4ZH2

Crystal structure of Escherichia coli RNA polymerase in complex with CBR703


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.204 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of Transcription Inhibition by CBR Hydroxamidines and CBR Pyrazoles.

Feng, Y.Degen, D.Wang, X.Gigliotti, M.Liu, S.Zhang, Y.Das, D.Michalchuk, T.Ebright, Y.W.Talaue, M.Connell, N.Ebright, R.H.

(2015) Structure 23: 1470-1481

  • DOI: 10.1016/j.str.2015.06.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CBR hydroxamidines are small-molecule inhibitors of bacterial RNA polymerase (RNAP) discovered through high-throughput screening of synthetic-compound libraries. CBR pyrazoles are structurally related RNAP inhibitors discovered through scaffold hoppi ...

    CBR hydroxamidines are small-molecule inhibitors of bacterial RNA polymerase (RNAP) discovered through high-throughput screening of synthetic-compound libraries. CBR pyrazoles are structurally related RNAP inhibitors discovered through scaffold hopping from CBR hydroxamidines. CBR hydroxamidines and pyrazoles selectively inhibit Gram-negative bacterial RNAP and exhibit selective antibacterial activity against Gram-negative bacteria. Here, we report crystal structures of the prototype CBR hydroxamidine, CBR703, and a CBR pyrazole in complex with E. coli RNAP holoenzyme. In addition, we define the full resistance determinant for CBR703, show that the binding site and resistance determinant for CBR703 do not overlap the binding sites and resistance determinants of other characterized RNAP inhibitors, show that CBR703 exhibits no or minimal cross-resistance with other characterized RNAP inhibitors, and show that co-administration of CBR703 with other RNAP inhibitors results in additive antibacterial activities. The results set the stage for structure-based optimization of CBR inhibitors as antibacterial drugs.


    Organizational Affiliation

    Center for Biodefense, New Jersey Medical School, Rutgers University, Newark, NJ 07101, USA.,Waksman Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA. Electronic address: ebright@waksman.rutgers.edu.,Waksman Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit alpha
A, B, G, H
335Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpoA (pez, phs, sez)
EC: 2.7.7.6
Find proteins for P0A7Z4 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7Z4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit beta
C, I
1342Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpoB (groN, nitB, rif, ron, stl, stv, tabD)
EC: 2.7.7.6
Find proteins for P0A8V2 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A8V2
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit beta'
D, J
1407Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpoC (tabB)
EC: 2.7.7.6
Find proteins for P0A8T7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A8T7
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit omega
E, K
91Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpoZ
EC: 2.7.7.6
Find proteins for P0A800 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A800
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
RNA polymerase sigma factor RpoD
F, L
613Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpoD (alt)
Find proteins for P00579 (Escherichia coli (strain K12))
Go to UniProtKB:  P00579
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
D, J
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
4OB
Query on 4OB

Download SDF File 
Download CCD File 
C, I
N-hydroxy-N'-phenyl-3-(trifluoromethyl)benzenecarboximidamide
C14 H11 F3 N2 O
SFPWZRCGYUTPNJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
D, J
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.204 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.266 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 185.792α = 90.00
b = 205.829β = 90.00
c = 307.457γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing
PHENIXrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM041376

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-08-19
    Type: Database references
  • Version 1.2: 2017-09-06
    Type: Author supporting evidence, Database references, Derived calculations