Annotations: 4BA1

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4ba1a1	Alpha and beta proteins (a+b)	Ribosomal protein S5 domain 2-like	Ribosomal protein S5 domain 2-like	Ribonuclease PH domain 1-like	Exosome complex exonuclease 2,ECX2	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
A	d4ba1a2	Alpha and beta proteins (a+b)	Ribonuclease PH domain 2-like	Ribonuclease PH domain 2-like	Ribonuclease PH domain 2-like	Exosome complex exonuclease 2, ECX2	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
A	d4ba1a3	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
B	d4ba1b1	Alpha and beta proteins (a+b)	Ribosomal protein S5 domain 2-like	Ribosomal protein S5 domain 2-like	Ribonuclease PH domain 1-like	Exosome complex exonuclease 1, ECX1	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
B	d4ba1b2	Alpha and beta proteins (a+b)	Ribonuclease PH domain 2-like	Ribonuclease PH domain 2-like	Ribonuclease PH domain 2-like	Exosome complex exonuclease 1, ECX1	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
C [auth I]	d4ba1i2	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	S1-domain of exosome complex RNA-binding protein 1, ECR1	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
C [auth I]	d4ba1i1	All beta proteins	Barrel-sandwich hybrid	Ribosomal L27 protein-like	ECR1 N-terminal domain-like	Exosome complex RNA-binding protein 1, ECR1	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)
C [auth I]	d4ba1i3	Alpha and beta proteins (a+b)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	Exosome complex RNA-binding protein 1, ECR1	(Saccharolobus solfataricus ) [TaxId: 2287 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Ribonuclease PH domain 2-like	8034675	3000346	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ribosomal protein S5 domain 2-like	8034673	3000100	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ribonuclease PH domain 2-like	8034679	3000346	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ribosomal protein S5 domain 2-like	8034677	3000100	SCOP2B (2022-06-29)
C [auth I]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034682	3000135	SCOP2B (2022-06-29)
C [auth I]	SCOP2B Superfamily	Eukaryotic type KH-domain (KH-domain type I)	8034684	3001023	SCOP2B (2022-06-29)
C [auth I]	SCOP2B Superfamily	Ribosomal L27 protein-like	8034683	3000539	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	RNase_PH_2	e4ba1A2	A: a+b two layers	X: Ribosomal protein S5 domain 2-like (From Topology)	H: Ribosomal protein S5 domain 2-like (From Topology)	T: Ribosomal protein S5 domain 2-like	F: RNase_PH_2	ECOD (1.6)
A	RNase_PH_C_1	e4ba1A1	A: a+b two layers	X: Ribonuclease PH domain 2-like	H: Ribonuclease PH domain 2 (From Topology)	T: Ribonuclease PH domain 2	F: RNase_PH_C_1	ECOD (1.6)
B	RNase_PH	e4ba1B2	A: a+b two layers	X: Ribosomal protein S5 domain 2-like (From Topology)	H: Ribosomal protein S5 domain 2-like (From Topology)	T: Ribosomal protein S5 domain 2-like	F: RNase_PH	ECOD (1.6)
B	RNase_PH_C_3	e4ba1B1	A: a+b two layers	X: Ribonuclease PH domain 2-like	H: Ribonuclease PH domain 2 (From Topology)	T: Ribonuclease PH domain 2	F: RNase_PH_C_3	ECOD (1.6)
C [auth I]	S1_5	e4ba1I4	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: S1_5	ECOD (1.6)
C [auth I]	KH_6_2	e4ba1I5	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Eukaryotic type KH-domain (KH-domain type I)	F: KH_6_2	ECOD (1.6)
C [auth I]	ECR1_N_2	e4ba1I6	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Ribosomal L27 protein	F: ECR1_N_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
B	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
C [auth I]	2.40.50.100	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain	CATH (4.3.0)
C [auth I]	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
C [auth I]	3.30.1370.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S8	Chain: A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF03725	3' exoribonuclease family, domain 2 (RNase_PH_C)	3' exoribonuclease family, domain 2	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of ...	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of the domain. PNPase is involved in mRNA degradation in a 3'-5' direction. The exosome is a 3'-5' exoribonuclease complex that is required for 3' processing of the 5.8S rRNA. Three of its five protein components, Swiss:P46948 Swiss:Q12277 and Swiss:P25359 contain a copy of this domain [1]. Swiss:Q10205, a hypothetical protein from S. pombe appears to belong to an uncharacterised subfamily. This subfamily is found in both eukaryotes and archaebacteria.	Domain
A	PF01138	3' exoribonuclease family, domain 1 (RNase_PH)	3' exoribonuclease family, domain 1	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of ...	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of the domain. PNPase is involved in mRNA degradation in a 3'-5' direction. The exosome is a 3'-5' exoribonuclease complex that is required for 3' processing of the 5.8S rRNA. Three of its five protein components, Swiss:P46948 Swiss:Q12277 and Swiss:P25359 contain a copy of this domain [1]. Swiss:Q10205, a hypothetical protein from S. pombe appears to belong to an uncharacterised subfamily. This subfamily is found in both eukaryotes and archaebacteria.	Domain
B	PF03725	3' exoribonuclease family, domain 2 (RNase_PH_C)	3' exoribonuclease family, domain 2	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of ...	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of the domain. PNPase is involved in mRNA degradation in a 3'-5' direction. The exosome is a 3'-5' exoribonuclease complex that is required for 3' processing of the 5.8S rRNA. Three of its five protein components, Swiss:P46948 Swiss:Q12277 and Swiss:P25359 contain a copy of this domain [1]. Swiss:Q10205, a hypothetical protein from S. pombe appears to belong to an uncharacterised subfamily. This subfamily is found in both eukaryotes and archaebacteria.	Domain
B	PF01138	3' exoribonuclease family, domain 1 (RNase_PH)	3' exoribonuclease family, domain 1	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of ...	This family includes 3'-5' exoribonucleases. Ribonuclease PH contains a single copy of this domain, and removes nucleotide residues following the -CCA terminus of tRNA. Polyribonucleotide nucleotidyltransferase (PNPase) contains two tandem copies of the domain. PNPase is involved in mRNA degradation in a 3'-5' direction. The exosome is a 3'-5' exoribonuclease complex that is required for 3' processing of the 5.8S rRNA. Three of its five protein components, Swiss:P46948 Swiss:Q12277 and Swiss:P25359 contain a copy of this domain [1]. Swiss:Q10205, a hypothetical protein from S. pombe appears to belong to an uncharacterised subfamily. This subfamily is found in both eukaryotes and archaebacteria.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROBABLE EXOSOME COMPLEX EXONUCLEASE 2	-	catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process macromolecule metabolic process rRNA metabolic process organic substance catabolic process RNA catabolic process	exosome (RNase complex) protein-containing complex intracellular anatomical structure catalytic complex cytoplasm cellular anatomical entity cytoplasmic exosome (RNase complex) exoribonuclease complex
B	PROBABLE EXOSOME COMPLEX EXONUCLEASE 1	3'-5'-RNA exonuclease activity catalytic activity, acting on RNA RNA exonuclease activity, producing 5'-phosphomonoesters catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity RNA exonuclease activity RNA nuclease activity hydrolase activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters nuclease activity hydrolase activity, acting on ester bonds exonuclease activity catalytic activity	catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process macromolecule metabolic process rRNA metabolic process organic substance catabolic process RNA catabolic process	exosome (RNase complex) protein-containing complex intracellular anatomical structure catalytic complex cytoplasm cellular anatomical entity cytoplasmic exosome (RNase complex) exoribonuclease complex
C [auth I]	PROBABLE EXOSOME COMPLEX RNA-BINDING PROTEIN 1	RNA binding binding organic cyclic compound binding poly(A) binding poly-purine tract binding nucleic acid binding single-stranded RNA binding	cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process organic substance metabolic process sno(s)RNA metabolic process organic substance biosynthetic process RNA 3'-end processing RNA processing poly(A)-dependent snoRNA 3'-end processing sno(s)RNA processing cellular metabolic process primary metabolic process gene expression macromolecule biosynthetic process cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process organic substance metabolic process sno(s)RNA metabolic process organic substance biosynthetic process RNA 3'-end processing RNA processing poly(A)-dependent snoRNA 3'-end processing sno(s)RNA processing cellular metabolic process primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process organic cyclic compound metabolic process sno(s)RNA 3'-end processing biosynthetic process ncRNA metabolic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process CUT metabolic process CUT catabolic process ribonucleoprotein complex biogenesis exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) rRNA processing cellular component biogenesis ribosome biogenesis cellular component organization or biogenesis rRNA metabolic process maturation of 5.8S rRNA maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) rRNA 3'-end processing U4 snRNA 3'-end processing snRNA metabolic process snRNA processing snRNA 3'-end processing	exosome (RNase complex) protein-containing complex intracellular anatomical structure catalytic complex cellular anatomical entity exoribonuclease complex cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR027408	PNPase/RNase PH domain superfamily	Homologous Superfamily
A	IPR001247	Exoribonuclease, phosphorolytic domain 1	Domain
A	IPR036345	Exoribonuclease, PH domain 2 superfamily	Homologous Superfamily
A	IPR020568	Ribosomal protein uS5 domain 2-type superfamily	Homologous Superfamily
A	IPR015847	Exoribonuclease, phosphorolytic domain 2	Domain
A	IPR020869	Exosome complex component Rrp42, archaea	Family
B	IPR011807	Exosome complex component Rrp41	Family
B	IPR027408	PNPase/RNase PH domain superfamily	Homologous Superfamily
B	IPR001247	Exoribonuclease, phosphorolytic domain 1	Domain
B	IPR036345	Exoribonuclease, PH domain 2 superfamily	Homologous Superfamily
B	IPR020568	Ribosomal protein uS5 domain 2-type superfamily	Homologous Superfamily
B	IPR015847	Exoribonuclease, phosphorolytic domain 2	Domain
C [auth I]	IPR003029	S1 domain	Domain
C [auth I]	IPR023474	Exosome complex component Rrp4	Family
C [auth I]	IPR048565	RRP4, S1 domain	Domain
C [auth I]	IPR036612	K Homology domain, type 1 superfamily	Homologous Superfamily
C [auth I]	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
C [auth I]	IPR026699	Exosome complex RNA-binding protein 1/RRP40/RRP4	Family
C [auth I]	IPR004088	K Homology domain, type 1	Domain

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.