3SMM

Crystal structure of human 14-3-3 sigma C38N/N166H in complex with task-3 peptide and stabilizer Fusicoccin J aglycone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.169 

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Ligand Structure Quality Assessment 


This is version 1.2 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:  
    3UX0, 4FR3, 3P1N, 3P1O, 3P1P, 3P1Q, 3P1R, 3P1S, 3SMK, 3SML, 3SMM, 3SMN, 3SMO, 3SP5, 3SPR

  • 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 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 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14-3-3 protein sigmaA236Homo sapiensMutation(s): 2 
Gene Names: HME1SFN
UniProt & NIH Common Fund Data Resources
Find proteins for P31947 (Homo sapiens)
Explore P31947 
Go to UniProtKB:  P31947
PHAROS:  P31947
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TASK-3 peptideB [auth P]6Homo sapiensMutation(s): 0 
Gene Names: KCNK9TASK3
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NPC2 (Homo sapiens)
Explore Q9NPC2 
Go to UniProtKB:  Q9NPC2
PHAROS:  Q9NPC2
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FJA (Subject of Investigation/LOI)
Query on FJA

Download Ideal Coordinates CCD File 
C [auth A]Fusicoccin J aglycone
C21 H34 O4
YZZBBYUVOSVRJT-KFPAJSSTSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
F [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A], E [auth A], G [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B [auth P]L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.169 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.11α = 90
b = 111.58β = 90
c = 62.41γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345data collection
XDSdata reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-07-11
    Type: Initial release
  • Version 1.1: 2017-06-07
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description