2KZ8

Solution NMR structure of MqsA, a protein from E. coli, containing a Zinc finger, N-terminal and a Helix Turn-Helix C-terminal domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with acceptable covalent geometry 

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This is version 1.3 of the entry. See complete history


Literature

Solution structure and biophysical properties of MqsA, a Zn-containing antitoxin from Escherichia coli

Papadopoulos, E.Collet, J.F.Vukojevic, V.Billeter, M.Holmgren, A.Graslund, A.Vlamis-Gardikas, A.

(2012) Biochim Biophys Acta 

  • DOI: 10.1016/j.bbapap.2012.06.016
  • Primary Citation of Related Structures:  
    2KZ8

  • PubMed Abstract: 
  • The gene ygiT (mqsA) of Escherichia coli encodes MqsA, the antitoxin of the motility quorum sensing regulator (MqsR). Both proteins are considered to form a DNA binding complex and to be involved in the formation of biofilms and persisters. We have d ...

    The gene ygiT (mqsA) of Escherichia coli encodes MqsA, the antitoxin of the motility quorum sensing regulator (MqsR). Both proteins are considered to form a DNA binding complex and to be involved in the formation of biofilms and persisters. We have determined the three-dimensional solution structure of MqsA by high-resolution NMR. The protein comprises a well-defined N-terminal domain with a Zn finger motif usually found in eukaryotes, and a defined C-terminal domain with a typical prokaryotic DNA binding helix-turn-helix motif. The two well-defined domains of MqsA have almost identical structure in solution and in the two published crystal structures of dimeric MqsA bound to either MqsR or DNA. However, the connection of the two domains with a flexible linker yields a large variety of possible conformations in solution, which is not reflected in the crystal structures. MqsA binds Zn with all four cysteines, a stoichiometry of 1:1 and a femtomolar affinity (K(a)≥ 10¹⁷M⁻¹ at 23°C, pH 7.0).


    Organizational Affiliation

    Department of Biochemistry & Biophysics, The Arrhenius Laboratories, Stockholm University, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Uncharacterized HTH-type transcriptional regulator ygiTA131Escherichia coli K-12Mutation(s): 0 
Gene Names: ygiTb3021JW2989mqsA
Find proteins for Q46864 (Escherichia coli (strain K12))
Explore Q46864 
Go to UniProtKB:  Q46864
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with acceptable covalent geometry 
  • OLDERADO: 2KZ8 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-04-04
    Changes: Structure summary
  • Version 1.3: 2012-07-25
    Changes: Database references