FAAH2

FAAH2
Identifiers
AliasesFAAH2, AMDD, fatty acid amide hydrolase 2
External IDsOMIM: 300654; GeneCards: FAAH2
Enzyme activity
EC #BRENDAExPASyKEGGMetaCyc
3.5.1.99↗↗↗↗
Orthologs
DatabasesNCBI: entry; OMA: entry
SpeciesHumanMouse
Entrez

158584

n/a

Ensembl

ENSG00000165591

n/a

UniProt

Q6GMR7

n/a

RefSeq (mRNA)

NM_174912
NM_001353840
NM_001353841

n/a

RefSeq (protein)

NP_777572
NP_001340769
NP_001340770

n/a

Location (UCSC)Chr X: 57.29 – 57.49 Mbn/a
PubMed search[2]n/a
Wikidata
View/Edit Human

Fatty acid amide hydrolase 2 or FAAH2 is a member of the serine hydrolase family of enzymes.[3]

Fatty acid amide hydrolase 2 degrades many types of fatty acid amides, including the sleep-inducing oleamide and endocannabinoids such as anandamide.[4] It has a tissue distribution quite distinct from the paralogous FAAH (or "FAAH1"). Compared to FAAH, it is less active on N-acyl ethanolamines (e.g. anandamide) and N-acyl taurines.[3]

OrthoDB indicates that FAAH2 (as a gene distinct from FAAH) has orthologs all across Metazoa, with the notable exclusion of rodents.[5] This complicates the translation of FAAH-related results from rodent models to human biology.[3]

Clinical significance

Defects in this enzyme have been associated with neurologic and psychiatric disorders. Specifically, a Canadian male with autism, anxiety, severe dysarthria, and a number of other issues have a Ala458Ser mutation inherited from his healthy carrier mother. In cell models this mutation is associated with a decreased function of this gene. This patient has a very abnormal blood lipid composition consistent with a loss of function.[6]

ClinVar reports a missense mutation that produces an early stop codon (Trp392Ter) is associated with Meckel-like syndrome.[7]

UniProt Variant Viewer lists a large number of other variants found in surveyed human genomes. Several are predicted to have consequences by PolyPhen and/or SIFT.[4]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000165591 – Ensembl, May 2017
  2. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  3. ^ a b c Wei BQ, Mikkelsen TS, McKinney MK, Lander ES, Cravatt BF (December 2006). "A second fatty acid amide hydrolase with variable distribution among placental mammals". The Journal of Biological Chemistry. 281 (48): 36569–78. doi:10.1074/jbc.M606646200. PMID 17015445.
  4. ^ a b "UniProt Q6GMR7". UniProt.
  5. ^ "9606_0:0045e6". OrthoDB | genes orthologs | Zdobnov lab.
  6. ^ Sirrs S, van Karnebeek CD, Peng X, Shyr C, Tarailo-Graovac M, Mandal R, et al. (March 2015). "Defects in fatty acid amide hydrolase 2 in a male with neurologic and psychiatric symptoms". Orphanet Journal of Rare Diseases. 10 38. doi:10.1186/s13023-015-0248-3. PMC 4423390. PMID 25885783.
  7. ^ "NM_174912.4(FAAH2):c.1175G>A (p.Trp392Ter) AND Meckel-like syndrome - ClinVar - NCBI". www.ncbi.nlm.nih.gov.

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