Journal
PLASMID
Volume 60, Issue 1, Pages 45-52Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.plasmid.2008.04.001
Keywords
Geobacillus; shuttle vector; metabolic engineering; pyruvate decarboxylase; bioethanol
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Funding
- Biotechnology and Biological Sciences Research Council [BB/E002994/1] Funding Source: Medline
- Biotechnology and Biological Sciences Research Council [BB/E002994/1] Funding Source: researchfish
- BBSRC [BB/E002994/1] Funding Source: UKRI
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An improved, versatile shuttle vector has been created for the metabolic engineering of Geobacillus spp. As kanamycin is the most thermo-tolerant of commonly used antibiotics, the gene encoding a thermostable kanamycin nucleotidyltransferase, together with the origin of replication from the G. stearothermophilus plasmid pBST1 were cloned into the Escherichia coli cloning vector pUC18. The resulting vector, named pUCG18, replicated in both organisms and could be transformed with an efficiency of 1 x 10(4) transformants per mu g of DNA in G. thermoglucosidasius and was stable up to 68 degrees C with antibiotic selection. It was used to demonstrate expression of the pyruvate decarboxylase (pdc) gene from Zymomonas palmae in G. thermoglucosidasius at 45 degrees C. Sequence analysis of the pBST1 derived origin of replication revealed homology with a family of theta replicons that have previously only been found in strains of Bacillus megaterium. (C) 2008 Elsevier Inc. All rights reserved.
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