Biomaterial Database

A direct-acting fibrinolytic enzyme from the venom of Agkistrodon contortrix contortrix: effects on various components of the human blood coagulation and fibrinolysis systems. 1988

A D Retzios, and F S Markland

University of Southern California School of Medicine, Department of Biochemistry, Los Angeles.

A direct acting fibrinolytic enzyme (fibrolase) has been isolated from venom of the southern copperhead snake (Agkistrodon contortrix contortrix). Time-course experiments established that the venom enzyme cleaves primarily the A alpha-chain of human fibrinogen and fibrin between the Lys-413 and Leu-414 position. The B beta-chain is cleaved more slowly, while the gamma-chain is minimally affected. The cleavage pattern of fibrinogen and fibrin clearly varies from plasmin cleavage of the same molecules. The enzyme does not activate plasminogen or protein c and it is thus different from "Protac", a protein c activator isolated from the same venom.

UI	MeSH Term	Description	Entries
D008666	Metalloendopeptidases	ENDOPEPTIDASES which use a metal such as ZINC in the catalytic mechanism.	Metallo-Endoproteinases,Metalloendopeptidase
D010958	Plasminogen	Precursor of plasmin (FIBRINOLYSIN). It is a single-chain beta-globulin of molecular weight 80-90,000 found mostly in association with fibrinogen in plasma; plasminogen activators change it to fibrinolysin. It is used in wound debriding and has been investigated as a thrombolytic agent.	Profibrinolysin,Glu-Plasminogen,Glutamic Acid 1-Plasminogen,Glutamyl Plasminogen,1-Plasminogen, Glutamic Acid,Glu Plasminogen,Glutamic Acid 1 Plasminogen,Plasminogen, Glutamyl
D011486	Protein C	A vitamin-K dependent zymogen present in the blood, which, upon activation by thrombin and thrombomodulin exerts anticoagulant properties by inactivating factors Va and VIIIa at the rate-limiting steps of thrombin formation.
D001777	Blood Coagulation	The process of the interaction of BLOOD COAGULATION FACTORS that results in an insoluble FIBRIN clot.	Blood Clotting,Coagulation, Blood,Blood Clottings,Clotting, Blood
D001798	Blood Proteins	Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins.	Blood Protein,Plasma Protein,Plasma Proteins,Serum Protein,Serum Proteins,Protein, Blood,Protein, Plasma,Protein, Serum,Proteins, Blood,Proteins, Plasma,Proteins, Serum
D003435	Crotalid Venoms	Venoms from snakes of the subfamily Crotalinae or pit vipers, found mostly in the Americas. They include the rattlesnake, cottonmouth, fer-de-lance, bushmaster, and American copperhead. Their venoms contain nontoxic proteins, cardio-, hemo-, cyto-, and neurotoxins, and many enzymes, especially phospholipases A. Many of the toxins have been characterized.	Bothrops Venom,Crotalidae Venoms,Pit Viper Venoms,Rattlesnake Venoms,Crotactin,Crotalid Venom,Crotalin,Crotaline Snake Venom,Crotalotoxin,Crotamin,Pit Viper Venom,Rattlesnake Venom,Snake Venom, Crotaline,Venom, Bothrops,Venom, Crotalid,Venom, Crotaline Snake,Venom, Pit Viper,Venom, Rattlesnake,Venoms, Crotalid,Venoms, Crotalidae,Venoms, Pit Viper,Venoms, Rattlesnake,Viper Venom, Pit
D004591	Electrophoresis, Polyacrylamide Gel	Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.	Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D005338	Fibrin Fibrinogen Degradation Products	Soluble protein fragments formed by the proteolytic action of plasmin on fibrin or fibrinogen. FDP and their complexes profoundly impair the hemostatic process and are a major cause of hemorrhage in intravascular coagulation and fibrinolysis.	Antithrombin VI,Fibrin Degradation Product,Fibrin Degradation Products,Fibrin Fibrinogen Split Products,Degradation Product, Fibrin,Degradation Products, Fibrin,Product, Fibrin Degradation
D005340	Fibrinogen	Plasma glycoprotein clotted by thrombin, composed of a dimer of three non-identical pairs of polypeptide chains (alpha, beta, gamma) held together by disulfide bonds. Fibrinogen clotting is a sol-gel change involving complex molecular arrangements: whereas fibrinogen is cleaved by thrombin to form polypeptides A and B, the proteolytic action of other enzymes yields different fibrinogen degradation products.	Coagulation Factor I,Factor I,Blood Coagulation Factor I,gamma-Fibrinogen,Factor I, Coagulation,gamma Fibrinogen
D005342	Fibrinolysis	The natural enzymatic dissolution of FIBRIN.	Fibrinolyses