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FLASH GENE
Symbol SLC5A8 contributors: mct/npt/pgu - updated : 30-06-2014
HGNC name solute carrier family 5 (iodide transporter), member 8
HGNC id 19119
Location 12q23.1      Physical location : 101.549.994 - 101.604.016
Synonym name
  • sodium solute symporter family 5 member 8 protein
  • sodium-coupled monocarboxylate transporters 1 high-affinity
  • Na(+)/monocarboxylate transporter
  • apical iodide transporter
  • electrogenic sodium monocarboxylate cotransporter3
  • Synonym symbol(s) AIT, SMCT1, SMCT
    DNA
    TYPE functioning gene
    STRUCTURE 54.02 kb     15 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    MAPPING cloned Y linked N status provisional
    RNA
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    15 - 3286 - 610 - 2010 20082847
    EXPRESSION
    Type restricted
       expressed in (based on citations)
    organ(s)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Nervousbrain    
    Reproductivefemale systemuteruscervix  
    Respiratoryrespiratory tracttrachea   
    Urinarykidneytubulecollecting duct specific
    Visualeyeretina   
    tissue
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Epithelialbarrier liningretinal pigment epithelium (RPE)  
    Nervous    
    cells
    SystemCellPubmedSpeciesStageRna symbol
    Nervousneuron
    cell lineage
    cell lines
    fluid/secretion
    at STAGE
    PROTEIN
    PHYSICAL PROPERTIES
    STRUCTURE
    motifs/domains
  • a SSF motif
  • HOMOLOGY
    interspecies ortholog to murine Slc5a8
    ortholog to rattus LOC500820
    intraspecies homolog to SLC5A5
    Homologene
    FAMILY
  • sodium/solute symporter family (SSF), Na+/iodide/myoinositol/multivitamin symporters
  • CATEGORY tumor suppressor , transport carrier
    SUBCELLULAR LOCALIZATION     plasma membrane
    text
  • with SLC5A12 are expressed in the apical membrane of the tubular cell
  • localized to the apical membrane of epithelial cells lining the intestinal tract and proximal tubule
  • basic FUNCTION
  • thyroid apical iodide transporter, mediating iodide uptake in the thyroid gland
  • sodium solute symporter, that may be a favorable indicator of colorectal cancer prognosis
  • play a differential role in monocarboxylate transport in the retina in a cell type-specific manner
  • involved in lactate absorption in the latter parts of the renal proximal tubule
  • transports not only nicotinate and its structural analogs but also various monocarboxylate drugs
  • may participate in the intestinal absorption of monocarboxylate drugs
  • high-affinity transporter involved in lactate absorption in the latter parts of the proximal tubule
  • physiologic functions of SLC5A8 include absorption of short-chain fatty acids in the colon and small intestine, reabsorption of lactate and pyruvate in the kidney, and cellular uptake of lactate and ketone bodies in neurons
  • can also transport a variety of pharmacologically relevant monocarboxylates, including salicylates, benzoate, and gamma-hydroxybutyrate
  • function as a tumor suppressor gene whose silencing by epigenetic changes may contribute to carcinogenesis and progression of pancreatic cancer
  • possesses a anionic leak current that becomes significant whenever external Na(+) concentration is reduced
  • induces Na(+)-dependent transport of pyroglutamate that is inhibitable by various SLC5A8 substrates
  • SLC5A8 nuclear translocation and loss of expression are associated with poor outcome in pancreatic ductal adenocarcinoma
  • sodium-coupled transporter for monocarboxylates
  • suppresses tumour progression through depletion of survivin without involving its transport function
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism other
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • non-steroidal anti-inflammatory drugs such as ibuprofen, ketoprofen, and fenoprofen, also interact with SLC5A8
  • CDX1 and CDX2 binds to the SLC5A8 promoter, which might therefore regulate the uptake of these substances in the colon
  • cell & other
    REGULATION
    Other stimulation of activity induced by diclofenac in RPE cells
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral        
    silenced by methylation in colon cancer, and in papillary thyroid carcinomas of classical form (associated with T1796A point mutation of the BRAF) gene
    tumoral     --over  
    in colorectal cancer correlates with longer disease-free survival
    tumoral     --low  
    by aberrant promoter methylation in pancreatic adenocarcinoma
    tumoral     --low  
    DNA methylation in the SLC5A8 promoter region may suppress the expression of SLC5A8 in lung tumor (
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    SystemTypeDisorderPubmed
    cancer  
    novel regulatory sequence that may be used to increase expression of the SLC5A8 gene in cancer gene therapy
    cancerreproductivebreast
    pharmacological approaches to reactivate SLC5A8 expression in tumor cells have potential as a novel therapeutic strategy for breast cancer treatment
    ANIMAL & CELL MODELS