Abstract:The assembly of spliceosomal snRNP cores involves seven Sm proteins (D1/D2/F/E/G/D3/B) forming a ring around each snRNA and typically requires several essential assembly chaperones, particularly the SMN-Gemins complex implicated in spinal muscular atrophy (SMA). Strikingly, in budding yeast, snRNP core assembly only involves Brr1, a nonessential homolog of Gemin2. To unravel this enigma, we systematically investigated snRNP core assembly in budding yeast using biochemical and genetic approaches. We discovered … Show more
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