Preparing your results

Our searching services are busy right now. Your search will reload in five seconds.

X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

Amyloid beta protein precursor is phosphorylated by JNK-1 independent of, yet facilitated by, JNK-interacting protein (JIP)-1.

http://www.ncbi.nlm.nih.gov/pubmed/12917434

Alzheimer's disease (AD) is genetically linked to the processing of amyloid beta protein precursor (AbetaPP). Aside from being the precursor of the amyloid beta (Abeta) found in plaques in the brains of patients with AD, little is known regarding the functional role of AbetaPP. We have recently reported biochemical evidence linking AbetaPP to the JNK signaling cascade by finding that JNK-interacting protein-1 (JIP-1) binds AbetaPP. In order to study the functional implications of this interaction we assayed the carboxyl-terminal of AbetaPP for phosphorylation. We found that the threonine 668 within the AbetaPP intracellular domain (AID or elsewhere AICD) is indeed phosphorylated by JNK1. We surprisingly found that although JIP-1 can facilitate this phosphorylation, it is not required for this process. We also found that JIP-1 only facilitated phosphorylation of AbetaPP but not of the two other family members APLP1 (amyloid precursor-like protein 1) and APLP2. Understanding the connection between AbetaPP phosphorylation and the JNK signaling pathway, which mediates cell response to stress may have important implications in understanding the pathogenesis of Alzheimer's disease.

Pubmed ID: 12917434 RIS Download

Mesh terms: Adaptor Proteins, Signal Transducing | Amyloid beta-Protein Precursor | Carrier Proteins | Cell Line | Cytoplasm | Humans | Mitogen-Activated Protein Kinase 8 | Mitogen-Activated Protein Kinases | Nerve Tissue Proteins | Phosphorylation | Protein Binding | Protein Structure, Tertiary | Signal Transduction | Threonine | Transfection

Research resources used in this publication

None found

Research tools detected in this publication

None found

Data used in this publication

None found

Associated grants

  • Agency: NIGMS NIH HHS, Id: T32 GM 07288

Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.