Annotations: 4AM3

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF03726	e4am3A4	A: alpha arrays	X: HTH	H: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 (From Topology)	T: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3	F: PF03726	ECOD (1.6)
A	PF01138	e4am3A2	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: PF01138	ECOD (1.6)
A	PF03725	e4am3A5	A: a+b two layers	X: Ribonuclease PH domain 2-like	H: Ribonuclease PH domain 2 (From Topology)	T: Ribonuclease PH domain 2	F: PF03725	ECOD (1.6)
A	F_UNCLASSIFIED	e4am3A7	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Prokaryotic type KH domain (KH-domain type II)	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF03726	e4am3B4	A: alpha arrays	X: HTH	H: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 (From Topology)	T: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3	F: PF03726	ECOD (1.6)
B	PF01138	e4am3B2	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: PF01138	ECOD (1.6)
B	PF03725	e4am3B5	A: a+b two layers	X: Ribonuclease PH domain 2-like	H: Ribonuclease PH domain 2 (From Topology)	T: Ribonuclease PH domain 2	F: PF03725	ECOD (1.6)
B	F_UNCLASSIFIED	e4am3B7	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Prokaryotic type KH domain (KH-domain type II)	F: F_UNCLASSIFIED	ECOD (1.6)
C	PF03726	e4am3C4	A: alpha arrays	X: HTH	H: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 (From Topology)	T: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3	F: PF03726	ECOD (1.6)
C	PF01138	e4am3C2	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: PF01138	ECOD (1.6)
C	PF03725	e4am3C5	A: a+b two layers	X: Ribonuclease PH domain 2-like	H: Ribonuclease PH domain 2 (From Topology)	T: Ribonuclease PH domain 2	F: PF03725	ECOD (1.6)
C	F_UNCLASSIFIED	e4am3C7	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Prokaryotic type KH domain (KH-domain type II)	F: F_UNCLASSIFIED	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)
A	1.10.10.400	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Polyribonucleotide nucleotidyltransferase, RNA-binding domain	CATH (4.3.0)
A	3.30.1370.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S8	Chain: A, domain 1	CATH (4.3.0)
B	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
B	1.10.10.400	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Polyribonucleotide nucleotidyltransferase, RNA-binding domain	CATH (4.3.0)
B	3.30.1370.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S8	Chain: A, domain 1	CATH (4.3.0)
C	3.30.230.70	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
C	1.10.10.400	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Polyribonucleotide nucleotidyltransferase, RNA-binding domain	CATH (4.3.0)
C	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, B, C	PF03726	Polyribonucleotide nucleotidyltransferase, RNA binding domain (PNPase)	Polyribonucleotide nucleotidyltransferase, RNA binding domain	This family contains the RNA binding domain of Polyribonucleotide nucleotidyltransferase (PNPase) PNPase is involved in mRNA degradation in a 3'-5' direction.	Domain
A, B, C	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, C	PF00013	KH domain (KH_1)	KH domain	KH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.	Domain
A, B, C	PF00575	S1 RNA binding domain (S1)	S1 RNA binding domain	The S1 domain occurs in a wide range of RNA associated proteins. It is structurally similar to cold shock protein which binds nucleic acids. The S1 domain has an OB-fold structure.	Domain
A, B, C	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, C	POLYRIBONUCLEOTIDE NUCLEOTIDYLTRANSFERASE	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding polyribonucleotide nucleotidyltransferase activity transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups RNA binding organic cyclic compound binding nucleic acid binding	regulation of cellular process catabolic process cellular biosynthetic process negative regulation of biological process RNA metabolic process negative regulation of cellular metabolic process macromolecule catabolic process nucleobase-containing compound metabolic process organic substance metabolic process organic substance biosynthetic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of cellular process catabolic process cellular biosynthetic process negative regulation of biological process RNA metabolic process negative regulation of cellular metabolic process macromolecule catabolic process nucleobase-containing compound metabolic process organic substance metabolic process organic substance biosynthetic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process regulation of biological process cellular metabolic process negative regulation of metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process mRNA metabolic process negative regulation of cellular biosynthetic process nucleic acid metabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process regulation of cellular biosynthetic process regulation of gene expression organic cyclic compound metabolic process negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process organic substance catabolic process RNA processing	intracellular anatomical structure cytoplasm cellular anatomical entity
D, E, F [auth H], G [auth I]	RNA, 5'-R(UPAPAPCPUPUPUPGP*GP)-3'	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR003029	S1 domain	Domain
A, B, C	IPR004087	K Homology domain	Domain
A, B, C	IPR015848	Polyribonucleotide nucleotidyltransferase, RNA-binding domain	Domain
A, B, C	IPR012162	Polyribonucleotide nucleotidyltransferase	Family
A, B, C	IPR027408	PNPase/RNase PH domain superfamily	Homologous Superfamily
A, B, C	IPR001247	Exoribonuclease, phosphorolytic domain 1	Domain
A, B, C	IPR036612	K Homology domain, type 1 superfamily	Homologous Superfamily
A, B, C	IPR036456	Polyribonucleotide nucleotidyltransferase, RNA-binding domain superfamily	Homologous Superfamily
A, B, C	IPR036345	Exoribonuclease, PH domain 2 superfamily	Homologous Superfamily
A, B, C	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
A, B, C	IPR020568	Ribosomal protein uS5 domain 2-type superfamily	Homologous Superfamily
A, B, C	IPR004088	K Homology domain, type 1	Domain
A, B, C	IPR015847	Exoribonuclease, phosphorolytic domain 2	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.