5W1T

X-ray crystal structure of Escherichia coli RNA polymerase and DksA complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Allosteric Effector ppGpp Potentiates the Inhibition of Transcript Initiation by DksA.

Molodtsov, V.Sineva, E.Zhang, L.Huang, X.Cashel, M.Ades, S.E.Murakami, K.S.

(2018) Mol Cell 69: 828-839.e5

  • DOI: 10.1016/j.molcel.2018.01.035
  • Primary Citation of Related Structures:  
    5VSW, 5W1S, 5W1T

  • PubMed Abstract: 
  • DksA and ppGpp are the central players in the stringent response and mediate a complete reprogramming of the transcriptome. A major component of the response is a reduction in ribosome synthesis, which is accomplished by the synergistic action of DksA and ppGpp bound to RNA polymerase (RNAP) inhibiting transcription of rRNAs ...

    DksA and ppGpp are the central players in the stringent response and mediate a complete reprogramming of the transcriptome. A major component of the response is a reduction in ribosome synthesis, which is accomplished by the synergistic action of DksA and ppGpp bound to RNA polymerase (RNAP) inhibiting transcription of rRNAs. Here, we report the X-ray crystal structures of Escherichia coli RNAP in complex with DksA alone and with ppGpp. The structures show that DksA accesses the template strand at the active site and the downstream DNA binding site of RNAP simultaneously and reveal that binding of the allosteric effector ppGpp reshapes the RNAP-DksA complex. The structural data support a model for transcriptional inhibition in which ppGpp potentiates the destabilization of open complexes by DksA. This work establishes a structural basis for understanding the pleiotropic effects of DksA and ppGpp on transcriptional regulation in proteobacteria.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, The Center for RNA Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA. Electronic address: kum14@psu.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit alphaA, B, G, H329Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoApezphssezb3295JW3257
EC: 2.7.7.6
UniProt
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 betaC, I1342Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoBgroNnitBrifronstlstvtabDb3987JW3950
EC: 2.7.7.6
UniProt
Find proteins for P0A8V2 (Escherichia coli (strain K12))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit beta'D, J1407Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoCtabBb3988JW3951
EC: 2.7.7.6
UniProt
Find proteins for P0A8T7 (Escherichia coli (strain K12))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
RpoZE, K91Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoZb3649JW3624
EC: 2.7.7.6
UniProt
Find proteins for P0A800 (Escherichia coli (strain K12))
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
RNA polymerase sigma factor RpoDF, L613Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoDaltb3067JW3039
UniProt
Find proteins for P00579 (Escherichia coli (strain K12))
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
RNA polymerase-binding transcription factor DksAM, N151Escherichia coli K-12Mutation(s): 0 
Gene Names: dksAb0145JW0141
UniProt
Find proteins for P0ABS1 (Escherichia coli (strain K12))
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 184α = 90
b = 204.894β = 90
c = 314.312γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
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 StatesGM087350

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence
  • Version 1.2: 2018-02-07
    Changes: Database references
  • Version 1.3: 2018-03-14
    Changes: Database references
  • Version 1.4: 2020-01-01
    Changes: Author supporting evidence