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DNA topoisomerase 2 (Top2) poisons, including common anticancer drugs etoposide and doxorubicin kill cancer cells by stabilizing covalent Top2-tyrosyl-DNA 5′-phosphodiester adducts and DNA double-strand breaks (DSBs). Proteolytic degradation of the covalently attached Top2 leaves a 5′-tyrosylated blocked termini which is removed by tyrosyl DNA phosphodiesterase 2 (TDP2), prior to DSB repair through...
The partial success of RV144 human clinical trial demonstrated that ALVAC prime/envelope protein boost vaccine regimen may represent a promising strategy for the development of an effective HIV-1 vaccine. Our earlier study demonstrated that a trimeric HIV-1 envelope gp145 from an Indian clade C isolate elicited cross clade neutralizing antibodies primarily towards Tier 1 isolates. In the present study,...
Tyrosyl DNA phosphodiesterase 2 (TDP2), a newly discovered enzyme that cleaves 5′-phosphotyrosyl bonds, is a potential target for chemotherapy. TDP2 possesses both 3′- and 5′-tyrosyl-DNA phosphodiesterase activity, which is generally measured in a gel-based assay using 3′- and 5′-phosphotyrosyl linkage at the 3′ and 5′ ends of an oligonucleotide. To understand the enzymatic mechanism of this novel...
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