Annotations: 1KDT

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1kdta_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Nucleotide and nucleoside kinases	CMP kinase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1kdtb_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Nucleotide and nucleoside kinases	CMP kinase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8058370	3002021	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8058370	3002021	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	Cytidylate_kin_1	e1kdtA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Cytidylate_kin_1	ECOD (1.6)
B	Cytidylate_kin_1	e1kdtB1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Cytidylate_kin_1	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)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02224	Cytidylate kinase (Cytidylate_kin)	Cytidylate kinase	Cytidylate kinase EC:2.7.4.14 catalyses the phosphorylation of cytidine 5'-monophosphate (dCMP) to cytidine 5'-diphosphate (dCDP) in the presence of ATP or GTP.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	CYTIDYLATE KINASE	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding nucleobase-containing compound kinase activity nucleoside monophosphate kinase activity kinase activity cytidylate kinase activity transferase activity CMP kinase activity catalytic activity phosphotransferase activity, phosphate group as acceptor transferase activity, transferring phosphorus-containing groups guanosine tetraphosphate binding guanyl nucleotide binding guanyl ribonucleotide binding dCMP kinase activity	nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process nucleobase-containing small molecule metabolic process small molecule metabolic process metabolic process primary metabolic process nucleobase-containing small molecule interconversion response to X-ray response to ionizing radiation response to stimulus response to radiation response to abiotic stimulus phosphorylation nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process nucleobase-containing small molecule metabolic process small molecule metabolic process metabolic process primary metabolic process nucleobase-containing small molecule interconversion response to X-ray response to ionizing radiation response to stimulus response to radiation response to abiotic stimulus phosphorylation cellular metabolic process phosphate-containing compound metabolic process cellular process phosphorus metabolic process nucleoside phosphate metabolic process pyrimidine-containing compound metabolic process organonitrogen compound metabolic process nucleotide metabolic process pyrimidine nucleotide metabolic process organophosphate metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR003136	Cytidylate kinase	Family
A, B	IPR011994	Cytidylate kinase domain	Domain
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.