Non-activated receptor complex proteins and uses thereof

摘要

The invention features a substantially pure ZPR1 polypeptide. For example, a ZPR1 polypeptide that specifically binds to a non-activated membrane-bound receptor (e.g., EGF or PDGF receptors) and specifically binds small nucleolar RNAs (e.g., U3). ZPR1 polypeptides can be isolated from any eukaryote, including mammals (e.g. rodents and humans) and fungi (e.g., S. cerevisiae and S. pombe).