Annotations: 4KH4

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Sigma70_r2,Sigma70_ner	e4kh4B1	A: a/b three-layered sandwiches	X: TIM beta/alpha-barrel	H: TIM barrels	T: TIM barrels	F: Sigma70_r2,Sigma70_ner	ECOD (v294.1)
A	Sigma70_r2,Sigma70_ner	e4kh4A1	A: a/b three-layered sandwiches	X: TIM beta/alpha-barrel	H: TIM barrels	T: TIM barrels	F: Sigma70_r2,Sigma70_ner	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.420.530	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
B	3.30.420.540	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A	3.30.420.530	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A	3.30.420.540	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Nucleoside-triphosphatase 2	pyrophosphatase activity nucleoside diphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity ribonucleoside triphosphate phosphatase activity	nucleoside phosphate metabolic process catabolic process organophosphate catabolic process primary metabolic process nucleoside phosphate catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process nucleoside diphosphate metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process nucleoside diphosphate catabolic process metabolic process cellular process nucleoside phosphate metabolic process catabolic process organophosphate catabolic process primary metabolic process nucleoside phosphate catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process nucleoside diphosphate metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process nucleoside diphosphate catabolic process metabolic process cellular process small molecule metabolic process phosphorus metabolic process	cellular anatomical structure membrane extracellular region symbiont-containing vacuole

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR017227	Nucleoside-triphosphatase, alveolata	Family
A, B	IPR000407	Nucleoside phosphatase GDA1/CD39	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.