Download MendeleyMolecular basis of familial hypercholesterolaemia from structure of LDL receptor module.
Fass, D., Blacklow, S., Kim, P.S., Berger, J.M.(1997) Nature 388: 691-693
- PubMed: 9262405
- DOI: https://doi.org/10.1038/41798
- Primary Citation of Related Structures:
1AJJ - PubMed Abstract:
The low-density lipoprotein receptor (LDLR) is responsible for the uptake of cholesterol-containing lipoprotein particles into cells. The amino-terminal region of LDLR, which consists of seven tandemly repeated, approximately 40-amino-acid, cysteine-rich modules (LDL-A modules), mediates binding to lipoproteins. LDL-A modules are biologically ubiquitous domains, found in over 100 proteins in the sequence database. The structure of ligand-binding repeat 5 (LR5) of the LDLR, determined to 1.7 A resolution by X-ray crystallography and presented here, contains a calcium ion coordinated by acidic residues that lie at the carboxy-terminal end of the domain and are conserved among LDL-A modules. Naturally occurring point mutations found in patients with the disease familial hypercholesterolaemia alter residues that directly coordinate Ca2+ or that serve as scaffolding residues of LR5.
Organizational Affiliation:
Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge 02142, USA.
