5LTW

Complex of human 14-3-3 sigma CLU1 mutant with phosphorylated heat shock protein B6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.5 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for the Interaction of a Human Small Heat Shock Protein with the 14-3-3 Universal Signaling Regulator.

Sluchanko, N.N.Beelen, S.Kulikova, A.A.Weeks, S.D.Antson, A.A.Gusev, N.B.Strelkov, S.V.

(2017) Structure 25: 305-316

  • DOI: 10.1016/j.str.2016.12.005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • By interacting with hundreds of protein partners, 14-3-3 proteins coordinate vital cellular processes. Phosphorylation of the small heat shock protein, HSPB6, within its intrinsically disordered N-terminal domain activates its interaction with 14-3-3 ...

    By interacting with hundreds of protein partners, 14-3-3 proteins coordinate vital cellular processes. Phosphorylation of the small heat shock protein, HSPB6, within its intrinsically disordered N-terminal domain activates its interaction with 14-3-3, ultimately triggering smooth muscle relaxation. After analyzing the binding of an HSPB6-derived phosphopeptide to 14-3-3 using isothermal calorimetry and X-ray crystallography, we have determined the crystal structure of the complete assembly consisting of the 14-3-3 dimer and full-length HSPB6 dimer and further characterized this complex in solution using fluorescence spectroscopy, small-angle X-ray scattering, and limited proteolysis. We show that selected intrinsically disordered regions of HSPB6 are transformed into well-defined conformations upon the interaction, whereby an unexpectedly asymmetric structure is formed. This structure provides the first atomic resolution snapshot of a human small HSP in functional state, explains how 14-3-3 proteins sequester their regulatory partners, and can inform the design of small-molecule interaction modifiers to be used as myorelaxants.


    Organizational Affiliation

    Department of Biochemistry, School of Biology, Moscow State University, 119991 Moscow, Russia.,Laboratory of Structural Biochemistry of Proteins, A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, 119071 Moscow, Russia. Electronic address: nikolai.sluchanko@mail.ru.,Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium.,Laboratory of Protein Conformational Polymorphism in Health and Disease, Engelhardt Institute of Molecular Biology, 119991 Moscow, Russia.,York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5YW, UK.,Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium. Electronic address: sergei.strelkov@kuleuven.be.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein sigma
A, B, E, F, I, J
234Homo sapiensMutation(s): 3 
Gene Names: SFN (HME1)
Find proteins for P31947 (Homo sapiens)
Go to Gene View: SFN
Go to UniProtKB:  P31947
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein beta-6
C, D, G, H, K, L
149Homo sapiensMutation(s): 0 
Gene Names: HSPB6
Find proteins for O14558 (Homo sapiens)
Go to Gene View: HSPB6
Go to UniProtKB:  O14558
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download SDF File 
Download CCD File 
D, H, L
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

Download SDF File 
Download CCD File 
A, B, E, F, I, J
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
TRIS BUFFER
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
C, D, G, H, K, L
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.5 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.236 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 125.060α = 90.00
b = 341.290β = 90.00
c = 144.550γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
MOLREPphasing
XSCALEdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Russian Foundation for Basic ResearchRussian Federation14-04-00146
Wellcome TrustUnited Kingdom098230
FWOBelgiumG069708N, G093615N, WO03315N
Russian Foundation for Basic ResearchRussian Federation16-04-00016

Revision History 

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2017-02-15
    Type: Database references