Human CellExp™ LDLR, human recombinant | 7472

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.

7472 | Human CellExp LDLR human recombinant DataSheet

Biomolecule/Target: LDLR

Synonyms: LDLR, FH, FHC, LDLCQ2, Low-Density Lipoprotein (LDL) Receptor

Alternates names: Angiostatin K1-4, Angiostatin Kringles 1-4, plasminogen

Taglines: Mediates the endocytosis of cholesterol-rich LDL

NCBI Gene ID #:

NCBI Gene Symbol:

Gene Source: Human

Accession #: P00747

Recombinant: Yes

Source: E. coli

Purity by SDS-PAGEs: 95%

Assay: SDS-PAGE

Purity: N/A

Assay #2: N/A

Endotoxin Level: <1 EU/g by LAL method

Activity (Specifications/test method): N/A

Biological activity: The activity is assayed on anti-proliferation and anti-migration of endothelial cells in vitro and anti-angiogenesis in vivo. The specific activity of anti-migration of endothelial cells in vitro is 0.55×10 Units/mg.

Results: 0.55×10 Units/mg.

Binding Capacity: N/A

Unit Definition: N/A

Molecular Weight: 30.0 kDa

Concentration: N/A

Appearance: Lyophilized

Physical form description: Lyophilized from 0.22 m filtered solution in PBS, pH 7.4. Normally Mannitol or Trehalose is added as protectants before lyophilization.

Reconstitution Instructions: Reconstitute in sterile distilled HO or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/ml.

Amino acid sequence: N/A