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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
Chronic GM2 gangliosidosis type Sandhoff associated with a novel missense HEXB gene mutation causing a double
Massimo Santoro1, Anna Modoni, Mario Sabatelli
1Institute of Neurology, Department of Neuroscience, Catholic University of Sacred Heart, L go A Gemelli 8, Rome, Italy.
Abstract:
We identified a novel c.1556A>G transition in exon 12 of the HEXB gene associated with chronic Sandhoff's disease, changing a conserved aspartic acid to glycine at position 494 of the Hex beta-subunit; moreover, RT-PCR showed aberrant exon 12 skipping, causing a frame-shift and premature stop codon, consequent to the disruption of an exonic splicing enhancer motif by the mutation. These data suggest that the c.1556 A>G transition would affect both HEXB mRNA processing and biochemical properties of the beta-subunit.
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