6BNF

Crystal structure of the intrinsic colistin resistance enzyme ICR(Mc) from Moraxella catarrhalis, catalytic domain, mono-zinc complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Substrate recognition by a colistin resistance enzyme from Moraxella catarrhalis.

Stogios, P.J., Cox, G., Zubyk, H.L., Evdokimova, E., Wawrzak, Z., Wright, G.D., Savchenko, A.

(2018) ACS Chem Biol 

  • DOI: 10.1021/acschembio.8b00116
  • Primary Citation of Related Structures:  
    6BNC, 6BNE, 6BND, 6BNF

  • PubMed Abstract: 

    • Lipid A phosphoethanolamine (PEtN) transferases render bacteria resistant to the last resort antibiotic colistin. The recent discoveries of pathogenic bacteria harboring plasmid-borne PEtN transferase ( mcr) genes have illustrated the serious potential for wide dissemination of these resistance elements ...

    Lipid A phosphoethanolamine (PEtN) transferases render bacteria resistant to the last resort antibiotic colistin. The recent discoveries of pathogenic bacteria harboring plasmid-borne PEtN transferase ( mcr) genes have illustrated the serious potential for wide dissemination of these resistance elements. The origin of mcr-1 is traced to Moraxella species co-occupying environmental niches with Enterobacteriaceae. Here, we describe the crystal structure of the catalytic domain of the chromosomally encoded colistin resistance PEtN transferase, ICR Mc (for intrinsic colistin resistance) of Moraxella catarrhalis. The ICR Mc structure in complex with PEtN reveals key molecular details including specific residues involved in catalysis and PEtN binding. It also demonstrates that ICR Mc catalytic domain dimerization is required for substrate binding. Our structure-guided phylogenetic analysis provides sequence signatures defining potentially colistin-active representatives in this enzyme family. Combined, these results advance the molecular and mechanistic understanding of PEtN transferases and illuminate their origins.

    Organizational Affiliation: 

    Department of Microbiology, Immunology and Infectious Diseases, Health Research Innovation Centre , University of Calgary , 3330 Hospital Drive NW, HRIC-2C66 , Calgary , Alberta T2N 4N1 , Canada.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phosphoethanolamine transferaseA344Moraxella sp. HMSC061H09Mutation(s): 0 
Gene Names: HMPREF2573_04170
Find proteins for A0A1E9VP98 (Moraxella sp. HMSC061H09)
Explore A0A1E9VP98 
Go to UniProtKB:  A0A1E9VP98
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
PO4
Query on PO4
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K		 Ligand Interaction
GOL
Query on GOL
Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
ACT
Query on ACT
Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 148.272α = 90
b = 148.272β = 90
c = 148.272γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHENIXphasing
PHENIXmodel building
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesHHSCN272201200026C
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesHHSN272201700060C

Revision History 

  • Version 1.0: 2018-01-31
    Type: Initial release
  • Version 1.1: 2018-02-14
    Changes: Author supporting evidence
  • Version 1.2: 2018-04-25
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-11
    Changes: Author supporting evidence