Biology:Dolichol kinase
| dolichol kinase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.7.1.108 | ||||||||
| CAS number | 71768-07-5 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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 Generic protein structure example |
In enzymology, a dolichol kinase (EC 2.7.1.108) is an enzyme that catalyzes the chemical reaction
- CTP + dolichol [math]\displaystyle{ \rightleftharpoons }[/math] CDP + dolichyl phosphate
Thus, the two substrates of this enzyme are CTP and dolichol, whereas its two products are CDP and dolichyl phosphate.
This enzyme belongs to the family of transferases, to be specific, those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor. The systematic name of this enzyme class is CTP:dolichol O-phosphotransferase. This enzyme is also called dolichol phosphokinase. This enzyme participates in N-glycan biosynthesis.
In humans dolichol kinase is encoded by the DOLK gene.[1][2][3]
Function
Dolichyl monophosphate is an essential glycosyl carrier lipid for C- and O-mannosylation and N-glycosylation of proteins and for biosynthesis of glycosylphosphatidylinositol anchors in endoplasmic reticulum (ER). Dolichol kinase catalyzes CTP-mediated phosphorylation of dolichol, the terminal step in de novo dolichyl monophosphate biosynthesis.[4]
Clinical significance
Mutations in DOLK cause a subtype of the congenital disorders of glycosylation, DOLK-CDG (CDG-Im).[5]
See also
References
- ↑ "The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment". Genome Res 13 (10): 2265–70. Oct 2003. doi:10.1101/gr.1293003. PMID 12975309.
- ↑ "Human dolichol kinase, a polytopic endoplasmic reticulum membrane protein with a cytoplasmically oriented CTP-binding site". J Biol Chem 281 (42): 31696–704. Oct 2006. doi:10.1074/jbc.M604087200. PMID 16923818.
- ↑ "Entrez Gene: DOLK dolichol kinase". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=22845.
- ↑ "Expression and characterization of a human cDNA that complements the temperature-sensitive defect in dolichol kinase activity in the yeast sec59-1 mutant: the enzymatic phosphorylation of dolichol and diacylglycerol are catalyzed by separate CTP-mediated kinase activities in Saccharomyces cerevisiae". Glycobiology 12 (9): 555–62. September 2002. doi:10.1093/glycob/cwf068. PMID 12213788. http://doc.rero.ch/record/296696/files/cwf068.pdf.
- ↑ "A defect in dolichol phosphate biosynthesis causes a new inherited disorder with death in early infancy". Am. J. Hum. Genet. 80 (3): 433–40. March 2007. doi:10.1086/512130. PMID 17273964.
Further reading
- "Enzymatic phosphorylation of dolichol in central nervous tissue". J. Biol. Chem. 254 (15): 7129–36. 1979. doi:10.1016/S0021-9258(18)50294-5. PMID 457672.
- "Properties of a dolichol phosphokinase activity associated with rat liver microsomes". Can. J. Biochem. 58 (10): 1051–6. 1980. doi:10.1139/o80-142. PMID 6257336.
- "A defect in dolichol phosphate biosynthesis causes a new inherited disorder with death in early infancy.". Am. J. Hum. Genet. 80 (3): 433–40. 2007. doi:10.1086/512130. PMID 17273964.
- "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. 2004. doi:10.1101/gr.2596504. PMID 15489334.
- "DNA sequence and analysis of human chromosome 9.". Nature 429 (6990): 369–74. 2004. doi:10.1038/nature02465. PMID 15164053. Bibcode: 2004Natur.429..369H.
- "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. 2003. doi:10.1073/pnas.242603899. PMID 12477932. Bibcode: 2002PNAS...9916899M.
- "Prediction of the coding sequences of unidentified human genes. XIV. The complete sequences of 100 new cDNA clones from brain which code for large proteins in vitro.". DNA Res. 6 (3): 197–205. 1999. doi:10.1093/dnares/6.3.197. PMID 10470851.
External links
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