3VVI

Crystal structure of the coiled-coil domain of the transient receptor potential channel from Gibberella zeae (TRPGz)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular bases of multimodal regulation of a fungal transient receptor potential (TRP) channel

Ihara, M.Hamamoto, S.Miyanoiri, Y.Takeda, M.Kainosho, M.Yabe, I.Uozumi, N.Yamashita, A.

(2013) J.Biol.Chem. 288: 15303-15317

  • DOI: 10.1074/jbc.M112.434795

  • PubMed Abstract: 
  • Multimodal activation by various stimuli is a fundamental characteristic of TRP channels. We identified a fungal TRP channel, TRPGz, exhibiting activation by hyperosmolarity, temperature increase, cytosolic Ca(2+) elevation, membrane potential, and H ...

    Multimodal activation by various stimuli is a fundamental characteristic of TRP channels. We identified a fungal TRP channel, TRPGz, exhibiting activation by hyperosmolarity, temperature increase, cytosolic Ca(2+) elevation, membrane potential, and H2O2 application, and thus it is expected to represent a prototypic multimodal TRP channel. TRPGz possesses a cytosolic C-terminal domain (CTD), primarily composed of intrinsically disordered regions with some regulatory modules, a putative coiled-coil region and a basic residue cluster. The CTD oligomerization mediated by the coiled-coil region is required for the hyperosmotic and temperature increase activations but not for the tetrameric channel formation or other activation modalities. In contrast, the basic cluster is responsible for general channel inhibition, by binding to phosphatidylinositol phosphates. The crystal structure of the presumed coiled-coil region revealed a tetrameric assembly in an offset spiral rather than a canonical coiled-coil. This structure underlies the observed moderate oligomerization affinity enabling the dynamic assembly and disassembly of the CTD during channel functions, which are compatible with the multimodal regulation mediated by each functional module.


    Organizational Affiliation

    Molecular Signaling Research Team, Structural Physiology Research Group, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Non selective cation channel homologous to TRP channel
A, B, C, D, E, F, G, H
21Gibberella zeae (strain PH-1 / ATCC MYA-4620 / FGSC 9075 / NRRL 31084)Mutation(s): 0 
Gene Names: FG04178.1
Find proteins for I1RJZ4 (Gibberella zeae (strain PH-1 / ATCC MYA-4620 / FGSC 9075 / NRRL 31084))
Go to UniProtKB:  I1RJZ4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
C, F, H
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.146 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 35.290α = 90.00
b = 35.290β = 90.00
c = 120.237γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-10
    Type: Initial release
  • Version 1.1: 2013-07-24
    Type: Database references