Programming biological communication between distinct membraneless compartments.

Distinct membraneless organelles within cells collaborate closely to organize crucial functions. However, biosynthetic communicating membraneless organelles have yet to be created. Here we report a binary population of membraneless compartments capable of coexistence, biological communication and controllable feedback under cellular environmental conditions. The compartment consortia emerge from two orthogonally phase-separating proteins in a cell-free expression system. Their appearance can be programmed in time and order for on-demand delivery of molecules. In particular, the consortia can sense, process and deliver functional protein cargo in response to a protease message or a DNA message that encodes the protease. Such DNA-based molecular programs can be further harnessed by installing a feedback loop that controls the information flow at the messenger RNA level. These results contribute to understanding crosstalk among membraneless organelles and provide a design principle that can guide construction of functional compartment consortia.