6E2F

Cryo-EM structure of human TRPV6 in complex with Calmodulin


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism of calmodulin inactivation of the calcium-selective TRP channel TRPV6.

Singh, A.K.McGoldrick, L.L.Twomey, E.C.Sobolevsky, A.I.

(2018) Sci Adv 4: eaau6088-eaau6088

  • DOI: 10.1126/sciadv.aau6088
  • Primary Citation of Related Structures:  
    6E2F, 6E2G

  • PubMed Abstract: 
  • Calcium (Ca 2+ ) plays a major role in numerous physiological processes. Ca 2+ homeostasis is tightly controlled by ion channels, the aberrant regulation of which results in various diseases including cancers. Calmodulin (CaM)-mediated Ca 2+ -induced inactivation is an ion channel regulatory mechanism that protects cells against the toxic effects of Ca 2+ overload ...

    Calcium (Ca 2+ ) plays a major role in numerous physiological processes. Ca 2+ homeostasis is tightly controlled by ion channels, the aberrant regulation of which results in various diseases including cancers. Calmodulin (CaM)-mediated Ca 2+ -induced inactivation is an ion channel regulatory mechanism that protects cells against the toxic effects of Ca 2+ overload. We used cryo-electron microscopy to capture the epithelial calcium channel TRPV6 (transient receptor potential vanilloid subfamily member 6) inactivated by CaM. The TRPV6-CaM complex exhibits 1:1 stoichiometry; one TRPV6 tetramer binds both CaM lobes, which adopt a distinct head-to-tail arrangement. The CaM carboxyl-terminal lobe plugs the channel through a unique cation-π interaction by inserting the side chain of lysine K115 into a tetra-tryptophan cage at the pore's intracellular entrance. We propose a mechanism of CaM-mediated Ca 2+ -induced inactivation that can be explored for therapeutic design.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168th Street, New York, NY 10032, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transient receptor potential cation channel subfamily V member 6A, B, C, D725Homo sapiensMutation(s): 0 
Gene Names: TRPV6ECAC2
Find proteins for Q9H1D0 (Homo sapiens)
Explore Q9H1D0 
Go to UniProtKB:  Q9H1D0
NIH Common Fund Data Resources
PHAROS:  Q9H1D0
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Calmodulin-1E149Homo sapiensMutation(s): 0 
Gene Names: CALM1CALMCAMCAM1
Find proteins for P0DP23 (Homo sapiens)
Explore P0DP23 
Go to UniProtKB:  P0DP23
NIH Common Fund Data Resources
PHAROS:  P0DP23
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States1R01CA206573-01A1

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-22
    Type: Initial release
  • Version 1.1: 2018-10-24
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence, Other