Two endoplasmic reticulum (ER)/ER Golgi intermediate compartment-based lysine acetyltransferases post-translationally regulate BACE1 levels.

ABSTRACT: We have recently identified a novel form of post-translational regulation of BACE1 (beta-site amyloid precursor protein-cleaving enzyme 1), a membrane protein that acts as the rate-limiting enzyme in the generation of the Alzheimer disease amyloid beta-peptide. Specifically, nascent BACE1 is transiently acetylated in seven lysine residues clustered in a highly disordered region of the protein that faces the lumen of the endoplasmic reticulum (ER)/ER Golgi intermediate compartment (ER/ERGIC). The acetylation protects the nascent protein from degradation by PCSK9/NARC-1 in the ERGIC and allows it to reach the Golgi apparatus. Here we report the identification of two ER/ERGIC-based acetyltransferases, ATase1 and ATase2. Both proteins display acetyl-CoA:lysine acetyltransferase activity, can i

SUBMITTER: Ko MH 

PROVIDER: S-EPMC2629114 | biostudies-literature | 2009 Jan

REPOSITORIES: biostudies-literature