Annotations: 1K23

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1k23a_	Alpha and beta proteins (a/b)	DHH phosphoesterases	DHH phosphoesterases	Manganese-dependent inorganic pyrophosphatase (family II)	Manganese-dependent inorganic pyrophosphatase (family II)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
B	d1k23b_	Alpha and beta proteins (a/b)	DHH phosphoesterases	DHH phosphoesterases	Manganese-dependent inorganic pyrophosphatase (family II)	Manganese-dependent inorganic pyrophosphatase (family II)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
C	d1k23c_	Alpha and beta proteins (a/b)	DHH phosphoesterases	DHH phosphoesterases	Manganese-dependent inorganic pyrophosphatase (family II)	Manganese-dependent inorganic pyrophosphatase (family II)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
D	d1k23d_	Alpha and beta proteins (a/b)	DHH phosphoesterases	DHH phosphoesterases	Manganese-dependent inorganic pyrophosphatase (family II)	Manganese-dependent inorganic pyrophosphatase (family II)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	DHH phosphoesterases	8043676	3000896	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	DHH phosphoesterases	8043676	3000896	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	DHH phosphoesterases	8043676	3000896	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	DHH phosphoesterases	8043676	3000896	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DHHA2	e1k23A1	A: a+b three layers	X: C-terminal domain in DHH phosphoesterases (From Topology)	H: C-terminal domain in DHH phosphoesterases (From Topology)	T: C-terminal domain in DHH phosphoesterases	F: DHHA2	ECOD (1.6)
A	DHH	e1k23A2	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: DHH phosphoesterases	F: DHH	ECOD (1.6)
B	DHHA2	e1k23B1	A: a+b three layers	X: C-terminal domain in DHH phosphoesterases (From Topology)	H: C-terminal domain in DHH phosphoesterases (From Topology)	T: C-terminal domain in DHH phosphoesterases	F: DHHA2	ECOD (1.6)
B	DHH	e1k23B2	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: DHH phosphoesterases	F: DHH	ECOD (1.6)
C	DHHA2	e1k23C1	A: a+b three layers	X: C-terminal domain in DHH phosphoesterases (From Topology)	H: C-terminal domain in DHH phosphoesterases (From Topology)	T: C-terminal domain in DHH phosphoesterases	F: DHHA2	ECOD (1.6)
C	DHH	e1k23C2	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: DHH phosphoesterases	F: DHH	ECOD (1.6)
D	DHHA2	e1k23D2	A: a+b three layers	X: C-terminal domain in DHH phosphoesterases (From Topology)	H: C-terminal domain in DHH phosphoesterases (From Topology)	T: C-terminal domain in DHH phosphoesterases	F: DHHA2	ECOD (1.6)
D	DHH	e1k23D1	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: DHH phosphoesterases	F: DHH	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1640.10	Alpha Beta	Alpha-Beta Complex	inorganic pyrophosphatase (n-terminal core)	inorganic pyrophosphatase (n-terminal core)	CATH (4.3.0)
A	3.10.310.20	Alpha Beta	Roll	Diaminopimelate Epimerase	Chain A, domain 1	CATH (4.3.0)
B	3.90.1640.10	Alpha Beta	Alpha-Beta Complex	inorganic pyrophosphatase (n-terminal core)	inorganic pyrophosphatase (n-terminal core)	CATH (4.3.0)
B	3.10.310.20	Alpha Beta	Roll	Diaminopimelate Epimerase	Chain A, domain 1	CATH (4.3.0)
C	3.90.1640.10	Alpha Beta	Alpha-Beta Complex	inorganic pyrophosphatase (n-terminal core)	inorganic pyrophosphatase (n-terminal core)	CATH (4.3.0)
C	3.10.310.20	Alpha Beta	Roll	Diaminopimelate Epimerase	Chain A, domain 1	CATH (4.3.0)
D	3.90.1640.10	Alpha Beta	Alpha-Beta Complex	inorganic pyrophosphatase (n-terminal core)	inorganic pyrophosphatase (n-terminal core)	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF02833	DHHA2 domain (DHHA2)	DHHA2 domain	-	Family
A, B, C, D	PF01368	DHH family (DHH)	DHH family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Manganese-dependent inorganic pyrophosphatase	cation binding manganese ion binding transition metal 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	-	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR022934	Manganese-dependent inorganic pyrophosphatase, probable	Family
A, B, C, D	IPR001667	DDH domain	Domain
A, B, C, D	IPR004097	DHHA2 domain	Domain
A, B, C, D	IPR038763	DHH phosphoesterase superfamily	Homologous Superfamily
A, B, C, D	IPR038222	DHHA2 domain superfamily	Homologous Superfamily

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.