Refined homology model of monoacylglycerol lipase: toward a selective inhibitor.
Monoacylglycerol lipase (MGL) is primarily responsible for the hydrolysis of 2-arachidonoylglycerol (2-AG), an endocannabinoid with full agonist activity at both cannabinoid receptors. Increased tissue 2-AG levels consequent to MGL inhibition are considered therapeutic against pain, inflammation, and neurodegenerative disorders. However, the lack of MGL structural information has hindered the development of MGL-selective inhibitors. Here, we detail a fully refined homology model of MGL which preferentially identifies MGL inhibitors over druglike noninhibitors. We include for the first time insight into the active-site geometry and potential hydrogen-bonding interactions along with molecular dynamics simulations describing the opening and closing of the MGL helical-domain lid. Docked poses of both the natural substrate and known inhibitors are detailed. A comparison of the MGL active-site to that of the other principal endocannabinoid metabolizing enzyme, fatty acid amide hydrolase, demonstrates key differences which provide crucial insight toward the design of selective MGL inhibitors as potential drugs.
Bowman
Anna L
AL
Center for Drug Discovery, Northeastern University, Boston, MA 02115, USA. a.bowman@neu.edu
Makriyannis
Alexandros
A
D000595:Amino Acid Sequence; D001095:Arachidonic Acids / Q000378:metabolism*; D063388:Endocannabinoids; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005989:Glycerides / Q000378:metabolism*; D006801:Humans; D056004:Molecular Dynamics Simulation; D008969:Molecular Sequence Data; D008994:Monoacylglycerol Lipases / Q000037:antagonists & inhibitors* / Q000737:chemistry* / Q000378:metabolism; D017386:Sequence Homology, Amino Acid
D001095:Arachidonic Acids; D063388:Endocannabinoids; D004791:Enzyme Inhibitors; D005989:Glycerides; C094503:glyceryl 2-arachidonate; D008994:Monoacylglycerol Lipases