth I], H [auth J]	RNA (5'-R(CPCPAPUPGPAPGPUPGPUP*U)-3')	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR042239	Nop, C-terminal domain	Homologous Superfamily
A, B	IPR036070	Nop domain superfamily	Homologous Superfamily
A, B	IPR045056	Nucleolar protein Nop56/Nop58	Family
A, B	IPR002687	Nop domain	Domain
A, B	IPR048896	Nop5/56-related, N-terminal domain	Domain
A, B	IPR012976	NOSIC	Domain
A, B	IPR047099	Nop5, N-terminal domain superfamily	Homologous Superfamily
C [auth E], D [auth F]	IPR000692	rRNA 2'-O-methyltransferase fibrillarin-like	Family
C [auth E], D [auth F]	IPR020813	Fibrillarin, conserved site	Conserved Site
C [auth E], D [auth F]	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	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 R01GM133198.