Forward genetics reveals a conserved CNBHD-CNBHD interface that restrains EAG channel activation to regulate sleep.

A conserved CNBHD-CNBHD interface in KCNH channels restrains activation, with mutations like G574E in EGL-2 enhancing activity to suppress sleep in C. elegans.

• Why it matters: Understanding how KCNH channels influence neuronal excitability and behavior is crucial, as their regulation impacts sleep and neurological functions across species.
• What they did: Using an unbiased forward genetic screen in C. elegans, researchers identified mutations at a conserved glycine residue affecting channel gating and sleep regulation, supported by electrophysiological studies.
• The result: Findings reveal that disrupting the CNBHD-CNBHD interface enhances channel activity, suppresses sleep, and suggests a conserved mechanism across species, offering insights into neuronal excitability control.