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Symbol SLC22A3 contributors: mct/npt - updated : 07-10-2015
HGNC name solute carrier family 22 (extraneuronal monoamine transporter), member 3
HGNC id 10967
Location 6q25.3      Physical location : 160.769.424 - 160.876.013
Synonym name
  • extraneural monoamine transporter
  • EMT organic cation transporter 3
  • solute carrier family 22 member 3
  • Synonym symbol(s) EMT, OCT3, EMTH
    TYPE functioning gene
    SPECIAL FEATURE component of a cluster
    text part of the cluster SLC22A3-LPAL2-LPA
    STRUCTURE 106.59 kb     11 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Promoter
    Binding site
    text structure promoter with binding sites for ubiquitous transcription factors SP1
    MAPPING cloned N linked   status confirmed
    Physical map
    LOC389439 6 LOC389439 LOC202459 6q25.3 similar to RIKEN cDNA 2310008M10 LOC389440 6 LOC389440 LOC346064 6q25.3 similar to SNARE protein Ykt6; YKT6, S. cerevisiae, homolog of RSHL2 6q25.3 radial spokehead-like 2 TAGAP 6q25.3 T-cell activation GTPase activating protein LOC389441 6 LOC389441 LOC389442 6 LOC389442 LOC389443 6 LOC389443 LOC389444 6 similar to frazzled CG8581-PA FNDC1 6q25 fibronectin type III domain containing 1 LOC389445 6 similar to 60S ribosomal protein L21 SOD2 6q25.2 superoxide dismutase 2, mitochondrial WTAP 6q25-q27 Wilms tumor 1 associated protein ACAT2 6q25.3-q26 acetyl-Coenzyme A acetyltransferase 2 (acetoacetyl Coenzyme A thiolase) TCP1 6q25.1-q25.2 t-complex 1 MRPL18 6q25.3 mitochondrial ribosomal protein L18 PNLDC1 6q25.3 poly(A)-specific ribonuclease (PARN)-like domain containing 1 MAS1 6q25.3-q26 MAS1 oncogene IGF2R 6q26-q27 insulin-like growth factor 2 receptor SLC22A1 6q27 solute carrier family 22 (organic cation transporter), member 1 SLC22A2 6q26-q27 solute carrier family 22 (organic cation transporter), member 2 SLC22A3 6q26-q27 solute carrier family 22 (extraneuronal monoamine transporter), member 3 APOAL 6q26-q27 apolipoprotein A-like LPA 6q26-q27 lipoprotein, Lp(a) PLG 6q26 plasminogen LOC389446 6 similar to apolipoprotein(a) (EC 3.4.21.-) - rhesus macaque (fragment) LOC389447 6 LOC389447 MAP3K4 6q25.3 mitogen-activated protein kinase kinase kinase 4 AGPAT4 6q25.3 1-acylglycerol-3-phosphate O-acyltransferase 4 (lysophosphatidic acid acyltransferase, delta) C6orf59 6q25.3 chromosome 6 open reading frame 59 PARK2 6q25.2-q27 Parkinson disease (autosomal recessive, juvenile) 2, parkin
    regionally located clustered with SLC22A1 and SLC22A2
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    11 - 5624 61.15 556 - Gründemann (2000)
    Type widely
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Hearing/Equilibriumear   predominantly
    Nervousbrain   highly
    Reproductivemale systemprostate  highly
    cell lineage endometrial stroma (Bottalico 2007)
    cell lines
    at STAGE
    physiological period pregnancy
    Text placenta, most abundantly
  • twelve transmembrane domains (12TM)
  • cytoplasmic N and C termini
  • one nucleotide (ATP/GTP) binding site motif
  • major facilitator superfamily
  • organic cation transporter family
  • solute carrier family 22, extraneuronal monoamine
  • CATEGORY transport carrier
    SUBCELLULAR LOCALIZATION     plasma membrane
    text to the basolateral membrane (BLM) (Glube 2008)
    basic FUNCTION
  • polyspecific transporter of organic cations, sodium independent
  • playing a key role in the clearance of monoamines from extracellular compartments (Bottalico 2007)
  • can potentially regulate reuptake of monoamines in general and histamine in particular (Bottalico 2007)
  • participate in the renal secretion of several therapeutic agents, and interacts with renally secreted drugs (Glube 2008)
  • may modulate dopaminergic damage by bidirectionally regulating the local bioavailability of exogenous and endogenous toxic species (Cui 2009)
  • pivotal modulator of neurodegeneration in the nigrostriatal dopaminergic pathway (Cui 2009)
  • functions as a cation transporter in various organs, including prostate tissue, and plays a role eliminating small organic cations and toxins
  • NUDT11, SLC22A3, HNF1b contribute to prostate cancer pathogenesis
    PHYSIOLOGICAL PROCESS facilitated diffusion transport
    signaling signal transduction
    a component
    small molecule
    cell & other
    Other regulated by phosphorylation/dephosphorylation mechanisms, active in the dephosphorylated state
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional     --low  
    lower expression of mRNAs in pre-eclamptic placentae as compared to the control group (Bottalico 2004)
    tumoral     --low  
    inversely correlated with Prostate carcinoma progression, with reduced expression as disease advances
    constitutional     --over  
    of SLC22A3 and SLC47A1 in human placenta indicates these transporters may play a role in fetal protection preferentially at earlier stages of gestation
  • to coronary artery disease
  • to the development of polysubstance use in Japanese patients with Methamphetamine (MAP) dependence
  • to euphoria and potential for addiction and susceptibility to the toxicity of substances of abuse
  • Variant & Polymorphism SNP
  • four SNPs overlapping the SLC22A3-LPAL2-LPA gene cluster associated to risk of coronary artery disease (Tregouet 2009)
  • polymorphisms of SLC22A3 related to the development of polysubstance use in Japanese patients with MAP dependence (Aoyama 2006)
  • polymorphisms may reduce or inactivate the function of SLC22A3 and therefore enhance the euphoria and potential for addiction and susceptibility to the toxicity of substances of abuse (Cui 2009)
  • Candidate gene
    Therapy target Monoamine transporters may serve as a protective mechanism preventing vasoconstriction in the placental vascular bed and thereby securing a stable blood flow to the fetus (Bottalico 2004)