Annotations: 1OU5

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ou5a1	All alpha proteins	Poly A polymerase C-terminal region-like	Poly A polymerase C-terminal region-like	Poly A polymerase C-terminal region-like	tRNA CCA-adding enzyme, C-terminal domains	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1ou5a2	Alpha and beta proteins (a+b)	Nucleotidyltransferase	Nucleotidyltransferase	Poly A polymerase head domain-like	tRNA CCA-adding enzyme, head domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1ou5a3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ou5b1	All alpha proteins	Poly A polymerase C-terminal region-like	Poly A polymerase C-terminal region-like	Poly A polymerase C-terminal region-like	tRNA CCA-adding enzyme, C-terminal domains	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ou5b2	Alpha and beta proteins (a+b)	Nucleotidyltransferase	Nucleotidyltransferase	Poly A polymerase head domain-like	tRNA CCA-adding enzyme, head domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ou5b3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Poly A polymerase C-terminal region-like	8021985	4002497	SCOP2 (2021-05-27)
A	SCOP2 Family	Poly A polymerase head domain-like	8021987	4003222	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	Poly A polymerase C-terminal region-like	8034365	3001334	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	Nucleotidyltransferase-like	8034367	3000129	SCOP2 (2021-05-27)
B	SCOP2B Superfamily	Nucleotidyltransferase-like	8034367	3000129	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	Poly A polymerase C-terminal region-like	8034365	3001334	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF12627	e1ou5A1	A: alpha complex topology	X: PDEase-like	H: Poly A polymerase C-terminal region-like (From Topology)	T: Poly A polymerase C-terminal region-like	F: PF12627	ECOD (1.6)
A	PF01743	e1ou5A2	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: PF01743	ECOD (1.6)
B	PF12627	e1ou5B1	A: alpha complex topology	X: PDEase-like	H: Poly A polymerase C-terminal region-like (From Topology)	T: Poly A polymerase C-terminal region-like	F: PF12627	ECOD (1.6)
B	PF01743	e1ou5B2	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: PF01743	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.460.10	Alpha Beta	2-Layer Sandwich	Beta Polymerase	domain 2	CATH (4.3.0)
A	1.10.3090.10	Mainly Alpha	Orthogonal Bundle	cca-adding enzyme, domain 2	cca-adding enzyme, domain 2	CATH (4.3.0)
B	3.30.460.10	Alpha Beta	2-Layer Sandwich	Beta Polymerase	domain 2	CATH (4.3.0)
B	1.10.3090.10	Mainly Alpha	Orthogonal Bundle	cca-adding enzyme, domain 2	cca-adding enzyme, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF12627	Probable RNA and SrmB- binding site of polymerase A (PolyA_pol_RNAbd)	Probable RNA and SrmB- binding site of polymerase A	This region encompasses much of the RNA and SrmB binding motifs on polymerase A.	Domain
A, B	PF01743	Poly A polymerase head domain (PolyA_pol)	Poly A polymerase head domain	This family includes nucleic acid independent RNA polymerases, such as Poly(A) polymerase, which adds the poly (A) tail to mRNA EC:2.7.7.19. This family also includes the tRNA nucleotidyltransferase that adds the CCA to the 3' of the tRNA EC:2.7.7.25 ...	This family includes nucleic acid independent RNA polymerases, such as Poly(A) polymerase, which adds the poly (A) tail to mRNA EC:2.7.7.19. This family also includes the tRNA nucleotidyltransferase that adds the CCA to the 3' of the tRNA EC:2.7.7.25. This family is part of the nucleotidyltransferase superfamily.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	tRNA CCA-adding enzyme	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cytidylyltransferase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid catalytic activity, acting on a tRNA transferase activity nucleotidyltransferase activity catalytic activity CCA tRNA nucleotidyltransferase activity transferase activity, transferring phosphorus-containing groups identical protein binding protein binding protein homodimerization activity protein dimerization activity CCACCA tRNA nucleotidyltransferase activity 5'-3' RNA polymerase activity RNA polymerase activity RNA binding tRNA binding nucleic acid binding cation binding metal ion binding	cellular component disassembly organonitrogen compound metabolic process ribosome disassembly cellular biosynthetic process cellular metabolic process rescue of stalled ribosome organonitrogen compound biosynthetic process primary metabolic process translation gene expression macromolecule biosynthetic process cellular component organization organelle organization organelle disassembly biosynthetic process cellular component disassembly organonitrogen compound metabolic process ribosome disassembly cellular biosynthetic process cellular metabolic process rescue of stalled ribosome organonitrogen compound biosynthetic process primary metabolic process translation gene expression macromolecule biosynthetic process cellular component organization organelle organization organelle disassembly biosynthetic process translational elongation cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process protein metabolic process catabolic process RNA metabolic process nucleic acid metabolic process macromolecule catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process tRNA metabolic process tRNA surveillance nucleic acid catabolic process RNA surveillance tRNA decay RNA catabolic process mitochondrial gene expression mitochondrial tRNA 3'-end processing RNA biosynthetic process nucleic acid biosynthetic process mitochondrial RNA processing tRNA processing RNA 3'-end processing RNA processing tRNA 3'-end processing mitochondrial tRNA processing nucleobase-containing compound biosynthetic process mitochondrial RNA metabolic process mitochondrial RNA 3'-end processing tRNA 3'-terminal CCA addition	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cytosol nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cytosol nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen mitochondrial matrix

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR043519	Nucleotidyltransferase superfamily	Homologous Superfamily
A, B	IPR002646	Poly A polymerase, head domain	Domain
A, B	IPR032828	tRNA nucleotidyltransferase/poly(A) polymerase, RNA and SrmB- binding domain	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 R01GM133198.