Induction of mRNA for a serine protease and a beta-thromboglobulin-like protein in mitogen-stimulated human leukocytes.
Two cDNA clones corresponding to genes that are induced at least 10-fold in peripheral human blood leukocytes by staphylococcal enterotoxin A were isolated and sequenced. Clone 1-3E encodes a 247-residue protein that comprises a putative signal sequence, and resembles a serine protease; the cognate mRNA is expressed in T lymphocyte clones but in none of the other human cell lines tested. The deduced protein sequence is most closely related (68% homology) to that of the postulated protease CCPI from activated murine cytotoxic T lymphocytes and to that of rat mast cell protease II (47% homology). The other cDNA, 3-10C, encodes a protein of 99 residues that resembles human beta-thromboglobulin (42% homology); the cognate mRNA was also found in SEA-stimulated U937 cells, a histiocytic lymphoma-derived cell line.[1]References
- Induction of mRNA for a serine protease and a beta-thromboglobulin-like protein in mitogen-stimulated human leukocytes. Schmid, J., Weissmann, C. J. Immunol. (1987) [Pubmed]
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