Journal
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
Volume 34, Issue 1, Pages 189-195Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14756366.2018.1539716
Keywords
Carbonic anydrases; Helicobacter pylori; outer membrane vesicles (OMVs); biofilm; protonography; mass spectrometry
Funding
- Ministero Italiano dell'Universita e della Ricerca (MIUR) FAR 2017 Grant
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The genome of Helicobacter pylori encodes for carbonic anhydrases (CAs, EC 4.2.1.1) belonging to the alpha- and beta-CA classes, which together with urease, have a pivotal role in the acid acclimation of the microorganism within the human stomach. Recently, in the exoproteome of H. pylori, a CA with no indication of the corresponding class was identified. Here, using the protonography and the mass spectrometry, a CA belonging to the alpha-class was detected in the outer membrane vesicles (OMVs) generated by planktonic and biofilm phenotypes of four H. pylori strains. The amount of this metalloenzyme was higher in the planktonic OMVs (pOMVs) than in the biofilm OMVs (bOMVs). Furthermore, the content of alpha-CA increases over time in the pOMVs. The identification of the alpha-CA in pOMVs and bOMVs might shed new light on the role of this enzyme in the colonization, survival, persistence, and pathogenesis of H. pylori.
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