3TSG

Crystal structure of GES-14


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Kinetic and crystallographic studies of extended-spectrum GES-11, GES-12, and GES-14 beta-lactamases.

Delbruck, H.Bogaerts, P.Kupper, M.B.Rezende de Castro, R.Bennink, S.Glupczynski, Y.Galleni, M.Hoffmann, K.M.Bebrone, C.

(2012) Antimicrob Agents Chemother 56: 5618-5625

  • DOI: 10.1128/AAC.01272-12
  • Primary Citation of Related Structures:  
    3TSG, 3V3R

  • PubMed Abstract: 
  • GES-1 is a class A extended-spectrum β-lactamase conferring resistance to penicillins, narrow- and expanded-spectrum cephalosporins, and ceftazidime. However, GES-1 poorly hydrolyzes aztreonam and cephamycins and exhibits very low k(cat) values for carbapenems ...

    GES-1 is a class A extended-spectrum β-lactamase conferring resistance to penicillins, narrow- and expanded-spectrum cephalosporins, and ceftazidime. However, GES-1 poorly hydrolyzes aztreonam and cephamycins and exhibits very low k(cat) values for carbapenems. Twenty-two GES variants have been discovered thus far, differing from each other by 1 to 3 amino acid substitutions that affect substrate specificity. GES-11 possesses a Gly243Ala substitution which seems to confer to this variant an increased activity against aztreonam and ceftazidime. GES-12 differs from GES-11 by a single Thr237Ala substitution, while GES-14 differs from GES-11 by the Gly170Ser mutation, which is known to confer increased carbapenemase activity. GES-11 and GES-12 were kinetically characterized and compared to GES-1 and GES-14. Purified GES-11 and GES-12 showed strong activities against most tested β-lactams, with the exception of temocillin, cefoxitin, and carbapenems. Both variants showed a significantly increased rate of hydrolysis of cefotaxime, ceftazidime, and aztreonam. On the other hand, GES-11 and GES-12 (and GES-14) variants all containing Ala243 exhibited increased susceptibility to classical inhibitors. The crystallographic structures of the GES-11 and GES-14 β-lactamases were solved. The overall structures of GES-11 and GES-14 are similar to that of GES-1. The Gly243Ala substitution caused only subtle local rearrangements, notably in the typical carbapenemase disulfide bond. The active sites of GES-14 and GES-11 are very similar, with the Gly170Ser substitution leading only to the formation of additional hydrogen bonds of the Ser residue with hydrolytic water and the Glu166 residue.


    Organizational Affiliation

    Institute of Molecular Biotechnology, RWTH-Aachen University, Aachen, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Extended-spectrum beta-lactamase GES-14A, B287Acinetobacter baumanniiMutation(s): 0 
Gene Names: blaGES-14ESBL
EC: 3.5.2.6
UniProt
Find proteins for D3X610 (Acinetobacter baumannii)
Explore D3X610 
Go to UniProtKB:  D3X610
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD3X610
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download Ideal Coordinates CCD File 
AA [auth A],
AB [auth B],
BA [auth A],
BB [auth B],
C [auth A],
AA [auth A],
AB [auth B],
BA [auth A],
BB [auth B],
C [auth A],
CA [auth A],
CB [auth B],
D [auth A],
DA [auth A],
DB [auth B],
E [auth A],
EA [auth A],
EB [auth B],
F [auth A],
FA [auth A],
FB [auth B],
G [auth A],
GB [auth B],
H [auth A],
HB [auth B],
I [auth A],
IB [auth B],
J [auth A],
K [auth A],
KA [auth B],
L [auth A],
LA [auth B],
M [auth A],
MA [auth B],
N [auth A],
NA [auth B],
O [auth A],
OA [auth B],
P [auth A],
PA [auth B],
Q [auth A],
QA [auth B],
R [auth A],
RA [auth B],
S [auth A],
SA [auth B],
T [auth A],
TA [auth B],
U [auth A],
UA [auth B],
V [auth A],
VA [auth B],
W [auth A],
WA [auth B],
X [auth A],
XA [auth B],
Y [auth A],
YA [auth B],
Z [auth A],
ZA [auth B]
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
GA [auth A],
HA [auth A],
IA [auth A],
JA [auth A],
JB [auth B],
GA [auth A],
HA [auth A],
IA [auth A],
JA [auth A],
JB [auth B],
KB [auth B],
LB [auth B],
MB [auth B],
NB [auth B],
OB [auth B],
PB [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.745α = 90
b = 84.098β = 90
c = 85.026γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Database references