Annotations: 1LTQ

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ltqa2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Nucleotide and nucleoside kinases	Polynucleotide kinase, kinase domain	(Tequatrovirus T4 ) [TaxId: 10665 ],	SCOPe (2.08)
A	d1ltqa1	Alpha and beta proteins (a/b)	HAD-like	HAD-like	phosphatase domain of polynucleotide kinase	Polynucleotide kinase, phosphatase domain	(Tequatrovirus T4 ) [TaxId: 10665 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Adenylate kinase-like	8019143	4004025	SCOP2 (2022-06-29)
A	SCOP2 Family	Polynucleotide kinase 3 phosphatase domain-like	8019144	4002989	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	P-loop nucleotide/nucleoside kinase-like	8019145	3002021	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	HAD-like	8019148	3001890	SCOP2 (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	AAA_33	e1ltqA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: AAA_33	ECOD (1.6)
A	PNK3P	e1ltqA2	A: a/b three-layered sandwiches	X: HAD domain-like	H: HAD domain-related	T: HAD-like	F: PNK3P	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
A	3.40.50.1000	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	HAD superfamily/HAD-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13671	AAA domain (AAA_33)	AAA domain	This family of domains contain only a P-loop motif, that is characteristic of the AAA superfamily. Many of the proteins in this family are just short fragments so there is no Walker B motif.	Domain
A	PF25109	Polynucleotide kinase PNKP phosphatase domain (HAD_PNKP)	Polynucleotide kinase PNKP phosphatase domain	This entry represents the C-terminal domain of the bifunctional enzyme T4 polynucleotide kinase/phosphatase, PNKP (also known as PseT). The PNKP phosphatase domain can catalyse the hydrolytic removal of the 3'-phosphoryl of DNA, RNA and deoxynucleosi ...	This entry represents the C-terminal domain of the bifunctional enzyme T4 polynucleotide kinase/phosphatase, PNKP (also known as PseT). The PNKP phosphatase domain can catalyse the hydrolytic removal of the 3'-phosphoryl of DNA, RNA and deoxynucleoside 3'-monophosphates [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	POLYNUCLEOTIDE KINASE	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding nucleobase-containing compound kinase activity polynucleotide 5'-hydroxyl-kinase activity kinase activity ATP-dependent polydeoxyribonucleotide 5'-hydroxyl-kinase activity transferase activity ATP-dependent polynucleotide 5'-hydroxyl-kinase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups phosphoric ester hydrolase activity deoxynucleotide 3'-phosphatase activity hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity	cellular response to stimulus response to stimulus primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular response to stress DNA damage response response to stress metabolic process cellular process macromolecule metabolic process DNA repair	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR056782	Polynucleotide kinase, PNKP phosphatase domain	Domain
A	IPR044493	Polynucleotide kinase PNKP, C-terminal phosphatase domain	Domain
A	IPR036412	HAD-like superfamily	Homologous Superfamily
A	IPR023214	HAD superfamily	Homologous Superfamily
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	polynucleotide 5'-hydroxyl-kinase M-CSA #625	This enzyme catalyses 5'-hydroxyl kinase, 3'-phosphatase and 2',3'-cyclic phosphodiesterase activities. These activities modify the ends of nicked tRNA generated by bacterial response to infection. These catalytic activities are dependent on magnesium as a cofactor. The kinase activity resides in an N-terminal domain, whilst the phosphatase activity resides in the C-terminal domain. T4 PNK also has the ability to overcome some bacterial suicide defence mechanisms. It is a member of a family of 5'-kinase/3'-phosphatases that mend broken strands in nucleic acids in conjunction with a RNA/DNA ligase. The kinase domain belongs to the adenylate kinase family whilst the phosphatase domain belongs to the L-2-haloacid dehalogenase.	Defined by 4 residues: LYS:A-15ASP:A-35ARG:A-126ASP:A-165 \| Explore in 3D: M-CSA Motif Definition Extent of motif is too large to support Structure Motif searching. EC: 2.7.1.78 (PDB Primary Data) EC: 3.1.3.34 (UniProt)

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