5LUM

Alpha-crystallin domain of human HSPB6 patched with its N-terminal peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 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
Heat shock protein beta-6
F, G, H, I, J
9Homo sapiensMutation(s): 0 
Gene Names: HSPB6
Find proteins for O14558 (Homo sapiens)
Go to Gene View: HSPB6
Go to UniProtKB:  O14558
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein beta-6
A, B, C, D, E
78Homo sapiensMutation(s): 0 
Gene Names: HSPB6
Find proteins for O14558 (Homo sapiens)
Go to Gene View: HSPB6
Go to UniProtKB:  O14558
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, D, E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 105.687α = 90.00
b = 105.687β = 90.00
c = 111.950γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
MOLREPphasing
XSCALEdata scaling
BUSTER-TNTrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
RFBRRussian Federation14-04-00146, 16-04-00016
FWOBelgiumG069708N, G093615N and WO03315N
KULeuven grantBelgiumOT13/097
Wellcome TrustUnited Kingdom098230
Biostruct-XBelgium283570
European UnionBelgiumFP7/2007-2013
European Molecular Biology OrganizationBelgiumASTF#637-2014

Revision History 

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2017-02-15
    Type: Database references
  • Version 1.2: 2017-09-06
    Type: Author supporting evidence