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FLASH GENE
Symbol SLC22A4 contributors: shn - updated : 13-01-2009
HGNC name solute carrier family 22 (organic cation/ergothioneine transporter), member 4
HGNC id 10968
DNA
TYPE functioning gene
STRUCTURE 49.76 kb     10 Exon(s)
10 Kb 5' upstream gene genomic sequence study
MAPPING cloned Y linked   status confirmed
Map cen - D5S2057 - D5S1984 - SLC22A4 - D5S2002 - D5S2497 - qter cDNA for a novel proton/organic cation transporter, OCTN1 , was cloned from human fetal liver and was mapped to 5q31
RNA
TRANSCRIPTS type messenger
identificationnb exonstypebpproduct
ProteinkDaAAspecific expressionYearPubmed
10 - 2.214 65 551 expression in human corneal and conjunctival epithelial cells 2008 18641280
EXPRESSION
Type widely
   expressed in (based on citations)
organ(s)
SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
Cardiovascularheart   highly Homo sapiens
Digestiveintestine   highly Homo sapiens
 liver   highly Homo sapiens
Nervousbrain   highly Homo sapiens
 spinal cord   highly
Reproductivefemale systembreastmammary gland highly
 male systemprostate  highly
Respiratoryrespiratory tracttrachea   
Urinarykidneytubule  highly Homo sapiens
tissue
SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
Blood / Hematopoieticbone marrow   
Connectivebone   
Muscularstriatumskeletal highly Homo sapiens
cells
SystemCellPubmedSpeciesStageRna symbol
Blood/Hematopoieticmature hematopoietic
skeletonsynovium
cell lineage OCTN1 mRNA expression was detected in cultured human corneal-limbal epithelial (HCLE) and human conjunctival epithelial (HCjE) cells of rabbits and humans
cell lines cancer cell lines (G361, A549, SW480, K-562, HeLa cellS3)
fluid/secretion
at STAGE
physiological period fetal
Text liver, kidney, lung, brain
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • eleven predicted transmembrane domains
  • a nucleotide-binding site motif
  • a motif conserved in sugar transporters
  • four potential N-glycosylation sites
  • five potential protein kinase C phosphorylation sites
  • HOMOLOGY
    interspecies homolog to murine Slc22a4
    homolog to rattus Actn1
    intraspecies homolog to slc22a5
    Homologene
    FAMILY
  • major facilitator superfamily
  • organic cation transporter family
  • CATEGORY enzyme , transport carrier
    SUBCELLULAR LOCALIZATION     plasma membrane
    text renal tubule apical membrane
    basic FUNCTION
  • polyspecific transporter of organic cations, pH dependent, sodium independent, functioning as a transporter in lymphoid organs or inflammatory milieu
  • may play a significant role in transport of carnitine in occular tissues and an intrinsic homeostatic role for carnitine in eye
  • contributes less to carnitine transport than SLC22A5 because of its low carnitine transport activity
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    text carnitine transport
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • RUNX1 binding
  • cell & other
    REGULATION
    Other regulated by RUNX1
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Susceptibility
  • a SNP affects the transcriptional efficiency of SLC22A4 in vitro, owing to an allelic difference in affinity to Runt-related transcription factor-1 (RUNX1; 151385), a transcriptional regulator in the hematopoietic system. A SNP in RUNX1 (151385.0007) was also strongly associated with rheumatoid arthritis
  • regulation of SLC22A4 expression by RUNX1 is associated with susceptibility to rheumatoid arthritis
  • to Crohn disease (see IBD5)
  • Variant & Polymorphism SNP , other a missense substitution increasing the susceptibility to Crohn disease
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS