Chromophore-Linked Substrate (CLS405): Probing Metallo-β-Lactamase Activity and Inhibition
作者:Anne Makena、Sander S. van Berkel、Clarisse Lejeune、Raymond J. Owens、Anil Verma、Ramya Salimraj、James Spencer、Jürgen Brem、Christopher J. Schofield
DOI:10.1002/cmdc.201300350
日期:2013.12
5‐dioxide (CLS405) was synthesised in a three‐step protocol. CLS405 was then characterised spectroscopically, and its stability and kinetic properties evaluated. With a Δλmax value of 100 nm between the parent and hydrolysis product, a higher analytical accuracy is possible with CLS405 than with commonly used chromogenic substrates. The use of CLS405 in assays was validated by MBL activity measurements
丝氨酸和金属β-内酰胺酶对几乎所有β-内酰胺类抗生素的临床使用构成威胁,包括青霉素、头孢菌素和碳青霉烯类。开发金属-β-内酰胺酶 (MBL) 抑制剂的努力需要合适的筛选平台,以便快速测定 β-内酰胺酶活性和有效抑制。不幸的是,目前可用的平台并不适合此目的。MBL 抑制剂鉴定的进一步进展需要廉价且广泛适用的检测方法。本文描述了一种廉价且稳定的显色底物的鉴定,该底物适用于临床相关 MBL 的测定。(6 R ,7 R)-3-((4-Nitrophenoxy)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxy acid 5,5 ‐二氧化物 (CLS405) 采用三步法合成。然后对 CLS405 进行光谱表征,并评估其稳定性和动力学特性。由于母体和水解产物之间的 Δ λ最大值为 100 nm,CLS405