mRNA of bovine tissue inhibitor of metalloproteinase: sequence and expression in bovine ovarian tissue.

A cDNA library derived from poly(A+)RNA of bovine ovary was screened with a PCR fragment comprising the coding region of human tissue inhibitor of metalloproteinase inhibitor (TIMP). From a number of positive clones, pBGR19, containing a 747 bp insert, was identified and sequenced. The derived amino acid sequence represents that of the precursor of bovine TIMP. Northern analysis reveals a TIMP specific mRNA of 800 bp. Southern analysis indicates that one gene appears to specify bovine TIMP. TIMP mRNA is only weakly expressed in follicular granulosa- and theca cells, whereas luteinization of the follicle is associated with an increase of expression. Expression varies with the stage of the luteal phase; it was highest in stages I and III, but low in stages II and IV of the oestrous cycle.