Genomic, Transcriptional, and Phenotypic Analysis of the Glucose Derepressed Clostridium beijerinckii Mutant Exhibiting Acid Crash Phenotype
- Department of Food Science and Human Nutrition University of Illinois at Urbana‐Champaign Urbana IL 61801 USA, Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
- Department of Food Science and Human Nutrition University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
- Institute for Systems Biology Seattle WA USA
- Biosystems Engineering Department Auburn University Auburn AL 36849 USA
- Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA, Department of Bioengineering and Department of Physics University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
- Department of Food Science and Human Nutrition University of Illinois at Urbana‐Champaign Urbana IL 61801 USA, The Integrated Bioprocessing Research Laboratory (IBRL) University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
Clostridium beijerinckii is a predominant solventogenic bacterium that is used for the ABE fermentation. Various C. beijerinckii mutants are constructed for desirable phenotypes. The C. beijerinckii mutant BA105 harboring a glucose derepression phenotype was previously isolated and demonstrated the enhanced amylolytic activity in the presence of glucose. Despite its potential use, BA105 is not further characterized and utilized. Therefore, the authors investigate fermentation phenotypes of BA105 in this study. Under the typical batch fermentation conditions, BA105 consistently exhibits acid crash phenotype resulting in limited glucose uptake and cell growth. However, when the culture pH is maintained above 5.5, BA105 exhibits the increased glucose uptake and butanol production than did the wild‐type. To further analyze BA105, the authors perform genome sequencing and RNA sequencing. Genome analysis identifies two SNPs unique to BA105, in the upstream region of AbrB regulator (Cbei_4885) and the ROK family glucokinase (Cbei_4895) which are involved in catabolite repression and regulation of sugar metabolism. Transcriptional analysis of BA105 reveals significant differential expression of the genes associated with the PTS sugar transport system and acid production. This study improves understanding of the acid crash phenomenon and provides the genetic basis underlying the catabolite derepression phenotype of C. beijericnkii .
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1398726
- Journal Information:
- Biotechnology Journal, Journal Name: Biotechnology Journal Journal Issue: 11 Vol. 12; ISSN 1860-6768
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Similar Records
Multiplex growth rate phenotyping of synthetic mutants in selection to engineer glucose and xylose co‐utilization in Escherichia coli
Complete Genome Sequence of Solvent-Tolerant Clostridium beijerinckii Strain SA-1