3D4F

SHV-1 beta-lactamase complex with LN1-255


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Strategic Design of an Effective {beta}-Lactamase Inhibitor: LN-1-255, A 6-ALKYLIDENE-2'-SUBSTITUTED PENICILLIN SULFONE

Pattanaik, P.Bethel, C.R.Hujer, A.M.Hujer, K.M.Distler, A.M.Taracila, M.Anderson, V.E.Fritsche, T.R.Jones, R.N.Pagadala, S.R.van den Akker, F.Buynak, J.D.Bonomo, R.A.

(2009) J Biol Chem 284: 945-953

  • DOI: 10.1074/jbc.M806833200
  • Primary Citation of Related Structures:  
    3D4F

  • PubMed Abstract: 
  • In an effort to devise strategies for overcoming bacterial beta-lactamases, we studied LN-1-255, a 6-alkylidene-2'-substituted penicillin sulfone inhibitor. By possessing a catecholic functionality that resembles a natural bacterial siderophore, LN-1 ...

    In an effort to devise strategies for overcoming bacterial beta-lactamases, we studied LN-1-255, a 6-alkylidene-2'-substituted penicillin sulfone inhibitor. By possessing a catecholic functionality that resembles a natural bacterial siderophore, LN-1-255 is unique among beta-lactamase inhibitors. LN-1-255 combined with piperacillin was more potent against Escherichia coli DH10B strains bearing bla(SHV) extended-spectrum and inhibitor-resistant beta-lactamases than an equivalent amount of tazobactam and piperacillin. In addition, LN-1-255 significantly enhanced the activity of ceftazidime and cefpirome against extended-spectrum cephalosporin and Sme-1 containing carbapenem-resistant clinical strains. LN-1-255 inhibited SHV-1 and SHV-2 beta-lactamases with nm affinity (K(I) = 110 +/- 10 and 100 +/- 10 nm, respectively). When LN-1-255 inactivated SHV beta-lactamases, a single intermediate was detected by mass spectrometry. The crystal structure of LN-1-255 in complex with SHV-1 was determined at 1.55A resolution. Interestingly, this novel inhibitor forms a bicyclic aromatic intermediate with its carbonyl oxygen pointing out of the oxyanion hole and forming hydrogen bonds with Lys-234 and Ser-130 in the active site. Electron density for the "tail" of LN-1-255 is less ordered and modeled in two conformations. Both conformations have the LN-1-255 carboxyl group interacting with Arg-244, yet the remaining tails of the two conformations diverge. The observed presence of the bicyclic aromatic intermediate with its carbonyl oxygen positioned outside of the oxyanion hole provides a rationale for the stability of this inhibitory intermediate. The 2'-substituted penicillin sulfone, LN-1-255, is proving to be an important lead compound for novel beta-lactamase inhibitor design.


    Organizational Affiliation

    Department of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-lactamase SHV-1A286Klebsiella pneumoniaeMutation(s): 0 
Gene Names: blashv1
EC: 3.5.2.6
Find proteins for P0AD64 (Klebsiella pneumoniae)
Explore P0AD64 
Go to UniProtKB:  P0AD64
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MA4
Query on MA4

Download CCD File 
A
CYCLOHEXYL-HEXYL-BETA-D-MALTOSIDE
C24 H44 O11
WUCWJXGMSXTDAV-QKMCSOCLSA-N
 Ligand Interaction
LN1
Query on LN1

Download CCD File 
A
(3R)-4-{[(3,4-dihydroxyphenyl)acetyl]oxy}-N-(2-formylindolizin-3-yl)-3-sulfino-D-valine
C22 H22 N2 O9 S
DEOZLEGRVHDNKC-UGKGYDQZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LN1Kd :  19   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.611α = 90
b = 55.503β = 90
c = 83.502γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance