Isolation, recombinant expression and characterization of the dprA gene product in Streptomyces rimosus NRRL 2455
Aboshanab K.;
Abstract
Dihydrodipicolinate synthase (DHDPS) catalyses the first enzymatic step in the lysine-biosynthetic
pathway in bacteria, plants and some fungi. In this study, cloning and submission of 3639 bp from
Streptomyces rimosus NRRL 2455 to the EMBL database under the accession code EU617017 were
carried out. The entire dprA gene was cloned and heterologously expressed in Escherichia coli BL21
(DE3) and the gene product was purified and analysed spectrophotometrically. A dprA- knock-out
mutant was created and showed a reduction of mycelia growth and spore formation by about 43 and
37%, respectively, as compared to the wild strain. Fed with meso-diaminopimelic acid, the dprA- mutant
regained its capability of mycelial growth, however no significant effect on spore formation was
observed confirming that dprA gene product was involved in the biosynthesis of dihydrodipicolinate in
S. rimosus NRRL 2455. This is the first report about identification of dihydrodipicolinate synthase of the
order streptomycetes.
pathway in bacteria, plants and some fungi. In this study, cloning and submission of 3639 bp from
Streptomyces rimosus NRRL 2455 to the EMBL database under the accession code EU617017 were
carried out. The entire dprA gene was cloned and heterologously expressed in Escherichia coli BL21
(DE3) and the gene product was purified and analysed spectrophotometrically. A dprA- knock-out
mutant was created and showed a reduction of mycelia growth and spore formation by about 43 and
37%, respectively, as compared to the wild strain. Fed with meso-diaminopimelic acid, the dprA- mutant
regained its capability of mycelial growth, however no significant effect on spore formation was
observed confirming that dprA gene product was involved in the biosynthesis of dihydrodipicolinate in
S. rimosus NRRL 2455. This is the first report about identification of dihydrodipicolinate synthase of the
order streptomycetes.
Other data
Title | Isolation, recombinant expression and characterization of the dprA gene product in Streptomyces rimosus NRRL 2455 | Authors | Aboshanab K. | Keywords | Dihydrodipicolinate synthase, lysine biosynthesis, Streptomyces rimosus NRRL 2455, dprA knockout mutants | Issue Date | 2010 |
Attached Files
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