1BL0

MULTIPLE ANTIBIOTIC RESISTANCE PROTEIN (MARA)/DNA COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1BL0/pdb
• NAKB: 1BL0

• Classification: TRANSCRIPTION/DNA
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-07-22 Released: 1998-09-02 
• Deposition Author(s): Davies, S., Rhee, R.G., Martin, J.L., Rosner, D.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.303 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 

Literature

A novel DNA-binding motif in MarA: the first structure for an AraC family transcriptional activator.

Rhee, S., Martin, R.G., Rosner, J.L., Davies, D.R.

(1998) Proc Natl Acad Sci U S A 95: 10413-10418

• PubMed: 9724717 
• DOI: https://doi.org/10.1073/pnas.95.18.10413
• Primary Citation of Related Structures:  
  1BL0


• PubMed Abstract: 
  

  A crystal structure for a member of the AraC prokaryotic transcriptional activator family, MarA, in complex with its cognate DNA-binding site is described. MarA consists of two similar subdomains, each containing a helix-turn-helix DNA-binding motif. The two recognition helices of the motifs are inserted into adjacent major groove segments on the same face of the DNA but are separated by only 27 A thereby bending the DNA by approximately 35 degrees. Extensive interactions between the recognition helices and the DNA major groove provide the sequence specificity.

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Organizational Affiliation: 

Laboratory of Molecular Biology, National Institutes of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0560, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30.18 kDa 
• Atom Count: 2,096 
• Modelled Residue Count: 164 
• Deposited Residue Count: 177 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (MULTIPLE ANTIBIOTIC RESISTANCE PROTEIN)	C [auth A]	129	Escherichia coli	Mutation(s): 0  Gene Names: MARA
UniProt
Find proteins for P0ACH5 (Escherichia coli (strain K12)) Explore P0ACH5  Go to UniProtKB:  P0ACH5

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*GP*GP*GP*AP*TP*TP*TP*AP*GP*CP*AP*AP*AP*AP*CP*GP*TP*GP*GP*CP*AP* TP*C)-3')	A [auth B]	24	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*CP*CP*GP*AP*TP*GP*CP*CP*AP*CP*GP*TP*TP*TP*TP*GP*CP*TP*AP*AP*AP*TP* CP*C)-3')	B [auth C]	24	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.303 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.1	α = 90
b = 47.1	β = 90
c = 298.2	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-09-02 
Deposition Author(s): Davies, S., Rhee, R.G., Martin, J.L., Rosner, D.R.

Revision History  

• Version 1.0: 1998-09-02
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references