J Physiol. 2006 Apr 1;572(Pt 1):165-72. Epub 2006 Feb 9.

Calcium-sensing mechanism in TRPC5 channels contributing to retardation of neurite outgrowth.External

Hui, H., McHugh, D., Hannan, M., Zeng, F., Xu, S. Z., Khan, S. U., Levenson, R., Beech, D. J., Weiss, J. L.,
["Institute of Membrane and Systems Biology, Garstang Building, University of Leeds, Leeds LS2 9JT, UK."]
The calcium- and sodium-permeable transient receptor potential channel TRPC5 has an inhibitory role in neuronal outgrowth but the mechanisms governing its activity are poorly understood. Here we propose a mechanism involving the neuronal calcium sensor-1 (NCS-1) protein. Inhibitory mutants of TRPC5 and NCS-1 enhance neurite outgrowth similarly. Mutant NCS-1 does not inhibit surface-expression of TRPC5 but generally suppresses channel activity, irrespective of whether it is evoked by carbachol, store depletion, lanthanides or elevated intracellular calcium. NCS-1 and TRPC5 are in the same protein complex in rat brain and NCS-1 directly binds to the TRPC5 C-terminus. The data suggest protein-protein interaction between NCS-1 and TRPC5, and involvement of this protein complex in retardation of neurite outgrowth.
PMID: 16469785External
Arrow2 Screening Arrow2 Validation: In vitro validation Arrow2 Validation: In vivo validation Arrow2 Characterization Arrow2 Functional consequence Arrow2 top
Screening Toggle
  Experimental screening Non-experimental screening Reference
TRP channel construct Interactor source
TRP channel Interactor Method Species Region Species Organ/tissue Sample type
TRPC5 Link NCS-1 Inference Prediction 16469785
(Link: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
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Validation: In vitro validation Toggle
  Assay with recombinant proteins Reference
TRP channel construct Interactor construct
TRP channel Interactor Method Species Region Expression system Species Region Expression system
TRPC5 Link NCS-1 Yeast two-hybrid Human 619-973 Yeast Human Full-length Yeast 16469785
TRPC5 Link NCS-1 Fusion protein-pull down assay Human 619-973 E. coli Human Full-length E. coli 16469785
(Link: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
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Validation: In vivo validation Toggle
  Assay with endogenous proteins Assay with overexpressed proteins Reference
Cell or tissue Cell or tissue TRP channel construct Interactor construct
TRP channel Interactor Method Species Region Species Region
TRPC5 Link NCS-1 Co-immunoprecipitation HEK293 Human Full-length Human Full-length 16469785
TRPC5 Link NCS-1 Co-immunoprecipitation Rat brain membrane lysates 16469785
(Link: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
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Characterization Toggle
  Binding region mapping Stoichiometry Affinity (Kd) Reference
TRP channel Interactor
TRP channel Interactor Method Species Region Species Region
TRPC5 Link NCS-1 Yeast two-hybrid Human 619-803 Human Not determined 16469785
TRPC5 Link NCS-1 Yeast two-hybrid Human 803-973 Human Not determined 16469785
TRPC5 Link NCS-1 Fusion protein-pull down assay Human 619-803 Human Not determined 16469785
TRPC5 Link NCS-1 Fusion protein-pull down assay Human 803-973 Human Not determined 16469785
(Link: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
Arrow2 Screening Arrow2 Validation: In vitro validation Arrow2 Validation: In vivo validation Arrow2 Characterization Arrow2 Functional consequence Arrow2 top
Functional consequence Toggle
TRP channel Interactor Method Post-translational modification Subcellular trafficking Activity Reference
TRPC5 Link NCS-1 Calcium measurement Activation 16469785
TRPC5 Link NCS-1 Patch clamp Activation 16469785
(Link: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
TRP / Interactor

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