RGD Reference Report - Structure-guided inhibitor design for human FAAH by interspecies active site conversion. - Rat Genome Database

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Structure-guided inhibitor design for human FAAH by interspecies active site conversion.

Authors: Mileni, Mauro  Johnson, Douglas S  Wang, Zhigang  Everdeen, Daniel S  Liimatta, Marya  Pabst, Brandon  Bhattacharya, Keshab  Nugent, Richard A  Kamtekar, Satwik  Cravatt, Benjamin F  Ahn, Kay  Stevens, Raymond C 
Citation: Mileni M, etal., Proc Natl Acad Sci U S A. 2008 Sep 2;105(35):12820-4. doi: 10.1073/pnas.0806121105. Epub 2008 Aug 27.
RGD ID: 13432302
Pubmed: PMID:18753625   (View Abstract at PubMed)
PMCID: PMC2529035   (View Article at PubMed Central)
DOI: DOI:10.1073/pnas.0806121105   (Journal Full-text)

The integral membrane enzyme fatty acid amide hydrolase (FAAH) hydrolyzes the endocannabinoid anandamide and related amidated signaling lipids. Genetic or pharmacological inactivation of FAAH produces analgesic, anxiolytic, and antiinflammatory phenotypes but not the undesirable side effects of direct cannabinoid receptor agonists, indicating that FAAH may be a promising therapeutic target. Structure-based inhibitor design has, however, been hampered by difficulties in expressing the human FAAH enzyme. Here, we address this problem by interconverting the active sites of rat and human FAAH using site-directed mutagenesis. The resulting humanized rat (h/r) FAAH protein exhibits the inhibitor sensitivity profiles of human FAAH but maintains the high-expression yield of the rat enzyme. We report a 2.75-A crystal structure of h/rFAAH complexed with an inhibitor, N-phenyl-4-(quinolin-3-ylmethyl)piperidine-1-carboxamide (PF-750), that shows strong preference for human FAAH. This structure offers compelling insights to explain the species selectivity of FAAH inhibitors, which should guide future drug design programs.




Molecular Function

  
Object Symbol
Species
Term
Qualifier
Evidence
With
Notes
Source
Original Reference(s)
FaahRatidentical protein binding enablesIPIUniProtKB:P97612PMID:18753625IntAct 


Genes (Rattus norvegicus)
Faah  (fatty acid amide hydrolase)