LDLRAP1, Recombinant Protein

Low density lipoprotein receptor adaptor protein 1; ARH; ARH1; ARH2; FHCB1; FHCB2

For Research Use Only. Not for use in diagnostic procedures.

E Coli

> 90% by SDS-PAGE

Liquid. In 20mM Tris-HCl Buffer (pH 8.0) containing 2mM DTT, 10% glycerol, 200mM NaCl

0.5 mg/ml (determined by Bradford assay) (lot specific)

Can be stored at 4 degree C short term (1-2 weeks).
For long term storage, aliquot and store at -20 degree C or -70 degree C.
Avoid repeated freezing and thawing cycles.

Small volumes of LDLRAP1 recombinant protein vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

LDLRAP1 (Low density lipoprotein receptor adapter protein 1) is a cytosolic protein which contains a phosphotyrosine binding (PTD) domain. LDLRAP1 is a cytosolic adaptor that couples LDLR to endocytic machinery. Defects in LDLRAP1 are the cause of autosomal recessive hypercholesterolemia (ARH). ARH is a disorder caused by defective internalization of LDL receptors (LDLR) in the liver. Recombinant human LDLRAP1 protein, fused to His-tag at N-terminus, was expressed in E Coli and purified by using conventional chromatography techniques.

Metabolism

SDS-PAGE

36.1kDa (328aa), confirmed by MALDI-TOF

low density lipoprotein receptor adaptor protein 1

low density lipoprotein receptor adapter protein 1

Low density lipoprotein receptor adapter protein 1

The protein encoded by this gene is a cytosolic protein which contains a phosphotyrosine binding (PTD) domain. The PTD domain has been found to interact with the cytoplasmic tail of the LDL receptor. Mutations in this gene lead to LDL receptor malfunction and cause the disorder autosomal recessive hypercholesterolaemia. [provided by RefSeq, Jul 2008]

Adapter protein (clathrin-associated sorting protein (CLASP)) required for efficient endocytosis of the LDL receptor (LDLR) in polarized cells such as hepatocytes and lymphocytes, but not in non-polarized cells (fibroblasts). May be required for LDL binding and internalization but not for receptor clustering in coated pits. May facilitate the endocytocis of LDLR and LDLR-LDL complexes from coated pits by stabilizing the interaction between the receptor and the structural components of the pits. May also be involved in the internalization of other LDLR family members. Binds to phosphoinositides, which regulate clathrin bud assembly at the cell surface. Required for trafficking of LRP2 to the endocytic recycling compartment which is necessary for LRP2 proteolysis, releasing a tail fragment which translocates to the nucleus and mediates transcriptional repression ().

Garcia C.K., et al. (2001) Science 292:1394-1398; Mishra S.K., et al. (2005) J. Biol. Chem. 280:19270-19280

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