A method is provided for determining the activity of an enzyme which releases methylumbelliferone (MU) from an MU-containing substrate wherein the enzyme has a pH optimum below the pKa of MU comprising: contacting a sample suspected of containing the enzyme with the MU-containing substrate at a pH suitable for activity of the enzyme to allow release of MU by the enzyme; contacting the sample with light of a wavelength in the range of about 310 nm to about 350 nm; determining fluorescence produced by the released MU, thereby determining the activity of the enzyme. This real time method provides improved diagnostic methods, for example for diseases associated with an abnormal level of activity of a glycosidase. The real time assay also can be used to screen compounds for their ability to modulate enzyme activity using MU-containing substrates.
提供了一种确定酶活性的方法,该酶可从含 MU 的底物中释放甲基伞形酮(MU),其中酶的 pH 最适值低于 MU 的 pKa,该方法包括在适合酶活性的 pH 值下,将疑似含有酶的样品与含 MU 的底物接触,使酶释放 MU;将样品与波长在约 310 nm 至约 350 nm 范围内的光接触;确定释放的 MU 产生的荧光,从而确定酶的活性。这种实时方法提供了改进的诊断方法,例如用于诊断与糖苷酶活性水平异常有关的疾病。这种实时检测法还可用于筛选化合物,以确定它们利用含 MU 底物调节酶活性的能力。
Substituted Sulfanilamidopyrimidines<sup>1</sup>
作者:William Braker、Edward J. Pribyl、John T. Sheehan、Ervin R. Spitzmiller、W. A. Lott
DOI:10.1021/ja01204a044
日期:1947.12
US7488721B2
申请人:——
公开号:US7488721B2
公开(公告)日:2009-02-10
[EN] NOVEL PYRIMIDIN-2-YL SULFONAMIDE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE PYRIMIDIN-2-YL SULFONAMIDE
申请人:HOFFMANN LA ROCHE
公开号:WO2022180136A1
公开(公告)日:2022-09-01
The invention relates to novel compounds having the general formula (I), wherein R1, R2, R3, R4, X1and X2are as described herein, composition including the compounds and methods of using the compounds.