The structure of the beta-catenin/E-cadherin complex and the molecular basis of diverse ligand recognition by beta-catenin - PubMed (original) (raw)
The structure of the beta-catenin/E-cadherin complex and the molecular basis of diverse ligand recognition by beta-catenin
A H Huber et al. Cell. 2001.
Free article
Abstract
As a component of adherens junctions and the Wnt signaling pathway, beta-catenin binds cadherins, Tcf family transcription factors, and the tumor suppressor APC. We have determined the crystal structures of both unphosphorylated and phosphorylated E-cadherin cytoplasmic domain complexed with the arm repeat region of beta-catenin. The interaction spans all 12 arm repeats, and features quasi-independent binding regions that include helices which interact with both ends of the arm repeat domain and an extended stretch of 14 residues which closely resembles a portion of XTcf-3. Phosphorylation of E-cadherin results in interactions with a hydrophobic patch of beta-catenin that mimics the binding of an amphipathic XTcf-3 helix. APC contains sequences homologous to the phosphorylated region of cadherin, and is likely to bind similarly.
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