Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 70.47 kDa 
• Atom Count: 4,672 
• Modelled Residue Count: 532 
• Deposited Residue Count: 574 
• Unique protein chains: 1

 3TSG

Crystal structure of GES-14

• PDB DOI: 10.2210/pdb3TSG/pdb

• Classification: HYDROLASE
• Organism(s): Acinetobacter baumannii
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2011-09-13 Released: 2012-09-26 
• Deposition Author(s): Delbruck, H., Hoffmann, K.M.V., Bebrone, C.

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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 

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

• PubMed: 22908160 
• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Extended-spectrum beta-lactamase GES-14	A, B	287	Acinetobacter baumannii	Mutation(s): 0  Gene Names: blaGES-14, ESBL EC: 3.5.2.6
UniProt
Find proteins for D3X610 (Acinetobacter baumannii) Explore D3X610  Go to UniProtKB:  D3X610

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
IOD	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
GOL	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

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 = 70.745	α = 90
b = 84.098	β = 90
c = 85.026	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
PHASER	phasing
REFMAC	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-09-26 
Deposition Author(s): Delbruck, H., Hoffmann, K.M.V., Bebrone, C.

Revision History  

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