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E-Cadherin is a major component of adherens junctions on cell surfaces. SNX16 is a unique member of sorting nexins that contains a coiled-coil (CC) domain downstream of the PX domain. We report here that SNX16 regulates the recycling trafficking of E-cadherin. We solved the crystal structure of PX-CC unit of SNX16 and revealed a unique shear shaped homodimer. We identified a novel PI3P binding pocket in SNX16 that consists of both the PX and the CC domains. Surprisingly, we showed that the PPII/α2 loop, which is generally regarded as a membrane insertion loop in PX family proteins, is involved in the E-cadherin binding with SNX16. We then proposed a multivalent membrane binding model for SNX16. Our study postulates a new mechanism for coordinated membrane binding and cargo binding for SNX family proteins in general, and provide novel insights into recycling trafficking of E-cadherin.
Pubmed ID: 28712807 RIS Download
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A Python-based software suite for the automated determination of molecular structures using X-ray crystallography and other methods. Phenix includes programs for assessing data quality, experimental phasing, molecular replacement, model building, structure refinement, and validation. It also includes tools for reflection data and creating maps and models. Phenix can also be used for neutron crystallography. Tutorials and examples are available in the documentation tab.
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