There is provided a method for determining the activity of a protease in a sample. The method comprises (i) admixing said sample with a substrate, wherein the substrate has the formula (1a) wherein: R
1
is a hydrocarbyl group; R
2
is a first peptide moiety; R
3
is a second peptide moiety and X is selected from the group consisting of O, S and NH; Y
1
is a suitable substituent; Y
2
is a suitable substituent; and (ii) determining the activity of said protease by detecting the presence of a reporter having the formula H—X—R
1
, wherein: X is selected from the group consisting of O, S and NH; R
1
is a hydrocarbyl group. The substrate and reporter are useful for determining the efficacy of protease-modulators and candidate protease-modulators and in the diagnosis of a disease or disorder in a subject.
提供了一种测定样品中
蛋白酶活性的方法。该方法包括(i)将所述样品与底物混合,其中所述底物具有式(1a),其中:R1是一个烃基;R2是第一肽基;R3是第二肽基,X选自O、S和NH组成的群;Y1是适当的取代基;Y2是适当的取代基;和(ii)通过检测具有式H-X-R1的报告物的存在来确定所述
蛋白酶的活性,其中:X选自O、S和NH组成的群;R1是一个烃基。该底物和报告物有助于确定
蛋白酶调节剂和候选
蛋白酶调节剂的功效,并用于诊断主体的疾病或障碍。