6RCK

Crystal structure of the OmpK36 GD insertion chimera from Klebsiella pneumonia


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.0 of the entry. See complete history


Literature

OmpK36-mediated Carbapenem resistance attenuates ST258 Klebsiella pneumoniae in vivo.

Wong, J.L.C.Romano, M.Kerry, L.E.Kwong, H.S.Low, W.W.Brett, S.J.Clements, A.Beis, K.Frankel, G.

(2019) Nat Commun 10: 3957-3957

  • DOI: 10.1038/s41467-019-11756-y
  • Primary Citation of Related Structures:  
    6RCK, 6RCP, 6RD3

  • PubMed Abstract: 
  • Carbapenem-resistance in Klebsiella pneumoniae (KP) sequence type ST258 is mediated by carbapenemases (e.g. KPC-2) and loss or modification of the major non-selective porins OmpK35 and OmpK36. However, the mechanism underpinning OmpK36-mediated resistance and consequences of these changes on pathogenicity remain unknown ...

    Carbapenem-resistance in Klebsiella pneumoniae (KP) sequence type ST258 is mediated by carbapenemases (e.g. KPC-2) and loss or modification of the major non-selective porins OmpK35 and OmpK36. However, the mechanism underpinning OmpK36-mediated resistance and consequences of these changes on pathogenicity remain unknown. By solving the crystal structure of a clinical ST258 OmpK36 variant we provide direct structural evidence of pore constriction, mediated by a di-amino acid (Gly115-Asp116) insertion into loop 3, restricting diffusion of both nutrients (e.g. lactose) and Carbapenems. In the presence of KPC-2 this results in a 16-fold increase in MIC to Meropenem. Additionally, the Gly-Asp insertion impairs bacterial growth in lactose-containing medium and confers a significant in vivo fitness cost in a murine model of ventilator-associated pneumonia. Our data suggests that the continuous selective pressure imposed by widespread Carbapenem utilisation in hospital settings drives the expansion of KP expressing Gly-Asp insertion mutants, despite an associated fitness cost.


    Organizational Affiliation

    Department of Life Sciences, Imperial College London, London, UK. g.frankel@imperial.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
OmpK36A, B, C347Klebsiella pneumoniaeMutation(s): 0 
Gene Names: ompK36ompC_2DDJ63_09115NCTC13443_05288
Membrane Entity: Yes 
UniProt
Find proteins for D6QLY1 (Klebsiella pneumoniae)
Explore D6QLY1 
Go to UniProtKB:  D6QLY1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD6QLY1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P6L
Query on P6L

Download Ideal Coordinates CCD File 
M [auth C](2S)-3-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-2-[(6E)-HEXADEC-6-ENOYLOXY]PROPYL (8E)-OCTADEC-8-ENOATE
C40 H75 O10 P
WLVNRDXLPAAELE-GDRYEXQRSA-N
 Ligand Interaction
C8E
Query on C8E

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A],
G [auth A],
I [auth B],
J [auth B],
E [auth A],
F [auth A],
G [auth A],
I [auth B],
J [auth B],
K [auth B],
N [auth C],
O [auth C]
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
 Ligand Interaction
LDA
Query on LDA

Download Ideal Coordinates CCD File 
D [auth A],
H [auth B],
L [auth C]
LAURYL DIMETHYLAMINE-N-OXIDE
C14 H31 N O
SYELZBGXAIXKHU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 232.458α = 90
b = 74.412β = 111.73
c = 90.112γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-11
    Type: Initial release