6GNN

Exoenzyme T from Pseudomonas aeruginosa in complex with human 14-3-3 protein beta, tetrameric crystal form bound to STO1101


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.79 Å
  • R-Value Free: 0.385 
  • R-Value Work: 0.285 

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

    University of California, San Francisco Medical School, Department of Biochemistry and Biophysics, San Francisco, CA, 94158, USA.,Protein Expertise Platform, Umeå University, Kemihuset, 90187, Umeå, Sweden.,Department of Cellular and Molecular Biology, Karolinska Institutet, Berzelius väg 35, 17165, Solna, Sweden.,Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06520, USA.,Department of Chemistry, Umeå University, Kemihuset, 90187, Umeå, Sweden.,Department of Biosciences and Nutrition, Karolinska Institutet, Hälsovägen 4c, 14157, Huddinge, Sweden. herwig.schuler@ki.se.,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
248Homo 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 T
C
246Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: exoT
Find proteins for Q9I788 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I788
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
F4W
Query on F4W

Download SDF File 
Download CCD File 
C
3-(12-oxidanylidene-7-thia-9,11-diazatricyclo[6.4.0.0^{2,6}]dodeca-1(8),2(6),9-trien-10-yl)propanoic acid
C12 H12 N2 O3 S
XKPJAYXICQQVTD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.79 Å
  • R-Value Free: 0.385 
  • R-Value Work: 0.285 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 115.378α = 90.00
b = 60.301β = 90.00
c = 81.190γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
DIALSdata reduction
DIALSdata 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