6BYU

X-ray crystal structure of Escherichia coli RNA polymerase (RpoB-H526Y) and ppApp complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 

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This is version 2.1 of the entry. See complete history. 


Literature

Structure-function comparisons of (p)ppApp vs (p)ppGpp for Escherichia coli RNA polymerase binding sites and for rrnB P1 promoter regulatory responses in vitro.

Bruhn-Olszewska, B., Molodtsov, V., Sobala, M., Dylewski, M., Murakami, K.S., Cashel, M., Potrykus, K.

(2018) Biochim Biophys Acta 1861: 731-742

  • DOI: 10.1016/j.bbagrm.2018.07.005
  • Primary Citation of Related Structures:  
    6BYU

  • PubMed Abstract: 

    • Precise regulation of gene expression is crucial for bacteria to respond to changing environmental conditions. In addition to protein factors affecting RNA polymerase (RNAP) activity, second messengers play an important role in transcription regulation, such as well-known effectors of the stringent response: guanosine 5'triphosphate-3'diphosphate and guanosine 3', 5'-bis(diphosphate) [(p)ppGpp] ...

    Precise regulation of gene expression is crucial for bacteria to respond to changing environmental conditions. In addition to protein factors affecting RNA polymerase (RNAP) activity, second messengers play an important role in transcription regulation, such as well-known effectors of the stringent response: guanosine 5'triphosphate-3'diphosphate and guanosine 3', 5'-bis(diphosphate) [(p)ppGpp]. Although much is known about importance of the 5' and 3' moieties of (p)ppGpp, the role of the guanine base remains somewhat cryptic. Here, we use (p)ppGpp's adenine analogs [(p)ppApp] to investigate how the nucleobase contributes to determine its binding site and transcriptional regulation. We determined X-ray crystal structure of Escherichia coli RNAP-(p)ppApp complex, which shows the analogs bind near the active site and switch regions of RNAP. We have also explored the regulatory effects of (p)ppApp on transcription initiating from the well-studied E. coli rrnB P1 promoter to assess and compare properties of (p)ppApp with (p)ppGpp. We demonstrate that contrary to (p)ppGpp, (p)ppApp activates transcription at this promoter and DksA hinders this effect. Moreover, pppApp exerts a stronger effect than ppApp. We also show that when ppGpp and pppApp are present together, the outcome depends on which one of them was pre-incubated with RNAP first. This behavior suggests a surprising Yin-Yang like reciprocal plasticity of RNAP responses at a single promoter, occasioned simply by pre-exposure to one or the other nucleotide. Our observations underscore the importance of the (p)ppNpp's purine nucleobase for interactions with RNAP, which may lead to a better fundamental understanding of (p)ppGpp regulation of RNAP activity.

    Organizational Affiliation: 

    Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland. Electronic address: katarzyna.potrykus@biol.ug.edu.pl.



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: rpoA, pez, phs, sez, b3295, JW3257
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 betaC, I1342Escherichia coli K-12Mutation(s): 1 
Gene Names: rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950
EC: 2.7.7.6
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: rpoC, tabB, b3988, JW3951
EC: 2.7.7.6
Find proteins for P0A8T7 (Escherichia coli (strain K12))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit omegaE, K91Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoZ, b3649, JW3624
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 RpoDF, L613Escherichia coli K-12Mutation(s): 0 
Gene Names: rpoD, alt, b3067, JW3039
Find proteins for P00579 (Escherichia coli (strain K12))
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ECJ
Query on ECJ
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C, I
(5R)-5-(6-amino-9H-purin-9-yl)-2-({[(S)-hydroxy(phosphonooxy)phosphoryl]oxy}methyl)-4-oxo-4,5-dihydrofuran-3-yl trihydrogen diphosphate
C10 H13 N5 O16 P4
CDOGMROMDFBAJR-SNVBAGLBSA-N		 Ligand Interaction
ZN
Query on ZN
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D, J
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
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D, J
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 186.254α = 90
b = 203.656β = 90
c = 308.322γ = 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 

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-02-14
    Changes: Author supporting evidence
  • Version 1.2: 2018-08-01
    Changes: Data collection, Database references
  • Version 1.3: 2018-08-15
    Changes: Data collection, Source and taxonomy, Structure summary
  • Version 2.0: 2018-08-29
    Changes: Atomic model, Data collection, Derived calculations, Source and taxonomy, Structure summary
  • Version 2.1: 2020-01-01
    Changes: Author supporting evidence