CH2 chimera of human 14-3-3 sigma with the Gli1 phosphopeptide around Ser640

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.220 

wwPDB Validation   3D Report Full Report

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Chimeric 14-3-3 proteins for unraveling interactions with intrinsically disordered partners.

Sluchanko, N.N.Tugaeva, K.V.Greive, S.J.Antson, A.A.

(2017) Sci Rep 7: 12014-12014

  • DOI: https://doi.org/10.1038/s41598-017-12214-9
  • Primary Citation of Related Structures:  
    5OK9, 5OKF, 5OM0, 5OMA

  • PubMed Abstract: 

    In eukaryotes, several "hub" proteins integrate signals from different interacting partners that bind through intrinsically disordered regions. The 14-3-3 protein hub, which plays wide-ranging roles in cellular processes, has been linked to numerous human disorders and is a promising target for therapeutic intervention. Partner proteins usually bind via insertion of a phosphopeptide into an amphipathic groove of 14-3-3. Structural plasticity in the groove generates promiscuity allowing accommodation of hundreds of different partners. So far, accurate structural information has been derived for only a few 14-3-3 complexes with phosphopeptide-containing proteins and a variety of complexes with short synthetic peptides. To further advance structural studies, here we propose a novel approach based on fusing 14-3-3 proteins with the target partner peptide sequences. Such chimeric proteins are easy to design, express, purify and crystallize. Peptide attachment to the C terminus of 14-3-3 via an optimal linker allows its phosphorylation by protein kinase A during bacterial co-expression and subsequent binding at the amphipathic groove. Crystal structures of 14-3-3 chimeras with three different peptides provide detailed structural information on peptide-14-3-3 interactions. This simple but powerful approach, employing chimeric proteins, can reinvigorate studies of 14-3-3/phosphoprotein assemblies, including those with challenging low-affinity partners, and may facilitate the design of novel biosensors.

  • Organizational Affiliation

    A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 119071, Moscow, Russian Federation. nikolai.sluchanko@mail.ru.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
14-3-3 protein sigma,Zinc finger protein GLI1
A, B
248Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for P08151 (Homo sapiens)
Explore P08151 
Go to UniProtKB:  P08151
PHAROS:  P08151
GTEx:  ENSG00000111087 
Find proteins for P31947 (Homo sapiens)
Explore P31947 
Go to UniProtKB:  P31947
PHAROS:  P31947
GTEx:  ENSG00000175793 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP08151P31947
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.20 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.220 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.426α = 90
b = 110.426β = 90
c = 174.114γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Russian Science FoundationRussian Federation17-74-10053
Wellcome TrustUnited Kingdom101528
Wellcome TrustUnited Kingdom098230

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-11
    Type: Initial release
  • Version 1.1: 2017-10-25
    Changes: Source and taxonomy
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description