Crystal structure of RIPK1 death domain GlcNAcylated by EPEC effector NleB

Experimental Data Snapshot

  • Resolution: 1.45 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.157 

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Structural and Functional Insights into Host Death Domains Inactivation by the Bacterial Arginine GlcNAcyltransferase Effector.

Ding, J.Pan, X.Du, L.Yao, Q.Xue, J.Yao, H.Wang, D.C.Li, S.Shao, F.

(2019) Mol Cell 74: 922

  • DOI: https://doi.org/10.1016/j.molcel.2019.03.028
  • Primary Citation of Related Structures:  
    6AC0, 6AC5, 6ACI, 6E66

  • PubMed Abstract: 

    Enteropathogenic E. coli NleB and related type III effectors catalyze arginine GlcNAcylation of death domain (DD) proteins to block host defense, but the underlying mechanism is unknown. Here we solve crystal structures of NleB alone and in complex with FADD-DD, UDP, and Mn 2+ as well as NleB-GlcNAcylated DDs of TRADD and RIPK1. NleB adopts a GT-A fold with a unique helix-pair insertion to hold FADD-DD; the interface contacts explain the selectivity of NleB for certain DDs. The acceptor arginine is fixed into a cleft, in which Glu253 serves as a base to activate the guanidinium. Analyses of the enzyme-substrate complex and the product structures reveal an inverting sugar-transfer reaction and a detailed catalytic mechanism. These structural insights are validated by mutagenesis analyses of NleB-mediated GlcNAcylation in vitro and its function in mouse infection. Our study builds a structural framework for understanding of NleB-catalyzed arginine GlcNAcylation of host death domain.

  • Organizational Affiliation

    National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; National Institute of Biological Sciences, Beijing 102206, China. Electronic address: jding@ibp.ac.cn.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Receptor-interacting serine/threonine-protein kinase 1111Homo sapiensMutation(s): 0 
Gene Names: RIPK1RIPRIP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13546 (Homo sapiens)
Explore Q13546 
Go to UniProtKB:  Q13546
PHAROS:  Q13546
GTEx:  ENSG00000137275 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13546
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.45 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.157 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.75α = 90
b = 55.75β = 90
c = 59.15γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata 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: 2019-05-01
    Type: Initial release
  • Version 1.1: 2019-06-26
    Changes: Data collection, Database references
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Refinement description, Structure summary