Catalytic antibodies with acyl-transfer capabilities: mechanistic and kinetic investigations
摘要:
Antibodies have been shown to catalyze acyl-transfer reactions. The processes by which they perform such tasks have often been postulated but largely remain unknown. An extended study is presented on three different monoclonal antibodies that catalyze the hydrolysis of an alkyl ester and an aryl amide bond. Antibodies 2H6 and 21H3 catalyze the hydrolysis of an unactivated benzyl ester and show exquisite specificity for substrates with either the R or S configuration, respectively, while 43C9 catalyzes the cleavage of a p-nitroanilide amide bond. New substrates were synthesized and buffer-assisted reactions were employed to determine antibody-substrate fidelity. Oxygen-18 incorporation experiments were performed providing evidence that these antibody-mediated reactions proceed through attack at the acyl carbonyl, and excluding the possibility of an S(N)2 displacement; mechanism for the ester hydrolysis reaction. A ph-rate profile study in protium and deuterium oxide was performed on antibody 43C9. This revealed an apparent PK(a) of approximately 9 involved in catalysis, but both the presence and absence of a solvent isotope effect in the ph-dependent and -independent regions suggested a multistep reaction pathway may be operative.
Pharmaceutical composition and method of treating cancer
申请人:King Abdulaziz University
公开号:US10844022B1
公开(公告)日:2020-11-24
Cytotoxic compounds containing a phenyl core, amide link(s), an imidazolinone or a propenamide moiety. Also described are pharmaceutical compositions incorporating the cytotoxic compounds and methods for treating cancer. These compounds are cytotoxic against breast, prostate, and leukemia cancer cell lines via dual inhibition of Src kinases and tubulin.
Cytotoxic compounds containing a phenyl core, amide link(s), an imidazolinone or a propenamide moiety. Also described are pharmaceutical compositions incorporating the cytotoxic compounds and methods for treating cancer. These compounds are cytotoxic against breast, prostate, and leukemia cancer cell lines via dual inhibition of Src kinases and tubulin.
Anticancer compounds, pharmaceutical compositions thereof, and a method of treating cancer
申请人:King Abdulaziz University
公开号:US11180458B2
公开(公告)日:2021-11-23
Cytotoxic compounds containing a phenyl core, amide link(s), an imidazolinone or a propenamide moiety. Also described are pharmaceutical compositions incorporating the cytotoxic compounds and methods for treating cancer. These compounds are cytotoxic against breast, prostate, and leukemia cancer cell lines via dual inhibition of Src kinases and tubulin.
Chemotherapeutic oxazolone derivatives and pharmaceutical compositions thereof
申请人:King Abdulaziz University
公开号:US11220485B2
公开(公告)日:2022-01-11
Cytotoxic compounds containing a phenyl core, amide link(s), an imidazolinone or a propenamide moiety. Also described are pharmaceutical compositions incorporating the cytotoxic compounds and methods for treating cancer. These compounds are cytotoxic against breast, prostate, and leukemia cancer cell lines via dual inhibition of Src kinases and tubulin.
Approach to the use of benzylpenicillin acylase for configurational correlations of amino compounds. 2. Hydrolysis of N-(p-aminophenylacetyl) derivatives of some chiral primary amines