3GXQ

Structure of ArtA and DNA complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Staphylococcus aureus pSK41 plasmid-encoded ArtA protein is a master regulator of plasmid transmission genes and contains a RHH motif used in alternate DNA-binding modes.

Ni, L.Jensen, S.O.Ky Tonthat, N.Berg, T.Kwong, S.M.Guan, F.H.Brown, M.H.Skurray, R.A.Firth, N.Schumacher, M.A.

(2009) Nucleic Acids Res. 37: 6970-6983

  • DOI: 10.1093/nar/gkp756

  • PubMed Abstract: 
  • Plasmids harbored by Staphylococcus aureus are a major contributor to the spread of bacterial multi-drug resistance. Plasmid conjugation and partition are critical to the dissemination and inheritance of such plasmids. Here, we demonstrate that the A ...

    Plasmids harbored by Staphylococcus aureus are a major contributor to the spread of bacterial multi-drug resistance. Plasmid conjugation and partition are critical to the dissemination and inheritance of such plasmids. Here, we demonstrate that the ArtA protein encoded by the S. aureus multi-resistance plasmid pSK41 is a global transcriptional regulator of pSK41 genes, including those involved in conjugation and segregation. ArtA shows no sequence homology to any structurally characterized DNA-binding protein. To elucidate the mechanism by which it specifically recognizes its DNA site, we obtained the structure of ArtA bound to its cognate operator, ACATGACATG. The structure reveals that ArtA is representative of a new family of ribbon-helix-helix (RHH) DNA-binding proteins that contain extended, N-terminal basic motifs. Strikingly, unlike most well-studied RHH proteins ArtA binds its cognate operators as a dimer. However, we demonstrate that it is also able to recognize an atypical operator site by binding as a dimer-of-dimers and the extended N-terminal regions of ArtA were shown to be essential for this dimer-of-dimer binding mode. Thus, these data indicate that ArtA is a master regulator of genes critical for both horizontal and vertical transmission of pSK41 and that it can recognize DNA utilizing alternate binding modes.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Texas, MD Anderson Cancer Center, Unit 1000, Houston, TX 77030, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative regulator of transfer genes ArtA
A, B
54Staphylococcus aureus (strain USA300)Mutation(s): 0 
Find proteins for A0A0H2XIU6 (Staphylococcus aureus (strain USA300))
Go to UniProtKB:  A0A0H2XIU6
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*CP*AP*TP*GP*AP*CP*AP*TP*G)-3')C10N/A
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*CP*AP*TP*GP*TP*CP*AP*TP*GP*T)-3')D11N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 37.830α = 90.00
b = 61.130β = 117.32
c = 40.500γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
Blu-Icedata collection
SOLVEphasing
SCALAdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description