Thrombin-like enzyme that shows fibrinogenolytic activity against both the Aalpha (FGA) and Bbeta (FGB) chains of bovine fibrinogen. This enzyme has poor esterolytic activity upon BAEE substrate. It induces mouse thoracic aortic ring contraction with EC(50)=147 nmol/L. It shows vasoconstrictor effects that are independent of the enzymatic activity, but related to the release of calcium ions form the calcium store, potentially through the activation of ryanodine receptors. Inhibited by PMSF, L-cysteine and partially by SBTI and leupeptin. Monomer. Expressed by the venom gland. N-glycosylated at Asn-81 by a disaccharide composed of two N-acetylglucosamine (NAG). The presence of this N-glycan deforms the enzyme and Removing the carbohydrate moiety increases the esterase activity, but induces a complete loss of contractile response on mouse thoracic aorta. Does not have effect on potassium channels and L-type calcium channels in vascular smooth muscle cells. Belongs to the peptidase S1 family. Snake venom subfamily. Extended N-terminus.