1R8D

Crystal Structure of MtaN Bound to DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structural mechanism for transcription activation by MerR family member multidrug transporter activation, N terminus.

Newberry, K.J.Brennan, R.G.

(2004) J.Biol.Chem. 279: 20356-20362

  • DOI: 10.1074/jbc.M400960200
  • Primary Citation of Related Structures:  1R8E

  • PubMed Abstract: 
  • Transcription regulators of the MerR family respond to myriad stress signals to activate sigma70/sigmaA-targeted genes, which contain suboptimal 19-bp spacers between their -35 and -10 promoter elements. The crystal structure of a BmrR-TPP(+)-DNA com ...

    Transcription regulators of the MerR family respond to myriad stress signals to activate sigma70/sigmaA-targeted genes, which contain suboptimal 19-bp spacers between their -35 and -10 promoter elements. The crystal structure of a BmrR-TPP(+)-DNA complex provided initial insight into the transcription activation mechanism of the MerR family, which involves base pair distortion, DNA undertwisting and shortening of the spacer, and realignment of the -35 and -10 boxes. Here, we describe the crystal structure of MerR family member MtaN bound to the mta promoter. Although the global DNA binding modes of MtaN and BmrR differ somewhat, homologous protein-DNA interactions are maintained. Moreover, despite their different sequences, the mta promoter conformation is essentially identical to that of the BmrR-TPP(+)-bound bmr promoter, indicating that this DNA distortion mechanism is common to the entire MerR family. Interestingly, DNA binding experiments reveal that the identity of the two central bases of the mta and bmr promoters, which are conserved as either a thymidine or an adenine in nearly all MerR promoters, is not important for DNA affinity. Comparison of the free and DNA-bound MtaN structures reveals that a conformational hinge, centered at residues N-terminal to the ubiquitous coiled coil, is key for mta promoter binding. Analysis of the structures of BmrR, CueR, and ZntR indicates that this hinge may be common to all MerR family members.


    Related Citations: 
    • Crystal structure of MtaN, a global multidrug transporter gene activator
      Godsey, M.H.,Baranova, N.N.,Neyfakh, A.A.,Brennan, R.G.
      (2001) J.Biol.Chem. 276: 47178


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oregon Health & Science University, Portland, OR 97239-3098, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
transcription activator MtaN
A, B
109Bacillus subtilis (strain 168)Gene Names: mta (ywnD)
Find proteins for P71039 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P71039
Entity ID: 1
MoleculeChainsLengthOrganism
26-MERC26N/A
Entity ID: 2
MoleculeChainsLengthOrganism
26-MERD26N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.234 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 148.190α = 90.00
b = 148.190β = 90.00
c = 73.360γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SOLVEphasing
CCP4data scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-08-17
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance