Expression of the Anti-amyloidogenic Secretase ADAM10 Is Suppressed by Its 5′-Untranslated Region*
| Autor: | Christian Haass, Sonja Zilow, Claudia Prinzen, Ann-Katrin Ludwig, Dominik Buell, Stefan F. Lichtenthaler, Brigitte Nuscher, Sven Lammich, Falk Fahrenholz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Five prime untranslated region
enzymology [Brain] ADAM10 ADAM10 protein human BACE1-AS genetics [Amyloid Precursor Protein Secretases] genetics [Alzheimer Disease] genetics [ADAM Proteins] Biochemistry Gene Expression Regulation Enzymologic biosynthesis [Membrane Proteins] ADAM10 Protein Alzheimer Disease Chlorocebus aethiops Amyloid precursor protein Protein biosynthesis biosynthesis [Amyloid beta-Peptides] genetics [Amyloid beta-Peptides] Animals Humans Gene Regulation Molecular Biology Sequence Deletion biosynthesis [ADAM Proteins] Amyloid beta-Peptides biology Base Sequence P3 peptide enzymology [Alzheimer Disease] Brain Membrane Proteins Cell Biology Molecular biology Biochemistry of Alzheimer's disease genetics [Membrane Proteins] ADAM Proteins biosynthesis [Amyloid Precursor Protein Secretases] Protein Biosynthesis ddc:540 COS Cells biology.protein Amyloid Precursor Protein Secretases 5' Untranslated Regions Amyloid precursor protein secretase |
| Zdroj: | The journal of biological chemistry 285(21), 15753-15760 (2010). doi:10.1074/jbc.M110.110742 |
| Popis: | Proteolytic processing of the amyloid precursor protein by alpha-secretase prevents formation of the amyloid beta-peptide (Abeta), which is the main constituent of amyloid plaques in brains of Alzheimer disease (AD) patients. alpha-Secretase activity is decreased in AD, and overexpression of the alpha-secretase ADAM10 (a disintegrin and metalloprotease 10) in an AD animal model prevents amyloid pathology. ADAM10 has a 444-nucleotide-long, very GC-rich 5'-untranslated region (5'-UTR) with two upstream open reading frames. Because similar properties of 5'-UTRs are found in transcripts of many genes, which are regulated by translational control mechanisms, we asked whether ADAM10 expression is translationally controlled by its 5'-UTR. We demonstrate that the 5'-UTR of ADAM10 represses the rate of ADAM10 translation. In the absence of the 5'-UTR, we observed a significant increase of ADAM10 protein levels in HEK293 cells, whereas mRNA levels were not changed. Moreover, the 5'-UTR of ADAM10 inhibits translation of a luciferase reporter in an in vitro transcription/translation assay. Successive deletion of the first half of the ADAM10 5'-UTR revealed a striking increase in ADAM10 protein expression in HEK293 cells, suggesting that this part of the 5'-UTR contains inhibitory elements for translation. Moreover, we detect an enhanced alpha-secretase activity and consequently reduced Abeta levels in the conditioned medium of HEK293 cells expressing both amyloid precursor protein and a 5'-UTR-ADAM10 deletion construct lacking the first half of the 5'-UTR. Thus, we provide evidence that the 5'-UTR of ADAM10 may have an important role for post-transcriptional regulation of ADAM10 expression and consequently Abeta production. |
| Databáze: | OpenAIRE |
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