Annotations: 5A53

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2 Family	Brix domain-like	8045895	4004748	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Class II aaRS ABD-related	8092351	3000465	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Class II aaRS ABD-related	8092352	3000465	SCOP2 (2022-06-29)
A	SCOP2 Family	Rrs1-like	8046715	4005257	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Rrs1-like	8092359	3002595	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)
C	Brix	e5a53C1	A: a/b three-layered sandwiches	X: Anticodon-binding domain of Class II aaRS (From Topology)	H: Anticodon-binding domain of Class II aaRS (From Topology)	T: Anticodon-binding domain of Class II aaRS	F: Brix	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF04427	Brix domain (Brix)	Brix domain		Domain
A	PF04939	Ribosome biogenesis regulatory protein (RRS1) (RRS1)	Ribosome biogenesis regulatory protein (RRS1)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	RIBOSOME BIOGENESIS PROTEIN RPF2	RNA binding binding rRNA binding 5S rRNA binding nucleic acid binding 7S RNA binding	maturation of 5.8S rRNA ribonucleoprotein complex biogenesis RNA metabolic process primary metabolic process rRNA processing gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular component biogenesis RNA biosynthetic process ribosome biogenesis nucleic acid biosynthetic process maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) maturation of 5.8S rRNA ribonucleoprotein complex biogenesis RNA metabolic process primary metabolic process rRNA processing gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular component biogenesis RNA biosynthetic process ribosome biogenesis nucleic acid biosynthetic process maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) biosynthetic process metabolic process cellular process macromolecule metabolic process cellular component organization or biogenesis RNA processing rRNA metabolic process organelle assembly protein-containing complex organization membraneless organelle assembly ribosomal large subunit biogenesis protein-RNA complex assembly cellular component organization organelle organization protein-RNA complex organization cellular component assembly assembly of large subunit precursor of preribosome protein-containing complex assembly ribosomal large subunit assembly ribosome assembly maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) maturation of LSU-rRNA	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen preribosome protein-containing complex ribonucleoprotein complex preribosome, large subunit precursor
B	REGULATOR OF RIBOSOME BIOSYNTHESIS	-	cellular component biogenesis ribosome biogenesis ribonucleoprotein complex biogenesis cellular process cellular component organization or biogenesis ribosomal large subunit biogenesis establishment of organelle localization cellular localization nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus ribosomal large subunit export from nucleus intracellular transport cellular component biogenesis ribosome biogenesis ribonucleoprotein complex biogenesis cellular process cellular component organization or biogenesis ribosomal large subunit biogenesis establishment of organelle localization cellular localization nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus ribosomal large subunit export from nucleus intracellular transport establishment of localization localization organelle localization establishment of localization in cell nuclear export ribosome localization RNA metabolic process rRNA processing maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process maturation of SSU-rRNA endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) RNA processing rRNA metabolic process endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) maturation of 5.8S rRNA primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process ribosomal small subunit biogenesis nucleic acid metabolic process maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) biosynthetic process metabolic process macromolecule metabolic process	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen nuclear periphery preribosome protein-containing complex ribonucleoprotein complex preribosome, large subunit precursor nucleoplasm
A	REGULATOR OF RIBOSOME BIOSYNTHESIS	-	cellular component biogenesis ribosome biogenesis ribonucleoprotein complex biogenesis cellular process cellular component organization or biogenesis ribosomal large subunit biogenesis establishment of organelle localization cellular localization nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus ribosomal large subunit export from nucleus intracellular transport cellular component biogenesis ribosome biogenesis ribonucleoprotein complex biogenesis cellular process cellular component organization or biogenesis ribosomal large subunit biogenesis establishment of organelle localization cellular localization nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus ribosomal large subunit export from nucleus intracellular transport establishment of localization localization organelle localization establishment of localization in cell nuclear export ribosome localization RNA metabolic process rRNA processing maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process maturation of SSU-rRNA endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) RNA processing rRNA metabolic process endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) maturation of 5.8S rRNA primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process ribosomal small subunit biogenesis nucleic acid metabolic process maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) biosynthetic process metabolic process macromolecule metabolic process	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen nuclear periphery preribosome protein-containing complex ribonucleoprotein complex preribosome, large subunit precursor nucleoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR039770	Ribosome biogenesis protein Rpf2	Family
C	IPR007109	Brix domain	Domain
B	IPR007023	Ribosomal biogenesis regulatory protein	Family
A	IPR007023	Ribosomal biogenesis regulatory protein	Family

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.