5OEO

Solution structure of the complex of TRPV5(655-725) with a Calmodulin E32Q/E68Q double mutant


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structural Basis of Calcium-Dependent Inactivation of the Transient Receptor Potential Vanilloid 5 Channel.

Bokhovchuk, F.M.Bate, N.Kovalevskaya, N.V.Goult, B.T.Spronk, C.A.E.M.Vuister, G.W.

(2018) Biochemistry 57: 2623-2635

  • DOI: 10.1021/acs.biochem.7b01287

  • PubMed Abstract: 
  • The transient receptor potential vanilloid channel subfamily member 5 (TRPV5) is a highly selective calcium ion channel predominately expressed in the kidney epithelium that plays an essential role in calcium reabsorption from renal infiltrate. In or ...

    The transient receptor potential vanilloid channel subfamily member 5 (TRPV5) is a highly selective calcium ion channel predominately expressed in the kidney epithelium that plays an essential role in calcium reabsorption from renal infiltrate. In order to maintain Ca 2+ homeostasis, TRPV5 possesses a tightly regulated negative feedback mechanism, where the ubiquitous Ca 2+ binding protein calmodulin (CaM) directly binds to the intracellular TRPV5 C-terminus, thus regulating TRPV5. Here we report on the characterization of the TRPV5 C-terminal CaM binding site and its interaction with CaM at an atomistic level. We have solved the de novo solution structure of the TRPV5 C-terminus in complex with a CaM mutant, creating conditions that mimic the cellular basal Ca 2+ state. We demonstrate that under these conditions the TRPV5 C-terminus is exclusively bound to the CaM C-lobe only, while it confers conformational freedom to the CaM N-lobe. We also show that at elevated calcium levels, additional interactions between the TRPV5 C-terminus and CaM N-lobe occur, resulting in formation of a tight 1:1 complex, effectively making the N-lobe the calcium sensor. Together, these data are consistent with and support the novel model for Ca 2+ /CaM-dependent inactivation of TRPV channels as proposed by Bate and co-workers [ Bate , N. , et al. ( 2018 ) Biochemistry , ( 57), DOI: 10.1021/acs.biochem.7b01286 ].


    Organizational Affiliation

    JSC Spronk , Vilnius , Lithuania.,Department of Molecular and Cell Biology, Leicester Institute of Structural and Chemical Biology , University of Leicester , Lancaster Road , Leicester LE1 9HN , United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin-1
A
150Homo sapiensMutation(s): 2 
Gene Names: CALM1 (CALM, CAM, CAM1)
Find proteins for P0DP23 (Homo sapiens)
Go to Gene View: CALM1
Go to UniProtKB:  P0DP23
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transient receptor potential cation channel subfamily V member 5
C
73Homo sapiensMutation(s): 0 
Gene Names: TRPV5 (ECAC1)
Find proteins for Q9NQA5 (Homo sapiens)
Go to Gene View: TRPV5
Go to UniProtKB:  Q9NQA5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/J007897/1
Medical Research Council (United Kingdom)United KingdomMR/L000555/1
Medical Research Council (United Kingdom)United KingdomMR/P00038X/1
NWONetherlands700.55.443
NWONetherlands700.57.101

Revision History 

  • Version 1.0: 2018-04-25
    Type: Initial release
  • Version 1.1: 2018-05-16
    Type: Data collection, Database references
  • Version 1.2: 2019-05-08
    Type: Data collection