期刊
JOURNAL OF LIPID RESEARCH
卷 47, 期 9, 页码 1940-1949出版社
ELSEVIER
DOI: 10.1194/jlr.M600185-JLR200
关键词
patatin-like phospholipase; adiponutrin; desnutrin; neuropathy target esterase; phospholipase A2, group VI; Intracellular membrane-associated calcium-independent phospholipase A2 gamma; adipocyte; TaqMan; Affymetrix
Several publications have described biological roles for human patatin-like phospholipases (PNPLAs) in the regulation of adipocyte differentiation. Here, we report on the characterization and expression profiling of 10 human PNPLAs. A variety of bioinformatics approaches were used to identify and characterize all PNPLAs encoded by the human genome. The genes described represent a divergent family, most with a highly conserved ortholog in several mammalian species. In silico characterization predicts that two of the genes function as integral membrane proteins and are regulated by cAMP/cGMP. A structurally guided protein alignment of the patatin-like domain identifies a number of conserved residues in all family members. Quantitative PCR was used to determine the expression profile of each family member. Affymetrix-based profiling of a human preadipocyte cell line identified several members that are differentially regulated during cell differentiation. Cumulative data suggest that patatin-like genes normally expressed at very low levels are induced in response to environmental signals. Given the observed conservation of the patatin fold and lipase motif in all human PNPLAs, a single nomenclature to describe the PNPLA family is proposed.
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