ADK (gene)

Adenosine kinase

PDB rendering based on 1bx4.

Available structures

Ortholog search: PDBe, RCSB

List of PDB id codes
1BX4, 2I6A, 2I6B, 4O1L

Identifiers

Symbols

ADK ; AK

External IDs

OMIM: 102750 MGI: 87930 HomoloGene: 4891 IUPHAR: 1231 ChEMBL: 3589 GeneCards: ADK Gene

EC number

2.7.1.20

Gene ontology
Molecular function	• adenosine kinase activity • ATP binding • phosphotransferase activity, alcohol group as acceptor • poly(A) RNA binding • metal ion binding
Cellular component	• nucleoplasm • cytoplasm • cytosol
Biological process	• purine nucleobase metabolic process • dATP biosynthetic process • ribonucleoside monophosphate biosynthetic process • phosphorylation • purine-containing compound salvage • AMP salvage • small molecule metabolic process • nucleobase-containing small molecule metabolic process
Sources: Amigo / QuickGO

Orthologs

Species

Human

Mouse

132

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 10:
74.15 – 74.71 Mb

Chr 14:
21.05 – 21.45 Mb

PubMed search

Adenosine kinase is an enzyme that in humans is encoded by the ADK gene.^[1]^[2]

Function

This gene encodes adenosine kinase, an abundant enzyme in mammalian tissues. The enzyme catalyzes the transfer of the gamma-phosphate from ATP to adenosine, thereby serving as a regulator of concentrations of both extracellular adenosine and intracellular adenine nucleotides. Adenosine has widespread effects on the cardiovascular, nervous, respiratory, and immune systems and inhibitors of the enzyme could play an important pharmacological role in increasing intravascular adenosine concentrations and acting as anti-inflammatory agents. Alternative splicing results in two transcript variants encoding different isoforms. Both isoforms of the enzyme phosphorylate adenosine with identical kinetics and both require Mg²⁺ for activity.^[2]

References

↑ Spychala J, Datta NS, Takabayashi K, Datta M, Fox IH, Gribbin T, Mitchell BS (Mar 1996). "Cloning of human adenosine kinase cDNA: sequence similarity to microbial ribokinases and fructokinases". Proc Natl Acad Sci U S A 93 (3): 1232–7. doi:10.1073/pnas.93.3.1232. PMC 40062. PMID 8577746.
1 2 "Entrez Gene: ADK adenosine kinase".

Klobutcher LA, Nichols EA, Kucherlapati RS, Ruddle FH (1976). "Assignment of the gene for human adenosine kinase to chromosome 10 using a somatic cell hybrid clone panel.". Cytogenet. Cell Genet. 16 (1–5): 171–4. doi:10.1159/000130582. PMID 185014.
Singh B, Hao W, Wu Z; et al. (1996). "Cloning and characterization of cDNA for adenosine kinase from mammalian (Chinese hamster, mouse, human and rat) species. High frequency mutants of Chinese hamster ovary cells involve structural alterations in the gene". Eur. J. Biochem. 241 (2): 564–71. doi:10.1111/j.1432-1033.1995.tb20220.x_1. PMID 8917457.
McNally T, Helfrich RJ, Cowart M; et al. (1997). "Cloning and expression of the adenosine kinase gene from rat and human tissues". Biochem. Biophys. Res. Commun. 231 (3): 645–50. doi:10.1006/bbrc.1997.6157. PMID 9070863.
Mathews II, Erion MD, Ealick SE (1998). "Structure of human adenosine kinase at 1.5 A resolution". Biochemistry 37 (45): 15607–20. doi:10.1021/bi9815445. PMID 9843365.
Van Rompay AR, Johansson M, Karlsson A (1999). "Identification of a novel human adenylate kinase. cDNA cloning, expression analysis, chromosome localization and characterization of the recombinant protein". Eur. J. Biochem. 261 (2): 509–17. doi:10.1046/j.1432-1327.1999.00294.x. PMID 10215863.
Singh B, Lin A, Wu ZC, Gupta RS (2001). "Gene structure for adenosine kinase in Chinese hamster and human: high-frequency mutants of CHO cells involve deletions of several introns and exons". DNA Cell Biol. 20 (1): 53–65. doi:10.1089/10445490150504693. PMID 11242543.
Maguire PB, Wynne KJ, Harney DF; et al. (2003). "Identification of the phosphotyrosine proteome from thrombin activated platelets". Proteomics 2 (6): 642–8. doi:10.1002/1615-9861(200206)2:6<642::AID-PROT642>3.0.CO;2-I. PMID 12112843.
Strausberg RL, Feingold EA, Grouse LH; et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
Szkotak AJ, Ng AM, Man SF; et al. (2003). "Coupling of CFTR-mediated anion secretion to nucleoside transporters and adenosine homeostasis in Calu-3 cells". J. Membr. Biol. 192 (3): 169–79. doi:10.1007/s00232-002-1073-x. PMID 12820662.
Gerhard DS, Wagner L, Feingold EA; et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.

PDB gallery

1bx4: STRUCTURE OF HUMAN ADENOSINE KINASE AT 1.50 ANGSTROMS

2i6a: Human Adenosine Kinase in Complex With 5'-Deoxy-5-Iodotubercidin

2i6b: Human Adenosine Kinase in Complex with An Acetylinic Inhibitor

Transferases: phosphorus-containing groups (EC 2.7)

2.7.1-2.7.4:
phosphotransferase/kinase
(PO₄)

2.7.1: OH acceptor	Hexo- Gluco- Fructo- Hepatic Galacto- Phosphofructo- 1 Liver Muscle Platelet 2 Riboflavin Shikimate Thymidine ADP-thymidine NAD⁺ Glycerol Pantothenate Mevalonate Pyruvate Deoxycytidine PFP Diacylglycerol Phosphoinositide 3 Class I PI 3 Class II PI 3 Sphingosine Glucose-1,6-bisphosphate synthase

2.7.2: COOH acceptor	Phosphoglycerate Aspartate kinase

2.7.3: N acceptor	Creatine

2.7.4: PO₄ acceptor	Phosphomevalonate Adenylate Nucleoside-diphosphate Uridylate Guanylate Thiamine-diphosphate

2.7.6: diphosphotransferase
(P₂O₇)

2.7.7: nucleotidyltransferase
(PO₄-nucleoside)

Polymerase

DNA polymerase	DNA-directed DNA polymerase I II III IV V RNA-directed DNA polymerase Reverse transcriptase Telomerase DNA nucleotidylexotransferase/Terminal deoxynucleotidyl transferase

RNA nucleotidyltransferase	RNA polymerase/DNA-directed RNA polymerase RNA polymerase I RNA polymerase II RNA polymerase III RNA polymerase IV Primase RNA-dependent RNA polymerase PNPase

Phosphorolytic
3' to 5' exoribonuclease

Nucleotidyltransferase

Guanylyltransferase

mRNA capping enzyme

Other

2.7.8: miscellaneous

Phosphatidyltransferases	CDP-diacylglycerol—glycerol-3-phosphate 3-phosphatidyltransferase CDP-diacylglycerol—serine O-phosphatidyltransferase CDP-diacylglycerol—inositol 3-phosphatidyltransferase CDP-diacylglycerol—choline O-phosphatidyltransferase

Glycosyl-1-phosphotransferase	N-acetylglucosamine-1-phosphate transferase

2.7.10-2.7.13: protein kinase
(PO₄; protein acceptor)

2.7.10: protein-tyrosine	see tyrosine kinases

2.7.11: protein-serine/threonine	see serine/threonine-specific protein kinases

2.7.12: protein-dual-specificity	see serine/threonine-specific protein kinases

2.7.13: protein-histidine	Protein-histidine pros-kinase Protein-histidine tele-kinase Histidine kinase

Proteins: enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases(list) EC2 Transferases(list) EC3 Hydrolases(list) EC4 Lyases(list) EC5 Isomerases(list) EC6 Ligases(list)

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ADK (gene)

Function

References

Further reading