Difference between revisions of "Part:BBa K1689012"

Revision as of 16:30, 27 September 2015

dCas9-Nlact

N terminal of β-lactamase fused with dCas9

β-Lactamase(Amp) is produced by some bacteria, providing resistance against penicilins and so on. The β-Lactamase hydrolyzes β-lactam's conservative ring region, deactivating the antibiotic, and it can be use for the treatment of bacterial infection.
In our project, β-Lactamase is used to catalyze the hydrolysis of penicillin to penicillinoic acid. This redox reaction leads to current changes, which can be detected using A3 electrode system. We dissected β-Lactamase between Gly196 and Leu198, for they are on the opposite side of the active site. Moreover, we can enhance the activity and metabolically stability of β-Lactamase by introducing a mutation M182T, which disrupts an inactive molten-globule intermediate of β-Lactamase.



Reference: 1. do Prado, T. M., Foguel, M. V., Gonçalves, L. M., & Maria del Pilar, T. S. (2015). β-Lactamase-based biosensor for the electrochemical determination of benzylpenicillin in milk. Sensors and Actuators B: Chemical, 210, 254-258. 2. Shekhawat, S. S., & Ghosh, I. (2011). Split-protein systems: beyond binary protein–protein interactions. Current opinion in chemical biology, 15(6), 789-797.

Sequence and Features