4ZH3

Crystal structure of Escherichia coli RNA polymerase in complex with CBRH16-Br


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.08 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 

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This is version 1.3 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:  
    4ZH2, 4ZH3, 4ZH4

  • 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 hopping from CBR hydroxamidines ...

    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

    Waksman Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA. Electronic address: ebright@waksman.rutgers.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit alphaABGH335Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoApezphssezb3295JW3257
EC: 2.7.7.6
Find proteins for P0A7Z4 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A7Z4
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit betaCI1342Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoBgroNnitBrifronstlstvtabDb3987JW3950
EC: 2.7.7.6
Find proteins for P0A8V2 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A8V2
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit beta'DJ1407Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoCtabBb3988JW3951
EC: 2.7.7.6
Find proteins for P0A8T7 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A8T7
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit omegaEK91Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoZb3649JW3624
EC: 2.7.7.6
Find proteins for P0A800 (Escherichia coli (strain K12))
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
RNA polymerase sigma factor RpoDFL613Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoDaltb3067JW3039
Find proteins for P00579 (Escherichia coli (strain K12))
Explore P00579 
Go to UniProtKB:  P00579
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Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.08 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 186.339α = 90
b = 205.79β = 90
c = 307.63γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PDB_EXTRACTdata extraction
HKL-3000data reduction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM041376

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-08-19
    Changes: Database references
  • Version 1.2: 2017-09-06
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2019-12-25
    Changes: Author supporting evidence