T-Kininogen 1 (KNT1)

T-kininogen, the acute phase kininogen of the rat, could be a healing protein because of its properties as a cysteine protease inhibitor. Evidence is also presented that mRNA of T-kininogen synthesis may be a function of interleukin 6 production. In rats, four types of kininogens are produced, two of which are classical high and low molecular weight kininogens and two of which are low molecular weight-like kininogens, designated T-kininogen 1 and T-kininogen 2. T-kininogen 1 and T-kininogen 2 are 430 amino acid secreted rat proteins that each contain three cystatin domains and have nearly identical functions. Existing in plasma, both T-kininogen 1 and T-kininogen 2 are glycoproteins that act as thiol protease inhibitors and also play a role in blood coagulation, specifically by helping to optimally position blood coagulation factors.