Regulation of cadherin dimerization by chemical fragments as a trigger to inhibit cell adhesion.
2021
Many cadherin family proteins are associated with diseases such as cancer. Since cell adhesion requires homodimerization of cadherin molecules, a small-molecule regulator of dimerization would have therapeutic potential. Herein, we describe identification of a P-cadherin-specific chemical fragment that inhibits P-cadherin-mediated cell adhesion. Although the identified molecule is a fragment compound, it binds to a cavity of P-cadherin that has not previously been targeted, indirectly prevents formation of hydrogen bonds necessary for formation of an intermediate called the X dimer and thus modulates the process of X dimerization. Our findings will impact on a strategy for regulation of protein-protein interactions and stepwise assembly of protein complexes using small molecules. Senoo et al. describe a chemical fragment that disrupts dimerization of P-cadherin. In doing so, this fragment inhibits cadherin-mediated cell-adhesion and aggregation.
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