TRPC3 / cerebellar ataxia / MEMBRANE PROTEIN / moonwalker
機能・相同性
機能・相同性情報
Role of second messengers in netrin-1 signaling / positive regulation of cardiac muscle hypertrophy in response to stress / store-operated calcium channel activity / Effects of PIP2 hydrolysis / Elevation of cytosolic Ca2+ levels / inositol 1,4,5 trisphosphate binding / cation channel complex / calcium-activated cation channel activity / TRP channels / response to ATP ...Role of second messengers in netrin-1 signaling / positive regulation of cardiac muscle hypertrophy in response to stress / store-operated calcium channel activity / Effects of PIP2 hydrolysis / Elevation of cytosolic Ca2+ levels / inositol 1,4,5 trisphosphate binding / cation channel complex / calcium-activated cation channel activity / TRP channels / response to ATP / positive regulation of calcium ion transport into cytosol / phototransduction / single fertilization / regulation of cytosolic calcium ion concentration / MECP2 regulates neuronal receptors and channels / response to calcium ion / calcium ion transmembrane transport / calcium channel activity / calcium ion transport / metal ion binding / plasma membrane 類似検索 - 分子機能
Transient receptor potential channel, canonical 3 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / Ankyrin repeats (3 copies) / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily ...Transient receptor potential channel, canonical 3 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / Ankyrin repeats (3 copies) / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein 類似検索 - ドメイン・相同性
Short transient receptor potential channel 3 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM149218
米国
引用
ジャーナル: Sci Adv / 年: 2026 タイトル: Functional and structural basis of a hypermorphic TRPC3 variant. 著者: Briar Bell / Angela M Jaramillo-Granada / Luis O Romero / Irene A Gutierrez / Venkata K P S Mallampalli / Guizhen Fan / Sameer Varma / Matthew L Baker / Irina I Serysheva / Valeria Vásquez / ...著者: Briar Bell / Angela M Jaramillo-Granada / Luis O Romero / Irene A Gutierrez / Venkata K P S Mallampalli / Guizhen Fan / Sameer Varma / Matthew L Baker / Irina I Serysheva / Valeria Vásquez / Julio F Cordero-Morales / 要旨: Cerebellar ataxias are characterized by impaired motor coordination resulting from neuronal dysfunction within the cerebellum. The mechanisms underlying this pathology and its cerebellar-specific ...Cerebellar ataxias are characterized by impaired motor coordination resulting from neuronal dysfunction within the cerebellum. The mechanisms underlying this pathology and its cerebellar-specific neurodegeneration remain unknown. We uncover how a gain-of-function canonical transient receptor potential member 3 (TRPC3) mutation, coupled with a cerebellum-specific isoform, stabilizes the channel's open state, resists the leading inhibitor Pyr3, and drives calcium-dependent cell death. Restoring calcium homeostasis by expressing a Purkinje cell calcium pump improves cell viability. Transgenic expression of the TRPC3 hypermorphic variant in induces neurodegeneration, confirming its pathogenicity across species. Cryo-electron microscopy and molecular simulations reveal the structural basis for the stabilization of the cerebellar-specific TRPC3 variant in its open state and uncover a druggable allosteric inhibitory binding site. These findings provide an explanation for the vulnerability of cerebellar neurons in TRPC3-associated ataxias and highlight a site for therapeutic intervention.