9qu4
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Cryo-EM structure of the inward-open choline-bound state of choline/ethanolamine transporter FLVCR2
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Structural highlights
DiseaseFLVC2_HUMAN Fowler vasculopathy. The disease is caused by variants affecting the gene represented in this entry. FunctionSPA_STAA8 FLVC2_HUMAN Putative heme b importer/sensor involved in heme homeostasis in response to the metabolic state of the cell and to diet. May act as a sensor of cytosolic and/or mitochondrial heme levels to regulate mitochondrial respiration processes, ATP synthesis and thermogenesis. At low heme levels, interacts with components of electron transfer chain (ETC) complexes and ATP2A2, leading to ubiquitin-mediated degradation of ATP2A2 and inhibition of thermogenesis. Upon heme binding, dissociates from ETC complexes to allow switching from mitochondrial ATP synthesis to thermogenesis. Alternatively, in coordination with ATP2A2 may mediate calcium transport and signaling in response to heme.[1] [2] References
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This page was last modified 05:36, 27 May 2026.