Human Proprotein Convertase 9/PCSK9 Antibody Summary
Accession # Q8NBP7
This antibody functions as an ELISA capture antibody when paired with Sheep Anti-Human Proprotein Convertase 9/PCSK9 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3888).
This product is intended for assay development on various assay platforms requiring antibody pairs. We recommend the Human Proprotein Convertase 9/PCSK9 DuoSet ELISA Kit (Catalog # DY3888) for convenient development of a sandwich ELISA or the Human Proprotein Convertase 9/PCSK9 Quantikine ELISA Kit (Catalog # DPC900) for a complete optimized ELISA.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Human Proprotein Convertase 9/PCSK9 ELISA Standard Curve. Recombinant Human Proprotein Convertase 9/PCSK9 protein was serially diluted 2-fold and captured by Rat Anti-Human Proprotein Convertase 9/PCSK9 Monoclonal Antibody (Catalog # MAB38883) coated on a Clear Polystyrene Microplate (Catalog # DY990). Sheep Anti-Human Proprotein Convertase 9/PCSK9 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3888) was biotinylated and incubated with the protein captured on the plate. Detection of the standard curve was achieved by incubating Streptavidin-HRP (Catalog # DY998) followed by Substrate Solution (Catalog # DY999) and stopping the enzymatic reaction with Stop Solution (Catalog # DY994).
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Proprotein Convertase 9/PCSK9
The human PCSK9 gene encodes Proprotein Convertase 9 (PC9), which is also known as Neural Apoptosis Regulated Convertase 1 (NARC1) (1). The deduced amino acid sequence of human PCSK9 consists of a signal peptide (aa 1 to 30), a propeptide (aa 31 to 152), and a mature chain (aa 153 to 692) that contains a serine protease domain (aa 161 to 431) found in members of the furin/PC family. PCSK9 protease activity may be limited, since it has only been demonstrated through its own autocatalytic processing (2). After the autocleavage in the ER, the pro domain and mature chain exit the cell together through non‑covalent interactions (3). PCSK9 is a key regulator of LDL-cholesterol levels (LDL-C) through binding of the LDL receptor, resulting in the reduction of receptor recycling to the cell surface and the acceleration of receptor degradation in lysosomes (3). Both gain of function (GOF) and loss-of-function (LOF) mutations have been found in the PCSK9 gene (3). GOF mutations are linked to familial autosomal dominant hypercholesterolemia, a disease characterized by elevated plasma levels of LDL-C. In comparison, LOF mutations lead to low levels of LDL-C and protection against coronary heart disease.
- Seidah, N.G. et al. (2003) Proc. Natl. Acad. Sci. USA 100:928.
- Naureckiene, S. et al. (2003) Arch. Biochem. Biophys. 420:55.
- Costet, P. et al. (2008) Trends Biochem. Sci. 33:426.
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