Journal
SCIENCE
Volume 371, Issue 6526, Pages 253-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaw0843
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Funding
- NIH [RF1 AG057409, R01 AG056259, R01 DA048882, R01 NS086890, P30 NS076411, P01 ES016738, DP1 DA041722, R01 AG061845, P30 AG062429, R01 AG018440, P41 GM103533]
- Brain AMP
- Behavior Research Foundation
- Alzheimer's Association
- Michael J. Fox Foundation
- Step Family Foundation
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This study describes mechanistically distinct enzymes that can mediate a series of redox reactions and lead to synapse loss in patients with Alzheimer's disease. These enzymes can form a separate network for aberrant transnitrosylation, which may not be effectively countered by natural selection in the post-reproductive period.
Here we describe mechanistically distinct enzymes (a kinase, a guanosine triphosphatase, and a ubiquitin protein hydrolase) that function in disparate biochemical pathways and can also act in concert to mediate a series of redox reactions. Each enzyme manifests a second, noncanonical function-transnitrosylation-that triggers a pathological biochemical cascade in mouse models and in humans with Alzheimer's disease (AD). The resulting series of transnitrosylation reactions contributes to synapse loss, the major pathological correlate to cognitive decline in AD. We conclude that enzymes with distinct primary reaction mechanisms can form a completely separate network for aberrant transnitrosylation. This network operates in the postreproductive period, so natural selection against such abnormal activity may be decreased.
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