6AFN

Crystal structure of class A b-lactamase, PenL, variant Cys69Tyr, from Burkholderia thailandensis, in complex with ceftazidime-like boronic acid

• PDB DOI: https://doi.org/10.2210/pdb6AFN/pdb

• Classification: HYDROLASE
• Organism(s): Burkholderia thailandensis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2018-08-08 Released: 2020-01-15 
• Deposition Author(s): Cao, T.-P., Choi, J.M., Lee, S.H.
• Funding Organization(s): National Research Foundation (Korea)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.170 
• R-Value Work: 0.147 
• R-Value Observed: 0.148 

Starting Model: experimental

Literature

Non-catalytic-Region Mutations Conferring Transition of Class A beta-Lactamases Into ESBLs.

Cao, T.-P., Yi, H., Dhanasingh, I., Ghosh, S., Choi, J.M., Lee, K.H., Ryu, S., Kim, H.S., Lee, S.H.

(2020) Front Mol Biosci 

• DOI: https://doi.org/10.3389/fmolb.2020.598998

Biological Assembly 1  

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

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 29.16 kDa 
• Atom Count: 2,502 
• Modelled Residue Count: 268 
• Deposited Residue Count: 268 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-lactamase	A	268	Burkholderia thailandensis	Mutation(s): 1  Gene Names: A8H35_31635 EC: 3.5.2.6
UniProt
Find proteins for Q2T5A3 (Burkholderia thailandensis (strain ATCC 700388 / DSM 13276 / CCUG 48851 / CIP 106301 / E264)) Explore Q2T5A3  Go to UniProtKB:  Q2T5A3

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CB4	B [auth A]	PINACOL[[2-AMINO-ALPHA-(1-CARBOXY-1-METHYLETHOXYIMINO)-4-THIAZOLEACETYL]AMINO]METHANEBORONATE C10 H15 B N4 O6 S ZECCQELUYUPTSB-UUASQNMZSA-N
GOL	C [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.170 
• R-Value Work: 0.147 
• R-Value Observed: 0.148 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.66	α = 90
b = 53.238	β = 90
c = 122.981	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-01-15 
Deposition Author(s): Cao, T.-P., Choi, J.M., Lee, S.H.

---

Funding Organization	Location	Grant Number
National Research Foundation (Korea)	Korea, Republic Of	NRF-2016R1D1A1B03932717

Revision History  

• Version 1.0: 2020-01-15
  Type: Initial release
  
• Version 1.1: 2020-02-19
  Changes: Database references, Source and taxonomy, Structure summary
• Version 1.2: 2020-12-09
  Changes: Database references
• Version 1.3: 2023-11-22
  Changes: Data collection, Database references, Refinement description