1P6R | pdb_00001p6r

Solution structure of the DNA binding domain of the repressor BlaI.

• PDB DOI: https://doi.org/10.2210/pdb1P6R/pdb
• BMRB: 5873

• Classification: TRANSCRIPTION
• Organism(s): Bacillus licheniformis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-04-30 Released: 2003-12-09 
• Deposition Author(s): Melckebeke, H.V., Vreuls, C., Gans, P., Llabres, G., Filee, P., Joris, B., Simorre, J.P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 19 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structural study of BlaI: implications for the repression of genes involved in beta-lactam antibiotic resistance.

Melckebeke, H.V., Vreuls, C., Gans, P., Llabres, G., Joris, B., Simorre, J.P.

(2003) J Mol Biology 333: 711-720

• PubMed: 14568532 
• DOI: https://doi.org/10.1016/j.jmb.2003.09.005
• Primary Citation Related Structures: 
  1P6R


• PubMed Abstract: 
  

  beta-Lactamase and penicillin-binding protein PBP2' mediate staphylococcal resistance to beta-lactam antibiotics, which are otherwise highly clinically effective. Two repressors (BlaI and MecI) regulate expression of these inducible proteins. Here, we present the first solution structure of the 82 amino acid residue DNA-binding domain of Bacillus licheniformis BlaI which is very similar in primary sequence to the medically significant Staphyloccocal BlaI and MecI proteins. This structure is composed of a compact core of three alpha-helices and a three-stranded beta-sheet typical of the winged helix protein (WHP) family. The protein/DNA complex was studied by NMR chemical shift comparison between the free and complexed forms of BlaI. Residues involved in DNA interaction were identified and a WHP canonical model of interaction with the operators is proposed. In this model, specific contacts occur between the base-pairs of the TACA motif and conserved amino acid residues of the repressor helix H3. These results help toward understanding the repression and induction mechanism of the genes coding for beta-lactamase and PBP2'.

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Organizational Affiliation: 
• Institut de Biologie Structurale-Jean-Pierre Ebel, CEA-CNRS-UJF, 41 Avenue Jules Horowitz, 38027, Grenoble Cedex 1, France.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 9.51 kDa 
• Atom Count: 667 
• Modeled Residue Count: 82 
• Deposited Residue Count: 82 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Penicillinase repressor	A	82	Bacillus licheniformis	Mutation(s): 0  Gene Names: BLAI OR PENI
UniProt
Find proteins for P06555 (Bacillus licheniformis) Explore P06555  Go to UniProtKB:  P06555

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 19 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-12-09 
Deposition Author(s): Melckebeke, H.V., Vreuls, C., Gans, P., Llabres, G., Filee, P., Joris, B., Simorre, J.P.

Revision History  

• Version 1.0: 2003-12-09
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-23
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-05-22
  Changes: Data collection