6BWF

4.1 angstrom Mg2+-unbound structure of mouse TRPM7


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the mammalian TRPM7, a magnesium channel required during embryonic development.

Duan, J.Li, Z.Li, J.Hulse, R.E.Santa-Cruz, A.Valinsky, W.C.Abiria, S.A.Krapivinsky, G.Zhang, J.Clapham, D.E.

(2018) Proc. Natl. Acad. Sci. U.S.A. 115: E8201-E8210

  • DOI: 10.1073/pnas.1810719115
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The transient receptor potential ion channel subfamily M, member 7 (TRPM7), is a ubiquitously expressed protein that is required for mouse embryonic development. TRPM7 contains both an ion channel and an α-kinase. The channel domain comprises a nonse ...

    The transient receptor potential ion channel subfamily M, member 7 (TRPM7), is a ubiquitously expressed protein that is required for mouse embryonic development. TRPM7 contains both an ion channel and an α-kinase. The channel domain comprises a nonselective cation channel with notable permeability to Mg 2+ and Zn 2+ Here, we report the closed state structures of the mouse TRPM7 channel domain in three different ionic conditions to overall resolutions of 3.3, 3.7, and 4.1 Å. The structures reveal key residues for an ion binding site in the selectivity filter, with proposed partially hydrated Mg 2+ ions occupying the center of the conduction pore. In high [Mg 2+ ], a prominent external disulfide bond is found in the pore helix, which is essential for ion channel function. Our results provide a structural framework for understanding the TRPM1/3/6/7 subfamily and extend the knowledge base upon which to study the diversity and evolution of TRP channels.


    Organizational Affiliation

    School of Basic Medical Sciences, Nanchang University, Nanchang, 330031 Jiangxi, China.,Department of Neurobiology, Harvard Medical School, Boston, MA 02115.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115.,Department of Cardiology, Boston Children's Hospital, Boston, MA 02115.,Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115.,Janelia Farm Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536.,Department of Cardiology, Boston Children's Hospital, Boston, MA 02115; zhangxiaokong@hotmail.com claphamd@hhmi.org.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRPM7
A, B, C, D
954Mus musculusMutation(s): 0 
Gene Names: Trpm7 (Chak, Ltrpc7)
EC: 2.7.11.1
Find proteins for Q923J1 (Mus musculus)
Go to UniProtKB:  Q923J1
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
A, B, C, D
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-08-15
    Type: Initial release
  • Version 1.1: 2018-08-29
    Type: Data collection, Database references
  • Version 1.2: 2018-09-05
    Type: Data collection, Database references
  • Version 1.3: 2019-12-18
    Type: Other