6AXG

Structure of RasGRP4 in complex with HRas


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.302 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

A histidine pH sensor regulates activation of the Ras-specific guanine nucleotide exchange factor RasGRP1.

Vercoulen, Y.Kondo, Y.Iwig, J.S.Janssen, A.White, K.A.Amini, M.Barber, D.L.Kuriyan, J.Roose, J.P.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.29002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • RasGRPs are guanine nucleotide exchange factors that are specific for Ras or Rap, and are important regulators of cellular signaling. Aberrant expression or mutation of RasGRPs results in disease. An analysis of RasGRP1 SNP variants led to the conclu ...

    RasGRPs are guanine nucleotide exchange factors that are specific for Ras or Rap, and are important regulators of cellular signaling. Aberrant expression or mutation of RasGRPs results in disease. An analysis of RasGRP1 SNP variants led to the conclusion that the charge of His 212 in RasGRP1 alters signaling activity and plasma membrane recruitment, indicating that His 212 is a pH sensor that alters the balance between the inactive and active forms of RasGRP1. To understand the structural basis for this effect we compared the structure of autoinhibited RasGRP1, determined previously, to those of active RasGRP4:H-Ras and RasGRP2:Rap1b complexes. The transition from the autoinhibited to the active form of RasGRP1 involves the rearrangement of an inter-domain linker that displaces inhibitory inter-domain interactions. His 212 is located at the fulcrum of these conformational changes, and structural features in its vicinity are consistent with its function as a pH-dependent switch.


    Organizational Affiliation

    California Institute for Quantitative Biosciences, University of California, Berkeley, United States.,Department of Anatomy, University of California, San Francisco, San Francisco, United States.,Department of Molecular and Cell Biology and Chemistry, University of California, Berkeley, United States.,Howard Hughes Medical Institute, University of California, Berkeley, United States.,Molecular Cancer Research, Center for Molecular Medicine, UMC Utrecht, Utrecht University, Utrecht, Netherlands.,Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, United States.,Department of Chemistry, University of California, Berkeley, United States.,Divisions of Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RAS guanyl-releasing protein 4
A, C, E, G, I, K
418Homo sapiensMutation(s): 0 
Gene Names: RASGRP4
Find proteins for Q8TDF6 (Homo sapiens)
Go to Gene View: RASGRP4
Go to UniProtKB:  Q8TDF6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GTPase HRas
B, D, F, H, J, L
170Homo sapiensMutation(s): 0 
Gene Names: HRAS (HRAS1)
Find proteins for P01112 (Homo sapiens)
Go to Gene View: HRAS
Go to UniProtKB:  P01112
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.302 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.227 
  • Space Group: P 32 1 2
Unit Cell:
Length (Å)Angle (°)
a = 114.105α = 90.00
b = 114.105β = 90.00
c = 680.872γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
Aimlessdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release