NEDD4L and hypertensive disorder: In Liddle's syndrome, an ENaC incorporating variant β or γ subunits that lack the PY motif leads to deficient interaction with the WW domain of NEDD4L, resulting in excessive Na+ reabsorption and hypertension, with the characteristics of salt-sensitivity, hypokalaemia, metabolic alkalosis, and reduced renin activity and aldosterone amounts 22, 59-61.