Most important serine protease inhibitor in plasma that regulates the blood coagulation cascade (PubMed:15140129, PubMed:15853774). AT-III inhibits thrombin, matriptase-3/TMPRSS7, as well as factors IXa, Xa and XIa (PubMed:15140129). Its inhibitory activity is greatly enhanced in the presence of heparin. {ECO:0000269|PubMed:15140129, ECO:0000269|PubMed:15853774}.

Associated with:

Matrix Type

  • Plasma
  • Tissue/Cells

Gene Symbol


UniProt ID

  • P01008

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