Abstract:
:The Gram-positive Corynebacterium glutamicum is auxotrophic for biotin. Besides the biotin uptake system BioYMN and the transcriptional regulator BioQ, this bacterium possesses functional enzymes for the last three reactions of biotin synthesis starting from pimeloyl-CoA. Heterologous expression of bioF from the Gram-negative Escherichia coli enabled biotin synthesis from pimelic acid added to the medium, but expression of bioF together with bioC and bioH from E. coli did not entail biotin prototrophy. Heterologous expression of bioWAFDBI from Bacillus subtilis encoding another biotin synthesis pathway in C. glutamicum allowed for growth in biotin-depleted media. Stable growth of the recombinant was observed without biotin addition for eight transfers to biotin-depleted medium while the empty vector control stopped growth after the first transfer. Expression of bioWAFDBI from B. subtilis in C. glutamicum strains overproducing the amino acids l-lysine and l-arginine, the diamine putrescine, and the carotenoid lycopene, respectively, enabled formation of these products under biotin-depleted conditions. Thus, biotin-prototrophic growth and production by recombinant C. glutamicum were achieved.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Peters-Wendisch P,Götker S,Heider SA,Komati Reddy G,Nguyen AQ,Stansen KC,Wendisch VFdoi
10.1016/j.jbiotec.2014.01.023subject
Has Abstractpub_date
2014-12-20 00:00:00pages
346-54eissn
0168-1656issn
1873-4863pii
S0168-1656(14)00040-6journal_volume
192 Pt Bpub_type
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