Further characterization of the 5'-flanking DNA of the gene encoding human plasminogen activator inhibitor-1.

Previous nucleotide (nt) sequence analysis of the 5'-flanking DNA of the gene (PAI-1) encoding plasminogen activator inhibitor-1 revealed an extensive region of shared nt sequence identity with the 5'-flanking region of the gene (t-PA) encoding tissue-type plasminogen activator [Bosma et al., J. Biol. Chem. 263 (1988) 9129-9141]. Additional sequence (1642 bp) from the PAI-1 gene 5'-flanking region reveals that these 'PAI-1/t-PA' sequence elements share an alignment that contains a total of 575 positions. This additional PAI-1 5'-flanking sequence also contains two Alu elements that form inverted repeats. Southern-blot analysis using the PAI-1/t-PA element as a probe indicates that this element is repeated in the human genome. which supports the classification of this element as a medium reiteration frequency sequence [Jurka, Nucleic Acids Res. 18 (1990) 137-141].