Team:Brasil-SP/Project/DiagnosisModule

      One crucial step for our biodetector to work is its ability to discriminate between normal and abnormal Cys C, not just responding to the presence or absence of the same. The interaction of the proteins LasR and QteE is responsible for giving our circuit this feature. The QteE destabilize the LasR protein, removing its activity as an inducer, or in other words creating an expression barrier (SIEHNEL et al, 2010). In our system, the QteE will be under control of the lactose promoter (IPTG inducible), while the LasR production will be under control of the ComE responsive promoter. The Expression of LasR induced by ComE is direct consequence of the Cystatin C levels as explained in the Detection Module section. Having said that, we have to adjust the IPTG concentration so that only the LasR concentration originated from increased Cys C levels can generate in a positive diagnosis (probable kidney disfunction). Once we have figured that out our bacteria will be capable of giving different outputs for normal and increased Cys C levels.