Title : The antithrombin P1 residue is important for target proteinase specificity but not for heparin activation of the serpin. Characterization of P1 antithrombin variants with altered proteinase specificity but normal heparin activation.

Pub. Date : 2001 Jun 5

PMID : 11380262






1 Functional Relationships(s)
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1 As expected, mutation of the P1 arginine to tryptophan, histidine, leucine, and methionine converted the specificity of antithrombin from a trypsin inhibitor (k(assoc) = 2 x 10(5) M(-1) s(-1)) to a chymotrypsin inhibitor (k(assoc) = 10(3)-10(5) M(-1) s(-1)). Tryptophan serpin family C member 1 Homo sapiens