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FLASH GENE
Symbol TAP1 contributors: mct - updated : 01-12-2016
HGNC name transporter 1, ATP-binding cassette, sub-family B (MDR/TAP)
HGNC id 43
RNA
TRANSCRIPTS type messenger
identificationnb exonstypebpproduct
ProteinkDaAAspecific expressionYearPubmed
11 - 2974 - 808 - 1992 1453454
11 - 2234 - 547 - 1992 1453454
EXPRESSION
Type ubiquitous
   expressed in (based on citations)
organ(s)
SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
Digestiveesophagus   highly
Lymphoid/Immunelymph node   moderately
 spleen   highly
 thymus   highly
Reproductivefemale systemuteruscervix moderately
Urinarybladder   highly
cell lineage
cell lines
fluid/secretion blood
at STAGE
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • a N terminal transmembrane domain (six segments), and three tapasin binding sites, two of which are located in the N-terminal domains of TAP1 and TAP2
  • the third tapasin binding site is present in the core transmembrane (TM) domain of TAP1 and is used only by the unassembled subunits
  • a nucleotide binding domain
  • a C terminal ABC ATPase domain
  • mono polymer heteromer , dimer
    HOMOLOGY
    interspecies homolog to rattus Tap1 (72.60 pc)
    homolog to murine Tap1 (73.06 pc)
    Homologene
    FAMILY
  • ATP binding cassette superfamily
  • subfamily B (MDR/TAP)
  • CATEGORY immunity/defense , transport carrier
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,organelle,mitochondria
    intracellular,cytoplasm,organelle,membrane
    intracellular,cytoplasm,organelle,endoplasmic reticulum
    basic FUNCTION
  • transporting cytosolic peptides, generated by the proteasome, to the ER lumen for loading onto MHC class I molecules
  • involved in multidrug resistance
  • playing a key role in antigen processing and presentation
  • transporter associated with antigen processing (TAP1 and TAP2) represents a focal point in the immune recognition of virally or malignantly transformed cells by translocating proteasomal degradation products into the endoplasmic reticulum-lumen for loading of MHC class I molecules
  • TAP1, TAP2 binds to peptide-receptive MHC class I molecules to form the MHC class I peptide-loading complex (PLC)
  • normal influx of TAP1, TAP2-transported peptides in the ER during routine processing creates an efficient barrier for peptides from alternative processing routes
  • TAP1, TAP2 translocates cellular peptides across the endoplasmic reticulum membrane in an ATP hydrolysis-dependent manner
  • TAP1 and TAP-associated glycoprotein (TAPBP) play important roles in regulating MHC class I expression
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
  • component with TAP2 of a heterodimer, component of a functional peptide-transporting complex with HLA-I and TAPBP
  • ER-resident peptide-loading complex (PLC) consists of the transporter associated with antigen processing (TAP1 and TAP2), assembled with the auxiliary factors TAPBP and MHC I
  • TAP1, TAP2/TAPBP complex formation is driven by hydrophobic interactions via leucine zipper-like motifs
  • INTERACTION
    DNA
    RNA
    small molecule nucleotide,
  • ATP
  • protein
  • MHC-linked transporter associated with antigen processing 1
  • ABCB3
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s) BLS1B
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral     --over  
    correlated with a more aggressive phenotype as well as worse prognosis in hepatocellular carcinoma patients
    Susceptibility
  • to ankylosing spondytitis
  • to alopecia areata (AA)
  • Variant & Polymorphism SNP
  • association between a promoter SNP (rs2071480) and susceptibility to AA
  • Candidate gene
    Marker
    Therapy target
    SystemTypeDisorderPubmed
    cancerdigestiveliver
    inhibition of TAP1 might provide new therapeutic approaches for HCC
    ANIMAL & CELL MODELS