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Potentiating Activity of GmhA Inhibitors on Gram-Negative Bacteria.

Authors :
Moreau F
Atamanyuk D
Blaukopf M
Barath M
Herczeg M
Xavier NM
Monbrun J
Airiau E
Henryon V
Leroy F
Floquet S
Bonnard D
Szabla R
Brown C
Junop MS
Kosma P
Gerusz V
Source :
Journal of medicinal chemistry [J Med Chem] 2024 Apr 25; Vol. 67 (8), pp. 6610-6623. Date of Electronic Publication: 2024 Apr 10.
Publication Year :
2024

Abstract

Inhibition of the biosynthesis of bacterial heptoses opens novel perspectives for antimicrobial therapies. The enzyme GmhA responsible for the first committed biosynthetic step catalyzes the conversion of sedoheptulose 7-phosphate into d- glycero -d- manno -heptose 7-phosphate and harbors a Zn <superscript>2+</superscript> ion in the active site. A series of phosphoryl- and phosphonyl-substituted derivatives featuring a hydroxamate moiety were designed and prepared from suitably protected ribose or hexose derivatives. High-resolution crystal structures of GmhA complexed to two N -formyl hydroxamate inhibitors confirmed the binding interactions to a central Zn <superscript>2+</superscript> ion coordination site. Some of these compounds were found to be nanomolar inhibitors of GmhA. While devoid of HepG2 cytotoxicity and antibacterial activity of their own, they demonstrated in vitro lipopolysaccharide heptosylation inhibition in Enterobacteriaceae as well as the potentiation of erythromycin and rifampicin in a wild-type Escherichia coli strain. These inhibitors pave the way for a novel treatment of Gram-negative infections.

Details

Language :
English
ISSN :
1520-4804
Volume :
67
Issue :
8
Database :
MEDLINE
Journal :
Journal of medicinal chemistry
Publication Type :
Academic Journal
Accession number :
38598312
Full Text :
https://doi.org/10.1021/acs.jmedchem.4c00037