Evidence map›Paper›PMID 32041998›Full record

ArticleScientific reports2020

The endocannabinoid hydrolase FAAH is an allosteric enzyme.

Enrico Dainese, Sergio Oddi, Monica Simonetti, Annalaura Sabatucci, Clotilde B Angelucci, Alice Ballone, Beatrice Dufrusine, Filomena Fezza, Gianni De Fabritiis, Mauro Maccarrone

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 24 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 2 pooled it
4.6field-weighted citation impact, top 5% 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

24 citing papers in PubMed, 2 syntheses or guidelines pooled it, 48 citations in OpenAlex.

  1. Pooled it
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

Enrico Dainese *Faculty of Biosciences, and Technology for Food Agriculture and Environment, University of Teramo, Teramo, Italy. edainese@unite.it.ORCID http://orcid.org/0000-0001-7163-9344
Sergio Oddi *European Center for Brain Research (CERC)/Santa Lucia Foundation, Rome, Italy.ORCID http://orcid.org/0000-0002-6217-698X
Monica SimonettiFaculty of Biosciences, and Technology for Food Agriculture and Environment, University of Teramo, Teramo, Italy.
Annalaura SabatucciFaculty of Biosciences, and Technology for Food Agriculture and Environment, University of Teramo, Teramo, Italy.
Clotilde B AngelucciFaculty of Veterinary Medicine, University of Teramo, Teramo, Italy.
Alice BalloneBarcelona Biomedical Research Park (PRBB), University of Pompeu Fabra and Icrea, Barcelona, Spain.
Beatrice DufrusineFaculty of Biosciences, and Technology for Food Agriculture and Environment, University of Teramo, Teramo, Italy.
Filomena FezzaDepartment of Experimental Medicine and Surgery, Tor Vergata University of Rome, Rome, Italy.
Gianni De FabritiisBarcelona Biomedical Research Park (PRBB), University of Pompeu Fabra and Icrea, Barcelona, Spain.
Mauro MaccarroneEuropean Center for Brain Research (CERC)/Santa Lucia Foundation, Rome, Italy. m.maccarrone@unicampus.it.ORCID http://orcid.org/0000-0002-3990-2963
University of Teramo · ITBarcelona Biomedical Research Park · ESUniversità Campus Bio-Medico · ITUniversity of Rome Tor Vergata · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fatty acid amide hydrolase (FAAH) is a membrane-bound homodimeric enzyme that in vivo controls content and biological activity of N-arachidonoylethanolamine (AEA) and other relevant bioactive lipids termed endocannabinoids. Parallel orientation of FAAH monomers likely allows both subunits to simultaneously recruit and cleave substrates. Here, we show full inhibition of human and rat FAAH by means of enzyme inhibitors used at a homodimer:inhibitor stoichiometric ratio of 1:1, implying that occupation of only one of the two active sites of FAAH is enough to fully block catalysis. Single W445Y substitution in rat FAAH displayed the same activity as the wild-type, but failed to show full inhibition at the homodimer:inhibitor 1:1 ratio. Instead, F432A mutant exhibited reduced specific activity but was fully inhibited at the homodimer:inhibitor 1:1 ratio. Kinetic analysis of AEA hydrolysis by rat FAAH and its F432A mutant demonstrated a Hill coefficient of ~1.6, that instead was ~1.0 in the W445Y mutant. Of note, also human FAAH catalysed an allosteric hydrolysis of AEA, showing a Hill coefficient of ~1.9. Taken together, this study demonstrates an unprecedented allosterism of FAAH, and represents a case of communication between two enzyme subunits seemingly controlled by a single amino acid (W445) at the dimer interface. In the light of extensive attempts and subsequent failures over the last decade to develop effective drugs for human therapy, these findings pave the way to the rationale design of new molecules that, by acting as positive or negative heterotropic effectors of FAAH, may control more efficiently its activity.

Indexed as

Allosteric RegulationAllosteric SiteAmidohydrolasesAnimalsArachidonic AcidsBenzamidesBiocatalysisCarbamatesCatalytic DomainDrug DesignEndocannabinoidsEnzyme AssaysFatty Acid Amide HydrolasesHumansHydrolysisKineticsAmidohydrolasesanandamideArachidonic AcidsBenzamidesCarbamatescyclohexyl carbamic acid 3'-carbamoylbiphenyl-3-yl esterEndocannabinoidsFatty Acid Amide HydrolasesPolyunsaturated AlkamidesProtein Subunits

Identifiers

PMID32041998
PMCPMC7010751
OpenAlexW3005151059

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.