5UXA

Crystal structure of macrolide 2'-phosphotransferase MphB from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.151 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

The evolution of substrate discrimination in macrolide antibiotic resistance enzymes.

Pawlowski, A.C.Stogios, P.J.Koteva, K.Skarina, T.Evdokimova, E.Savchenko, A.Wright, G.D.

(2018) Nat Commun 9: 112-112

  • DOI: 10.1038/s41467-017-02680-0
  • Primary Citation of Related Structures:  5UXB, 5UXC, 5UXD

  • PubMed Abstract: 
  • The production of antibiotics by microbes in the environment and their use in medicine and agriculture select for existing and emerging resistance. To address this inevitability, prudent development of antibiotic drugs requires careful consideration ...

    The production of antibiotics by microbes in the environment and their use in medicine and agriculture select for existing and emerging resistance. To address this inevitability, prudent development of antibiotic drugs requires careful consideration of resistance evolution. Here, we identify the molecular basis for expanded substrate specificity in MphI, a macrolide kinase (Mph) that does not confer resistance to erythromycin, in contrast to other known Mphs. Using a combination of phylogenetics, drug-resistance phenotypes, and in vitro enzyme assays, we find that MphI and MphK phosphorylate erythromycin poorly resulting in an antibiotic-sensitive phenotype. Using likelihood reconstruction of ancestral sequences and site-saturation combinatorial mutagenesis, supported by Mph crystal structures, we determine that two non-obvious mutations in combination expand the substrate range. This approach should be applicable for studying the functional evolution of any antibiotic resistance enzyme and for evaluating the evolvability of resistance enzymes to new generations of antibiotic scaffolds.


    Organizational Affiliation

    Michael G. DeGroote Institute for Infectious Disease Research and the Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, L8S 4L8, ON, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Macrolide 2'-phosphotransferase II
A
302Escherichia coliGene Names: mphB
Find proteins for O32553 (Escherichia coli)
Go to UniProtKB:  O32553
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 67.276α = 90.00
b = 116.684β = 90.00
c = 92.574γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
HKL-3000data reduction
HKL-3000data scaling
PHENIXrefinement
PHENIXphasing
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesHHSCN27220120026C

Revision History 

  • Version 1.0: 2017-06-28
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence
  • Version 1.2: 2018-01-31
    Type: Experimental preparation
  • Version 2.0: 2018-02-21
    Type: Database references, Polymer sequence