PCSK9 active protein

PCSK9 Protein, Human, Recombinant (D374Y, His Tag)

Cat. Num. AAA8122130

• Gene Names: PCSK9; FH3; PC9; NARC1; LDLCQ1; NARC-1; HCHOLA3
• Purity: >95% as determined by SDS-PAGE
• Synonyms: PCSK9; PCSK9 Protein; Human; Recombinant (D374Y; His Tag); Human PCSK9/NARC1 (D374Y) Protein (His Tag); FH3 Protein; HCHOLA3 Protein; LDLCQ1 Protein; NARC-1 Protein; NARC1 Protein; PC9 Protein; proprotein convertase subtilisin/kexin type 9; PCSK9 active protein

• Host: HEK293 Cells
• Purity/Purification: >95% as determined by SDS-PAGE
• Form/Format: Lyophilized from sterile PBS, pH7.4. Normally 5%-8% trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA.
• Sequence: Met1-Gln692

• Species: Human
• Endotoxin: <1.0EU per ug protein as determined by the LAL method.
• Predicted N Terminal: Gln 31
• Tag: C-His
• Protein Construction: A DNA sequence encoding the human PCSK9 (NP_777596.2, with mutation Asp 374 Tyr)(Met1-Gln692) was expressed with a polyhistidine tag at the C-terminus.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
• Activity: Measured by its binding ability in a functional ELISA. Immobilized Human LDLR mFc at 2ug/ml (100uL/well) can bind Human PCSK9(D374Y) His. The EC50 of PCSK9 (D374Y) His is 1-20ng/mL.
• Preparation and Storage: Samples are stable for up to twelve months from date of receipt at -20 degree C to -80 degree C. Store it under sterile conditions at -20 degree C to -80 degree C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.; In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature. Bulk packages of recombinant proteins are provided as frozen liquid.; They are shipped out with blue ice.

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Related Product Information for PCSK9 active protein

Background: Proprotein convertase subtilisin/kexin type 9 (PCSK9), also known as NARC1 (neural apoptosis regulated convertase), which is a newly identified human secretory subtilase belonging to the proteinase K subfamily of the secretory subtilase family. PCSK9 protein is an enzyme which in humans is encoded by the PCSK9 gene with orthologs found across many species. It is expressed in neuroepithelioma, colon carcinoma, hepatic and pancreatic cell lines, and in Schwann cells. PCSK9 protein is highly expressed in the liver and regulates low density lipoprotein receptor (LDLR) protein levels. Inhibition of PCSK9 protein function is currently being explored as a means of lowering cholesterol levels. Thereby, PCSK9 protein is regarded as a new strategy to treat hypercholesterolemia. PCSK9 protein contributes to cholesterol homeostasis and may have a role in the differentiation of cortical neurons.

Product Categories/Family for PCSK9 active protein

Serine Proteases and Regulators

References

Sseidah, N.G. et al., 2003, Proc. Natl. Acad. Sci. USA. 100: 928-933. Beyer, T.P. et al., 2007, J. Lipid. Res. 48: 1488-1498 Shan, L. et al., 2008, Biochem. Biophys. Res. Commun. 375: 69-73. Benjannet, S. et al., 2005, J. Biol. Chem. 279: 48865-48875. Abifadel, M. et al., 2003, Nat. Genet. 34: 154-156.

NCBI and Uniprot Product Information

• NCBI GI #: 31317307
• NCBI GeneID: 255738
• NCBI Accession #: NP_777596.2
• NCBI GenBank Nucleotide #: NM_174936.3
• UniProt Accession #: Q8NBP7; Q5PSM5; Q5SZQ2; A8T640; C0JYY9
• Molecular Weight: 74,286 Da
• NCBI Official Full Name: proprotein convertase subtilisin/kexin type 9 preproprotein
• NCBI Official Synonym Full Names: proprotein convertase subtilisin/kexin type 9
• NCBI Official Symbol: PCSK9
• NCBI Official Synonym Symbols: FH3; PC9; NARC1; LDLCQ1; NARC-1; HCHOLA3
• NCBI Protein Information: proprotein convertase subtilisin/kexin type 9; subtilisin/kexin-like protease PC9; neural apoptosis regulated convertase 1; convertase subtilisin/kexin type 9 preproprotein
• UniProt Protein Name: Proprotein convertase subtilisin/kexin type 9
• Protein Family: Proprotein convertase subtilisin/kexin
• UniProt Gene Name: PCSK9
• UniProt Synonym Gene Names: NARC1; NARC-1; PC9
• UniProt Entry Name: PCSK9_HUMAN

NCBI Description

This gene encodes a proprotein convertase belonging to the proteinase K subfamily of the secretory subtilase family. The encoded protein is synthesized as a soluble zymogen that undergoes autocatalytic intramolecular processing in the endoplasmic reticulum. The protein may function as a proprotein convertase. This protein plays a role in cholesterol homeostasis and may have a role in the differentiation of cortical neurons. Mutations in this gene have been associated with a third form of autosomal dominant familial hypercholesterolemia (HCHOLA3). [provided by RefSeq, Jul 2008]

Uniprot Description

PCSK9: Crucial player in the regulation of plasma cholesterol homeostasis. Binds to low-density lipid receptor family members: low density lipoprotein receptor (LDLR), very low density lipoprotein receptor (VLDLR), apolipoprotein E receptor (LRP1/APOER) and apolipoprotein receptor 2 (LRP8/APOER2), and promotes their degradation in intracellular acidic compartments. Acts via a non-proteolytic mechanism to enhance the degradation of the hepatic LDLR through a clathrin LDLRAP1/ARH-mediated pathway. May prevent the recycling of LDLR from endosomes to the cell surface or direct it to lysosomes for degradation. Can induce ubiquitination of LDLR leading to its subsequent degradation. Inhibits intracellular degradation of APOB via the autophagosome/lysosome pathway in a LDLR-independent manner. Involved in the disposal of non-acetylated intermediates of BACE1 in the early secretory pathway. Inhibits epithelial Na(+) channel (ENaC)-mediated Na(+) absorption by reducing ENaC surface expression primarily by increasing its proteasomal degradation. Regulates neuronal apoptosis via modulation of LRP8/APOER2 levels and related anti-apoptotic signaling pathways. Defects in PCSK9 are the cause of hypercholesterolemia autosomal dominant type 3 (HCHOLA3). A familial condition characterized by elevated circulating cholesterol contained in either low-density lipoproteins alone or also in very-low-density lipoproteins. Belongs to the peptidase S8 family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 3.4.21.-; Secreted; Protease; Secreted, signal peptide; Cell development/differentiation

Chromosomal Location of Human Ortholog: 1p32.3

Cellular Component: Golgi apparatus; extracellular space; cell surface; extrinsic to external side of plasma membrane; rough endoplasmic reticulum; endoplasmic reticulum; lysosome; perinuclear region of cytoplasm; early endosome; cytoplasm; late endosome; plasma membrane; ER to Golgi transport vesicle

Molecular Function: sodium channel inhibitor activity; very-low-density lipoprotein binding; protein binding; protein self-association; low-density lipoprotein receptor binding; serine-type endopeptidase activity; low-density lipoprotein binding; apolipoprotein binding; apolipoprotein receptor binding

Biological Process: cholesterol metabolic process; lysosomal transport; apoptosis; positive regulation of receptor internalization; lipoprotein metabolic process; regulation of low-density lipoprotein receptor catabolic process; proteolysis; liver development; cellular response to starvation; neuron differentiation; protein autoprocessing; cholesterol homeostasis; triacylglycerol metabolic process; cellular response to insulin stimulus; neurogenesis; phospholipid metabolic process; positive regulation of neuron apoptosis; regulation of neuron apoptosis; negative regulation of receptor recycling; low-density lipoprotein receptor catabolic process; regulation of receptor activity; kidney development

Disease: Hypercholesterolemia, Autosomal Dominant, 3