6GOM

KRAS-169 Q61H GPPNHP + PPIN-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure-based development of new RAS-effector inhibitors from a combination of active and inactive RAS-binding compounds.

Cruz-Migoni, A.Canning, P.Quevedo, C.E.Bataille, C.J.R.Bery, N.Miller, A.Russell, A.J.Phillips, S.E.V.Carr, S.B.Rabbitts, T.H.

(2019) Proc Natl Acad Sci U S A 116: 2545-2550

  • DOI: 10.1073/pnas.1811360116
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The RAS gene family is frequently mutated in human cancers, and the quest for compounds that bind to mutant RAS remains a major goal, as it also does for inhibitors of protein-protein interactions. We have refined crystallization conditions ...

    The RAS gene family is frequently mutated in human cancers, and the quest for compounds that bind to mutant RAS remains a major goal, as it also does for inhibitors of protein-protein interactions. We have refined crystallization conditions for KRAS 169 Q61H -yielding crystals suitable for soaking with compounds and exploited this to assess new RAS-binding compounds selected by screening a protein-protein interaction-focused compound library using surface plasmon resonance. Two compounds, referred to as PPIN-1 and PPIN-2, with related structures from 30 initial RAS binders showed binding to a pocket where compounds had been previously developed, including RAS effector protein-protein interaction inhibitors selected using an intracellular antibody fragment (called Abd compounds). Unlike the Abd series of RAS binders, PPIN-1 and PPIN-2 compounds were not competed by the inhibitory anti-RAS intracellular antibody fragment and did not show any RAS-effector inhibition properties. By fusing the common, anchoring part from the two new compounds with the inhibitory substituents of the Abd series, we have created a set of compounds that inhibit RAS-effector interactions with increased potency. These fused compounds add to the growing catalog of RAS protein-protein inhibitors and show that building a chemical series by crossing over two chemical series is a strategy to create RAS-binding small molecules.


    Organizational Affiliation

    Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, John Radcliffe Hospital, University of Oxford, OX3 9DS Oxford, United Kingdom; terence.rabbitts@imm.ox.ac.uk.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GTPase KRasA, B, C, D, E, F172Homo sapiensMutation(s): 1 
Gene Names: KRASKRAS2RASK2
Find proteins for P01116 (Homo sapiens)
Explore P01116 
Go to UniProtKB:  P01116
NIH Common Fund Data Resources
PHAROS  P01116
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GNP
Query on GNP

Download CCD File 
A, B, C, D, E, F
PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N
 Ligand Interaction
F6E
Query on F6E

Download CCD File 
A
(6~{S})-1-(1~{H}-imidazol-4-ylcarbonyl)-6-[(4-phenylphenyl)methyl]-4-propyl-1,4-diazepan-5-one
C25 H28 N4 O2
NXIUWTFGGYLRTA-QFIPXVFZSA-N
 Ligand Interaction
CIT
Query on CIT

Download CCD File 
A, D
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

Download CCD File 
B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
MG
Query on MG

Download CCD File 
A, B, C, D, E, F
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A,B,C,D,E,FL-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.18α = 90
b = 119.84β = 90
c = 158.6γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
xia2data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom099246/Z/12/Z
BloodwiseUnited Kingdom12051
Medical Research Council (United Kingdom)United KingdomMR/J000612/1

Revision History 

  • Version 1.0: 2019-02-06
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Data collection, Database references