Recombinant Human Gamma-secretase subunit APH-1B(APH1B),partial

Code CSB-YP819900HU1
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Source Yeast
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Code CSB-EP819900HU1
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Source E.coli
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Code CSB-EP819900HU1-B
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP819900HU1
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Source Baculovirus
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Code CSB-MP819900HU1
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Source Mammalian cell
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Product Details

Purity >85% (SDS-PAGE)
Target Names APH1B
Uniprot No. Q8WW43
Alternative Names APH1B; PSFL; UNQ688/PRO1328; Gamma-secretase subunit APH-1B; APH-1b; Aph-1beta; Presenilin-stabilization factor-like
Species Homo sapiens (Human)
Protein Length Partial
Tag Info The following tags are available.
N-terminal His-tagged
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Form Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization Tris/PBS-based buffer, 6% Trehalose, pH 8.0
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet Please contact us to get it.

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Target Background

Probable subunit of the gamma-secretase complex, an endoprotease complex that catalyzes the intramembrane cleavage of integral proteins such as Notch receptors and APP (amyloid-beta precursor protein). It probably represents a stabilizing cofactor for the presenilin homodimer that promotes the formation of a stable complex. Probably present in a minority of gamma-secretase complexes compared to APH1A.
Gene References into Functions
  1. Data show that presenilin 1 (PS1)/anterior-pharynx-defective protein 1 (Aph1b), presenilin 2 (PS2)/Aph1aL, PS2/Aph1aS and PS2/anterior pharynx defective 1 homolog B (Aph1b) gamma-secretase produced amyloid beta peptide (Abeta) with a higher Abeta42+Abeta43-to-Abeta40 (Abeta42(43)/Abeta40) ratio than the other gamma-secretases. PMID: 27608597
  2. gamma-Secretase inhibition during repeated peripheral inflammation blocks central amyloid-beta accumulation and prevents cognitive dysfunction. PMID: 23665252
  3. Expression of APH-1b increases amyloid beta peptide levels and gamma-secretase activity. PMID: 12763021
  4. both APH-1a splice forms and APH-1b are expressed in peripheral and neuronal cells. APH-1aS, APH-1aL, and APH-1b form separate, proteolytically active gamma-secretase complexes containing either one of the two presenilins. PMID: 15286082
  5. dimeric (NCSTN/APH-1) and trimeric (NCSTN/APH-1/PS1) intermediates of gamma-secretase complex assembly are retained within the ER and incorporation of the fourth binding partner (PEN-2) also occurs on immature NCSTN (APH-1) PMID: 15591316
  6. knock down of APH-1a, but not APH-1b, resulted in impaired maturation of nicastrin and reduced expression of presenilin 1, presenilin 2, and PEN-2 proteins PMID: 15629423
  7. APH-1b variant protein is destabilized, and the fourth transmembrane domain plays an important role in the protein stability and function of APH-1. PMID: 15823552
  8. These results collectively indicate that the three forms of APH-1 can replace each other in presenilin (PS) complexes and that the transmembrane GxxxG region is essential for the stability of the APH-1 protein as well as the assembly of PS complexes. PMID: 16757808
  9. These data suggest that a cooperative mechanism involving APOE and APH-1b plays a role in the susceptibility to develop AD. PMID: 17466415
  10. A non-synonymous SNP in the gamma-secretase component APH1B (Phe217Leu; rs1047552)is significantly associated with premature coronary atherosclerosis in Dutch males. PMID: 18987747
  11. The single-nucleotide polymorphism (Phe217Leu; rs1047552) showed a tendency for association with HIV-1 infection in a Xhosa indigenous South African Bantu study (P = 0.087), and associated significantly in a Caucasian Dutch study (P = 0.049). PMID: 19774691

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Subcellular Location Membrane; Multi-pass membrane protein.
Protein Families APH-1 family
Tissue Specificity Weakly or not expressed in leukocytes, lung, placenta, small intestine, liver, kidney, spleen thymus, colon, skeletal muscle, heart and brain.
Database Links

HGNC: 24080

OMIM: 607630

KEGG: hsa:83464

STRING: 9606.ENSP00000261879

UniGene: Hs.511703

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