Warning: This is a preliminary report that has not been peer-reviewed. It should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information.

Angiotensin converting enzyme 2 is a novel target of the secretase complex (Preliminary Report)

Angiotensin converting enzyme 2 (ACE2) is a key regulator of the renin-angiotensin system, but also the functional receptor of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Based on structural similarity with other {gamma}-secretase ({gamma}S) targets, we hypothesized that ACE2 may be affected by {gamma}S proteolytic activity. We found that ...
after ectodomain shedding, ACE2 is targeted for intramembrane proteolysis by {gamma}S, releasing a soluble ACE2 C-terminal fragment. Consistently, chemical or genetic inhibition of {gamma}S results in the accumulation of a membrane-bound fragment of ectodomain-deficient ACE2. Although chemical inhibition of {gamma}S does not alter SARS-CoV-2 cell entry, these data point to a novel pathway for cellular ACE2 trafficking.
Date: Sep. 03, 2020
Status: Preliminary Report