期刊
JOURNAL OF PROTEOME RESEARCH
卷 1, 期 1, 页码 35-40出版社
AMER CHEMICAL SOC
DOI: 10.1021/pr015506a
关键词
activity probe; labeling; protein tyrosine phosphatase; PTP1B; proteomics; quinone methide; signaling
Two mechanism-based activity probes, adopting a cassette-like design, for protein tyrosine phosphatases (PTPs) were synthesized. Both probes carry a phosphate group that serves as the recognition head for the target PTPs but differ in their reporter groups; probe LCL-1 uses a dansyl fluorophore, while LCL-2 has a biotin reporter group. LCL-1 and LCL-2 are specifically activated by phosphatase, leading to its covalent labeling, as exemplified with PTP-1B. However, they show no activation with other classes of hydrolases, including trypsin and beta-galactosidase. LCL-1 and LCL-2 thus represent the first example of class-selective probes for phosphatases.
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