PaToxG Glycosyltransferase

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 

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This is version 1.3 of the entry. See complete history


A bacterial toxin catalyzing tyrosine glycosylation of Rho and deamidation of Gq and Gi proteins.

Jank, T.Bogdanovic, X.Wirth, C.Haaf, E.Spoerner, M.Bohmer, K.E.Steinemann, M.Orth, J.H.Kalbitzer, H.R.Warscheid, B.Hunte, C.Aktories, K.

(2013) Nat Struct Mol Biol 20: 1273-1280

  • DOI: https://doi.org/10.1038/nsmb.2688
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Entomopathogenic Photorhabdus asymbiotica is an emerging pathogen in humans. Here, we identified a P. asymbiotica protein toxin (PaTox), which contains a glycosyltransferase and a deamidase domain. PaTox mono-O-glycosylates Y32 (or Y34) of eukaryotic Rho GTPases by using UDP-N-acetylglucosamine (UDP-GlcNAc). Tyrosine glycosylation inhibits Rho activation and prevents interaction with downstream effectors, resulting in actin disassembly, inhibition of phagocytosis and toxicity toward insects and mammalian cells. The crystal structure of the PaTox glycosyltransferase domain in complex with UDP-GlcNAc determined at 1.8-Å resolution represents a canonical GT-A fold and is the smallest glycosyltransferase toxin known. (1)H-NMR analysis identifies PaTox as a retaining glycosyltransferase. The glutamine-deamidase domain of PaTox blocks GTP hydrolysis of heterotrimeric Gαq/11 and Gαi proteins, thereby activating RhoA. Thus, PaTox hijacks host GTPase signaling in a bidirectional manner by deamidation-induced activation and glycosylation-induced inactivation of GTPases.

  • Organizational Affiliation

    Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative insecticidal toxin
A, B
336Photorhabdus asymbiotica subsp. asymbiotica ATCC 43949Mutation(s): 0 
Gene Names: PAU_02230
EC: 2.4.1
Find proteins for C7BKP9 (Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77))
Explore C7BKP9 
Go to UniProtKB:  C7BKP9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC7BKP9
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 145.817α = 90
b = 42.127β = 99.52
c = 116.367γ = 90
Software Package:
Software NamePurpose
RemDAqdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-10-16
    Type: Initial release
  • Version 1.1: 2013-11-06
    Changes: Database references
  • Version 1.2: 2013-11-20
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Refinement description