Inhibition studies of the β-carbonic anhydrases from the bacterial pathogen Salmonella enterica serovar Typhimurium with sulfonamides and sulfamates.

Abstract:

:The two β-carbonic anhydrases (CAs, EC 4.2.1.1) from the bacterial pathogen Salmonella enterica serovar Typhimurium, stCA 1 and stCA 2, were investigated for their inhibition with a large panel of sulfonamides and sulfamates. Unlike inorganic anions, which are weak, millimolar inhibitors of the two enzymes [Vullo et al., Bioorg. Med. Chem. Lett.2011, 21, 3591], sulfonamides and sulfamates are effective micro-to nanomolar inhibitors of the two enzymes. Various types of inhibitors have been detected among the 38 investigated sulfonamides/sulfamates, with K(I)s in the range of 31 nM-5.87 μM. The best stCA 1 inhibitors were acetazolamide and benzolamide-based compounds, whereas the best stCA 2 inhibitors were sulfonylated benzenesulfonamides and amino-benzolamide derivatives (K(I)s in the range of 31-90 nM). 3-Fluoro-5-chloro-4-aminobenzolamide showed an inhibition constant of 51 nM against stCA 1 and of 38 nM against stCA 2, being the best inhibitor detected so far for these enzymes. As many strains of S. enterica show extensive resistance to classical antibiotics, inhibition of the β-CAs investigated here may be useful for developing novel antibacterials, targeting β-CAs which may be involved in pathogenicity and invasion of some bacteria.

journal_name

Bioorg Med Chem

authors

Nishimori I,Minakuchi T,Vullo D,Scozzafava A,Supuran CT

doi

10.1016/j.bmc.2011.06.038

subject

Has Abstract

pub_date

2011-08-15 00:00:00

pages

5023-30

issue

16

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(11)00466-4

journal_volume

19

pub_type

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