4D9U

Rsk2 C-terminal Kinase Domain, (E)-tert-butyl 3-(4-amino-7-(3-hydroxypropyl)-5-p-tolyl-7H-pyrrolo[2,3-d]pyrimidin-6-yl)-2-cyanoacrylate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Reversible targeting of noncatalytic cysteines with chemically tuned electrophiles.

Serafimova, I.M.Pufall, M.A.Krishnan, S.Duda, K.Cohen, M.S.Maglathlin, R.L.McFarland, J.M.Miller, R.M.Frodin, M.Taunton, J.

(2012) Nat.Chem.Biol. 8: 471-476

  • DOI: 10.1038/nchembio.925
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Targeting noncatalytic cysteine residues with irreversible acrylamide-based inhibitors is a powerful approach for enhancing pharmacological potency and selectivity. Nevertheless, concerns about off-target modification motivate the development of reve ...

    Targeting noncatalytic cysteine residues with irreversible acrylamide-based inhibitors is a powerful approach for enhancing pharmacological potency and selectivity. Nevertheless, concerns about off-target modification motivate the development of reversible cysteine-targeting strategies. Here we show that electron-deficient olefins, including acrylamides, can be tuned to react with cysteine thiols in a rapidly reversible manner. Installation of a nitrile group increased the olefins' intrinsic reactivity, but, paradoxically, eliminated the formation of irreversible adducts. Incorporation of these electrophiles into a noncovalent kinase-recognition scaffold produced slowly dissociating, covalent inhibitors of the p90 ribosomal protein S6 kinase RSK2. A cocrystal structure revealed specific noncovalent interactions that stabilize the complex by positioning the electrophilic carbon near the targeted cysteine. Disruption of these interactions by protein unfolding or proteolysis promoted instantaneous cleavage of the covalent bond. Our results establish a chemistry-based framework for engineering sustained covalent inhibition without accumulating permanently modified proteins and peptides.


    Organizational Affiliation

    Graduate Program in Chemistry and Chemical Biology, University of California-San Francisco, San Francisco, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribosomal protein S6 kinase alpha-3
A
342Homo sapiensMutation(s): 1 
Gene Names: RPS6KA3 (ISPK1, MAPKAPK1B, RSK2)
EC: 2.7.11.1
Find proteins for P51812 (Homo sapiens)
Go to Gene View: RPS6KA3
Go to UniProtKB:  P51812
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
0JH
Query on 0JH

Download SDF File 
Download CCD File 
A
tert-butyl (2S)-3-[4-amino-7-(3-hydroxypropyl)-5-(4-methylphenyl)-7H-pyrrolo[2,3-d]pyrimidin-6-yl]-2-cyanopropanoate
(E)-tert-butyl 3-(4-amino-7-(3-hydroxypropyl)-5-p-tolyl-7H-pyrrolo[2,3-d]pyrimidin-6-yl)-2-cyanoacrylate, bound form
C24 H29 N5 O3
YQNJEMHLWSEPFO-KRWDZBQOSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.204 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 46.700α = 90.00
b = 46.700β = 90.00
c = 293.000γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
XSCALEdata scaling
PHENIXphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-11
    Type: Initial release
  • Version 1.1: 2012-04-25
    Type: Database references
  • Version 1.2: 2012-05-16
    Type: Database references