Abstract

Transforming a linear pentapeptidic pan-SIRT1/2/3 inhibitor harboring the catalytic mechanism-based sirtuin inhibitory warhead N(ε)-thioacetyl-lysine into its side chain-to-side chain cyclized derivatives was able to furnish highly potent SIRT1/2/3 inhibition (low nM). This finding attests to the feasibility of developing structurally simple yet highly potent catalytic mechanism-based cyclic peptidic sirtuin inhibitors.

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