1Q9C

Crystal Structure of the Histone domain of Son of Sevenless


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.21 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.255 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Tandem Histone Folds in the Structure of the N-terminal Segment of the Ras Activator Son of Sevenless

Sondermann, H.Soisson, S.M.Bar-Sagi, D.Kuriyan, J.

(2003) Structure 11: 1583-1593


  • PubMed Abstract: 
  • The Ras activator Son of Sevenless (Sos) contains a Cdc25 homology domain, responsible for nucleotide exchange, as well as Dbl/Pleckstrin homology (DH/PH) domains. We have determined the crystal structure of the N-terminal segment of human Sos1 (resi ...

    The Ras activator Son of Sevenless (Sos) contains a Cdc25 homology domain, responsible for nucleotide exchange, as well as Dbl/Pleckstrin homology (DH/PH) domains. We have determined the crystal structure of the N-terminal segment of human Sos1 (residues 1-191) and show that it contains two tandem histone folds. While the N-terminal domain is monomeric in solution, its structure is surprisingly similar to that of histone dimers, with both subunits of the histone "dimer" being part of the same peptide chain. One histone fold corresponds to the region of Sos that is clearly similar in sequence to histones (residues 91-191), whereas the other is formed by residues in Sos (1-90) that are unrelated in sequence to histones. Residues that form a contiguous patch on the surface of the histone domain of Sos are conserved from C. elegans to humans, suggesting a potential role for this domain in protein-protein interactions.


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley, CA 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Son of sevenless protein
A, B, C, D, E, F, G, H, I
191Homo sapiensMutation(s): 0 
Gene Names: SOS1
Find proteins for Q07889 (Homo sapiens)
Go to Gene View: SOS1
Go to UniProtKB:  Q07889
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F, G, H, I
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.21 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.255 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 93.397α = 90.00
b = 109.199β = 90.00
c = 212.399γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
RESOLVEphasing
CNSrefinement
SOLVEphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance