6FHK

Structure of a modified protein containing a genetically encoded phosphoserine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

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Literature

Mitotic phosphorylation regulates Hsp72 spindle localization by uncoupling ATP binding from substrate release.

Mukherjee, M.Sabir, S.O'Regan, L.Sampson, J.Richards, M.W.Huguenin-Dezot, N.Ault, J.R.Chin, J.W.Zhuravleva, A.Fry, A.M.Bayliss, R.

(2018) Sci Signal 11

  • DOI: 10.1126/scisignal.aao2464
  • Primary Citation of Related Structures:  
    6FHK

  • PubMed Abstract: 
  • Hsp72 is a member of the 70-kDa heat shock family of molecular chaperones (Hsp70s) that comprise a nucleotide-binding domain (NBD) and a substrate-binding domain (SBD) connected by a linker that couples the exchange of adenosine diphosphate (ADP) for adenosine triphosphate (ATP) with the release of the protein substrate ...

    Hsp72 is a member of the 70-kDa heat shock family of molecular chaperones (Hsp70s) that comprise a nucleotide-binding domain (NBD) and a substrate-binding domain (SBD) connected by a linker that couples the exchange of adenosine diphosphate (ADP) for adenosine triphosphate (ATP) with the release of the protein substrate. Mitotic phosphorylation of Hsp72 by the kinase NEK6 at Thr 66 located in the NBD promotes the localization of Hsp72 to the mitotic spindle and is required for efficient spindle assembly and chromosome congression and segregation. We determined the crystal structure of the Hsp72 NBD containing a genetically encoded phosphoserine at position 66. This revealed structural changes that stabilized interactions between subdomains within the NBD. ATP binding to the NBD of unmodified Hsp72 resulted in the release of substrate from the SBD, but phosphorylated Hsp72 retained substrate in the presence of ATP. Mutations that prevented phosphorylation-dependent subdomain interactions restored the connection between ATP binding and substrate release. Thus, phosphorylation of Thr 66 is a reversible mechanism that decouples the allosteric connection between nucleotide binding and substrate release, providing further insight into the regulation of the Hsp70 family. We propose that phosphorylation of Hsp72 on Thr 66 by NEK6 during mitosis promotes its localization to the spindle by stabilizing its interactions with components of the mitotic spindle.


    Related Citations: 
    • Mitotic phosphorylation regulates Hsp72 spindle localization by uncoupling ATP binding from substrate release.
      Mukherjee, M., Sabir, S., O'Regan, L., Sampson, J., Richards, M.W., Huguenin-Dezot, N., Ault, J.R., Chin, J.W., Zhuravleva, A., Fry, A.M., Bayliss, R.
      (2018) Sci Signal 11: --

    Organizational Affiliation

    Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK. r.w.bayliss@leeds.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock 70 kDa protein 1AA, B381Homo sapiensMutation(s): 0 
Gene Names: HSPA1AHSP72HSPA1HSX70
UniProt & NIH Common Fund Data Resources
Find proteins for P0DMV8 (Homo sapiens)
Explore P0DMV8 
Go to UniProtKB:  P0DMV8
PHAROS:  P0DMV8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DMV8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B L-PEPTIDE LINKINGC3 H8 N O6 PSER
Binding Affinity Annotations 
IDSourceBinding Affinity
ADP BindingDB:  6FHK Kd: min: 320, max: 324 (nM) from 2 assay(s)
IC50: 280 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.625α = 90
b = 110.876β = 90.41
c = 63.483γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/L023113/1
Cancer Research UKUnited KingdomC24461/A12772

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-24
    Type: Initial release