4FR3

Crystal structure of human 14-3-3 sigma in complex with TASK-3 peptide and stabilizer 16-O-Me-FC-H


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A semisynthetic fusicoccane stabilizes a protein-protein interaction and enhances the expression of k(+) channels at the cell surface.

Anders, C.Higuchi, Y.Koschinsky, K.Bartel, M.Schumacher, B.Thiel, P.Nitta, H.Preisig-Muller, R.Schlichthorl, G.Renigunta, V.Ohkanda, J.Daut, J.Kato, N.Ottmann, C.

(2013) Chem.Biol. 20: 583-593

  • DOI: 10.1016/j.chembiol.2013.03.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Small-molecule stabilization of protein-protein interactions is an emerging field in chemical biology. We show how fusicoccanes, originally identified as fungal toxins acting on plants, promote the interaction of 14-3-3 proteins with the human potass ...

    Small-molecule stabilization of protein-protein interactions is an emerging field in chemical biology. We show how fusicoccanes, originally identified as fungal toxins acting on plants, promote the interaction of 14-3-3 proteins with the human potassium channel TASK-3 and present a semisynthetic fusicoccane derivative (FC-THF) that targets the 14-3-3 recognition motif (mode 3) in TASK-3. In the presence of FC-THF, the binding of 14-3-3 proteins to TASK-3 was increased 19-fold and protein crystallography provided the atomic details of the effects of FC-THF on this interaction. We also tested the functional effects of FC-THF on TASK channels heterologously expressed in Xenopus oocytes. Incubation with 10 μM FC-THF was found to promote the transport of TASK channels to the cell membrane, leading to a significantly higher density of channels at the surface membrane and increased potassium current.


    Organizational Affiliation

    Chemical Genomics Centre of the Max-Planck-Society, 44227 Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein sigma
A
234Homo sapiensMutation(s): 0 
Gene Names: SFN (HME1)
Find proteins for P31947 (Homo sapiens)
Go to Gene View: SFN
Go to UniProtKB:  P31947
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TASK-3 peptide
P
6Homo sapiensMutation(s): 0 
Gene Names: KCNK9 (TASK3)
Find proteins for Q9NPC2 (Homo sapiens)
Go to Gene View: KCNK9
Go to UniProtKB:  Q9NPC2
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0V4
Query on 0V4

Download SDF File 
Download CCD File 
A
(4R,5R,6R,6aS,9S,9aE,10aR)-5-hydroxy-9-(methoxymethyl)-6,10a-dimethyl-3-(propan-2-yl)-1,2,4,5,6,6a,7,8,9,10a-decahydrodicyclopenta[a,d][8]annulen-4-yl alpha-D-glucopyranoside
16-O-Me-Fusicoccin H
C27 H44 O8
ZKINNMSFCCOPQI-MKYFCGQTSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
SEP
Query on SEP
P
L-PEPTIDE LINKINGC3 H8 N O6 PSER
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0V4Kd: 70 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.168 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 81.680α = 90.00
b = 111.990β = 90.00
c = 62.970γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
MAR345data collection
REFMACrefinement
PHASERphasing
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-08
    Type: Initial release
  • Version 1.1: 2017-11-15
    Type: Advisory, Refinement description