Co-crystallization studies of full length recombinant BChE with cocaine offers insights into cocaine detoxification
[CHLE_HUMAN] Defects in BCHE are the cause of butyrylcholinesterase deficiency (BChE deficiency) [MIM:177400]. BChE deficiency is a metabolic disorder characterized by prolonged apnoea after the use of certain anesthetic drugs, including the muscle relaxants succinylcholine or mivacurium and other ester local anesthetics. The duration of the prolonged apnoea varies significantly depending on the extent of the enzyme deficiency. BChE deficiency is a multifactorial disorder. The hereditary condition is transmitted as an autosomal recessive trait.
Publication Abstract from PubMed
Human butyrylcholinesterase (BChE; EC 22.214.171.124) is a 340 kDa tetrameric glycoprotein that is present in human serum at about 5 mg l(-1) and has well documented therapeutic effects on cocaine toxicity. BChE holds promise as a therapeutic that reduces and finally eliminates the rewarding effects of cocaine, thus weaning an addict from the drug. There have been extensive computational studies of cocaine hydrolysis by BChE. Since there are no reported structures of BChE with cocaine or any of the hydrolysis products, full-length monomeric recombinant wild-type BChE was cocrystallized with cocaine. The refined 3 A resolution structure appears to retain the hydrolysis product benzoic acid in sufficient proximity to form a hydrogen bond to the active-site Ser198.
Cocrystallization studies of full-length recombinant butyrylcholinesterase (BChE) with cocaine.,Asojo OA, Asojo OA, Ngamelue MN, Homma K, Lockridge O Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Apr 1;67(Pt, 4):434-7. Epub 2011 Mar 24. PMID:21505234
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.