Alpha 2-antiplasmin

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Template:Infobox gene Alpha 2-antiplasmin (or α2-antiplasmin or plasmin inhibitor) is a serine protease inhibitor (serpin) responsible for inactivating plasmin. Plasmin is an important enzyme that participates in fibrinolysis and degradation of various other proteins. This protein is encoded by the SERPINF2 gene.[1]

Fibrinolysis (simplified). Blue arrows denote stimulation, and red arrows inhibition.

Role in disease

Very few cases (<20) of A2AP deficiency have been described. As plasmin degrades blood clots, impaired inhibition of plasmin leads to a bleeding tendency, which was severe in the cases reported.

In liver cirrhosis, there is decreased production of alpha 2-antiplasmin, leading to decreased inactivation of plasmin and an increase in fibrinolysis. This is associated with an increase risk of bleeding in liver disease.[2]


Alpha 2-antiplasmin has been shown to interact with:

See also


  1. "Entrez Gene: SERPINF2 serpin peptidase inhibitor, clade F (alpha-2 antiplasmin, pigment epithelium derived factor), member 2". 
  2. Sattar, Husain. Fundamentals of Pathology. Pathoma LLC, 2011, p. 36.
  3. 3.0 3.1 Shieh BH, Travis J (May 1987). "The reactive site of human alpha 2-antiplasmin". The Journal of Biological Chemistry. 262 (13): 6055–9. PMID 2437112. 
  4. Brower MS, Harpel PC (Aug 1982). "Proteolytic cleavage and inactivation of alpha 2-plasmin inhibitor and C1 inactivator by human polymorphonuclear leukocyte elastase". The Journal of Biological Chemistry. 257 (16): 9849–54. PMID 6980881. 
  5. Wiman B, Collen D (Sep 1979). "On the mechanism of the reaction between human alpha 2-antiplasmin and plasmin". The Journal of Biological Chemistry. 254 (18): 9291–7. PMID 158022. 

Further reading

External links