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FLASH GENE
Symbol FA2H contributors: mct/shn - updated : 17-04-2013
HGNC name fatty acid 2-hydroxylase
HGNC id 21197
DNA
TYPE functioning gene
STRUCTURE 61.87 kb     7 Exon(s)
MAPPING cloned Y linked N status provisional
Map cen - D16S3018 - D16S3115 - FA2H - D16S3051 - D16S3118 - qter
Physical map
LOC388290 16 similar to protein 40kD LOC390740 16 similar to peptidylprolyl isomerase A (cyclophilin A) PSMD7 16q22.2 proteasome (prosome, macropain) 26S subunit, non-ATPase, 7 (Mov34 homolog) LOC388291 16 LOC388291 LOC283922 16q22.3 hypothetical protein LOC283922 LOC388292 16 similar to NPIP-like protein LOC388293 16 similar to nuclear pore complex interacting protein LOC388294 16 similar to secretory protein LOC348174 LOC388295 16 LOC388295 GLG1 16q22-q23 golgi apparatus protein 1 FLJ10520 16q22.3 hypothetical protein FLJ10520 FLJ34389 16q22.3 hypothetical protein FLJ34389 FA2H 16q23 fatty acid 2-hydroxylase FLJ12270 16q22.3 hypothetical protein FLJ12270 ZNRF1 16q22.3 zinc and ring finger protein 1 LDHD 16q22.3 lactate dehydrogenase D ZFP1 16q22.3 zinc finger protein 1 homolog (mouse) CTRB1 16q23.1-q23.2 chymotrypsinogen B1 LOC390741 16 similar to 40S ribosomal protein S4, Y isoform LOC339102 16q22.3 similar to Chymotrypsinogen B precursor LOC146599 16q22.3 hypothetical LOC146599 BCAR1 16q22-q23 breast cancer anti-estrogen resistance 1 LOC388296 16 LOC388296 CFDP1 16q22.2-q22.3 craniofacial development protein 1 LOC388297 16 similar to hypothetical protein - fruit fly (Drosophila melanogaster) transposon pogoR11 LOC124491 16q22.3 LOC124491 CHST6 16q22 carbohydrate (N-acetylglucosamine 6-O) sulfotransferase 6 LOC388298 16 LOC388298 CHST5 16q23.1 carbohydrate (N-acetylglucosamine 6-O) sulfotransferase 5 GABARAPL2 16q22.3-q24.1 GABA(A) receptor-associated protein-like 2 ADAT1 16q22.2-q22.3 adenosine deaminase, tRNA-specific 1 KARS 16q23-q24 lysyl-tRNA synthetase
RNA
TRANSCRIPTS type messenger
identificationnb exonstypebpproduct
ProteinkDaAAspecific expressionYearPubmed
7 - 2442 43 372 - - 15337768
EXPRESSION
Type widely
   expressed in (based on citations)
organ(s)
SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
Digestiveintestinelarge intestinecolon highly Homo sapiensAdultNM_024306
 stomach   highly Mus musculusAdultNM_178086
Endocrinepancreas   lowly Homo sapiensAdultNM_024306
Nervousbrain   highly Homo sapiensAdultNM_024306
 brain   moderately Mus musculusAdultNM_178086
Reproductivemale systemtestis  highly Mus musculusAdultNM_178086
 male systemtestis  moderately Homo sapiensAdultNM_024306
 male systemprostate  moderately Homo sapiensAdultNM_024306
Skin/Tegumentskin   highly Mus musculusAdultNM_178086
Urinarykidney   lowly Mus musculusAdultNM_178086
 kidney   lowly Homo sapiensAdultNM_024306
cell lineage expressed in cultured human keratinocytes and human epidermis
cell lines
fluid/secretion
at STAGE
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • N-terminal cytochrome b5 domain and four potential transmembrane domains
  • a iron-binding histidine motif conserved among membrane-bound desaturases/hydroxylases
  • a sterol desaturase domain at residues 210367
  • conjugated HemoP
    HOMOLOGY
    interspecies homolog to yeast ceramide 2-hydroxylase gene (FAH1)
    ortholog to Fa2h, Mus musculus
    ortholog to Fa2h, Rattus norvegicus
    ortholog to FA2H, Pan troglodytes
    ortholog to fa2h, Danio rerio
    Homologene
    FAMILY
  • cytochrome b5 family
  • SCS7 family
  • CATEGORY enzyme
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,cytoplasm,organelle,mitochondria,outer
    intracellular,cytoplasm,organelle,membrane
    intracellular,cytoplasm,organelle,endoplasmic reticulum
    intracellular,cytoplasm,cytosolic,microsome
    text EGFP-FA2H fusion protein co-localized with calnexin, indicating that the enzyme resides in the endoplasmic reticulum
    basic FUNCTION
  • catalyzes the 2-hydroxylation of myelin galactolipids, galactosylceramide, and its sulfated form, sulfatide
  • membrane bound hemoprotein which function as an electron carrier for membrane bound oxygenase
  • involved in the formation of myelin 2-hydroxy galactosylceramides and -sulfatides
  • accounts for 2-hydroxyceramide/2-hydroxyglucosylceramide synthesis in epidermis and is required for epidermal permeability barrier formation
  • catalyze the initial step of straight chain fatty acid alpha-oxidation (Guo 2010)
  • role in adipocyte lipogenesis possibly by modulation of raft fluidity and level of SLC2A4 (Guo 2010)
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism energetic
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
    cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s) SDWHD , SPG35
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS
  • FA2H-siRNA in cultured human keratinocytes suppressed 2-hydroxylase activity and decreased 2-hydroxyceramide/2-hydroxyglucosylceramide levels in keratinocytes and contained abnormal epidermal lamellar bodies and did not form the normal extracellular lamellar membranes
  • FA2H-deficient (FA2H(-/-)) mice lacked 2-hydroxylated sphingolipids in the brain and in peripheral nerves while nonhydroxylated galactosylceramide is increased
  • 18-month-old FA2H(-/-) mice, however, exhibited scattered axonal and myelin sheath degeneration in the spinal cord and an even more pronounced loss of stainability of myelin sheaths in sciatic nerves