5LUM

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 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: https://doi.org/10.1016/j.str.2016.12.005
  • Primary Citation of Related Structures:  
    5LTW, 5LU1, 5LU2, 5LUM

  • 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, 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

    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.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heat shock protein beta-6A [auth F],
C [auth G],
E [auth H],
G [auth I],
I [auth J]
9Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O14558 (Homo sapiens)
Explore O14558 
Go to UniProtKB:  O14558
PHAROS:  O14558
GTEx:  ENSG00000004776 
Entity Groups  
UniProt GroupO14558
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Heat shock protein beta-6B [auth A],
D [auth B],
F [auth C],
H [auth D],
J [auth E]
78Homo sapiensMutation(s): 0 
Gene Names: HSPB6
UniProt & NIH Common Fund Data Resources
Find proteins for O14558 (Homo sapiens)
Explore O14558 
Go to UniProtKB:  O14558
PHAROS:  O14558
GTEx:  ENSG00000004776 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14558
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.687α = 90
b = 105.687β = 90
c = 111.95γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report



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  (Full details and data files)

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2017-02-15
    Changes: Database references
  • Version 1.2: 2017-09-06
    Changes: Author supporting evidence
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Refinement description