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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
A novel arylsulfatase A protein variant and genotype in two patients with major depression
M H Ricketts1, J D Amsterdam, D S Park
1Department of Psychiatry, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway 08854, USA.
Abstract:
A new, 'diffuse, multiple banding', electrophoretic variant of arylsulfatase A protein was found in two patients with major depression. Protein analyses showed that this variant and the normal enzyme differed in amino acid sequence and/or post-translational modifications unrelated to phosphate groups and oligomannose glycans. Analysis of the arylsulfatase A genes from a subject with the new variant identified three mutations; one gene had the two mutations associated with arylsulfatase A pseudodeficiency, and the other had a G to T transversion which changes a tryptophan to cysteine in the protein. These mutations result in an arylsulfatase A protein heteromer with diffuse electrophoretic banding. The possible association of these mutations with major depression is discussed.
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