Document Detail


Response mechanisms of lactic acid bacteria to alkaline environments: A review.
MedLine Citation:
PMID:  22168378     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Regulation of the cytoplasmic or internal pH (pHin) is a fundamental requirement for the survival and viability of bacteria. The optimum pHin for most bacteria is near the neutral point (pH 7.0). Therefore, bacteria may have some strategies to adapt themselves to the acidity or alkalinity of cytoplasm. As other microorganisms, lactic acid bacteria (LAB) are able to maintain a neutral or near neutral cytoplasmic pH even when the pH of the external medium varies. Mechanisms facilitating survival and growth under alkaline conditions of LAB are reviewed. These mechanisms are: (i) the active potassium extrusion and the potassium-proton antiport system, (ii) the sodium-proton antiport system, (iii) the proton-translocating adenosine triphosphatase (ATPase), (iv) the formation of transmembrane proton gradients (ΔpH) in a reversed direction, and (v) the adaptation, cross-protection, and changes in protein synthesis.
Authors:
Armand P Nyanga-Koumou; Labia Irene I Ouoba; Simon C Kobawila; Delphin Louembe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-14
Journal Detail:
Title:  Critical reviews in microbiology     Volume:  -     ISSN:  1549-7828     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8914274     Medline TA:  Crit Rev Microbiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Département de Biologie Cellulaire et Moléculaire, Faculté des Sciences, Université Marien N'Gouabi , Brazzaville , Congo.
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