5OK9

CH1 chimera of human 14-3-3 sigma with the HSPB6 phosphopeptide in a conformation with swapped phosphopeptides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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: 10.1038/s41598-017-12214-9
  • Primary Citation of Related Structures:  

  • 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 ...

    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.,Department of biophysics, School of Biology, Moscow State University, 119991, Moscow, Russian Federation. nikolai.sluchanko@mail.ru.,A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 119071, Moscow, Russian Federation.,Department of biochemistry, School of Biology, Moscow State University, 119991, Moscow, Russian Federation.,York Structural Biology Laboratory, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein sigma,Heat shock protein beta-6
A, B, E, F
246Homo sapiensMutation(s): 3 
Gene Names: HSPB6, SFN (HME1)
Find proteins for O14558 (Homo sapiens)
Go to Gene View: HSPB6
Go to UniProtKB:  O14558
Find proteins for P31947 (Homo sapiens)
Go to Gene View: SFN
Go to UniProtKB:  P31947
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, B, F
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B, E, F
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 63.631α = 90.00
b = 140.635β = 114.75
c = 68.663γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
PDB_EXTRACTdata extraction
MOLREPphasing
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


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

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release
  • Version 1.1: 2017-10-25
    Type: Source and taxonomy
  • Version 1.2: 2019-03-13
    Type: Data collection, Derived calculations
  • Version 1.3: 2019-07-10
    Type: Data collection