We discovered that dimerization of the APP trans-membrane sequence is mediated by glycine residues G29 and G33 of the three consecutive GxxxG motifs promoting helix-helix interactions. Mutations at the glycine positions attenuate the TMS dimerization strength and specifically reduce generation of Aß42. The level of reduced Aß42 is counterbalanced by increased Aß38, whereas the level of Aß40 remains unaffected.
Technology
We offer a novel assay for the diagnosis of early and late stages of Alzheimer’s Disease. The assay is very easy to use and allows a rapid and reliable detection of Aß38:Aß42. The ratio is used to make the diagnosis.
IP Rights
European Patent application was filed in June 2006.
PCT application was filed in April 2007.
Patent applications were filed in US, JP, IN, CN, CA, FR, GB, IT, ES, DE.
Origin
Freie Universität Berlin