Dynamic domain interactions encode possible CheA autophosphorylation mechanisms revealed by coarse-grained simulations.

Summary: Bacteria need to know where to swim to find food or avoid danger. To do this, they use a special protein called CheA that acts like a steering wheel. For this protein to work, two of its parts (called P1 and P4) must connect perfectly, like a key fitting into a lock. Scientists used powerful computer models to watch how these tiny parts move and bump into each other. They discovered that when a small energy packet called ATP sticks to the P4 part, it helps grab the P1 part and holds it in the exact right spot. This turns the "steering wheel" on, allowing the bacteria to move in the right direction!