Thrombin-like snake venom serine protease. Displays a specificity similar to trypsin. Releases only fibrinopeptide A in the conversion of fibrinogen to fibrin. Shows coagulant, esterase and amidase activities (By similarity). Reversibly increases the permeability of the blood brain barrier (BBB) in mice. Induces the barrel rotation syndrome in mice, which is manifested by gyroxin-like, rapid rolling motions. This syndrome may be due to its effect on BBB permeability, and certainly also to other actions affecting endogenous substrates present in the endothelium, nervous tissues or blood. Monomer. Expressed by the venom gland. Does not have phospholipase activity, does not aggregate platelet, and does not affect the release of the neurotransmitters dopamine and acetylcholine in the nervous system. Belongs to the peptidase S1 family. Snake venom subfamily. Information taken from PubMed:20637222 and PubMed:11137545 are not linked to a specific sequence. Hence, it is not sure whether the function corresponds to this protein or to a paralog.