Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.73 kDa 
• Atom Count: 1029 
• Residue Count: 131 
• Unique protein chains: 1

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

• DOI: 10.2210/pdb2KZ8/pdb

• Classification: TRANSCRIPTION
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-06-14 Released: 2011-06-29 
• Deposition Author(s): Papadopoulos, E., Vlamis-Gardikas, A., Graslund, A., Billeter, M., Holmgren, A., Collet, J.

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Experimental Data Snapshot

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

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 

• PubMed: 22789559 
• 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 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).

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Uncharacterized HTH-type transcriptional regulator ygiT	A	131	Escherichia coli K-12	Mutation(s): 0  Gene Names: ygiT, b3021, JW2989, mqsA
Find proteins for Q46864 (Escherichia coli (strain K12)) Explore Q46864  Go to UniProtKB:  Q46864

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

Entry History 

Deposition Data

• Deposited Date: 2010-06-14 
• Released Date: 2011-06-29 
Deposition Author(s): Papadopoulos, E., Vlamis-Gardikas, A., Graslund, A., Billeter, M., Holmgren, A., Collet, J.

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