Evidence map›Paper›PMID 20436035›Full record

ArticleProtein engineering, design & selection : PEDS2010

Structural analysis of thermostabilizing mutations of cocaine esterase.

Diwahar Narasimhan, Mark R Nance, Daquan Gao, Mei-Chuan Ko, Joanne Macdonald, Patricia Tamburi, Dan Yoon, Donald M Landry, James H Woods, Chang-Guo Zhan and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in Protein engineering, design & selection : PEDS, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 52 citations in OpenAlex.

  1. TargetingPharmaceuticals (Basel, Switzerland) · 2025
    Article
  2. Article
  3. Characterization of a thermostable Cas13 enzyme for one-pot detection of SARS-CoV-2.Proceedings of the National Academy of Sciences of the United States of America · 2022
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  4. Review
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  6. Observational
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  13. Long-lasting effects of a PEGylated mutant cocaine esterase (CocE) on the reinforcing and discriminative stimulus effects of cocaine in rats.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2012
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 3 institutions in 1 country.

Diwahar NarasimhanDepartment of Pharmacology, University of Michigan, Ann Arbor, MI, USA.
Mark R Nance
Daquan Gao
Mei-Chuan Ko
Joanne Macdonald
Patricia Tamburi
Dan Yoon
Donald M Landry
James H Woods
Chang-Guo Zhan
John J G Tesmer
Roger K Sunahara
Columbia University · USUniversity of Michigan–Ann Arbor · USUniversity of Kentucky · US

Funding

Structure, function, and inhibition of G protein-coupled receptor kinasesR01HL071818 · NHLBI · UNIVERSITY OF TEXAS AUSTIN · PI TESMER, JOHN · 2004 to 2023
$7.1M
Development of Esterases for the Treatment of Cocaine Overdose and AbuseR01DA021416 · NIDA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI WOODS, JAMES H · 2006 to 2009
$2.8M
High-activity mutants of cocaine esterase for treatment of drug addictionR01DA025100 · NIDA · UNIVERSITY OF KENTUCKY · PI LANDRY, DONALD W, WOODS, JAMES H · 2008 to 2012
$2.5M
Redesign of Butyrylcholinesterase for Cocaine MetabolismR01DA013930 · NIDA · UNIVERSITY OF KENTUCKY · PI ZHAN, CHANG-GUO · 2003 to 2010
$2.4M
NHLBI NIH HHS R01 HL071818NIDA NIH HHS DA013930NIDA NIH HHS DA021416NIDA NIH HHS DA 025100NIDA NIH HHS R01 DA025100
6 · The paper itself

Abstract

Cocaine is considered to be the most addictive of all substances of abuse and mediates its effects by inhibiting monoamine transporters, primarily the dopamine transporters. There are currently no small molecules that can be used to combat its toxic and addictive properties, in part because of the difficulty of developing compounds that inhibit cocaine binding without having intrinsic effects on dopamine transport. Most of the effective cocaine inhibitors also display addictive properties. We have recently reported the use of cocaine esterase (CocE) to accelerate the removal of systemic cocaine and to prevent cocaine-induced lethality. However, wild-type CocE is relatively unstable at physiological temperatures (tau(1/2) approximately 13 min at 37 degrees C), presenting challenges for its development as a viable therapeutic agent. We applied computational approaches to predict mutations to stabilize CocE and showed that several of these have increased stability both in vitro and in vivo, with the most efficacious mutant (T172R/G173Q) extending half-life up to 370 min. Here we present novel X-ray crystallographic data on these mutants that provide a plausible model for the observed enhanced stability. We also more extensively characterize the previously reported variants and report on a new stabilizing mutant, L169K. The improved stability of these engineered CocE enzymes will have a profound influence on the use of this protein to combat cocaine-induced toxicity and addiction in humans.

Indexed as

Molecular Dynamics SimulationBacterial ProteinsCarboxylic Ester HydrolasesCocaineCocaine-Related DisordersCrystallography, X-RayEnzyme StabilityEscherichia coliKineticsMutagenesis, Site-DirectedProtein ConformationRecombinant ProteinsRhodococcusTemperatureBacterial ProteinsCarboxylic Ester HydrolasesCocainecocaine esteraseRecombinant Proteins

Identifiers

PMID20436035
PMCPMC2920302
OpenAlexW2107454306

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.