Diacylglycerol kinase (DGK, EC 18.104.22.168) is a lipid kinase that phosphorylates diacylglycerol (DAG) to generate phosphatidic acid (PA). DGK belongs to a well-conserved family of proteins found in diverse species, such as Saccharomyces cerevisiae, Drosophila melanogaster, Caenorhabditis elegans, mammals, plants, and bacteria (Merida et al. Biochem J 409:1–18, 2008). In eukaryotes, DGK can be activated in response to various stimuli, and its product PA is emerging as a novel lipid second messenger (Munnik, Trends Plant Sci 6:227–233, 2001; Testerink and Munnik, Trends Plant Sci 10:368–375, 2005). Despite similarities to the mammalian system, plant DGKs display several distinctive features.
KeywordsPhosphatidic Acid Phosphatidic Acid Diacylglycerol Kinase Phosphatidic Acid Phosphatase Cold Shock Treatment
- Arisz SA, Testerink C, Munnik T (2009) Plant PA signaling via diacylglycerol kinase. Biochim Biophys Acta 1791:869–875Google Scholar
- Gomez-Merino FC, Brearley CA, Ornatowska M, Abdel-Haliem ME, Zanor MI, Mueller-Roeber B (2004) AtDGK2, a novel diacylglycerol kinase from Arabidopsis thaliana, phosphorylates 1-stearoyl-2-arachidonoyl-sn-glycerol and 1, 2-dioleoyl-sn-glycerol and exhibits cold-inducible gene expression. J Biol Chem 279:8230–8241CrossRefPubMedGoogle Scholar
- Gomez-Merino FC, Arana-Ceballos FA, Trejo-Tellez LI, Skirycz A, Brearley CA, Dormann P, Mueller-Roeber B (2005) Arabidopsis AtDGK7, the smallest member of plant diacylglycerol kinases (DGKs), displays unique biochemical features and saturates at low substrate concentration: the DGK inhibitor R59022 differentially affects AtDGK2 and AtDGK7 activity in vitro and alters plant growth and development. J Biol Chem 280:34888–34899CrossRefPubMedGoogle Scholar
- Vergnolle C, Vaultier MN, Taconnat L, Renou JP, Kader JC, Zachowski A, Ruelland E (2005) The cold-induced early activation of phospholipase C and D pathways determines the response of two distinct clusters of genes in Arabidopsis cell suspensions. Plant Physiol 139:1217–1233CrossRefPubMedGoogle Scholar
- Wang W, Yang X, Tangchaiburana S, Ndeh R, Markham JE, Tsegaye Y, Dunn TM, Wang GL, Bellizzi M, Parsons JF, Morrissey D, Bravo JE, Lynch DV, Xiao S (2008) An inositolphosphorylceramide synthase is involved in regulation of plant programmed cell death associated with defense in Arabidopsis. Plant Cell 20:3163–3179CrossRefPubMedGoogle Scholar