5CXL

CRYSTAL STRUCTURE OF RTX DOMAIN BLOCK V OF ADENYLATE CYCLASE TOXIN FROM BORDETELLA PERTUSSIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.148 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Calcium-Driven Folding of RTX Domain beta-Rolls Ratchets Translocation of RTX Proteins through Type I Secretion Ducts.

Bumba, L.Masin, J.Macek, P.Wald, T.Motlova, L.Bibova, I.Klimova, N.Bednarova, L.Veverka, V.Kachala, M.Svergun, D.I.Barinka, C.Sebo, P.

(2016) Mol.Cell 62: 47-62

  • DOI: 10.1016/j.molcel.2016.03.018
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Calcium-binding RTX proteins are equipped with C-terminal secretion signals and translocate from the Ca(2+)-depleted cytosol of Gram-negative bacteria directly into the Ca(2+)-rich external milieu, passing through the "channel-tunnel" ducts of type I ...

    Calcium-binding RTX proteins are equipped with C-terminal secretion signals and translocate from the Ca(2+)-depleted cytosol of Gram-negative bacteria directly into the Ca(2+)-rich external milieu, passing through the "channel-tunnel" ducts of type I secretion systems (T1SSs). Using Bordetella pertussis adenylate cyclase toxin, we solved the structure of an essential C-terminal assembly that caps the RTX domains of RTX family leukotoxins. This is shown to scaffold directional Ca(2+)-dependent folding of the carboxy-proximal RTX repeat blocks into β-rolls. The resulting intramolecular Brownian ratchets then prevent backsliding of translocating RTX proteins in the T1SS conduits and thereby accelerate excretion of very large RTX leukotoxins from bacterial cells by a vectorial "push-ratchet" mechanism. Successive Ca(2+)-dependent and cosecretional acquisition of a functional RTX toxin structure in the course of T1SS-mediated translocation, through RTX domain folding from the C-terminal cap toward the N terminus, sets a paradigm that opens for design of virulence inhibitors of major pathogens.


    Organizational Affiliation

    Institute of Microbiology, ASCR, v.v.i., Videnska 1083, 14220 Prague, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bifunctional hemolysin/adenylate cyclase
A, B
153Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251)Mutation(s): 0 
Gene Names: cya (cyaA)
Find proteins for P0DKX7 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Go to UniProtKB:  P0DKX7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NO3
Query on NO3

Download SDF File 
Download CCD File 
A, B
NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.148 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 52.225α = 90.00
b = 52.225β = 90.00
c = 195.952γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Grant Agency of the Czech RepublicCzech RepublicGA15-11851S
Charles University Grant AgencyCzech Republic353388

Revision History 

  • Version 1.0: 2015-09-02
    Type: Initial release
  • Version 1.1: 2016-04-20
    Type: Database references