UNNATURAL AMINO ACIDS CAPABLE OF COVALENTLY MODIFYING PROTEIN PHOSPHATASES AND THEIR USE AS GENERAL AND SPECIFIC INHIBITORS AND PROBES
申请人:Shen Kui
公开号:US20100061936A1
公开(公告)日:2010-03-11
An unnatural amino acid including a phosphate mimicking group for mimicking a phosphate group in phosphoamino acids and a protein phosphatase modifying group for covalently binding protein phosphatases. A probe for detecting disease including a phosphate mimicking group for mimicking a phosphate group in phosphoamino acids and a protein phosphatase modifying group for covalently binding protein phosphatases. A method for detecting the presence of disease by administering the unnatural amino acid, binding the unnatural amino acid with a phosphatase, detecting a signal, and detecting the presence of disease. A method of identifying a known protein phosphatase, and a method of identifying an unknown protein phosphatase. A method of making the unnatural amino acid.
Facile Incorporation of a Phosphatase Activity-Dependent Quinone Methide Generating Motif into Phosphotyrosine
作者:Kui Shen、Lixin Qi、Mohini Ravula
DOI:10.1055/s-0029-1217025
日期:2009.11
A novel phosphotyrosine analogue that incorporates a phosphatase activity-dependent quinone methide generating motif is synthesized from tyrosine. Following orthoformylation of the phenol moiety of methyl N-Cbz-tyrosinate, the Fmoc-protected 3-difluoromethyl analogue of phosphotyrosine is obtained by functional group transformations.
Unnatural amino acids capable of covalently modifying protein phosphatases and their use as general and specific inhibitors and probes
申请人:Shen Kui
公开号:US08445706B2
公开(公告)日:2013-05-21
An unnatural amino acid including a phosphate mimicking group for mimicking a phosphate group in phosphoamino acids and a protein phosphatase modifying group for covalently binding protein phosphatases. A probe for detecting disease including a phosphate mimicking group for mimicking a phosphate group in phosphoamino acids and a protein phosphatase modifying group for covalently binding protein phosphatases. A method for detecting the presence of disease by administering the unnatural amino acid, binding the unnatural amino acid with a phosphatase, detecting a signal, and detecting the presence of disease. A method of identifying a known protein phosphatase, and a method of identifying an unknown protein phosphatase. A method of making the unnatural amino acid.
An unnaturalaminoacid was synthesized to incorporate a quinone methide-generating activity-based probe for protein tyrosine phosphatases (PTPs) and then integrated into a PTP1B-specific substrate. The resulting probe led to preferential labeling of PTP1B in cell lysates in the presence of PTP4A3.