7JHP

Crystal structure of HRas in complex with the Ras-binding and cysteine-rich domains of CRaf-kinase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.216 

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Literature

Crystal Structure Reveals the Full Ras-Raf Interface and Advances Mechanistic Understanding of Raf Activation.

Cookis, T., Mattos, C.

(2021) Biomolecules 11

  • DOI: https://doi.org/10.3390/biom11070996
  • Primary Citation of Related Structures:  
    7JHP

  • PubMed Abstract: 

    • Ras and Raf-kinase interact through the Ras-binding (RBD) and cysteine-rich domains (CRD) of Raf to signal through the mitogen-activated protein kinase pathway, yet the molecular mechanism leading to Raf activation has remained elusive. We present the 2.8 Å crystal structure of the HRas-CRaf-RBD_CRD complex showing the Ras-Raf interface as a continuous surface on Ras, as seen in the KRas-CRaf-RBD_CRD structure ...

    Ras and Raf-kinase interact through the Ras-binding (RBD) and cysteine-rich domains (CRD) of Raf to signal through the mitogen-activated protein kinase pathway, yet the molecular mechanism leading to Raf activation has remained elusive. We present the 2.8 Å crystal structure of the HRas-CRaf-RBD_CRD complex showing the Ras-Raf interface as a continuous surface on Ras, as seen in the KRas-CRaf-RBD_CRD structure. In molecular dynamics simulations of a Ras dimer model formed through the α4-α5 interface, the CRD is dynamic and located between the two Ras protomers, poised for direct or allosteric modulation of functionally relevant regions of Ras and Raf. We propose a molecular model in which Ras binding is involved in the release of Raf autoinhibition while the Ras-Raf complex dimerizes to promote a platform for signal amplification, with Raf-CRD centrally located to impact regulation and function.

    Related Citations: 
    • Crystal structure reveals the full Ras:Raf interface and advances mechanistic understanding of Raf activation
      Cookis, T., Mattos, C.
      (2020) Biorxiv --: --
    Organizational Affiliation: 

    Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTPase HRas166Homo sapiensMutation(s): 1 
Gene Names: HRAS, HRAS1
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P01112 (Homo sapiens)
Explore P01112 
Go to UniProtKB:  P01112
PHAROS:  P01112
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01112
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RAF proto-oncogene serine/threonine-protein kinaseB [auth C]133Homo sapiensMutation(s): 0 
Gene Names: RAF1, RAF
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for P04049 (Homo sapiens)
Explore P04049 
Go to UniProtKB:  P04049
PHAROS:  P04049
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04049
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GNP
Query on GNP
Download Ideal Coordinates CCD File 
C [auth A]PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
E [auth C],
F [auth C]		ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.216 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.487α = 90
b = 44.353β = 103.945
c = 74.395γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesMCB-1517295

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-05
    Type: Initial release
  • Version 1.1: 2021-08-25
    Changes: Database references