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@ARTICLE{Papadopoulou:154232,
author = {Papadopoulou, Alkmini and Fluhrer, Regina},
title = {{S}ignaling {F}unctions of {I}ntramembrane
{A}spartyl-{P}roteases.},
journal = {Frontiers in Cardiovascular Medicine},
volume = {7},
issn = {2297-055X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {DZNE-2021-00093},
pages = {591787},
year = {2020},
abstract = {Intramembrane proteolysis is more than a mechanism to
'clean' the membranes from proteins no longer needed. By
non-reversibly modifying transmembrane proteins,
intramembrane cleaving proteases hold key roles in multiple
signaling pathways and often distinguish physiological from
pathological conditions. Signal peptide peptidase (SPP) and
signal peptide peptidase-like proteases (SPPLs) recently
have been associated with multiple functions in the field of
signal transduction. SPP/SPPLs together with presenilins
(PSs) are the only two families of intramembrane cleaving
aspartyl proteases known in mammals. PS1 or PS2 comprise the
catalytic center of the γ-secretase complex, which is
well-studied in the context of Alzheimer's disease. The
mammalian SPP/SPPL family of intramembrane cleaving
proteases consists of five members: SPP and its homologous
proteins SPPL2a, SPPL2b, SPPL2c, and SPPL3. Although these
proteases were discovered due to their homology to PSs, it
became evident in the past two decades that no physiological
functions are shared between these two families. Based on
studies in cell culture models various substrates of
SPP/SPPL proteases have been identified in the past years
and recently-developed mouse lines lacking individual
members of this protease family, will help to further
clarify the physiological functions of these proteases. In
this review we concentrate on signaling roles of mammalian
intramembrane cleaving aspartyl proteases. In particular, we
will highlight the signaling roles of PS via its substrates
NOTCH, VEGF, and others, mainly focusing on its involvement
in vasculature. Delineating also signaling pathways that are
affected and/or controlled by SPP/SPPL proteases. From SPP's
participation in tumor progression and survival, to SPPL3's
regulation of protein glycosylation and SPPL2c's control
over cellular calcium stores, various crossovers between
proteolytic activity of intramembrane proteases and cell
signaling will be described.},
keywords = {GxGD aspartyl proteases (Other) / cellular signaling
(Other) / intramembrane proteolysis (Other) / presenilin
(Other) / signal peptide peptidase (Other) / signal peptide
peptidase-like (Other)},
cin = {AG Fluhrer},
ddc = {610},
cid = {I:(DE-2719)1110000-2},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33381526},
pmc = {pmc:PMC7768045},
doi = {10.3389/fcvm.2020.591787},
url = {https://pub.dzne.de/record/154232},
}