'Integron'-bearing vectors: a method suitable for stable chromosomal integration in highly restrictive corynebacteria.
Gene
; 107(1): 61-8, 1991 Oct 30.
Article
em En
| MEDLINE
| ID: mdl-1660430
ABSTRACT
A pBR322-derived plasmid (pCGL107) that carries the Corynebacterium melassecola ATCC17965 analogue of Escherichia coli gdhA gene (encoding glutamate dehydrogenase), was introduced into the related strain, Brevibacterium lactofermentum CGL2002, by electroporation and integrated into its chromosome by homologous recombination. However, pCGL107 cannot integrate into C. melassecola, since the host restriction prevents successful electroporation by E. coli-modified DNA. Nevertheless, B. lactofermentum-modified replicative plasmid DNA can be transformed by electroporation into C. melassecola; thus pCGL519-2, a shuttle plasmid that carries the C. melassecola analogue of E. coli gltA (encoding citrate synthase), was extracted from the former host and electroporated into the latter. Rare restriction sites conveniently placed in pCGL519-2 were used to recover a replicon-less cartridge called 'integron', that contains a selectable marker and gtlA within a single fragment. Integron prepared from pCGL519-2 DNA which had been extracted from C. melassecola, and thus, was capable of eluding the C. melassecola restriction barrier(s), was successfully electroporated into this host. The molecular analysis of the resulting transformants suggests that they result from the integration of a single circular integron molecule by homologous recombination between the gltA regions of the host genome and the integron. These transformants were stable for 30 generations in the absence of selection.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Elementos de DNA Transponíveis
/
Clonagem Molecular
/
Corynebacterium
/
Vetores Genéticos
Idioma:
En
Revista:
Gene
Ano de publicação:
1991
Tipo de documento:
Article
País de afiliação:
França