TY - JOUR

T1 - Binding site structure of one LRP-RAP complex: implications for a common ligand-receptor binding motif.

AU - Jensen, Gitte A

AU - Andersen, Olav M

AU - Bonvin, Alexandre M J J

AU - Bjerrum-Bohr, Ida

AU - Etzerodt, Michael

AU - Thøgersen, Hans C

AU - O'Shea, Charlotte

AU - Poulsen, Flemming M

AU - Kragelund, Birthe B

N1 - Keywords: Amino Acid Motifs; Amino Acid Sequence; Binding Sites; LDL-Receptor Related Proteins; Ligands; Models, Molecular; Molecular Sequence Data; Nuclear Magnetic Resonance, Biomolecular; Protein Binding; Receptors, Cell Surface; Sequence Alignment; Structure-Activity Relationship; Surface Plasmon Resonance

PY - 2006

Y1 - 2006

N2 - The low-density lipoprotein receptor-related protein (LRP) interacts with more than 30 ligands of different sizes and structures that can all be replaced by the receptor-associated protein (RAP). The double module of complement type repeats, CR56, of LRP binds many ligands including all three domains of RAP and alpha2-macroglobulin, which promotes the catabolism of the Abeta-peptide implicated in Alzheimer's disease. To understand the receptor-ligand cross-talk, the NMR structure of CR56 has been solved and ligand binding experiments with RAP domain 1 (RAPd1) have been performed. From chemical shift perturbations of both binding partners upon complex formation, a HADDOCK model of the complex between CR56 and RAPd1 has been obtained. The binding residues are similar to a common binding motif suggested from alpha2-macroglobulin binding studies and provide evidence for an understanding of their mutual cross-competition pattern. The present structural results convey a simultaneous description of both binding partners of an LRP-ligand complex and open a route to a broader understanding of the binding specificity of the LRP receptor, which may involve a general four-residue receptor-ligand recognition motif common to all LRP ligands. The present result may be beneficial in the design of antagonists of ligand binding to the LDL receptor family, and especially of drugs for treatment of Alzheimer's disease. Udgivelsesdato: 2006-Sep-29

AB - The low-density lipoprotein receptor-related protein (LRP) interacts with more than 30 ligands of different sizes and structures that can all be replaced by the receptor-associated protein (RAP). The double module of complement type repeats, CR56, of LRP binds many ligands including all three domains of RAP and alpha2-macroglobulin, which promotes the catabolism of the Abeta-peptide implicated in Alzheimer's disease. To understand the receptor-ligand cross-talk, the NMR structure of CR56 has been solved and ligand binding experiments with RAP domain 1 (RAPd1) have been performed. From chemical shift perturbations of both binding partners upon complex formation, a HADDOCK model of the complex between CR56 and RAPd1 has been obtained. The binding residues are similar to a common binding motif suggested from alpha2-macroglobulin binding studies and provide evidence for an understanding of their mutual cross-competition pattern. The present structural results convey a simultaneous description of both binding partners of an LRP-ligand complex and open a route to a broader understanding of the binding specificity of the LRP receptor, which may involve a general four-residue receptor-ligand recognition motif common to all LRP ligands. The present result may be beneficial in the design of antagonists of ligand binding to the LDL receptor family, and especially of drugs for treatment of Alzheimer's disease. Udgivelsesdato: 2006-Sep-29

U2 - 10.1016/j.jmb.2006.07.013

DO - 10.1016/j.jmb.2006.07.013

M3 - Journal article

C2 - 16938309

VL - 362

SP - 700

EP - 716

JO - Journal of Molecular Biology

JF - Journal of Molecular Biology

SN - 0022-2836

IS - 4

ER -