Presenilin-2 is a protein that (in humans) is encoded by the PSEN2 gene. Alzheimer's disease (AD) patients with an inherited form of the disease carry mutations in the presenilin proteins (PSEN1; PSEN2) or the amyloid precursor protein (APP). These disease-linked mutations result in increased production of the longer form of amyloid-beta (main component of amyloid deposits found in AD brains). Presenilins are postulated to regulate APP processing through their effects on gamma-secretase, an enzyme that cleaves APP. Also, it is thought that the presenilins are involved in the cleavage of the Notch receptor, such that they either directly regulate gamma-secretase activity or themselves are protease enzymes. Two alternative transcripts of PSEN2 have been identified. In melanocytic cells PSEN2 gene expression may be regulated by MITF.
背景文献
1. Barazzuol L et al. Unraveling Presenilin 2 Functions in a Knockout Zebrafish Line to Shed Light into Alzheimer\'s Disease Pathogenesis. Cells. 2023 Jan
2. Nam H et al. Presenilin 2 N141I mutation induces hyperactive immune response through the epigenetic repression of REV-ERBalpha. Nat Commun. 2022 Apr
Western blot analysis of Presenilin 2 / AD5 on different lysates with Rabbit anti-Presenilin 2 / AD5 antibody (HA722243) at 1/1,000 dilution.
Lane 1: HeLa cell lysate (20 µg/Lane) Lane 2: HepG2 cell lysate (20 µg/Lane) Lane 3: A549 cell lysate (20 µg/Lane) Lane 4: 293T cell lysate (20 µg/Lane) Lane 5: SH-SY5Y cell lysate (20 µg/Lane) Lane 6: RAW264.7 cell lysate (20 µg/Lane) Lane 7: Neuro-2a cell lysate (20 µg/Lane) Lane 8: C2C12 cell lysate (20 µg/Lane) Lane 9: NIH/3T3 cell lysate (20 µg/Lane) Lane 10: PC-12 cell lysate (20 µg/Lane) Lane 11: C6 cell lysate (20 µg/Lane) Lane 12: Human brain tissue lysate (40 µg/Lane) Lane 13: Mouse brain tissue lysate (40 µg/Lane) Lane 14: Rat liver tissue lysate (40 µg/Lane)
Predicted band size: 50 kDa Observed band size: 23 kDa
Exposure time: 1 minute; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA722243) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Presenilin 2 / AD5 was immunoprecipitated from 0.2 mg HeLa cell lysate with HA722243 at 2 µg/10 µl beads. Western blot was performed from the immunoprecipitate using HA722243 at 1/1,000 dilution. Anti-Rabbit IgG for IP Nano-secondary antibody (NBI01H) at 1/5,000 dilution was used for 1 hour at room temperature.
Lane 1: HeLa cell lysate (input) Lane 2: HA722243 IP in HeLa cell lysate Lane 3: Rabbit IgG instead of HA722243 in HeLa cell lysate