6IFW

crystal structure of chimeric construct of KsgA with loop 1 from erm


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Deciphering Determinants in Ribosomal Methyltransferases That Confer Antimicrobial Resistance.

Bhujbalrao, R.Anand, R.

(2019) J. Am. Chem. Soc. 141: 1425-1429

  • DOI: 10.1021/jacs.8b10277
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Post-translational methylation of rRNA at select positions is a prevalent resistance mechanism adopted by pathogens. In this work, KsgA, a housekeeping ribosomal methyltransferase (rMtase) involved in ribosome biogenesis, was exploited as a model sys ...

    Post-translational methylation of rRNA at select positions is a prevalent resistance mechanism adopted by pathogens. In this work, KsgA, a housekeeping ribosomal methyltransferase (rMtase) involved in ribosome biogenesis, was exploited as a model system to delineate the specific targeting determinants that impart substrate specificity to rMtases. With a combination of evolutionary and structure-guided approaches, a set of chimeras were created that altered the targeting specificity of KsgA such that it acted similarly to erythromycin-resistant methyltransferases (Erms), rMtases found in multidrug-resistant pathogens. The results revealed that specific loop embellishments on the basic Rossmann fold are key determinants in the selection of the cognate RNA. Moreover, in vivo studies confirmed that chimeric constructs are competent in imparting macrolide resistance. This work explores the factors that govern the emergence of resistance and paves the way for the design of specific inhibitors useful in reversing antibiotic resistance.


    Organizational Affiliation

    Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribosomal RNA small subunit methyltransferase A
A, B
274Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: rsmA (ksgA)
EC: 2.1.1.182
Find proteins for P37468 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P37468
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.220α = 90.00
b = 81.000β = 90.00
c = 120.860γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
REFMACrefinement
Auto-Rickshawphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Department of Science & Technology (India)IndiaSERB/F/4395/2016-17
Other governmentIndia20150237B02RP00614-BRNS

Revision History 

  • Version 1.0: 2019-01-30
    Type: Initial release
  • Version 1.1: 2019-02-13
    Type: Data collection, Database references