Amyloid precursor proteins anchor CPEB to membranes and promote polyadenylation-induced translation

UMMS Affiliation

Graduate School of Biomedical Sciences; Program in Molecular Medicine

Publication Date


Document Type



Life Sciences | Medicine and Health Sciences


The cytoplasmic polyadenylation element (CPE) binding factor, CPEB, is a sequence-specific RNA binding protein that controls polyadenylation-induced translation in germ cells and at postsynaptic sites of neurons. A yeast two-hybrid screen with a mouse brain cDNA library identified the transmembrane amyloid precursor-like protein 1 (APLP1) as a CPEB-interacting factor. CPEB binds the small intracellular domain (ICD) of APLP1 and the related proteins APLP2 and APP. These proteins promote polyadenylation and translation by stimulating Aurora A catalyzed CPEB serine 174 phosphorylation. Surprisingly, CPEB, Maskin, CPSF, and several other factors involved in polyadenylation and translation and CPE-containing RNA are all detected on membranes by cell fractionation and immunoelectron microscopy. Moreover, most of the RNA that undergoes polyadenylation does so in membrane-containing fractions. These data demonstrate a link between cytoplasmic polyadenylation and membrane association and implicate APP family member proteins as anchors for localized mRNA polyadenylation and translation.

DOI of Published Version



Mol Cell Biol. 2005 Dec;25(24):10930-9. Link to article on publisher's site

Journal/Book/Conference Title

Molecular and cellular biology

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Link to article in PubMed

PubMed ID