A small step towards an important goal: fragment screen of the c-di-AMP-synthesizing enzyme CdaA
ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY(2024)
Abstract
CdaA is the most widespread diadenylate cyclase in many bacterial species, including several multidrug-resistant human pathogens. The enzymatic product of CdaA, cyclic di-AMP, is a secondary messenger that is essential for the viability of many bacteria. Its absence in humans makes CdaA a very promising and attractive target for the development of new antibiotics. Here, the structural results are presented of a crystallographic fragment screen against CdaA from Listeria monocytogenes, a saprophytic Gram-positive bacterium and an opportunistic food-borne pathogen that can cause listeriosis in humans and animals. Two of the eight fragment molecules reported here were localized in the highly conserved ATP-binding site. These fragments could serve as potential starting points for the development of antibiotics against several CdaA-dependent bacterial species.
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Key words
crystallographic fragment screening,CdaA,Listeria monocytogenes,cyclic di-AMP,drug design
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