6GN8

Exoenzyme S from Pseudomonas aeruginosa in complex with human 14-3-3 protein beta, trimeric crystal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

14-3-3 proteins activate Pseudomonas exotoxins-S and -T by chaperoning a hydrophobic surface.

Karlberg, T.Hornyak, P.Pinto, A.F.Milanova, S.Ebrahimi, M.Lindberg, M.Pullen, N.Nordstrom, A.Loverli, E.Caraballo, R.Wong, E.V.Nareoja, K.Thorsell, A.G.Elofsson, M.De La Cruz, E.M.Bjorkegren, C.Schuler, H.

(2018) Nat Commun 9: 3785-3785

  • DOI: 10.1038/s41467-018-06194-1
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pseudomonas are a common cause of hospital-acquired infections that may be lethal. ADP-ribosyltransferase activities of Pseudomonas exotoxin-S and -T depend on 14-3-3 proteins inside the host cell. By binding in the 14-3-3 phosphopeptide binding groo ...

    Pseudomonas are a common cause of hospital-acquired infections that may be lethal. ADP-ribosyltransferase activities of Pseudomonas exotoxin-S and -T depend on 14-3-3 proteins inside the host cell. By binding in the 14-3-3 phosphopeptide binding groove, an amphipathic C-terminal helix of ExoS and ExoT has been thought to be crucial for their activation. However, crystal structures of the 14-3-3β:ExoS and -ExoT complexes presented here reveal an extensive hydrophobic interface that is sufficient for complex formation and toxin activation. We show that C-terminally truncated ExoS ADP-ribosyltransferase domain lacking the amphipathic binding motif is active when co-expressed with 14-3-3. Moreover, swapping the amphipathic C-terminus with a fragment from Vibrio Vis toxin creates a 14-3-3 independent toxin that ADP-ribosylates known ExoS targets. Finally, we show that 14-3-3 stabilizes ExoS against thermal aggregation. Together, this indicates that 14-3-3 proteins activate exotoxin ADP-ribosyltransferase domains by chaperoning their hydrophobic surfaces independently of the amphipathic C-terminal segment.


    Organizational Affiliation

    Department of Biosciences and Nutrition, Karolinska Institutet, Hälsovägen 4c, 14157, Huddinge, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein beta/alpha
A, B
243Homo sapiensMutation(s): 0 
Gene Names: YWHAB
Find proteins for P31946 (Homo sapiens)
Go to Gene View: YWHAB
Go to UniProtKB:  P31946
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Exoenzyme S
C
244Pseudomonas aeruginosaMutation(s): 2 
Gene Names: exoS
Find proteins for Q93SQ1 (Pseudomonas aeruginosa)
Go to UniProtKB:  Q93SQ1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download SDF File 
Download CCD File 
C
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.200 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 159.909α = 90.00
b = 59.401β = 125.79
c = 120.333γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
BUSTERrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
SwedenSB12-0022

Revision History 

  • Version 1.0: 2018-09-26
    Type: Initial release