Isolation and Characterization of Clostridium butyricum DSM 5431 Mutants with Increased Resistance to 1,3-Propanediol and Altered Production of Acids - Université Paris-Est-Créteil-Val-de-Marne Access content directly
Journal Articles Applied and Environmental Microbiology Year : 1995

Isolation and Characterization of Clostridium butyricum DSM 5431 Mutants with Increased Resistance to 1,3-Propanediol and Altered Production of Acids

C Manginot-Durr
  • Function : Author
J Amine
  • Function : Author
E Petitdemange
  • Function : Author
H Petitdemange
  • Function : Author

Abstract

Clostridium butyricum mutants were isolated from the parent strain DSM 5431 after mutagenesis with N-methyl-N(prm1)-nitro-N-nitrosoguanidine and two selection procedures: osmotic pressure and the proton suicide method. Isolated mutants were more resistant to glycerol and to 1,3-propanediol (1,3-PD) than was the wild type, and they produced more biomass. In batch culture on 62 g of glycerol per liter, the wild type produced more acetic acid than butyrate, with an acetate/butyrate ratio of 5.0, whereas the mutants produced almost the same quantities of both acids or more butyrate than acetate with acetate/butyrate ratios from 0.6 to 1.1. The total acid formation was higher in the wild-type strain. Results of analysis of key metabolic enzymatic activities were in accordance with the pattern of fermentation product formation: either the butyrate kinase activity increased or the acetate kinase activity decreased in cell extracts of the mutants. A decreased level of the hydrogenase and NADH-ferredoxin activities concomitant with an increase in ferredoxin-NAD(sup+) reductase activities supports the conclusion that the maximum percentage of NADH available and used for the formation of 1,3-PD was higher for the mutants (97 to 100%) than for the wild type (70%). In fed-batch culture, at the end of the fermentation (72 h for the wild-type strain and 80 to 85 h for the mutants), 44% more glycerol was consumed and 50% more 1,3-PD was produced by the mutants than by the wild-type strain.

Dates and versions

hal-04473316 , version 1 (22-02-2024)

Identifiers

Cite

S Abbad-Andaloussi, C Manginot-Durr, J Amine, E Petitdemange, H Petitdemange. Isolation and Characterization of Clostridium butyricum DSM 5431 Mutants with Increased Resistance to 1,3-Propanediol and Altered Production of Acids. Applied and Environmental Microbiology, 1995, 61 (12), pp.4413-4417. ⟨10.1128/aem.61.12.4413-4417.1995⟩. ⟨hal-04473316⟩
2 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More