Applied Microbiology and Biotechnology

, Volume 89, Issue 4, pp 1119–1125

Elimination of carbon catabolite repression in Klebsiella oxytoca for efficient 2,3-butanediol production from glucose–xylose mixtures

  • Xiao-Jun Ji
  • Zhi-Kui Nie
  • He Huang
  • Lu-Jing Ren
  • Chao Peng
  • Ping-Kai Ouyang
Applied Genetics and Molecular Biotechnology

DOI: 10.1007/s00253-010-2940-5

Cite this article as:
Ji, X., Nie, Z., Huang, H. et al. Appl Microbiol Biotechnol (2011) 89: 1119. doi:10.1007/s00253-010-2940-5
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Abstract

Microbial preference for glucose implies incomplete and/or slow utilization of lignocellulose hydrolysates, which is caused by the regulatory mechanism named carbon catabolite repression (CCR). In this study, a 2,3-butanediol (2,3-BD) producing Klebsiella oxytoca strain was engineered to eliminate glucose repression of xylose utilization. The crp(in) gene, encoding the mutant cyclic adenosine monophosphate (cAMP) receptor protein CRP(in), which does not require cAMP for functioning, was characterized and overexpressed in K. oxytoca. The engineered recombinant could utilize a mixture of glucose and xylose simultaneously, without CCR. The profiles of sugar consumption and 2,3-BD production by the engineered recombinant, in glucose and xylose mixtures, were examined and showed that glucose and xylose could be consumed simultaneously to produce 2,3-BD. This study offers a metabolic engineering strategy to achieve highly efficient utilization of sugar mixtures derived from the lignocellulosic biomass for the production of bio-based chemicals using enteric bacteria.

Keywords

2,3-ButanediolKlebsiella oxytocaGlucoseXyloseCarbon catabolite repressionMutant cAMP receptor protein

Supplementary material

253_2010_2940_MOESM1_ESM.doc (1.2 mb)
Supplementary Fig. S1Alignments of cloned nucleotide sequence containing coding regions for crp(in) from Escherichia coli ET25 (GenBank accession no. HM595439) and crp from E. coli K12 (NC000913), Klebsiella pneumoniae MGH 78578 (CP000647), Klebsiella oxytoca M5al (AJ278967), and Klebsiella aerogenes KC1043 (M68973) searched from GenBank data. Nucleotides differing in E. coli ET25 are surrounded with rectangles (DOC 1,259 kb)
253_2010_2940_MOESM2_ESM.doc (1.1 mb)
Supplementary Fig. S2Alignments of amino acid sequences of CRP(in) of Escherichia coli ET25 (ADK89557.1) and CRP of E. coli K12 (AP_004432), Klebsiella pneumoniae MGH 78578 (YP 001337397), Klebsiella oxytoca M5al (CAC07215) and Klebsiella aerogenes KC1043 (AAA25058). Amino acids differing in E. coli ET25 are surrounded with rectangles (DOC 1,140 kb)

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Xiao-Jun Ji
    • 1
  • Zhi-Kui Nie
    • 1
  • He Huang
    • 1
  • Lu-Jing Ren
    • 1
  • Chao Peng
    • 1
  • Ping-Kai Ouyang
    • 1
  1. 1.State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical EngineeringNanjing University of TechnologyNanjingPeople’s Republic of China