Annotations: 5C5V

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	HypA	e5c5vB1	A: a/b three-layered sandwiches	X: Lipocalins/Streptavidin	H: Fibronectin type I module-like	T: Fibronectin type I module	F: HypA	ECOD (v294.1)
A	PapD_N	e5c5vA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Rubredoxin-related	T: Rubredoxin-related	F: PapD_N	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.90.80.10	Alpha Beta	Alpha-Beta Complex	Inorganic Pyrophosphatase	Inorganic pyrophosphatase	CATH (4.3.0)
A	3.90.80.10	Alpha Beta	Alpha-Beta Complex	Inorganic Pyrophosphatase	Inorganic pyrophosphatase	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00719	Inorganic pyrophosphatase (Pyrophosphatase)	Inorganic pyrophosphatase		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Acidocalcisomal pyrophosphatase	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding pyrophosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity inorganic diphosphate phosphatase activity hydrolase activity, acting on acid anhydrides catalytic activity	phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process post-transcriptional regulation of gene expression regulation of gene expression biosynthetic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process post-transcriptional regulation of gene expression regulation of gene expression biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of metabolic process	cellular anatomical structure membrane intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036649	Inorganic pyrophosphatase superfamily	Homologous Superfamily
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR008162	Inorganic pyrophosphatase	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.