Ionic interactions are essential for TRPV1 C-terminus binding to calmodulin.
Biochemical and Biophysical Research Communications(2008)
摘要
Calmodulin (CaM) is known to play an important role in the regulation of TRP channels activity. Although it has been reported that CaM binds to the C-terminus of TRPV1 (TRPV1-CT), no classic CaM-binding motif was found in this region. In this work, we explored this unusual TRPV1 CaM-binding motif in detail and found that five residues from a putative CaM-binding motif are important for TRPV1-CT’s binding to CaM, with arginine R785 being the most essential residue. The homology modelling suggests that a CaM-binding motif of TRPV1-CT forms an alpha helix that docks into the central cavity of CaM.
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关键词
Vanilloid receptor,TRPV1,Calmodulin,Fluorescence anisotropy
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