Interaction of antithrombin III and thrombin-antithrombin III complex with cultured aortic endothelial cells. 1987

K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
2nd Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary.

The binding of antithrombin III, thrombin, thrombin-antithrombin III complex to endothelial cells was investigated. While the rate of the binding of thrombin to these cells was very rapid, that of antithrombin III was relatively slow and the thrombin-antithrombin III complex was intermediate. Binding kinetics indicated that antithrombin III, like thrombin, showed high affinity to endothelial cells; with a Kd of 3 X 10(-8) M and with 5 X 10(4) binding sites per cell. The dissociation of the inhibitor molecule was also rapid, i.e., approximately 70% bound antithrombin III was released in 2 minutes. Heparin, in a 100-fold molar excess to antithrombin III, or the modification of lysine residues of the inhibitor involved in the interaction with heparin, did not influence the association of antithrombin III with endothelial cells. In addition, antithrombin III did not compete with thrombin blocked in its active center for binding to endothelial cells. It is suggested that the binding sites of endothelial cells are different for thrombin and antithrombin III, and antithrombin III does not bind to these cells through its heparin binding domain.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D004730 Endothelium, Vascular Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components. Capillary Endothelium,Vascular Endothelium,Capillary Endotheliums,Endothelium, Capillary,Endotheliums, Capillary,Endotheliums, Vascular,Vascular Endotheliums
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000990 Antithrombin III A plasma alpha 2 glycoprotein that accounts for the major antithrombin activity of normal plasma and also inhibits several other enzymes. It is a member of the serpin superfamily. Heparin Cofactor I,Antithrombin III-Alpha,Atenativ,Heparin Co-Factor I,Kybernin,Serpin C1,Thrombate III,Antithrombin III Alpha,Antithrombin IIIAlpha,Cofactor I, Heparin,Heparin Co Factor I
D001665 Binding Sites The parts of a macromolecule that directly participate in its specific combination with another molecule. Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining
D013917 Thrombin An enzyme formed from PROTHROMBIN that converts FIBRINOGEN to FIBRIN. Thrombase,Thrombin JMI,Thrombin-JMI,Thrombinar,Thrombostat,alpha-Thrombin,beta,gamma-Thrombin,beta-Thrombin,gamma-Thrombin,JMI, Thrombin

Related Publications

K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
April 1988, Thrombosis research,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
October 1989, Thrombosis research,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
September 1989, Biochemical and biophysical research communications,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
August 1989, Biochimica et biophysica acta,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
January 1977, Federation proceedings,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
March 1995, Nihon rinsho. Japanese journal of clinical medicine,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
January 2017, Journal of orthopaedic surgery (Hong Kong),
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
September 1999, Nihon rinsho. Japanese journal of clinical medicine,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
June 1991, Thrombosis research,
K Bartha, and T Kovács, and I Léránt, and B Papp, and E Csonka, and K Kolev, and R Machovich
October 1991, Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis,
Copied contents to your clipboard!