Neuron‐Specific Phosphorylation of Alzheimer's β‐Amyloid Precursor Protein by Cyclin‐Dependent Kinase 5
Authors:
- Ko‐Ichi IijimaKIKo‐Ichi Iijima
- Kanae AndoKAKanae Ando
- Shizu TakedaSTShizu Takeda
- Yasushi SatohYSYasushi Satoh
- Tatsunori SekiTSTatsunori Seki
- Shigeyoshi ItoharaSIShigeyoshi Itohara
- Paul GreengardPGPaul Greengard
- Yutaka KirinoYKYutaka Kirino
- Angus C. NairnANAngus C. Nairn
- Toshiharu SuzukiTSToshiharu Suzuki
- 1 September 2000
- journal article
- research article
- Published by Wiley in Journal of Neurochemistry
- Vol. 75 (3) , 1085-1091
Abstract
The mature form of Alzheimer's β‐amyloid precursor protein (APP) is phosphorylated specifically at Thr668 in neurons. In mature neurons, phosphorylated APP is detected in neurites, with dephosphorylated APP being found mostly in the cell body. In vitro, active cyclin‐dependent kinase 5 (Cdk5) phosphorylated the cytoplasmic domain of APP at Thr668. Treatment of mature neurons with an antisense oligonucleotide to Cdk5 suppressed Cdk5 expression and significantly diminished the level of phosphorylated APP. The expression of APP was unaffected in antisense‐treated neurons. These results indicate that in neurons APP is phosphorylated by Cdk5, and that this may play a role in its localization.Keywords
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