NCIt definition : Presenilin-1 (467 aa, 53 kDa) is encoded by the human PSEN1 gene. This protein plays
a role in the mediation of proteolysis.;
NCIt note : Presenilin-1 is autocatalytically processed to an amino terminal fragment (NTF) and
a carboxyl terminal fragment (CTF). The NTF and CTF are maintained as a disulfide-linked
heterodimer. This cleavage is required for gamma secretase activity.;