3PUH

Cocaine Esterase, wild-type biologically active dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Subunit stabilization and polyethylene glycolation of cocaine esterase improves in vivo residence time.

Narasimhan, D.Collins, G.T.Nance, M.R.Nichols, J.Edwald, E.Chan, J.Ko, M.C.Woods, J.H.Tesmer, J.J.Sunahara, R.K.

(2011) Mol.Pharmacol. 80: 1056-1065

  • DOI: 10.1124/mol.111.074997
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • No small-molecule therapeutic is available to treat cocaine addiction, but enzyme-based therapy to accelerate cocaine hydrolysis in serum has gained momentum. Bacterial cocaine esterase (CocE) is the fastest known native enzyme that hydrolyzes cocain ...

    No small-molecule therapeutic is available to treat cocaine addiction, but enzyme-based therapy to accelerate cocaine hydrolysis in serum has gained momentum. Bacterial cocaine esterase (CocE) is the fastest known native enzyme that hydrolyzes cocaine. However, its lability at 37°C has limited its therapeutic potential. Cross-linking subunits through disulfide bridging is commonly used to stabilize multimeric enzymes. Herein we use structural methods to guide the introduction of two cysteine residues within dimer interface of CocE to facilitate intermolecular disulfide bond formation. The disulfide-crosslinked enzyme displays improved thermostability, particularly when combined with previously described mutations that enhance stability (T172R-G173Q). The newly modified enzyme yielded an extremely stable form of CocE (CCRQ-CocE) that retained greater than 90% of its activity after 41 days at 37°C, representing an improvement of more than 4700-fold over the wild-type enzyme. CCRQ-CocE could also be modified by polyethylene glycol (PEG) polymers, which improved its in vivo residence time from 24 to 72 h, as measured by a cocaine lethality assay, by self-administration in rodents, and by measurement of inhibition of cocaine-induced cardiovascular effects in rhesus monkeys. PEG-CCRQ elicited negligible immune response in rodents. Subunit stabilization and PEGylation has thus produced a potential protein therapeutic with markedly higher stability both in vitro and in vivo.


    Organizational Affiliation

    Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cocaine esterase
A, B
587Rhodococcus sp. (strain MB1 Bresler)Mutation(s): 0 
Gene Names: cocE
EC: 3.1.1.84
Find proteins for Q9L9D7 (Rhodococcus sp. (strain MB1 Bresler))
Go to UniProtKB:  Q9L9D7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 73.345α = 90.00
b = 105.442β = 90.00
c = 224.518γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-21
    Type: Initial release
  • Version 1.1: 2013-06-26
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description