Q80W65.2
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
74,823 Da
NCBI Official Full Name
Proprotein convertase subtilisin/kexin type 9
NCBI Official Synonym Full Names
proprotein convertase subtilisin/kexin type 9
NCBI Official Synonym Symbols
FH3; PC9; Narc1; HCHOLA3; AI415265; AI747682 [Similar Products]
NCBI Protein Information
proprotein convertase subtilisin/kexin type 9; NARC-1; proprotein convertase 9; proprotein convertase PC9; subtilisin/kexin-like protease PC9; neural apoptosis regulated convertase 1; neural apoptosis-regulated convertase 1
UniProt Protein Name
Proprotein convertase subtilisin/kexin type 9
UniProt Synonym Protein Names
Neural apoptosis-regulated convertase 1; NARC-1; Proprotein convertase 9; PC9; Subtilisin/kexin-like protease PC9
UniProt Synonym Gene Names
UniProt Entry Name
PCSK9_MOUSE
UniProt Comments for PCSK9
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: Cell development/differentiation; EC 3.4.21.-; Protease; Secreted; Secreted, signal peptide
Cellular Component: Golgi apparatus; extracellular space; cell surface; rough endoplasmic reticulum; endoplasmic reticulum; lysosome; early endosome; extracellular region; ER to Golgi transport vesicle; perinuclear region of cytoplasm; cytoplasm; late endosome; plasma membrane; endosome
Molecular Function: peptidase activity; sodium channel inhibitor activity; very-low-density lipoprotein binding; protein self-association; hydrolase activity; low-density lipoprotein receptor binding; serine-type peptidase activity; serine-type endopeptidase activity; low-density lipoprotein binding; apolipoprotein binding; apolipoprotein receptor binding
Biological Process: steroid metabolic process; cholesterol metabolic process; lysosomal transport; apoptosis; positive regulation of receptor internalization; lipoprotein metabolic process; regulation of low-density lipoprotein receptor catabolic process; cellular response to starvation; proteolysis; neuron differentiation; protein autoprocessing; cholesterol homeostasis; triacylglycerol metabolic process; cellular response to insulin stimulus; phospholipid metabolic process; positive regulation of neuron apoptosis; regulation of neuron apoptosis; negative regulation of receptor recycling; low-density lipoprotein receptor catabolic process; protein processing; regulation of receptor activity; lipid metabolic process; low-density lipoprotein receptor metabolic process
Research Articles on PCSK9
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Organs/Tissues associated with PCSK9 elisa kit
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