Title : Recognition of the amyloid precursor protein by human γ-secretase
Abstract :
Cleavage of amyloid precursor protein ( APP ) by the intramembrane protease γ-secretase is linked to Alzheimer's disease (AD)
We report an atomic structure of human γ-secretase in complex with a transmembrane ( TM) APP fragment at 2.6-angstrom resolution
The TM helix of APP closely interacts with five surrounding TMs of PS1 (the catalytic subunit of γ-secretase)
A hybrid β sheet, which is formed by a β strand from APP and two β strands from PS1 , guides γ-secretase to the scissile peptide bond of APP between its TM and β strand
Residues at the interface between PS1 and APP are heavily targeted by recurring mutations from AD patients
This structure, together with that of γ-secretase bound to Notch, reveal contrasting features of substrate binding, which may be applied toward the design of substrate-specific inhibitors