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SMN in spinal muscular atrophy and snRNP biogenesis Coady TH; Lorson CLWiley Interdiscip Rev RNA 2011[Jul]; 2 (4): 546-64Ribonucleoprotein (RNP) complexes function in nearly every facet of cellular activity. The spliceosome is an essential RNP that accurately identifies introns and catalytically removes the intervening sequences, providing exquisite control of spatial, temporal, and developmental gene expressions. U-snRNPs are the building blocks for the spliceosome. A significant amount of insight into the molecular assembly of these essential particles has recently come from a seemingly unexpected area of research: neurodegeneration. Survival motor neuron (SMN) performs an essential role in the maturation of snRNPs, while the homozygous loss of SMN1 results in the development of spinal muscular atrophy (SMA), a devastating neurodegenerative disease. In this review, the function of SMN is examined within the context of snRNP biogenesis and evidence is examined which suggests that the SMN functional defects in snRNP biogenesis may account for the motor neuron pathology observed in SMA.|Alternative Splicing[MESH]|Axons/metabolism[MESH]|Humans[MESH]|Models, Neurological[MESH]|Muscular Atrophy, Spinal/classification/etiology/*genetics/*metabolism[MESH]|Protein Structure, Tertiary[MESH]|RNA Precursors/genetics/metabolism[MESH]|RNA Splicing[MESH]|Ribonucleoproteins, Small Nuclear/*biosynthesis[MESH]|Survival of Motor Neuron 1 Protein/chemistry/*genetics/*metabolism[MESH]|Survival of Motor Neuron 2 Protein/genetics/metabolism[MESH] |
