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MDA5 - filament, dynamics and disease #MMPMID25676875
Duany Ydel T; Wu B; Hur S
Curr Opin Virol 2015[Jun]; 12 (ä): 20-5 PMID25676875show ga
Melanoma Differentiation-Associated gene 5 (MDA5), encoded by the gene IFIH1, is a cytoplasmic sensor for viral double-stranded RNAs (dsRNAs). MDA5 activates the type I interferon signaling pathway upon detection of long viral dsRNA generated during replication of picornaviruses. Studies have shown that MDA5 forms a filament along the length of dsRNA and utilizes ATP-dependent filament dynamics to discriminate between self vs non-self on the basis of dsRNA length. This review summarizes our current understanding of how the MDA5 filament assembles and disassembles, how this filament dynamics are utilized in dsRNA length-dependent signaling, and how dysregulated filament dynamics lead to pathogenesis of immune disorders.