Annotations: 3KRN

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	FERM_N_2	e3krnB3	A: a/b three-layered sandwiches	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: FERM_N_2	ECOD (v294.1)
A	FERM_N_2	e3krnA3	A: a/b three-layered sandwiches	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: FERM_N_2	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
A	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, 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
A, 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, B	Protein C14A4.5, confirmed by transcript evidence	hydrolase activity, acting on ester bonds nuclease activity catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity hydrolase activity exonuclease activity catalytic activity DNA binding double-stranded DNA binding binding nucleic acid binding RNA binding protein binding enzyme binding	cellular component disassembly catabolic process primary metabolic process DNA metabolic process cell death nucleic acid metabolic process macromolecule catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process cellular component organization execution phase of apoptosis apoptotic DNA fragmentation cellular component disassembly involved in execution phase of apoptosis DNA catabolic process nucleic acid catabolic process cellular component disassembly catabolic process primary metabolic process DNA metabolic process cell death nucleic acid metabolic process macromolecule catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process cellular component organization execution phase of apoptosis apoptotic DNA fragmentation cellular component disassembly involved in execution phase of apoptosis DNA catabolic process nucleic acid catabolic process metabolic process cellular process apoptotic nuclear changes macromolecule metabolic process apoptotic process cellular component organization or biogenesis programmed cell death sno(s)RNA processing RNA metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process RNA biosynthetic process nucleic acid biosynthetic process sno(s)RNA 3'-end processing biosynthetic process sno(s)RNA metabolic process RNA 3'-end processing RNA processing poly(A)-dependent snoRNA 3'-end processing ribonucleoprotein complex biogenesis rRNA processing cellular component biogenesis ribosome biogenesis rRNA metabolic process rRNA catabolic process RNA catabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular process RNA surveillance negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process nuclear RNA surveillance nuclear-transcribed mRNA catabolic process regulation of biological process negative regulation of metabolic process nuclear mRNA surveillance biological regulation regulation of macromolecule metabolic process mRNA metabolic process regulation of gene expression negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process regulation of metabolic process U4 snRNA 3'-end processing snRNA 3'-end processing snRNA metabolic process snRNA processing	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 exosome (RNase complex) protein-containing complex catalytic complex exoribonuclease complex nuclear protein-containing complex nuclear exosome (RNase complex) cytoplasm cytoplasmic exosome (RNase complex)

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR050080	Ribonuclease PH	Family
A, B	IPR027408	PNPase/RNase PH domain superfamily	Homologous Superfamily
A, B	IPR001247	Exoribonuclease, phosphorolytic domain 1	Domain
A, B	IPR036345	Exoribonuclease, PH domain 2 superfamily	Homologous Superfamily
A, B	IPR020568	Ribosomal protein uS5 domain 2-type superfamily	Homologous Superfamily
A, B	IPR015847	Exoribonuclease, phosphorolytic domain 2	Domain

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.