Na+ homeostasis in Acinetobacter baumannii is facilitated via the activity of the Mrp antiporter.
Environ Microbiol
; 24(9): 4411-4424, 2022 09.
Article
em En
| MEDLINE
| ID: mdl-35535800
ABSTRACT
The human opportunistic pathogen Acinetobacter baumannii is a global threat to healthcare institutions worldwide, since it developed very efficient strategies to evade host defence and to adapt to the different environmental conditions of the host. This work focused on the importance of Na+ homeostasis in A. baumannii with regards to pathobiological aspects. In silico studies revealed a homologue of a multicomponent Na+ /H+ antiporter system. Inactivation of the Mrp antiporter through deletion of the first gene (mrpA') resulted in a mutant that was sensitive to increasing pH values. Furthermore, the strain was highly sensitive to increasing Na+ and Li+ concentrations. Increasing Na+ sensitivity is thought to be responsible for growth impairment in human fluids. Furthermore, deletion of mrpA' is associated with energetic defects, inhibition of motility and survival under anoxic and dry conditions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Antiporters
/
Acinetobacter baumannii
Limite:
Humans
Idioma:
En
Revista:
Environ Microbiol
Ano de publicação:
2022
Tipo de documento:
Article