1RRB

THE RAS-BINDING DOMAIN OF RAF-1 FROM RAT, NMR, 1 STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 
  • Selection Criteria: CLOSEST TO THE AVERAGE OF 20 LEAST ENERGY STRUCTURES 

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This is version 1.2 of the entry. See complete history


Literature

Nuclear magnetic resonance and molecular dynamics studies on the interactions of the Ras-binding domain of Raf-1 with wild-type and mutant Ras proteins.

Terada, T.Ito, Y.Shirouzu, M.Tateno, M.Hashimoto, K.Kigawa, T.Ebisuzaki, T.Takio, K.Shibata, T.Yokoyama, S.Smith, B.O.Laue, E.D.Cooper, J.A.

(1999) J Mol Biol 286: 219-232

  • DOI: 10.1006/jmbi.1998.2472
  • Primary Citation of Related Structures:  
    1RRB

  • PubMed Abstract: 
  • The Ras protein and its homolog, Rap1A, have an identical "effector region" (residues 32-40) preceded by Asp30-Glu31 and Glu30-Lys31, respectively. In the complex of the "Ras-like" E30D/K31E mutant Rap1A with the Ras-binding domain (RBD), residues 51-131 of Raf-1, Glu31 in Rap1A forms a tight salt bridge with Lys84 in Raf-1 ...

    The Ras protein and its homolog, Rap1A, have an identical "effector region" (residues 32-40) preceded by Asp30-Glu31 and Glu30-Lys31, respectively. In the complex of the "Ras-like" E30D/K31E mutant Rap1A with the Ras-binding domain (RBD), residues 51-131 of Raf-1, Glu31 in Rap1A forms a tight salt bridge with Lys84 in Raf-1. However, we have recently found that Raf-1 RBD binding of Ras is indeed reduced by the E31K mutation, but is not affected by the E31A mutation. Here, the "Rap1A-like" D30E/E31K mutant of Ras was prepared and shown to bind the Raf-1 RBD less strongly than wild-type Ras, but slightly more tightly than the E31K mutant. The backbone 1H, 13C, and 15N magnetic resonances of the Raf-1 RBD were assigned in complexes with the wild-type and D30E/E31K mutant Ras proteins in the guanosine 5'-O-(beta,gamma-imidotriphosphate)-bound form. The Lys84 residue in the Raf-1 RBD exhibited a large change in chemical shift upon binding wild-type Ras, suggesting that Lys84 interacts with wild-type Ras. The D30E/E31K mutant of Ras caused nearly the same perturbations in Raf-1 chemical shifts, including that of Lys84. We hypothesized that Glu31 in Ras may not be the major salt bridge partner of Lys84 in Raf-1. A molecular dynamics simulation of a model structure of the Raf-1 RBD.Ras.GTP complex suggested that Lys84 in Raf-1 might instead form a tight salt bridge with Asp33 in Ras. Consistent with this, the D33A mutation in Ras greatly reduced its Raf-I RBD binding activity. We conclude that the major salt bridge partner of Lys84 in Raf-1 may be Asp33 in Ras.


    Organizational Affiliation

    Cellular Signaling Laboratory, The Institute of Physical and Chemical Research, 2-1 Hirosawa Wako-shi. Saitama 351-0198, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RAF PROTO-ONCOGENE SERINE/THREONINE-PROTEIN KINASEA107Rattus norvegicusMutation(s): 0 
Gene Names: Raf1Raf
EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt)
UniProt
Find proteins for P11345 (Rattus norvegicus)
Explore P11345 
Go to UniProtKB:  P11345
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 
  • Selection Criteria: CLOSEST TO THE AVERAGE OF 20 LEAST ENERGY STRUCTURES 
  • OLDERADO: 1RRB Olderado

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance