7SKY

Pertussis toxin S1 bound to NAD+


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.37 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Crystal structures of pertussis toxin with NAD + and analogs provide structural insights into the mechanism of its cytosolic ADP-ribosylation activity.

Sakari, M.Tran, M.T.Rossjohn, J.Pulliainen, A.T.Beddoe, T.Littler, D.R.

(2022) J Biol Chem 298: 101892-101892

  • DOI: https://doi.org/10.1016/j.jbc.2022.101892
  • Primary Citation of Related Structures:  
    7SKI, 7SKK, 7SKY, 7SNE, 7U6Z

  • PubMed Abstract: 

    Bordetella pertussis is the causative agent of whooping cough, a highly contagious respiratory disease. Pertussis toxin (PT), a major virulence factor secreted by B. pertussis, is an AB5-type protein complex topologically related to cholera toxin. The PT protein complex is internalized by host cells and follows a retrograde trafficking route to the endoplasmic reticulum, where it subsequently dissociates. The released enzymatic S1 subunit is then translocated from the endoplasmic reticulum into the cytosol and subsequently ADP-ribosylates the inhibitory alpha-subunits (Gαi) of heterotrimeric G proteins, thus promoting dysregulation of G protein-coupled receptor signaling. However, the mechanistic details of the ADP-ribosylation activity of PT are not well understood. Here, we describe crystal structures of the S1 subunit in complex with nicotinamide adenine dinucleotide (NAD+), with NAD+ hydrolysis products ADP-ribose and nicotinamide, with NAD+ analog PJ34, and with a novel NAD+ analog formed upon S1 subunit crystallization with 3-amino benzamide and NAD+, which we name benzamide amino adenine dinucleotide. These crystal structures provide unprecedented insights into pre- and post-NAD+ hydrolysis steps of the ADP-ribosyltransferase activity of PT. We propose that these data may aid in rational drug design approaches and further development of PT-specific small-molecule inhibitors.


  • Organizational Affiliation

    Institute of Biomedicine, Research Unit for Infection and Immunity, University of Turku, Turku, Finland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pertussis toxin subunit 1A [auth B],
B [auth A],
C,
D
184Bordetella pertussisMutation(s): 1 
Gene Names: ptxABP3783
EC: 2.4.2 (PDB Primary Data), 2.4.2.30 (PDB Primary Data)
UniProt
Find proteins for P04977 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Explore P04977 
Go to UniProtKB:  P04977
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04977
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.37 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.6α = 90.73
b = 68.25β = 90.27
c = 71.67γ = 91.45
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-13
    Type: Initial release
  • Version 1.1: 2022-04-20
    Changes: Database references
  • Version 1.2: 2022-05-18
    Changes: Database references
  • Version 1.3: 2023-10-18
    Changes: Data collection, Refinement description