3RDH

X-ray induced covalent inhibition of 14-3-3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Discovery and structural characterization of a small molecule 14-3-3 protein-protein interaction inhibitor.

Zhao, J.Du, Y.Horton, J.R.Upadhyay, A.K.Lou, B.Bai, Y.Zhang, X.Du, L.Li, M.Wang, B.Zhang, L.Barbieri, J.T.Khuri, F.R.Cheng, X.Fu, H.

(2011) Proc.Natl.Acad.Sci.USA 108: 16212-16216

  • DOI: 10.1073/pnas.1100012108

  • PubMed Abstract: 
  • The 14-3-3 family of phosphoserine/threonine-recognition proteins engage multiple nodes in signaling networks that control diverse physiological and pathophysiological functions and have emerged as promising therapeutic targets for such diseases as c ...

    The 14-3-3 family of phosphoserine/threonine-recognition proteins engage multiple nodes in signaling networks that control diverse physiological and pathophysiological functions and have emerged as promising therapeutic targets for such diseases as cancer and neurodegenerative disorders. Thus, small molecule modulators of 14-3-3 are much needed agents for chemical biology investigations and therapeutic development. To analyze 14-3-3 function and modulate its activity, we conducted a chemical screen and identified 4-[(2Z)-2-[4-formyl-6-methyl-5-oxo-3-(phosphonatooxymethyl)pyridin-2-ylidene]hydrazinyl]benzoate as a 14-3-3 inhibitor, which we termed FOBISIN (FOurteen-three-three BInding Small molecule INhibitor) 101. FOBISIN101 effectively blocked the binding of 14-3-3 with Raf-1 and proline-rich AKT substrate, 40 kD(a) and neutralized the ability of 14-3-3 to activate exoenzyme S ADP-ribosyltransferase. To provide a mechanistic basis for 14-3-3 inhibition, the crystal structure of 14-3-3ΞΆ in complex with FOBISIN101 was solved. Unexpectedly, the double bond linking the pyridoxal-phosphate and benzoate moieties was reduced by X-rays to create a covalent linkage of the pyridoxal-phosphate moiety to lysine 120 in the binding groove of 14-3-3, leading to persistent 14-3-3 inactivation. We suggest that FOBISIN101-like molecules could be developed as an entirely unique class of 14-3-3 inhibitors, which may serve as radiation-triggered therapeutic agents for the treatment of 14-3-3-mediated diseases, such as cancer.


    Organizational Affiliation

    Department of Pharmacology, Emory UniversitySchool of Medicine, Atlanta, GA 30322, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein zeta/delta
A, B, C, D
248Homo sapiensMutation(s): 0 
Gene Names: YWHAZ
Find proteins for P63104 (Homo sapiens)
Go to Gene View: YWHAZ
Go to UniProtKB:  P63104
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3RD
Query on 3RD

Download SDF File 
Download CCD File 
A, B, C, D
4-[(E)-{4-formyl-5-hydroxy-6-methyl-3-[(phosphonooxy)methyl]pyridin-2-yl}diazenyl]benzoic acid
FOBISIN101
C15 H14 N3 O8 P
NPBWMMRUXMTIRC-ISLYRVAYSA-N
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
A, B, C, D
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
3RDIC50: 9300 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.235 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 94.745α = 90.00
b = 94.745β = 90.00
c = 237.862γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
HKL-2000data scaling
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-28
    Type: Initial release
  • Version 1.1: 2011-10-12
    Type: Database references