Cloning and characterization of human pancreatic lipase cDNA.

Article Details

Citation

Lowe ME, Rosenblum JL, Strauss AW

Cloning and characterization of human pancreatic lipase cDNA.

J Biol Chem. 1989 Nov 25;264(33):20042-8.

PubMed ID
2479644 [ View in PubMed
]
Abstract

Pancreatic lipase (triacylglycerol acylhydrolase, EC 3.1.1.3) hydrolyzes dietary long chain triacylglycerol to free fatty acids and monoacylglycerols in the intestinal lumen. In the presence of bile acids, the activity of lipase is stimulated by colipase. As a prelude to studying the relationship of the protein structures to the functional properties of lipase and colipase, a cDNA encoding human pancreatic lipase was isolated from a lambda gt11 cDNA library screened with a rabbit polyclonal anti-human pancreatic lipase antibody. The full length cDNA clone of 1477 base pairs contained an open reading frame encoding a 465-amino acid protein, including a 16-amino acid signal peptide. The nucleotide sequence was 69% identical to the dog pancreatic lipase cDNA. The predicted NH2-terminal protein sequence agreed with the published NH2-terminal sequence of human pancreatic lipase and the predicted protein sequence was 85 and 70% identical to the protein sequences of pig and dog pancreatic lipase, respectively. A region of homology around Ser-153 is conserved in a number of lipid-binding proteins. Human hepatic lipase and lipoprotein lipase share extensive homology with pancreatic lipase, suggesting that the three proteins are members of a small gene family. In vitro translation of mRNA transcribed from the cDNA resulted in a protein of the expected molecular size that could be processed by microsomal membranes to yield a glycolated protein with proper signal peptide cleavage. RNA blot analysis demonstrated tissue specificity for pancreatic lipase. Thus, for the first time, a full length human pancreatic lipase cDNA has been isolated and characterized. The demonstrated regions of homology with other lipases will aid definition of interactions with substrate and colipase through site-specific mutagenesis.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Pancreatic triacylglycerol lipaseP16233Details