<ul data-eligibleForWebStory="true">Study reveals the role of SLC13A5 transporter in severe epilepsy related to citrate dysfunction.Mutations in SLC13A5 gene disrupt citrate transport leading to developmental epileptic encephalopathy.Research employs deep mutational scanning to identify critical mutations affecting transporter function.Understanding SLC13A5 variants aids in rare disease mechanism elucidation for potential targeted therapies.Findings highlight importance of functional mapping for membrane proteins in neurological disorders.