Product: Presenilin 1 Antibody
Catalog: AF0245
Description: Rabbit polyclonal antibody to Presenilin 1
Application: WB IHC IF/ICC
Reactivity: Human, Mouse
Prediction: Rat, Horse, Rabbit, Chicken, Xenopus
Mol.Wt.: 60kDa; 53kD(Calculated).
Uniprot: P49768
RRID: AB_2833420

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 100ul $280 In stock
 200ul $350 In stock

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Product Info

WB 1:500-1:3000, IHC 1:50-1:200, IF/ICC 1:100-1:500
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Rat(%), Horse(89%), Rabbit(89%), Chicken(100%), Xenopus(88%)
Presenilin 1 Antibody detects endogenous levels of total Presenilin 1.
Cite Format: Affinity Biosciences Cat# AF0245, RRID:AB_2833420.
The antiserum was purified by peptide affinity chromatography using SulfoLink™ Coupling Resin (Thermo Fisher Scientific).
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


AD3; Ad3h; FAD; Homo Sapiens Clone CC44 Senilin 1; Presenilin-1 CTF12; Protein S182; PS 1; PS-1; PS1-CTF12; PSEN1; PSN1_HUMAN; PSNL1; S182;


P49768 PSN1_HUMAN:

Detected in azurophile granules in neutrophils and in platelet cytoplasmic granules (at protein level) (PubMed:11987239). Expressed in a wide range of tissues including various regions of the brain, liver, spleen and lymph nodes (PubMed:7596406, PubMed:8641442, PubMed:8574969).

PSEN1 probable catalytic subunit of the gamma-secretase complex, an endoprotease complex that catalyzes the intramembrane cleavage of integral membrane proteins such as Notch receptors and APP (beta-amyloid precursor protein). Requires the other members of the gamma-secretase complex to have a protease activity. May play a role in intracellular signaling and gene expression or in linking chromatin to the nuclear membrane. Regulates epithelial- cadherin function.



Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - P49768 As Substrate

Site PTM Type Enzyme
S43 Phosphorylation
S51 Phosphorylation
S59 Phosphorylation
T74 Phosphorylation
K76 Ubiquitination
S102 Phosphorylation
S104 Phosphorylation
K109 Ubiquitination
Y154 Phosphorylation
Y240 Phosphorylation
Y256 Phosphorylation
S310 Phosphorylation
S313 Phosphorylation
K314 Ubiquitination
S319 Phosphorylation P45984 (MAPK9)
T320 Phosphorylation P45984 (MAPK9)
S324 Phosphorylation
S346 Phosphorylation P05129 (PRKCG) , Q05513 (PRKCZ) , P17252 (PRKCA) , P05771 (PRKCB)
S353 Phosphorylation P49841 (GSK3B)
T354 Phosphorylation Q00535 (CDK5) , Q13627 (DYRK1A)
S357 Phosphorylation P49841 (GSK3B)
S365 Phosphorylation
S366 Phosphorylation
S367 Phosphorylation

Research Backgrounds


Catalytic subunit of the gamma-secretase complex, an endoprotease complex that catalyzes the intramembrane cleavage of integral membrane proteins such as Notch receptors and APP (amyloid-beta precursor protein). Requires the presence of the other members of the gamma-secretase complex for protease activity. Plays a role in Notch and Wnt signaling cascades and regulation of downstream processes via its role in processing key regulatory proteins, and by regulating cytosolic CTNNB1 levels. Stimulates cell-cell adhesion via its interaction with CDH1; this stabilizes the complexes between CDH1 (E-cadherin) and its interaction partners CTNNB1 (beta-catenin), CTNND1 and JUP (gamma-catenin). Under conditions of apoptosis or calcium influx, cleaves CDH1. This promotes the disassembly of the complexes between CDH1 and CTNND1, JUP and CTNNB1, increases the pool of cytoplasmic CTNNB1, and thereby negatively regulates Wnt signaling. Required for normal embryonic brain and skeleton development, and for normal angiogenesis (By similarity). Mediates the proteolytic cleavage of EphB2/CTF1 into EphB2/CTF2. The holoprotein functions as a calcium-leak channel that allows the passive movement of calcium from endoplasmic reticulum to cytosol and is therefore involved in calcium homeostasis. Involved in the regulation of neurite outgrowth. Is a regulator of presynaptic facilitation, spike transmission and synaptic vesicles replenishment in a process that depends on gamma-secretase activity. It acts through the control of SYT7 presynaptic expression (By similarity).


Heterogeneous proteolytic processing generates N-terminal (NTF) and C-terminal (CTF) fragments of approximately 35 and 20 kDa, respectively. During apoptosis, the C-terminal fragment (CTF) is further cleaved by caspase-3 to produce the fragment, PS1-CTF12.

After endoproteolysis, the C-terminal fragment (CTF) is phosphorylated on serine residues by PKA and/or PKC. Phosphorylation on Ser-346 inhibits endoproteolysis.

Subcellular Location:

Endoplasmic reticulum. Endoplasmic reticulum membrane>Multi-pass membrane protein. Golgi apparatus membrane>Multi-pass membrane protein. Cytoplasmic granule. Cell membrane>Multi-pass membrane protein. Cell projection>Growth cone. Early endosome. Early endosome membrane>Multi-pass membrane protein. Cell projection>Neuron projection. Cell projection>Axon. Cell junction>Synapse.
Note: Translocates with bound NOTCH1 from the endoplasmic reticulum and/or Golgi to the cell surface (PubMed:10593990). Colocalizes with CDH1/2 at sites of cell-cell contact. Colocalizes with CTNNB1 in the endoplasmic reticulum and the proximity of the plasma membrane (PubMed:9738936). Also present in azurophil granules of neutrophils (PubMed:11987239). Colocalizes with UBQLN1 in the cell membrane and in cytoplasmic juxtanuclear structures called aggresomes (PubMed:21143716).

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Detected in azurophile granules in neutrophils and in platelet cytoplasmic granules (at protein level). Expressed in a wide range of tissues including various regions of the brain, liver, spleen and lymph nodes.

Subunit Structure:

Homodimer. The functional gamma-secretase complex is composed of at least four polypeptides: a presenilin homodimer (PSEN1 or PSEN2), nicastrin (NCSTN), APH1 (APH1A or APH1B) and PEN2. Such minimal complex is sufficient for secretase activity. Other components which are associated with the complex include SLC25A64, SLC5A7, PHB and PSEN1 isoform 3. Predominantly heterodimer of a N-terminal (NTF) and a C-terminal (CTF) endoproteolytical fragment. Associates with proteolytic processed C-terminal fragments C83 and C99 of the amyloid precursor protein (APP) (via transmembrane domain). Associates with NOTCH1 (via transmembrane domain). Associates with cadherin/catenin adhesion complexes through direct binding to CDH1 or CDH2. Interaction with CDH1 stabilizes the complex and stimulates cell-cell aggregation. Interaction with CDH2 is essential for trafficking of CDH2 from the endoplasmic reticulum to the plasma membrane. Interacts with CTNND2, CTNNB1, CTNND1, JUP, HERPUD1, FLNA, FLNB, MTCH1, PKP4 and PARL. Interacts through its N-terminus with isoform 3 of GFAP. Interacts with DOCK3 (By similarity). Interacts with isoform 1 and isoform 3 of UBQLN1.


The PAL motif is required for normal active site conformation.

Substrates, such as NOTCH1 and APP peptides, are bound between PSEN1 transmembrane domains and via the first lumenal loop and the cytoplasmic loop between the sixth and seventh transmembrane domains. Substrate binding causes a conformation change and formation of an intermolecular antiparallel beta-sheet between PSEN1 and its substrates.

Belongs to the peptidase A22A family.

Research Fields

· Environmental Information Processing > Signal transduction > Wnt signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > Notch signaling pathway.   (View pathway)

· Human Diseases > Neurodegenerative diseases > Alzheimer's disease.

· Human Diseases > Infectious diseases: Viral > Human papillomavirus infection.

· Organismal Systems > Nervous system > Neurotrophin signaling pathway.   (View pathway)

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