6CUU

Thermus thermophiles RNA polymerase in complex with promoter DNA and antibiotic Kanglemycin A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.99 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 

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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Mode of Action of Kanglemycin A, an Ansamycin Natural Product that Is Active against Rifampicin-Resistant Mycobacterium tuberculosis.

Mosaei, H.Molodtsov, V.Kepplinger, B.Harbottle, J.Moon, C.W.Jeeves, R.E.Ceccaroni, L.Shin, Y.Morton-Laing, S.Marrs, E.C.L.Wills, C.Clegg, W.Yuzenkova, Y.Perry, J.D.Bacon, J.Errington, J.Allenby, N.E.E.Hall, M.J.Murakami, K.S.Zenkin, N.

(2018) Mol Cell 72: 263-274.e5

  • DOI: https://doi.org/10.1016/j.molcel.2018.08.028
  • Primary Citation of Related Structures:  
    6CUU, 6CUX

  • PubMed Abstract: 

    Antibiotic-resistant bacterial pathogens pose an urgent healthcare threat, prompting a demand for new medicines. We report the mode of action of the natural ansamycin antibiotic kanglemycin A (KglA). KglA binds bacterial RNA polymerase at the rifampicin-binding pocket but maintains potency against RNA polymerases containing rifampicin-resistant mutations. KglA has antibiotic activity against rifampicin-resistant Gram-positive bacteria and multidrug-resistant Mycobacterium tuberculosis (MDR-M. tuberculosis). The X-ray crystal structures of KglA with the Escherichia coli RNA polymerase holoenzyme and Thermus thermophilus RNA polymerase-promoter complex reveal an altered-compared with rifampicin-conformation of KglA within the rifampicin-binding pocket. Unique deoxysugar and succinate ansa bridge substituents make additional contacts with a separate, hydrophobic pocket of RNA polymerase and preclude the formation of initial dinucleotides, respectively. Previous ansa-chain modifications in the rifamycin series have proven unsuccessful. Thus, KglA represents a key starting point for the development of a new class of ansa-chain derivatized ansamycins to tackle rifampicin resistance.


  • Organizational Affiliation

    Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne NE2 4AX, UK.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit alpha
A, B
315Thermus thermophilus HB27Mutation(s): 0 
Gene Names: rpoATT_C1300
EC: 2.7.7.6
UniProt
Find proteins for Q5SHR6 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
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UniProt GroupQ5SHR6
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit beta1,119Thermus thermophilus HB27Mutation(s): 0 
Gene Names: rpoBTT_C1461
EC: 2.7.7.6
UniProt
Find proteins for Q8RQE9 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
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UniProt GroupQ8RQE9
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit beta'1,524Thermus thermophilus HB27Mutation(s): 0 
Gene Names: rpoCTT_C1460
EC: 2.7.7.6
UniProt
Find proteins for Q8RQE8 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
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UniProt GroupQ8RQE8
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit omega99Thermus thermophilus HB27Mutation(s): 0 
Gene Names: rpoZTT_C1196
EC: 2.7.7.6
UniProt
Find proteins for Q8RQE7 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
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UniProt GroupQ8RQE7
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
RNA polymerase sigma factor SigA423Thermus thermophilus HB27Mutation(s): 0 
Gene Names: sigArpoDTT_C0164
UniProt
Find proteins for Q5SKW1 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
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Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (5'-D(P*TP*GP*CP*AP*TP*CP*AP*GP*AP*GP*CP*CP*CP*AP*AP*AP*A)-3')22Bacillus subtilis
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Entity ID: 7
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*CP*TP*CP*TP*GP*AP*TP*GP*CP*A)-3')27Bacillus subtilis
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.99 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 185.221α = 90
b = 101.315β = 98.89
c = 294.279γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom102851
Leverhulme TrustUnited KingdomPLP-2014-229
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM087350

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-25
    Type: Initial release
  • Version 1.1: 2018-10-03
    Changes: Data collection, Database references
  • Version 1.2: 2018-10-31
    Changes: Data collection, Database references
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.4: 2024-03-13
    Changes: Data collection, Database references