Thomas D J, Richards A D, Kay J
Department of Biochemistry, University of Wales College of Cardiff, U.K.
Biochem J. 1989 May 1;259(3):905-7. doi: 10.1042/bj2590905.
The effect of alpha 2-macroglobulin, one of the major antiproteinases in the plasma of vertebrates, on the action of the aspartic proteinases chymosin, cathepsin D and cathepsin E towards peptide and protein substrates at pH 6.2 was examined. Activities towards protein substrates were blocked, thus demonstrating that alpha 2-macroglobulin can inhibit aspartic proteinases, in addition to serine proteinases, cysteine proteinases and metalloproteinases.
研究了α2-巨球蛋白(脊椎动物血浆中主要的抗蛋白酶之一)对天冬氨酸蛋白酶凝乳酶、组织蛋白酶D和组织蛋白酶E在pH 6.2时对肽和蛋白质底物作用的影响。对蛋白质底物的活性被阻断,从而证明α2-巨球蛋白除了能抑制丝氨酸蛋白酶、半胱氨酸蛋白酶和金属蛋白酶外,还能抑制天冬氨酸蛋白酶。