Annotations: 3SBS

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3sbsa2	All alpha proteins	alpha-alpha superhelix	U5 small nuclear riboprotein particle assembly factor Aar2 C-terminal domain-like	U5 small nuclear riboprotein particle assembly factor Aar2 C-terminal domain-like	U5 small nuclear riboprotein particle assembly factor Aar2 C-terminal domain	Baker's yeast (Saccharomyces cerevisiae S288C ) [TaxId: 559292 ],	SCOPe (2.08)
A	d3sbsa1	All beta proteins	U5 small nuclear riboprotein particle assembly factor Aar2 N-terminal domain-like	U5 small nuclear riboprotein particle assembly factor Aar2 N-terminal domain-like	U5 small nuclear riboprotein particle assembly factor Aar2 N-terminal domain-like	U5 small nuclear riboprotein particle assembly factor Aar2 N-terminal domain	Baker's yeast (Saccharomyces cerevisiae S288C ) [TaxId: 559292 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	AAR2_1st	e3sbsA3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: N-terminal domain in A1 cistron-splicing factor AAR2 (From Topology)	T: N-terminal domain in A1 cistron-splicing factor AAR2	F: AAR2_1st	ECOD (1.6)
A	AAR2_2nd	e3sbsA4	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: AAR2_2nd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.34.20	Mainly Beta	Sandwich	Substrate Binding Domain Of DNAk	Chain A, domain 1	CATH (4.3.0)
A	1.25.40.550	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat	Aar2, C-terminal domain-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05282	AAR2 C-terminal repeat region (AAR2)	AAR2 C-terminal repeat region	-	Repeat
A	PF20981	AAR2 N-terminal domain (AAR2_1st)	AAR2 N-terminal domain	This family consists of several eukaryotic AAR2-like proteins. The yeast protein AAR2 is involved in splicing pre-mRNA of the a1 cistron and other genes that are important for cell growth [1]. This entry represents the N-terminal Ig-like domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	A1 cistron-splicing factor AAR2	-	ribonucleoprotein complex biogenesis RNA metabolic process mRNA processing spliceosomal tri-snRNP complex assembly protein-RNA complex assembly cellular component organization cellular component biogenesis nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis ribonucleoprotein complex biogenesis RNA metabolic process mRNA processing spliceosomal tri-snRNP complex assembly protein-RNA complex assembly cellular component organization cellular component biogenesis nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis RNA processing RNA splicing protein-containing complex organization spliceosomal snRNP assembly primary metabolic process gene expression nucleobase-containing compound biosynthetic process mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process biosynthetic process RNA splicing, via transesterification reactions mRNA splicing, via spliceosome cellular process metabolic process RNA splicing, via transesterification reactions with bulged adenosine as nucleophile macromolecule metabolic process	U5 snRNP membrane-bounded organelle spliceosomal snRNP complex protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex Sm-like protein family complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure small nuclear ribonucleoprotein complex organelle ribonucleoprotein complex U5 snRNP membrane-bounded organelle spliceosomal snRNP complex protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex Sm-like protein family complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure small nuclear ribonucleoprotein complex organelle ribonucleoprotein complex cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR033648	AAR2, C-terminal domain	Domain
A	IPR038514	AAR2, C-terminal domain superfamily	Homologous Superfamily
A	IPR038516	AAR2, N-terminal domain superfamily	Homologous Superfamily
A	IPR033647	AAR2, N-terminal	Domain
A	IPR007946	A1 cistron-splicing factor, AAR2	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.