Dissolution of Fibrin Clot (Homo sapiens)
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Description
The crosslinked fibrin multimers in a clot are broken down to soluble polypeptides by plasmin, a serine protease. Plasmin can be generated from its inactive precursor plasminogen and recruited to the site of a fibrin clot in two ways, by interaction with tissue plasminogen activator at the surface of a fibrin clot, and by interaction with urokinase plasminogen activator at a cell surface. The first mechanism appears to be the major one responsible for the dissolution of clots within blood vessels. The second, although capable of mediating clot dissolution, may normally play a major role in tissue remodeling, cell migration, and inflammation (Chapman 1997; Lijnen 2001).
Clot dissolution is regulated in two ways. First, efficient plasmin activation and fibrinolysis occur only in complexes formed at the clot surface or on a cell membrane - proteins free in the blood are inefficient catalysts and are rapidly inactivated. Second, both plasminogen activators and plasmin itself are inactivated by specific serpins, proteins that bind to serine proteases to form stable, enzymatically inactive complexes (Kohler and Grant 2000).
These events are outlined in the drawing: black arrows connect the substrates (inputs) and products (outputs) of individual reactions, and blue lines connect output activated enzymes to the other reactions that they catalyze. View original pathway at Reactome.
Clot dissolution is regulated in two ways. First, efficient plasmin activation and fibrinolysis occur only in complexes formed at the clot surface or on a cell membrane - proteins free in the blood are inefficient catalysts and are rapidly inactivated. Second, both plasminogen activators and plasmin itself are inactivated by specific serpins, proteins that bind to serine proteases to form stable, enzymatically inactive complexes (Kohler and Grant 2000).
These events are outlined in the drawing: black arrows connect the substrates (inputs) and products (outputs) of individual reactions, and blue lines connect output activated enzymes to the other reactions that they catalyze. View original pathway at Reactome.
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DataNodes
plasminogen activator
(two-chain):uPARplasminogen activator
(two-chain):uPARmultimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogen activator inhibitor 1multimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogen activator inhibitor 1multimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogencrosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(two-chain)plasminogen activator
(one-chain):uPARplasminogen activator
(two-chain):uPARAnnotated Interactions
plasminogen activator
(two-chain):uPARplasminogen activator
(two-chain):uPARThis reaction takes place in the 'extracellular region' and is mediated by the 'plasminogen activator activity' of 'fibrin multimer, crosslinked:tissue plasminogen activator (two-chain):plasminogen'.
Annexin A2 (ANXA2) is a multicompartmental, multifunctional protein that forms a heterotetramer with its endothelial cell-surface binding partner protein S100-A10 (S100A10) (Rety et al. 1999). The tetramer is able to positively modulate tissue plasminogen activator-dependent activation of the fibrinolytic protease, plasmin from its plasminogen precursor (Luo et al. 2013, Hedhli et al. 2012).
This reaction takes place in the 'extracellular region'.
multimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogen activator inhibitor 1multimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(one-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogen activator inhibitor 1multimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogenmultimer, crosslinked:tissue plasminogen activator
(two-chain):plasminogencrosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(one-chain)crosslinked:tissue plasminogen activator
(two-chain)crosslinked:tissue plasminogen activator
(two-chain)crosslinked:tissue plasminogen activator
(two-chain)crosslinked:tissue plasminogen activator
(two-chain)plasminogen activator
(one-chain):uPARplasminogen activator
(one-chain):uPARplasminogen activator
(one-chain):uPARplasminogen activator
(two-chain):uPARplasminogen activator
(two-chain):uPARplasminogen activator
(two-chain):uPARplasminogen activator
(two-chain):uPAR