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FLASH GENE
Symbol TMUB1 contributors: mct - updated : 15-04-2021
HGNC name transmembrane and ubiquitin-like domain containing 1
HGNC id 21709
Location 7q36.1      Physical location : 150.778.172 - 150.780.620
Synonym name
  • chromosome 7 open reading frame 21
  • hepatocyte odd protein shuttling
  • Synonym symbol(s) SB144, MGC5442, C7orf21, HOPS, DULP
    DNA
    TYPE functioning gene
    STRUCTURE 2.45 kb     3 Exon(s)
    MAPPING cloned Y linked N status provisional
    RNA
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    3 - 1810 26.3 246 - 2005 16014383
    3 - 1347 26.3 246 - 2005 16014383
    EXPRESSION
    Type widely
       expressed in (based on citations)
    organ(s)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Digestiveintestinesmall intestine  highly
     liver     Homo sapiens
    Lymphoid/Immunelymph node   highly
    Nervousbrain   highly Homo sapiens
     braindiencephalonthalamus predominantly Homo sapiens
    Reproductivefemale systemuteruscervix highly
    Visualeyelens    Mus musculus
    tissue
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Nervouscentral  highly Homo sapiens
    cells
    SystemCellPubmedSpeciesStageRna symbol
    Digestivehepatocyte Homo sapiens
    Lymphoid/Immunedendritic cell Homo sapiens
    cell lineage
    cell lines
    fluid/secretion
    at STAGE
    PROTEIN
    PHYSICAL PROPERTIES
    STRUCTURE
    motifs/domains
  • one ubiquitin-like domain
  • a putative NES and a proline-rich region
  • a domain spanning from 103 aa to 176 aa, which was 26p100 identical and 34p100 homologous to human ubiquitin
  • HOMOLOGY
    interspecies homolog to rattus LOC362301
    Homologene
    FAMILY
    CATEGORY regulatory
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,cytosolic
    intracellular,cytoplasm,cytoskeleton,microtubule,centrosome
    intracellular,nucleus,nucleolus
    text
  • found to be co-localized with CAMLG to the cytoplasm
  • associated with classical markers of centrosomes
  • predominately in the nucleus with weak cytosolic expression
  • moves between nucleus and cytoplasm
  • TMUB1 is observed in lens cortex and nucleus
  • basic FUNCTION
  • cAMP-dependent shuttling protein involved in protein synthesis regulation
  • implication in the control of cell division, and its contribution appears relevant to understand genomic instability and centrosome amplification in cancer
  • plays a role in regulating basal synaptic transmission and contributes to maintain the synaptic surface number of the GRIA2-containing AMPARs by facilitating the recycling of GRIA2 to the plasma membrane
  • may mainly function in the nucleus
  • implicated in the regulation of locomotor activity and wakefulness and can potentially bind to and function together with CAMLG
  • is involved in liver regeneration and functions as a bridging protein in tumor cell proliferation
  • TMUB1 functions as a cell proliferation inhibitor and cell cycle&
  • 8209;associated protein
  • is likely an important negative regulator of hepatocyte proliferation in liver regeneration through STAT3 signaling
  • has an inhibitory effect on normal hepatocytes
  • TMUB1 negatively regulates hepatocellular carcinoma proliferation via regulating STAT1
  • plays an important role in driving centrosomal assembly and maintenance, mitotic spindle proper organization, and ultimately a correct cell division
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
  • integral constituent of centrosomes
  • INTERACTION
    DNA
    RNA
    small molecule
    protein
  • binds to elongation factor EEF1A1 and interferes in protein synthesis
  • calcium modulating cyclophilin ligand CAMLG/CAML as a binding partner
  • ER membrane proteins, ERLIN2 and TMUB1, are associated proteins of mammalian AMFR, a membrane-bound ubiquitin ligase that mediates sterol-accelerated ERAD of the cholesterol biosynthetic enzyme HMGCR
  • TMUB1 plays a negative role in IL6-induced hepatocyte proliferation, indicating that the interaction between TMUB1 and CAMLG may mediate the function of TMUB1 in hepatocytes
  • TMUB1 acts as a functional bridge in NPM1-CDKN2A interactions
  • CEBPB is a key transcription factor, which can positively regulate the expression of TMUB1 during liver cell proliferation through a possible association with IL6
  • TMUB1 interacting with CAMLg and further interfering with the binding of CAMLG to cyclophilin B to decrease cellular [Ca2+]i
  • STAT3 binds to and activates the promoter of TMUB1, suggesting a putative negative feedback loop between TMUB1 and STAT3 signaling
  • promotes the TP53-dependent mitochondrial apoptosis pathway by preserving cytoplasmic TP53 from both degradation and nuclear uptake
  • causes cell cycle arrest in G0/G1 phase, an event associated to stabilization of CDKN2A, an important tumor suppressor protein
  • function of TMUB1 as a novel modulator of TRAF6, regulating inflammatory responses driven by activation of the NFKB1 signaling pathway
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional     --over  
    during liver regeneration
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target overexpression in H-35-hepatoma and 3T3-NIH cells strongly reduces proliferation
    ANIMAL & CELL MODELS
  • Hops-/- mice are viable with no apparent phenotypic defects