6CGI

Structure of Salmonella Effector SseK3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Salmonella Effectors SseK1 and SseK3 Target Death Domain Proteins in the TNF and TRAIL Signaling Pathways.

Newson, J.P.M.Scott, N.E.Yeuk Wah Chung, I.Wong Fok Lung, T.Giogha, C.Gan, J.Wang, N.Strugnell, R.A.Brown, N.F.Cygler, M.Pearson, J.S.Hartland, E.L.

(2019) Mol Cell Proteomics 18: 1138-1156

  • DOI: 10.1074/mcp.RA118.001093
  • Primary Citation of Related Structures:  
    6DUS, 6CGI

  • PubMed Abstract: 
  • Strains of Salmonella utilize two distinct type three secretion systems to deliver effector proteins directly into host cells. The Salmonella effectors SseK1 and SseK3 are arginine glycosyltransferases that modify mammalian death domain containing proteins with N -acetyl glucosamine (GlcNAc) when overexpressed ectopically or as recombinant protein fusions ...

    Strains of Salmonella utilize two distinct type three secretion systems to deliver effector proteins directly into host cells. The Salmonella effectors SseK1 and SseK3 are arginine glycosyltransferases that modify mammalian death domain containing proteins with N -acetyl glucosamine (GlcNAc) when overexpressed ectopically or as recombinant protein fusions. Here, we combined Arg-GlcNAc glycopeptide immunoprecipitation and mass spectrometry to identify host proteins GlcNAcylated by endogenous levels of SseK1 and SseK3 during Salmonella infection. We observed that SseK1 modified the mammalian signaling protein TRADD, but not FADD as previously reported. Overexpression of SseK1 greatly broadened substrate specificity, whereas ectopic co-expression of SseK1 and TRADD increased the range of modified arginine residues within the death domain of TRADD. In contrast, endogenous levels of SseK3 resulted in modification of the death domains of receptors of the mammalian TNF superfamily, TNFR1 and TRAILR, at residues Arg 376 and Arg 293 respectively. Structural studies on SseK3 showed that the enzyme displays a classic GT-A glycosyltransferase fold and binds UDP-GlcNAc in a narrow and deep cleft with the GlcNAc facing the surface. Together our data suggest that salmonellae carrying sseK1 and sseK3 employ the glycosyltransferase effectors to antagonise different components of death receptor signaling.


    Organizational Affiliation

    ‖Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type III secretion system effector proteinA, B, C, D314Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344Mutation(s): 0 
Gene Names: 
UniProt
Find proteins for A0A0H3NMP8 (Salmonella typhimurium (strain SL1344))
Explore A0A0H3NMP8 
Go to UniProtKB:  A0A0H3NMP8
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UDP (Subject of Investigation/LOI)
Query on UDP

Download Ideal Coordinates CCD File 
E [auth A], F [auth B], G [auth C], H [auth D]URIDINE-5'-DIPHOSPHATE
C9 H14 N2 O12 P2
XCCTYIAWTASOJW-XVFCMESISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.54α = 90
b = 96.17β = 93.28
c = 90.71γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
AutoSolphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-28
    Type: Initial release
  • Version 1.1: 2019-06-26
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-06
    Changes: Author supporting evidence, Data collection