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FLASH GENE
Symbol LITAF contributors: mct - updated : 10-07-2018
HGNC name lipopolysaccharide-induced TNF factor
HGNC id 16841
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • N-terminus containing two PPXY motifs that mediate protein-protein interactions with WW-domain containing proteins
  • a PPXY motif
  • P(S/T)AP motifs
  • a transmembrane domain (TMD) embedded within the cysteine-rich (C-rich) region that anchors LITAF to the membrane
  • C-terminus containing a highly conserved domain termed the SIMPLE-like domain (SLD)
  • both the N- and C-termini of LITAF are exposed to the cytoplasm
  • mono polymer aggregate
    HOMOLOGY
    interspecies homolog to murine Litaf
    homolog to xenopus Xl.21754
    Homologene
    FAMILY
  • RING finger motif-containing subfamily of E3 ubiquitin ligases
  • LITAF family
  • CATEGORY regulatory
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,organelle,membrane
    intracellular,cytoplasm,organelle,Golgi
    intracellular,cytoplasm,organelle,endosome
    intracellular,cytoplasm,organelle,lysosome
    intracellular,cytoplasm,cytosolic
    intracellular,nucleus,nucleoplasm
    text
  • LITAF mutants A111G, G112S, W116G, and T115N mislocalize from the late endosome/lysosome to the mitochondria while the mutants T49M, L122V, and P135T show partial mislocalization with a portion of the total protein present in the late endosome/lysosome and the remainder of the protein localized to the mitochondria
  • basic FUNCTION
  • playing an important role in the regulation of tumor necrosis factor alpha (TNFA)
  • may be clathrin adaptor aiding in the retention of ubiquitinated proteins on to the endosomes
  • E3 ubiquitin ligase playing a role in protein degradation
  • multiple functional molecule whose sequence is identical to the small integral membrane protein of the lysosome/late endosome
  • mediates the effect of AMPK by binding to a specific sequence in the promoter region
  • may function as a tumor suppressor
  • is a post-translationally inserted, C-tail-anchored membrane protein
  • transcription factor that mediates TNF1 expression (
  • LITAF function is not absolutely required for peripheral nerve development and maintenance
  • function of LITAF as a regulator of endosomal trafficking, providing evidence linking dysregulated endosomal trafficking to CMT pathogenesis
  • LITAF traffics through the secretory pathway to the late endosome/lysosome
  • is a novel player in multivesicular bodies (MVBs) regulation
  • is an endosome-associated integral membrane protein important for multivesicular body sorting
  • is a monotopic membrane protein whose membrane integration is stabilised by a zinc finger
  • CELLULAR PROCESS nucleotide, transcription, regulation
    protein, degradation
    protein, ubiquitin dependent proteolysis
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component LITAF forms a complex with human STAT6, which translocates into the nucleus to upregulate cytokine transcription (
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • binding with TNF
  • ITCH, a WW-domain containing protein, and LITAF strongly interact and this interaction depends on the two PPXY motifs in the N-terminus of LITAF
  • LITAF interacted and colocalized with endosomal
  • complex required for transport (ESCRT) components STAM, HGS, and TSG101 on early endosomes and functioned with the ESCRT machinery in the control of endosome-to-lysosome trafficking
  • BCL6-mediated transcriptional repression of LITAF may inhibit autophagy in B cells during the germinal centre reaction sorting
  • TWIST1-binding sequences associated with CHST11, LITAF, ROR2, and SPATA5 also bound the potential TWIST1 cofactor RREB1
  • cell & other
    REGULATION
    activated by AMPK (AMPK activation upregulates the transcription of LITAF)
    induced by by lipopolysaccharides (lps) or TP53
    ASSOCIATED DISORDERS
    corresponding disease(s) CMT1C
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral        
    silenced by promoter hypermethylation in germinal centre-derived B-cell lymphomas
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS