4ME7

Crystal structure of Bacillus subtilis toxin MazF in complex with cognate antitoxin MazE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.918 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Basis of mRNA Recognition and Cleavage by Toxin MazF and Its Regulation by Antitoxin MazE in Bacillus subtilis.

Simanshu, D.K.Yamaguchi, Y.Park, J.H.Inouye, M.Patel, D.J.

(2013) Mol.Cell 52: 447-458

  • DOI: 10.1016/j.molcel.2013.09.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • MazF is an mRNA interferase, which, upon activation during stress conditions, cleaves mRNAs in a sequence-specific manner, resulting in cellular growth arrest. During normal growth conditions, the MazF toxin is inactivated through binding to its cogn ...

    MazF is an mRNA interferase, which, upon activation during stress conditions, cleaves mRNAs in a sequence-specific manner, resulting in cellular growth arrest. During normal growth conditions, the MazF toxin is inactivated through binding to its cognate antitoxin, MazE. How MazF specifically recognizes its mRNA target and carries out cleavage and how the formation of the MazE-MazF complex inactivates MazF remain unclear. We present crystal structures of MazF in complex with mRNA substrate and antitoxin MazE in Bacillus subtilis. The structure of MazF in complex with uncleavable UUdUACAUAA RNA substrate defines the molecular basis underlying the sequence-specific recognition of UACAU and the role of residues involved in the cleavage through site-specific mutational studies. The structure of the heterohexameric (MazF)2-(MazE)2-(MazF)2 complex in Bacillus subtilis, supplemented by mutational data, demonstrates that the positioning of the C-terminal helical segment of MazE within the RNA-binding channel of the MazF dimer prevents mRNA binding and cleavage by MazF.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
mRNA interferase EndoA
A, B, C, D
116Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: ndoA (mazF, ydcE)
EC: 3.1.27.-
Find proteins for P96622 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P96622
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Antitoxin EndoAI
E, F
94Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: ndoAI (mazE)
Find proteins for P96621 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P96621
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.918 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.253 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 81.503α = 90.00
b = 91.618β = 90.00
c = 104.334γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
AutoSolphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-23
    Type: Initial release
  • Version 1.1: 2013-10-30
    Type: Database references
  • Version 1.2: 2013-11-27
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description