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Literature DB >> 26922415

The impact of heterologous catalase expression and superoxide dismutase overexpression on enhancing the oxidative resistance in Lactobacillus casei.

Jinzhong Lin^1,2, Yexia Zou³, Kunlin Cao⁴, Chengjie Ma^5,6, Zhengjun Chen⁷.

Abstract

Two heme-dependent catalase genes were amplified from genomic DNA of Lactobacillus plantarum WCFS1 (KatE1) and Lactobacillus brevis ATCC 367 (KatE2), respectively, and a manganese-containing superoxide dismutase from Lactobacillus casei MCJΔ1 (MnSOD) were cloned into plasmid pELX1, yielding pELX1-KatE1, pELX1-KatE2 and pELX1-MnSOD, then the recombinant plasmids were transferred into L. casei MCJΔ1. The strains of L. casei MCJΔ1/pELX1-KatE1 and L. casei MCJΔ1/pELX1-KatE2 were tolerant at 2 mM H2O2. The survival rates of L. casei MCJΔ1/pELX1-KatE1 and L. casei MCJΔ1/pELX1-KatE2 were 270-fold and 300-fold higher than that of the control strain on a short-term H2O2 exposure, and in aerated condition, the survival cells counts were 146- and 190-fold higher than that of the control strain after 96 h of incubation. Furthermore, L. casei MCJΔ1/pELX1-MnSOD was the best in three recombinants which was superior in the living cell viability during storage when co-storage with Lactobacillus delbrueckii subsp. lactis LBCH-1.

Entities: Chemical Species

Keywords: Catalase; Heterologous expression; Lactobacillus casei; Oxidative resistance; Superoxide dismutase (SOD)

Mesh：

Substances：

Year: 2016 PMID： 26922415 DOI： 10.1007/s10295-016-1752-8

Source DB: PubMed Journal: J Ind Microbiol Biotechnol ISSN： 1367-5435 Impact factor: 3.346

29 in total

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3. Large-Scale Phylogenomics of the Lactobacillus casei Group Highlights Taxonomic Inconsistencies and Reveals Novel Clade-Associated Features.

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