The yeast suppressor of myosin 2 protein (Smy2) interacts with mRNA-processing proteins through recognition of proline-rich sequences (PRS). Here, we describe the crystal structure of the GYF domain of Smy2 in association with a PRS from the yeast branch point binding protein (BBP/ScSF1). Complex formation requires that the beta-hairpin of the central PPGL motif of the ligand is accommodated by an extended hydrophobic cleft in the domain-a specificity feature that is maintained in the human protein GIGYF2. SILAC/MS experiments in combination with PRS site inhibition show that Smy2 associates with the Ccr4-NOT deadenylase complex, whereas GIGYF2 interacts not only with mRNA surveillance factors, but also with vesicular transport proteins and Atrophin-1. GIGYF2 is shown to associate with COPII-vesicle proteins and localize to the ER and Golgi in resting cells, whereas environmental challenge drives GIGYF2 into stress granules. The current study highlights the structural basis for PRS recognition by Smy2-type GYF domains, and implicates Smy2 and GIGYF2 in both mRNA processing and the secretory pathway.CI - Copyright (c) 2010 Elsevier Ltd. All rights reserved.
|Evidence ID||Analyze ID||Interactor||Interactor Systematic Name||Interactor||Interactor Systematic Name||Type||Assay||Annotation||Action||Modification||Phenotype||Source||Reference||Note|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Gene Ontology Term||Gene Ontology Term ID||Qualifier||Aspect||Method||Evidence||Source||Assigned On||Annotation Extension||Reference|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Phenotype||Experiment Type||Experiment Type Category||Mutant Information||Strain Background||Chemical||Details||Reference|
|Evidence ID||Analyze ID||Regulator||Regulator Systematic Name||Target||Target Systematic Name||Experiment||Assay||Construct||Conditions||Strain Background||Reference|