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 
  • R-Value Observed: 0.290 

wwPDB Validation 3D Report Full Report



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:  
    6GN8, 6GN0, 6GNN, 6GNJ, 6GNK

  • 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. herwig.schuler@ki.se.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14-3-3 protein beta/alphaA248Homo sapiensMutation(s): 0 
Gene Names: YWHAB
Find proteins for P31946 (Homo sapiens)
Explore P31946 
Go to UniProtKB:  P31946
NIH Common Fund Data Resources
PHAROS  P31946
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Exoenzyme TC246Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: exoTPA0044
EC: 2.4.2.31
Find proteins for Q9I788 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I788 
Go to UniProtKB:  Q9I788
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
F4W
Query on F4W

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 
  • R-Value Observed: 0.290 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.378α = 90
b = 60.301β = 90
c = 81.19γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DIALSdata reduction
DIALSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
SwedenSB12-0022

Revision History 

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