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Human CellExp LDLR, human recombinant protein
LDLR, FH, FHC, LDLCQ2, Low-Density Lipoprotein (LDL) Receptor
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
| Primary Accession | P01130 |
|---|---|
| Calculated MW | This protein is fused with a C-terminal 6×his tag and has a calculated MW of 86 kDa. The predicted N-terminal is Ala22 or Asp193. Corresponding to the mature and immature form, DTT-reduced protein migrates as 95-110 kDa &125-140 kDa polypeptide in SDS-PAGE resulting from different glycosylation. |
| Gene ID | 3949 |
|---|---|
| Gene Symbol | LDLR |
| Other Names | LDLR, FH, FHC, LDLCQ2, Low-Density Lipoprotein (LDL) Receptor |
| Gene Source | Human |
| Source | HEK293 cells |
| Assay&Purity | SDS-PAGE; ≥90% |
| Assay2&Purity2 | N/A; |
| Recombinant | Yes |
| Results | Measured in a competitive binding assay. When human LDL is immobilized at 1 µg/ml (100 µl/well), recombinant human LDLR inhibits 50% binding of biotinylated recombinant human LDLR (0.5 µg/ml) at the concentration range of 0.35 – 2.5 µg/ml. |
| Target/Specificity | LDLR |
| Application Notes | Centrifuge the vial prior to opening. Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 µg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 month. For extended storage, it is recommended to store at -20°C. |
| Format | Lyophilized |
| Storage | -20°C; Lyophilized from 0.22 µm filtered solution in PBS, pH 7.4. Normally Mannitol or Trehalose is added as protectants before lyophilization. |
Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abcepta to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.
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Provided below are standard protocols that you may find useful for product applications.
Background
Low-Density Lipoprotein (LDL) Receptor, also known as LDLR, FH, FHC, LDLCQ2, and is a mosaic protein of ~840 amino acids (after removal of signal peptide) that mediates the endocytosis of cholesterol-rich LDL. It is a cell-surface receptor that recognizes the apoprotein B100 which is embedded in the phospholipid outer layer of LDL particles. The receptor also recognizes the apoE protein found in chylomicron remnants and VLDL remnants (IDL). It belongs to the Low density lipoprotein receptor gene family. LDL receptor complexes are present in clathrin-coated pits (or buds) on the cell surface, which when bound to LDL-cholesterol via adaptin, are pinched off to form clathrin-coated vesicles inside the cell. This allows LDL-cholesterol to be bound and internalized in a process known as endocytosis and prevents the LDL just diffusing around the membrane surface. This occurs in all nucleated cells (not erythrocytes), but mainly in the liver which removes ~70% of LDL from the circulation. Synthesis of receptors in the cell is regulated by the level of free intracellular cholesterol; if it is in excess for the needs of the cell then the transcription of the receptor gene will be inhibited. LDL receptors are translated by ribosomes on the endoplasmic reticulum and are modified by the Golgi apparatus before travelling in vesicles to the cell surface. LDL is directly involved in the development of atherosclerosis, due to accumulation of LDL-cholesterol in the blood. Atherosclerosis is the process responsible for the majority of cardiovascular diseases.
References
Yamamoto T.,et al.Cell 39:27-38(1984).
Suedhof T.C.,et al.Science 228:815-822(1985).
Jia S.,et al.Submitted (MAY-2002) to the EMBL/GenBank/DDBJ databases.
Ota T.,et al.Nat. Genet. 36:40-45(2004).
Kalnine N.,et al.Submitted (OCT-2004) to the EMBL/GenBank/DDBJ databases.
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