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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Boulianne, G. L. Phillips, J. P. Getzoff, E. D. Hilliker, A. J. Tainer, J. A. Kirby, K. |
| Description | Author Affiliation: Phillips JP ( Department of Molecular Biology and Genetics, University of Guelph, ON Canada.); |
| Abstract | Mutations in Cu/Zn superoxide dismutase (SOD), a hallmark of familial amyotrophic lateral sclerosis (FALS) in humans, are shown here to confer striking neuropathology in Drosophila. Heterozygotes with one wild-type and one deleted SOD allele retain the expected 50% of normal activity for this dimeric enzyme. However, heterozygotes with one wild-type and one missense SOD allele show lesser SOD activities, ranging from 37% for a heterozygote carrying a missense mutation predicted from structural models to destabilize the dimer interface, to an average of 13% for several heterozygotes carrying missense mutations predicted to destabilize the subunit fold. Genetic and biochemical evidence suggests a model of dimer dysequilibrium whereby SOD activity in missense heterozygotes is reduced through entrapment of wild-type subunits into unstable or enzymatically inactive heterodimers. This dramatic impairment of the activity of wild-type subunits in vivo has implications for our understanding of FALS and for possible therapeutic strategies. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 19 |
| Volume Number | 92 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1995-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Amyotrophic Lateral Sclerosis Etiology Drosophila Melanogaster Genetics Mutation Photoreceptor Cells, Invertebrate Pathology Retina Superoxide Dismutase Amino Acid Sequence Animals Enzymology Heterozygote Models, Chemical Models, Molecular Molecular Sequence Data Protein Conformation Sequence Analysis, DNA Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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