6DQL

Crystal structure of Regulator of Proteinase B RopB complexed with SIP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.235 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Environmental pH and peptide signaling control virulence of Streptococcus pyogenes via a quorum-sensing pathway.

Do, H.Makthal, N.VanderWal, A.R.Saavedra, M.O.Olsen, R.J.Musser, J.M.Kumaraswami, M.

(2019) Nat Commun 10: 2586-2586

  • DOI: 10.1038/s41467-019-10556-8
  • Primary Citation of Related Structures:  
    6DQL

  • PubMed Abstract: 
  • Bacteria control gene expression in concert with their population density by a process called quorum sensing, which is modulated by bacterial chemical signals and environmental factors. In the human pathogen Streptococcus pyogenes, production of secreted virulence factor SpeB is controlled by a quorum-sensing pathway and environmental pH ...

    Bacteria control gene expression in concert with their population density by a process called quorum sensing, which is modulated by bacterial chemical signals and environmental factors. In the human pathogen Streptococcus pyogenes, production of secreted virulence factor SpeB is controlled by a quorum-sensing pathway and environmental pH. The quorum-sensing pathway consists of a secreted leaderless peptide signal (SIP), and its cognate receptor RopB. Here, we report that the SIP quorum-sensing pathway has a pH-sensing mechanism operative through a pH-sensitive histidine switch located at the base of the SIP-binding pocket of RopB. Environmental acidification induces protonation of His144 and reorganization of hydrogen bonding networks in RopB, which facilitates SIP recognition. The convergence of two disparate signals in the SIP signaling pathway results in induction of SpeB production and increased bacterial virulence. Our findings provide a model for investigating analogous crosstalk in other microorganisms.


    Organizational Affiliation

    Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, 77030, USA. mkumaraswami@houstonmethodist.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Regulator of Proteinase B RopBA, B233Streptococcus pyogenesMutation(s): 0 
Gene Names: rgg
UniProt
Find proteins for D3KVD8 (Streptococcus pyogenes)
Explore D3KVD8 
Go to UniProtKB:  D3KVD8
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SpeB-inducing peptide (SIP)C8Streptococcus pyogenesMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.235 
  • Space Group: P 32 1 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.211α = 90
b = 94.211β = 90
c = 179.957γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States1R01AI109096-01A1

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Author supporting evidence, Database references