Lactuca

Snake venom factor V activator (EC 3.4.21.95) is an enzyme.^[1]^[2] This enzyme catalyses the following chemical reaction

Fully activates human clotting factor V by a single cleavage at the Trp-Tyr-Leu-Arg1545-Ser-Asn-Asn-Gly bond.

This enzyme is present in venom of Daboia russelii.

References

^ Kisiel W, Canfield WM (1981). "Snake venom proteases that activate blood-coagulation factor V". Proteolytic Enzymes, Part C. Methods in Enzymology. Vol. 80 Pt C. pp. 275–85. doi:10.1016/s0076-6879(81)80024-9. ISBN 978-0-12-181980-4. PMID 7043192.
^ Tokunaga F, Nagasawa K, Tamura S, Miyata T, Iwanaga S, Kisiel W (November 1988). "The factor V-activating enzyme (RVV-V) from Russell's viper venom. Identification of isoproteins RVV-V alpha, -V beta, and -V gamma and their complete amino acid sequences". The Journal of Biological Chemistry. 263 (33): 17471–81. doi:10.1016/S0021-9258(19)77860-0. PMID 3053712.

Endopeptidases: serine proteases/serine endopeptidases (EC 3.4.21)
Digestive enzymes	Enteropeptidase Trypsin Chymotrypsin Elastase Neutrophil Pancreatic
Coagulation	factors: Thrombin Factor VIIa Factor IXa Factor Xa Factor XIa Factor XIIa Kallikrein PSA KLK1 KLK2 KLK3 KLK4 KLK5 KLK6 KLK7 KLK8 KLK9 KLK10 KLK11 KLK12 KLK13 KLK14 KLK15 fibrinolysis: Plasmin Plasminogen activator Tissue plasminogen activator Urinary plasminogen activator
Complement system	Factor B Factor D Factor I MASP MASP1 MASP2 C3-convertase
Other immune system	Chymase Granzyme Tryptase Proteinase 3/Myeloblastin
Venombin	Ancrod Batroxobin
Other	Acrosin Prolyl endopeptidase Pronase Proprotein convertases 1 2 Prostasin Reelin Subtilisin/Furin/S1P4 Sedolisin/TPP1 Streptokinase Cathepsin A G

Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)