Annotations: 5X4K

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	RecJ	e5x4kA2	A: alpha arrays	X: HhH/H2TH	H: Cdc45 CID domain (From Topology)	T: Cdc45 CID domain	F: RecJ	ECOD (1.6)
A	DHHA1	e5x4kA3	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: DHHA1	ECOD (1.6)
A	DHH	e5x4kA1	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	3.90.1640.30	Alpha Beta	Alpha-Beta Complex	inorganic pyrophosphatase (n-terminal core)		CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21763	DHH-CID domain (DHH_CID)	DHH-CID domain	DHH-CID (CMG Interacting Domain) domain is found in proteins that are members of DHH phosphatase family. This domain is located between the catalytic domains and consists of array of four helices with two 'kissing' loops. The DHH-CID domain contains ...	DHH-CID (CMG Interacting Domain) domain is found in proteins that are members of DHH phosphatase family. This domain is located between the catalytic domains and consists of array of four helices with two 'kissing' loops. The DHH-CID domain contains H2TH motif and is structurally very similar to proteins members of S13-like H2TH superfamily.	Domain
A	PF02272	DHHA1 domain (DHHA1)	DHHA1 domain	This domain is often found adjacent to the DHH domain Pfam:PF01368 and is called DHHA1 for DHH associated domain. This domain is diagnostic of DHH subfamily 1 members [1]. This domains is also found in alanyl tRNA synthetase e.g. Swiss:P00957, sugges ...	This domain is often found adjacent to the DHH domain Pfam:PF01368 and is called DHHA1 for DHH associated domain. This domain is diagnostic of DHH subfamily 1 members [1]. This domains is also found in alanyl tRNA synthetase e.g. Swiss:P00957, suggesting that this domain may have an RNA binding function. The domain is about 60 residues long and contains a conserved GG motif.	Domain
A	PF01368	DHH family, N-terminal domain (DHH)	DHH family, N-terminal domain	It is predicted that this family of proteins all perform a phosphoesterase function. This domain is found at the N-terminal of the single stranded DNA exonuclease RecJ. It shows an alpha-beta configuration [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Uncharacterized protein	nuclease activity hydrolase activity, acting on ester bonds hydrolase activity exonuclease activity catalytic activity binding nucleic acid binding cation binding ion binding metal ion binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001667	DDH domain	Domain
A	IPR048515	DHH-CID domain	Domain
A	IPR038763	DHH phosphoesterase superfamily	Homologous Superfamily
A	IPR003156	DHHA1 domain	Domain
A	IPR051673	Single-stranded-DNA-specific exonuclease RecJ	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.