Recombinant Human Membrane-bound transcription factor site-1 protease(MBTPS1),partial

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Code CSB-EP617930HU
Size US$2466Purchase it in Cusabio online store
(only available for customers from the US)
  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Product Details

Purity Greater than 90% as determined by SDS-PAGE.
Target Names MBTPS1
Uniprot No. Q14703
Research Area Epigenetics and Nuclear Signaling
Alternative Names MBTPS1; KIAA0091; S1P; SKI1Membrane-bound transcription factor site-1 protease; EC; Endopeptidase S1P; Subtilisin/kexin-isozyme 1; SKI-1
Species Homo sapiens (Human)
Source E.coli
Expression Region 218-414aa
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight 37.5kDa
Protein Length Partial
Tag Info N-terminal 6xHis-SUMO-tagged
Form Liquid or 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 If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is 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°C/-80°C. 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 3-7 business days
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

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Target Background

(From Uniprot)
Serine protease that cleaves after hydrophobic or small residues, provided that Arg or Lys is in position P4: known substrates are SREBF1/SREBP1, SREBF2/SREBP2, BDNF, GNPTAB, ATF6 and ATF6B. Cleaves substrates after Arg-Ser-Val-Leu (SREBP2), Arg-His-Leu-Leu (ATF6), Arg-Gly-Leu-Thr (BDNF) and its own propeptide after Arg-Arg-Leu-Leu. Catalyzes the first step in the proteolytic activation of the sterol regulatory element-binding proteins (SREBPs) SREBF1/SREBP1 and SREBF2/SREBP2. Also mediates the first step in the proteolytic activation of the cyclic AMP-dependent transcription factor ATF-6 (ATF6 and ATF6B). Mediates the protein cleavage of GNPTAB into subunit alpha and beta, thereby participating in biogenesis of lysosomes. Involved in the regulation of M6P-dependent Golgi-to-lysosome trafficking of lysosomal enzymes. It is required for the activation of CREB3L2/BBF2H7, a transcriptional activator of MIA3/TANGO and other genes controlling mega vesicle formation. Therefore, it plays a key role in the regulation of mega vesicle-mediated collagen trafficking.
Gene References into Functions
  1. rs11642644 associated with facial profile PMID: 29301965
  2. In the absence of S1P, the catalytically inactive alpha/beta-subunit precursor of GlcNAc-1-phosphotransferase fails to be activated and results in missorting of newly synthesized lysosomal enzymes, and lysosomal accumulation of non-degraded material, which are biochemical features of defective GlcNAc-1-phosphotransferase subunits and the associated pediatric lysosomal diseases mucolipidosis type II and III. PMID: 28693924
  3. Results suggest that (pro)renin receptor (s(P)RR) is generated by sequential processing by site-1 protease (S1P) and furin protein. PMID: 28013223
  4. primordial SKI-1/S1P likely contained a simpler prodomain consisting of the highly conserved AB fragment that represents an independent folding unit PMID: 26645686
  5. S1P substrate-dependent regulatory mechanisms for lipid synthesis and biogenesis of lysosomes are different PMID: 26108224
  6. The interaction between S1P and C5a plays an important role in neutrophils for antineutrophil cytoplasmic antibody -mediated activation PMID: 25000985
  7. Incompletely matured forms of SKI-1/S1P further process cellular and viral substrates in distinct subcellular compartments. PMID: 25378398
  8. We show that SKI-1 is constitutively expressed in human pigment cells with higher SKI activity in seven out of eight melanoma cell lines compared with normal melanocytes. PMID: 23884247
  9. Diabetic high-density lipoprotein carries higher levels of S1P compared with normal high-density lipoprotein. PMID: 23360427
  10. Y285 of SKI-1 is crucial for the efficient processing of envelope glycoproteins from Old World and clade C New World arenavirus. PMID: 23536681
  11. The role of MBTPS1 (SKI-1/S1P) peptides in cancer and approaches used to inhibit SKI-1/S1P were studied. PMID: 21568902
  12. study found that the N-acetylglucosamine-1-phosphotransferase alpha/beta-subunit precursor is cleaved by S1P that activates sterol regulatory element-binding proteins in response to cholesterol deprivation; S1P functions in the biogenesis of lysosomes PMID: 21719679
  13. S1P has a role in reducing the size of the luminal domain to prepare ATF6 to be an optimal S2P substrate PMID: 15299016
  14. enzymatic activity of S1P is not calcium dependent, but can be modulated by a variety of mono- and divalent cations. S1P displayed pronounced positive cooperativity with a substrate derived from the viral coat glycoprotein of the lassa virus. PMID: 16973377
  15. SKI-1/S1P inhibition resulted in reduced cholesterol synthesis and mRNA levels of the rate-limiting enzymes, HMG-CoA reductase and squalene epoxidase, in the cholesterol synthetic pathway. PMID: 17867930
  16. Complementation of SKI-1/S1P-deficient cells with a SKI-1/S1P expression vector restored release of infectious Crimean-Congo hemorrhagic fever virus (>106 PFU/ml), confirming that SKI-1/S1P processing is required for incorporation of viral glycoproteins. PMID: 17898072
  17. Site 1 protease is required for proteolytic processing of the glycoproteins of the South American hemorrhagic fever viruses Junin, Machupo, and Guanarito. PMID: 18400865

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Subcellular Location Endoplasmic reticulum membrane; Single-pass type I membrane protein. Golgi apparatus membrane; Single-pass type I membrane protein.
Protein Families Peptidase S8 family
Tissue Specificity Widely expressed.
Database Links

HGNC: 15456

OMIM: 603355

KEGG: hsa:8720

STRING: 9606.ENSP00000344223

UniGene: Hs.75890


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