Thrombin substrates and ligands1-3
Thrombin substrate or binding partner . | ABE I . | ABE II . | Comments . |
---|---|---|---|
Fibrinogen | + | — | |
Fibrinogen-γ′ | + | + | 10% of total fibrinogen contains γ′ chains |
FV | + | + | IIa residues outside ABEs also involved |
FVIII | + | + | IIa residues outside ABEs also involved |
FXIII | — | — | Fibrin accelerates 80-fold |
Protein C | — | — | Thrombomodulin facilitates interaction |
TAFI | — | — | Thrombomodulin facilitates interaction |
Heparin | — | + | |
Antithrombin | — | — | Heparin facilitates interaction |
Heparin cofactor II | + | — | Heparin facilitates interaction |
Thrombomodulin | + | + | Glycosaminoglycans interact with ABE II |
Glycoprotein 1bα | — | + | — |
PAR-1 | + | — | — |
PAR-4 | + | — | — |
Thrombin substrate or binding partner . | ABE I . | ABE II . | Comments . |
---|---|---|---|
Fibrinogen | + | — | |
Fibrinogen-γ′ | + | + | 10% of total fibrinogen contains γ′ chains |
FV | + | + | IIa residues outside ABEs also involved |
FVIII | + | + | IIa residues outside ABEs also involved |
FXIII | — | — | Fibrin accelerates 80-fold |
Protein C | — | — | Thrombomodulin facilitates interaction |
TAFI | — | — | Thrombomodulin facilitates interaction |
Heparin | — | + | |
Antithrombin | — | — | Heparin facilitates interaction |
Heparin cofactor II | + | — | Heparin facilitates interaction |
Thrombomodulin | + | + | Glycosaminoglycans interact with ABE II |
Glycoprotein 1bα | — | + | — |
PAR-1 | + | — | — |
PAR-4 | + | — | — |
+ indicates that ABE I or ABE II is required for the interaction; and —, an ABE interaction is not required.