Difference between revisions of "Part:BBa K2933203"

Revision as of 13:56, 23 September 2019

T7 promoter+RBS b+Linker h+His+Linker f+NDM-23+T7 terminator

This part consists of T7 promoter, RBS and protein coding sequence（His+Linker f+NDM-23），and the biological module can be built into E.coli for protein expression.

Sequence and Features

Usage and Biology

This composite part is made up with seven basic parts, the His tag, T7 promoter, RBS ，Linker h ，Linker f，T7 terminator and our target protein NDM-23. It encodes a protein which is NDM-23 fused with His tag. The fusion protein is about 28.5 kD. In order to gain the highly purified target protein, we add His tag in N-terminal of NDM-23 . It is convenient for us to purify our target protein.

Molecular cloning

First, we used the vector pGEX-28a to construct our expression plasmid. And then we converted the plasmid constructed to E. coli DH5α to expand the plasmid largely.

References

[1] Van Duin D, Doi Y. The global epidemiology of carbapenemase-producing Enterobacteriaceae [J]. Virulence, 2017,8(4): 460469.
[2] Yong D, Toleman MA, Giske cG, et al. Characterization of a new metallo-beta-lactamase gene, bla(NDM-1), and a novel erythromycin esterase gene carried on a unique geneticstructure in Klebsiella pneumoniae sequence type 14 from India [J]. Antimicrob Agents Chemother, 2009,53(12): 5046-5054.
[3] Wu w. Feng Y, Tang G et al. NDM Metallo-ß-Lactamases and Their Bacterial Producers in Health Care Sttings [J]. Clin Microbiol Rev, 2019,32(2): 0011500118.
[4] Khan AU, Maryam L, Zarilli R. Structure, Genetics and Worldwide Spread of New Delhi Maeallo-beta-lactamase (NDM): a threat to public health [J].BMC Microbiol, 2017,17(1):101-112.
[5] Zheng B, Lv T, Xu H, et al. Discovery and characterisation of an escherichia coli ST206 strain producing NDM-5 and MCR-1 from a patient with acute diarrhoea in China [J]. Int JAntimicrob Agents, 2018,51(2): 273-275.
[6] Li X, Jiang Y, Wu K,et al. Whole-genome sequencing identification of a multidrug-resistan t Salmonella enterica serovar Typhimurium strain carrying blaNDM-5 from Guangdong, China [J]. Infect Genet Evol, 2017,55: 195-198.
[7] Rahman M, Shukla SK, Prasad KN, et al. Prevalence and molecular characterisation of New Delhi metallo-β-lactamases NDM-I, NDM-5, NDM-6 and NDM-7 in multidrug- resistant Enterobacteriaceae from India [J]. Int J Antimierob Agents, 2014，44(1).
[8] Rojas LJ, Hujer AM, Rudin SD, et al. NDM-5 and OXA-181 Beta-Lactamases, a Significant Threat Continues To Spread in the Americas [J]. Antimicrob Agents Chemother,2017,61(7): pii: e00454-17.
[9] Almakki A, Maure A, Pantel A, et al. NDM-5-producing Escherichia coli in an urban river in Montpellier, France [I]. Int J Antimicrob Agents, 2017,50(1): 123-124.
[10] Rozales FP, Magagnin cM, Campos JC, et al. Characterization of Transformants Obtained From NDM-1-Producing Enterobacteriaceae in Brazil [J]. Infect Control Hosp Epidemiol,2017,38(5): 634-636.
[11] Yang B, Feng Y, McNally A, et al. Occurrence of Enterobacter hormaechei carrying blaNDM-1 and blaKPC-2 in China [J]. Diagn Microbiol Infect Dis, 2018.90(2): 139-142.
Figure 1. The PCR result of NDM-23.

After verification, it was determined that the construction is successful. We converted the plasmid to E. coli BL21(DE3) for expression and purification.