5W1T

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.3 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:  

  • 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 Dks ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit alpha
A, B, G, H
329Escherichia 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
RpoZ
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
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
RNA polymerase-binding transcription factor DksA
M, N
151Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: dksA
Find proteins for P0ABS1 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ABS1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download SDF File 
Download CCD File 
D, J, M, N
ZINC ION
Zn
PTFCDOFLOPIGGS-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: 4.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 184.000α = 90.00
b = 204.894β = 90.00
c = 314.312γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PHENIXphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM087350

Revision History 

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