These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Effect of 6-phosphofructokinase gene-pfk overexpression on nisin production in Lactococcus lactis N8].
    Author: Zhu D, Zhao K, Xu H, Bai Y, Zhang X, Qiao M.
    Journal: Wei Sheng Wu Xue Bao; 2015 Apr 04; 55(4):440-7. PubMed ID: 26211318.
    Abstract:
    OBJECTIVE: To accelerate the formation of nisin through overexpressing 6-phosphofructokinase gene pfk in nisin-producer Lactococcus lactis N8. METHODS: The genes of pfk and pkaC encoding the catalytic subunit of cAMP-dependent protein kinase were cloned into the vector pMG36e andtransformed into L. lactis N8, resulting in the recombinant strain L. lactis N8-pMG36e-pfk-pkaC. Several biochemical and physological factors, including growth profiles, activity of 6-phosphofructokinase, expression of nisA , antibacterial activity of supernatants and nisin titer, were monitored to investigate the differences between the recombinant strain and the parental strain. RESULTS: No significant difference was observed with respect to the growth patterns of the recombinant strain and the wild type. As expected, the biological activity of PFK in recombinant strain was increased for all examined samples. Correspondingly, the yield of nisin was increased by 20% in the recombinant strain after fermentation for 10 hours, which could be attributed to the accelerated biosynthesis of nisin. As a result, the fermentation cycle was reduced about 2 hours. Meanwhile, different concentration of glucose did not affect the formation of nisin. CONCLUSION: The overexpression of pfk and pkaC genes in the nisin-producer strain can effectively accelerate nisin biosynthesis.
    [Abstract] [Full Text] [Related] [New Search]