Journal
PROTEIN EXPRESSION AND PURIFICATION
Volume 177, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pep.2020.105765
Keywords
SaeRS two-component system; SaeR; L-arginine; Staphylococcus aureus
Categories
Funding
- National Natural Science Foundation of China [21272031]
- Fundamental Research Funds for the Central Universities [wd01190]
Ask authors/readers for more resources
The SaeRS two-component system in Staphylococcus aureus regulates the expression of virulence factors, and adding L-arginine to purification buffers can improve the stability and solubility of recombinant protein SaeR. The thermal denaturation temperature of SaeR is significantly increased in 10 mM L-Arg buffer, and MST analysis shows that SaeR can bind to the P1 promoter under different phosphorylation statuses in buffers containing L-Arg. These findings suggest an effective method for purifying SaeR and other proteins.
The SaeRS two-component system in Staphylococcus aureus controls the expression of a series of virulence factors, such as hemolysins, pmteases, and coagulase. The response regulator, SaeR, belongs to the OmpR family with an N-terminal regulatory domain and a C-terminal DNA binding domain. To improve the production and stability of the recombinant protein SaeR, L-arginine (L-Arg) was added to the purification buffers. L-Arg enhanced the solubility and stability of the recombinant protein SaeR. The thermal denaturation temperature of SaeR in 10 mM L-Arg buffer was significantly increased compared to the buffer without L-Arg. Microscale Thermophoresis (MST) analysis results showed that the SaeR protein could bind to the P1 promoter under both phosphorylated and non-phosphorylated status in buffer containing 10 mM L-Arg. These results illustrate an effective method to purify SaeR and other proteins.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available