Crystal structure of the BtTir TIR domain

Experimental Data Snapshot

  • Resolution: 1.42 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Cyclic ADP ribose isomers: Production, chemical structures, and immune signaling.

Manik, M.K.Shi, Y.Li, S.Zaydman, M.A.Damaraju, N.Eastman, S.Smith, T.G.Gu, W.Masic, V.Mosaiab, T.Weagley, J.S.Hancock, S.J.Vasquez, E.Hartley-Tassell, L.Kargios, N.Maruta, N.Lim, B.Y.J.Burdett, H.Landsberg, M.J.Schembri, M.A.Prokes, I.Song, L.Grant, M.DiAntonio, A.Nanson, J.D.Guo, M.Milbrandt, J.Ve, T.Kobe, B.

(2022) Science 377: eadc8969-eadc8969

  • DOI: https://doi.org/10.1126/science.adc8969
  • Primary Citation of Related Structures:  
    7UWG, 7UXR, 7UXS, 7UXT, 7UXU

  • PubMed Abstract: 

    Cyclic adenosine diphosphate (ADP)-ribose (cADPR) isomers are signaling molecules produced by bacterial and plant Toll/interleukin-1 receptor (TIR) domains via nicotinamide adenine dinucleotide (oxidized form) (NAD + ) hydrolysis. We show that v-cADPR (2'cADPR) and v2-cADPR (3'cADPR) isomers are cyclized by O-glycosidic bond formation between the ribose moieties in ADPR. Structures of 2'cADPR-producing TIR domains reveal conformational changes that lead to an active assembly that resembles those of Toll-like receptor adaptor TIR domains. Mutagenesis reveals a conserved tryptophan that is essential for cyclization. We show that 3'cADPR is an activator of ThsA effector proteins from the bacterial antiphage defense system termed Thoeris and a suppressor of plant immunity when produced by the effector HopAM1. Collectively, our results reveal the molecular basis of cADPR isomer production and establish 3'cADPR in bacteria as an antiviral and plant immunity-suppressing signaling molecule.

  • Organizational Affiliation

    School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TIR domain protein
A, B
177Bacteroides thetaiotaomicronMutation(s): 0 
Gene Names: Btheta7330_00630DW011_11495DWY18_13615GAN93_22170SAMN02910322_04521
Find proteins for A0A0P0FGV9 (Bacteroides thetaiotaomicron)
Explore A0A0P0FGV9 
Go to UniProtKB:  A0A0P0FGV9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0P0FGV9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.42 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.69α = 90
b = 43.127β = 90.04
c = 98.757γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Australian Research Council (ARC)Australia--
National Health and Medical Research Council (NHMRC, Australia)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-07
    Type: Initial release
  • Version 1.1: 2022-09-14
    Changes: Database references
  • Version 1.2: 2022-10-12
    Changes: Database references
  • Version 1.3: 2023-10-18
    Changes: Data collection, Refinement description