3.4.21.21 306X mutation studies show that the interaction between protein cofactor tissue factor and methionine-306 in the serine protease domain of FVIIa triggers the activation process and suggested some ensuing steps on the pathway to the active conformation 710606 3.4.21.21 A294V mutant enzyme shows delayed activation by activated factor X as well as reduced activity towards peptidyl and macromolecular substrates without impairing the catalytic efficiency of the triad 654496 3.4.21.21 C164V/V299C-FVIIa introduction of a new disulfide bridge between Cys-159 and an introduced Cys at position 299 667588 3.4.21.21 D102Q inactive mutant enzyme 654583 3.4.21.21 D186A turnover-number for activation of factor X is 5.5fold lower than that of the wild-type factor VII, Km-value for activation of factor X is 1.2fold lower than that of the wild-type factor VII 654583 3.4.21.21 D343H mutant enzyme shows no activity with methanesulfonyl-D-cyclohexylalanyl-butyl-arginine p-nitroanilide, factor X and factor IX 654508 3.4.21.21 D72N the mutant shows 13% of wild type FVIIa signaling activity towards protease-activated receptor 2 717790 3.4.21.21 DELTA360-329 lower affinity for soluble tissue factor as compared to wild-type factor VIIa, 7fold smaller tissue factor-mediated acceleration of amidolytic activity compared to wild type factor VIIa 656000 3.4.21.21 E154A slightly increased Km-value and decreased turnover number compared to the wild-type enzyme 95334 3.4.21.21 E154R site-directed mutagenesis, activity and active site structure in comparison to the wild-type 683477