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Full length cDNA sequence encoding canine pancreatic colipase.

Colipase is a heat stable cofactor (- 10 kD) required for binding of lipase to the aqueous-triglyceride interface in the presence of bile salts (1). We present here the full length mRNA sequence of canine pancreatic colipase based on analysis of (a) a partial length cDNA (beginning at nt 77) obtained from a canine cDNA library constructed in pUC-9 (2), (b) exon 1 obtained from a canine genomic library constructed in Lambda-EMBL-3, and (c) primer extension sequencing conducted on canine pancreatic poly(A)+mRNA. The gene encodes a 112 amino acid prepropeptide containing a 17 residue N-terminal signal sequence, a 5 residue propeptide, and a 90 residue mature enzyme sequence. This communication provides the first report on the full length sequence of colipase mRNA and enables further inquiry into the structural similarity between the 5' flanking sequences of the colipase and lipase (3) genes within a single species.