Reference: Van Heusden GP, et al. (1998) The Saccharomyces cerevisiae TGL2 gene encodes a protein with lipolytic activity and can complement an Escherichia coli diacylglycerol kinase disruptant. Yeast 14(3):225-32

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Abstract


Escherichia coli cells with a disrupted diacylglycerol kinase gene are unable to grow on media containing arbutin due to a lethal accumulation of diacylglycerol. In order to isolate genes from the yeast Saccharomyces cerevisiae involved in diacylglycerol metabolism we complemented an E. coli diacylglycerol kinase disruptant with a yeast genomic library and transformants were selected capable of growing in the presence of arbutin. Using this method, a gene (TGL2) was isolated coding for a protein resembling lipases from Pseudomonas. After expression of the TGL2 gene in E. coli, lipolytic activity towards triacylglycerols and diacylglycerols with short-chain fatty acids could be measured. Therefore, it is very likely that the TGL2 gene can complement the E. coli diacylglycerol kinase disruptant, because it encodes a protein that degrades the diacylglycerol accumulated after growth in the presence of arbutin. Disruption of the TGL2 gene in S. cerevisiae did not result in a detectable phenotype. The role of the Tgl2 protein in lipid degradation in yeast is still unclear.

Reference Type
Journal Article
Authors
Van Heusden GP, Nebohâcovâ M, Overbeeke TL, Steensma HY
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