Metagenomic cloning and characterization of Naâº/H⺠antiporter genes taken from sediments in Chaerhan Salt Lake in China.
Biotechnol Lett
; 35(4): 619-24, 2013 Apr.
Article
en En
| MEDLINE
| ID: mdl-23247569
ABSTRACT
A metagenomic library containing 8,000 clones was constructed by using genomic DNA obtained from Chaerhan Salt Lake in northwest China. Three Na(+)/H(+) antiporters, C4-NhaG, C47-NhaG and C49-NhaG that grouped to the NhaG family, were screened and cloned from this metagenome by complementing Escherichia coli strain KNabc (ΔnhaA ΔnhaB ΔchaA) in medium containing 0.2 M NaCl. The three putative Na(+)/H(+) antiporters were membrane proteins with 10, 11 and 11 transmembrane segments, respectively. They enabled E. coli KNabc to grow in medium containing 0.2-0.6 M Na(+) or 7-14 mM Li(+). Everted membrane vesicles prepared from E. coli KNabc cells carrying C49-NhaG exhibited Na(+)/H(+) and Li(+)/H(+) antiport activities.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Lagos
/
Intercambiadores de Sodio-Hidrógeno
/
Metagenoma
País/Región como asunto:
Asia
Idioma:
En
Revista:
Biotechnol Lett
Año:
2013
Tipo del documento:
Article