LITAF
Lipopolysaccharide is a potent stimulator of monocytes and macrophages, causing secretion of tumor necrosis factor-alpha (TNF-alpha) and other inflammatory mediators. This gene encodes lipopolysaccharide-induced TNF-alpha factor, which is a DNA-binding protein and can mediate the TNF-alpha expression by direct binding to the promoter region of the TNF-alpha gene. The transcription of this gene is induced by tumor suppresor p53 and has been implicated in the p53-induced apoptotic pathway. Mutations in this gene cause Charcot-Marie-Tooth disease type 1C (CMT1C) and may be involved in the carcinogenesis of extramammary Paget's disease (EMPD). Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq]
Function
Plays a role in endosomal protein trafficking and in targeting proteins for lysosomal degradation (PubMed:23166352).
Plays a role in targeting endocytosed EGFR and ERGG3 for lysosomal degradation, and thereby helps down-regulate downstream signaling cascades (PubMed:23166352).
Helps recruit the ESCRT complex components TSG101, HGS and STAM to cytoplasmic membranes (PubMed:23166352).
Probably plays a role in regulating protein degradation via its interaction with NEDD4 (PubMed:15776429).
May also contribute to the regulation of gene expression in the nucleus (PubMed:10200294, PubMed:15793005).
Binds DNA (in vitro) and may play a synergistic role with STAT6 in the nucleus in regulating the expression of various cytokines (PubMed:15793005).
May regulate the expression of numerous cytokines, such as TNF, CCL2, CCL5, CXCL1, IL1A and IL10 (PubMed:10200294, PubMed:15793005).
Biological Process
Cellular response to lipopolysaccharideIEA:Ensembl
Negative regulation of NIK/NF-kappaB signalingIEA:Ensembl
Positive regulation of I-kappaB kinase/NF-kappaB signalingManual Assertion Based On ExperimentHMP:UniProtKB
Positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIMP:NTNU_SB
Regulation of cytokine productionManual Assertion Based On ExperimentIBA:GO_Central
Cellular Location
Cytoplasm
Nucleus
Lysosome membrane
Early endosome membrane
Late endosome membrane
Endosome membrane
Cell membrane
Golgi apparatus membrane
Associated with membranes of lysosomes, early and late endosomes (PubMed:11274176, PubMed:27927196, PubMed:27582497).
Can translocate from the cytoplasm into the nucleus (PubMed:15793005).
Detected at Schmidt-Lanterman incisures and in nodal regions of myelinating Schwann cells (By similarity).
Involvement in disease
Charcot-Marie-Tooth disease 1C (CMT1C):
A dominant demyelinating form of Charcot-Marie-Tooth disease, a disorder of the peripheral nervous system, characterized by progressive weakness and atrophy, initially of the peroneal muscles and later of the distal muscles of the arms. Charcot-Marie-Tooth disease is classified in two main groups on the basis of electrophysiologic properties and histopathology: primary peripheral demyelinating neuropathies (designated CMT1 when they are dominantly inherited) and primary peripheral axonal neuropathies (CMT2). Demyelinating neuropathies are characterized by severely reduced nerve conduction velocities (less than 38 m/sec), segmental demyelination and remyelination with onion bulb formations on nerve biopsy, slowly progressive distal muscle atrophy and weakness, absent deep tendon reflexes, and hollow feet.
Defects in LITAF may be involved in extramammary Paget disease (EMPD) carcinogenesis. EMPD is a cancerous disease representing about 8% of all malignant skin cancers; it usually appears in the anogenital area and can be fatal by metastasizing to internal organs when left untreated for a long time. The clinical features are usually those of eczematous eruptions with weeping and crust formation.
PTM
Phosphorylated on tyrosine residues in response to EGF.