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Gene. 1988 Dec 20;73(2):459-68.

Cloning and sequencing of cDNA for the rat plasminogen activator inhibitor-1.

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Department of Human Genetics, University of Michigan Medical School, Ann Arbor 48109-0618.


A cDNA encoding rat plasminogen activator-inhibitor (PAI-1) has been isolated from an HTC rat hepatoma cell cDNA library constructed in phage lambda gt10. The cDNA contains 118 bp of 5'-untranslated sequence, 1206 bp encoding a 402-amino acid (aa) protein and 1747 bp of 3'-untranslated sequence. The protein-coding sequence and the derived amino acid sequence share 82% and 81% identity, respectively, with human PAI-1 cDNA and protein. The rat cDNA encodes a preprotein with a 23-aa leader peptide and a predicted N-terminal serine for the mature protein. Three of four potential N-glycosylation acceptor sites as well as the active site of rat PAI-1 are identical to the human protein. The 3'-untranslated region contains a number of unusual regions, including 80 bp of tandemly repeated GpA dinucleotides, a 115-bp stretch which shares greater than 90% sequence identity with a region within the 3'-untranslated cDNA of human PAI-1, and two 70-bp stretches of highly T-rich sequence located close to the 3'-terminus of the cDNA.

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