6V9N

Expanding the Chemical Landscape of SOS1 Activators Using Fragment Based Methods

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.165 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history. 


Literature

Discovery of Sulfonamide-Derived Agonists of SOS1-Mediated Nucleotide Exchange on RAS Using Fragment-Based Methods.

Sarkar, D., Olejniczak, E.T., Phan, J., Coker, J.A., Sai, J., Arnold, A., Beesetty, Y., Waterson, A.G., Fesik, S.W.

(2020) J Med Chem 63: 8325-8337

  • DOI: 10.1021/acs.jmedchem.0c00511
  • Primary Citation of Related Structures:  
    6V94, 6V9J, 6V9L, 6V9N, 6V9M, 6V9F

  • PubMed Abstract: 

    • The nucleotide exchange factor Son of Sevenless (SOS) catalyzes the activation of RAS by converting it from its inactive GDP-bound state to its active GTP-bound state. Recently, we have reported the discovery of small-molecule allosteric activators of SOS1 that can increase the amount of RAS-GTP in cells ...

    The nucleotide exchange factor Son of Sevenless (SOS) catalyzes the activation of RAS by converting it from its inactive GDP-bound state to its active GTP-bound state. Recently, we have reported the discovery of small-molecule allosteric activators of SOS1 that can increase the amount of RAS-GTP in cells. The compounds can inhibit ERK phosphorylation at higher concentrations by engaging a feedback mechanism. To further study this process, we sought different chemical matter from an NMR-based fragment screen using selective methyl labeling. To aid this process, several Ile methyl groups located in different binding sites of the protein were assigned and used to categorize the NMR hits into different classes. Hit to lead optimization using an iterative structure-based design paradigm resulted in compounds with improvements in binding affinity. These improved molecules of a different chemical class increase SOS1 cat -mediated nucleotide exchange on RAS and display cellular action consistent with our prior results.

    Organizational Affiliation: 

    Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37232-0146, United States.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTPase HRasA167Homo sapiensMutation(s): 0 
Gene Names: HRAS, HRAS1
EC: 3.6.5.2
Find proteins for P01112 (Homo sapiens)
Explore P01112 
Go to UniProtKB:  P01112
NIH Common Fund Data Resources
PHAROS:  P01112
GTEx:  ENSG00000174775
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Son of sevenless homolog 1B482Homo sapiensMutation(s): 0 
Gene Names: SOS1
Find proteins for Q07889 (Homo sapiens)
Explore Q07889 
Go to UniProtKB:  Q07889
NIH Common Fund Data Resources
PHAROS:  Q07889
GTEx:  ENSG00000115904
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
GTPase HRasC167Homo sapiensMutation(s): 0 
Gene Names: HRAS, HRAS1
EC: 3.6.5.2
Find proteins for P01112 (Homo sapiens)
Explore P01112 
Go to UniProtKB:  P01112
NIH Common Fund Data Resources
PHAROS:  P01112
GTEx:  ENSG00000174775
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GNP
Query on GNP
Download Ideal Coordinates CCD File 
 D [auth A]PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N		 Ligand Interaction
QTD
Query on QTD
Download Ideal Coordinates CCD File 
 G [auth B]4-phenoxybenzene-1-sulfonamide
C12 H11 N O3 S
JVMQLNXAPHLKDV-UHFFFAOYSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
 L [auth B], M [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
FMT
Query on FMT
Download Ideal Coordinates CCD File 
 F [auth A], H [auth B], I [auth B], J [auth B], K [auth B], N [auth C]FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 E [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
 O [auth C]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO		AL-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.165 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 183.862α = 90
b = 183.862β = 90
c = 178.639γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-12-13 
  • Released Date: 2020-08-26 
    • Deposition Author(s): Phan, J., Fesik, S.W.
Funding OrganizationLocationGrant Number
Lustgarten FoundationUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-26
    Type: Initial release