1 research outputs found
Ultrasensitive Scaffold-Dependent Protease Sensors with Large Dynamic Range
The
rational construction of synthetic protein switches with predefined
input–output parameters constitutes a key goal of synthetic
biology with many potential applications ranging from metabolic engineering
to diagnostics. Yet, generally applicable strategies to construct
tailor-engineered protein switches have so far remained elusive. Here,
we use SpyTag/SpyCatcher-mediated protein ligation to engineer modularly
organized, scaffold-dependent protease sensors that exploit a combination
of affinity targeting and protease-inducible protein–protein
interactions. We use this architecture to create a suite of integrated
signal sensing and amplification circuits that can detect the activity
of α-thrombin and prostate specific antigen with a dynamic range
covering 5 orders of magnitude. We determine the key design features
critical for signal transmission between protease-based sensors, transducers,
and actuators