6GJH

Human Hsp27 (HspB1) alpha-crystallin domain in complex with a peptide mimic of its phosphorylatable N-terminal region


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

HspB1 phosphorylation regulates its intramolecular dynamics and mechanosensitive molecular chaperone interaction with filamin C.

Collier, M.P.Alderson, T.R.de Villiers, C.P.Nicholls, D.Gastall, H.Y.Allison, T.M.Degiacomi, M.T.Jiang, H.Mlynek, G.Furst, D.O.van der Ven, P.F.M.Djinovic-Carugo, K.Baldwin, A.J.Watkins, H.Gehmlich, K.Benesch, J.L.P.

(2019) Sci Adv 5: eaav8421-eaav8421

  • DOI: 10.1126/sciadv.aav8421

  • PubMed Abstract: 
  • Mechanical force-induced conformational changes in proteins underpin a variety of physiological functions, typified in muscle contractile machinery. Mutations in the actin-binding protein filamin C (FLNC) are linked to musculoskeletal pathologies cha ...

    Mechanical force-induced conformational changes in proteins underpin a variety of physiological functions, typified in muscle contractile machinery. Mutations in the actin-binding protein filamin C (FLNC) are linked to musculoskeletal pathologies characterized by altered biomechanical properties and sometimes aggregates. HspB1, an abundant molecular chaperone, is prevalent in striated muscle where it is phosphorylated in response to cues including mechanical stress. We report the interaction and up-regulation of both proteins in three mouse models of biomechanical stress, with HspB1 being phosphorylated and FLNC being localized to load-bearing sites. We show how phosphorylation leads to increased exposure of the residues surrounding the HspB1 phosphosite, facilitating their binding to a compact multidomain region of FLNC proposed to have mechanosensing functions. Steered unfolding of FLNC reveals that its extension trajectory is modulated by the phosphorylated region of HspB1. This may represent a posttranslationally regulated chaperone-client protection mechanism targeting over-extension during mechanical stress.


    Organizational Affiliation

    Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK.,Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK.,Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.,Biomolecular Interaction Centre and School of Physical and Chemical Sciences, University of Canterbury, Christchurch 8140, New Zealand.,Department of Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ve─Źna pot 113, 1000 Ljubljana, Slovenia.,Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Headington, Oxford OX3 9DU, UK.,Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, D53121 Bonn, Germany.,Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, A-1030 Vienna, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein beta-1
A, B, E, F, G, H, C, D
87Homo sapiensMutation(s): 0 
Gene Names: HSPB1 (HSP27, HSP28)
Find proteins for P04792 (Homo sapiens)
Go to Gene View: HSPB1
Go to UniProtKB:  P04792
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ALA-LEU-SER-ARG-GLN
K
5N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
LEU-SER-GLY-VAL
J
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
ALA-LEU-SER-ARG
L, I
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 56.810α = 90.00
b = 157.670β = 95.45
c = 57.870γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/K004247/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/J018082/1

Revision History 

  • Version 1.0: 2019-05-29
    Type: Initial release
  • Version 1.1: 2019-06-12
    Type: Data collection, Database references