6RD3

Crystal structure of the wild type OmpK36 from Klebsiella pneumonia


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 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: https://doi.org/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. 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

    Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Imperial College London, London, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
OmpK36
A, B, C, D, E
A, B, C, D, E, F
345Klebsiella pneumoniaeMutation(s): 0 
Gene Names: ompK36
Membrane Entity: Yes 
UniProt
Find proteins for D6QLY0 (Klebsiella pneumoniae)
Explore D6QLY0 
Go to UniProtKB:  D6QLY0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD6QLY0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
C8E
Query on C8E

Download Ideal Coordinates CCD File 
BA [auth D]
CA [auth D]
DA [auth D]
EA [auth D]
FA [auth E]
BA [auth D],
CA [auth D],
DA [auth D],
EA [auth D],
FA [auth E],
G [auth A],
GA [auth E],
H [auth A],
HA [auth E],
I [auth A],
IA [auth E],
J [auth A],
JA [auth E],
K [auth A],
L [auth A],
LA [auth F],
M [auth A],
MA [auth F],
NA [auth F],
O [auth B],
P [auth B],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B],
X [auth C],
Y [auth C]
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
AA [auth D]
KA [auth E]
N [auth A]
OA [auth F]
W [auth B]
AA [auth D],
KA [auth E],
N [auth A],
OA [auth F],
W [auth B],
Z [auth C]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.09α = 90
b = 316.09β = 102.86
c = 73.79γ = 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
  • Version 1.1: 2024-01-24
    Changes: Data collection, Database references, Derived calculations, Refinement description