Part:BBa_K2606001:Design
msmK
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 775
- 1000COMPATIBLE WITH RFC[1000]
Design Notes
It is a fragment cloned from Lactococcus lactis NZ9000 gene group, which is verified to be a new and effective anti-acid gene in Lactococcus lactis NZ3900.
Usage and function
The msmK overexpression strain has 213-fold higher survival rate than parent one at pH 4.0 after 3 hours.
Fig 1 Survival rate at acid stress (pH 4.0)
Fig 2 Electron microscopy of L.lactis NZ3900/pNZ8149-msmk-cspD2-gfp and L.lactis NZ3900/pNZ8149 before and after acid stress
Before the acid stress, the cell structure of the control strain and the recombinant strain remained intact. After 3 hours of pH 4.0 stress, the cell membrane thickness became thinner and the surface became rough, and the cell membrane of some control strains ruptured. In comparison, the cell structure of the recombinant strain remains more intact, thereby effectively reducing the damage caused by acid stress on the cells.
Source
msmK is derived from L.lactis NZ9000 and is a genomic DNA gene sequence.