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Proteins of the low-density lipoprotein receptor (LDLR) family are remarkable in their ability to bind an extremely diverse range of protein and lipoprotein ligands, yet the basis for ligand recognition is poorly understood. Here, we report the 1.26 Å X-ray structure of a complex between a two-module region of the ligand binding domain of the LDLR and the third domain of RAP, an escort protein for...
Low-density lipoprotein (LDL) receptors bind lipoprotein particles at the cell surface and release them in the low pH environment of the endosome. The published structure of the receptor determined at endosomal pH reveals an interdomain interface between its β propeller and its fourth and fifth ligand binding (LA) repeats, suggesting that the receptor adopts a closed conformation at low pH to release...
Poxviral DNA topoisomerases are sequence-specific enzymes whose activities are thought to influence such diverse processes as transcription, DNA replication, and genetic recombination. To obtain further insights into the relatedness of these enzymes, and their influence on virus-mediated recombination, we have determined the target-specificity and other catalytic properties of the Shope fibroma virus...
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