Reference: Park HO, et al. (1993) BUD2 encodes a GTPase-activating protein for Bud1/Rsr1 necessary for proper bud-site selection in yeast. Nature 365(6443):269-74

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Abstract


Cells of the budding yeast Saccharomyces cerevisiae bud at either axial or bipolar sites depending on their cell type. Bud-site selection directs both cell polarity and the cytoskeletal orientation during budding and is determined by at least five genes: BUD1/RSR1, BUD2, BUD3, BUD4 and BUD5. Mutants defective in BUD1, BUD2 or BUD5 choose bud sites randomly. Bud1 protein (Bud1p) has sequence similarity to Ras, a small GTP-binding protein, and Bud5p is similar to Cdc25p (refs 4, 5), a GDP-GTP exchange factor. Here we report that Bud2p is a GTPase-activating protein (GAP) for Bud1p with a sequence similar to the catalytic domain of rasGAPs, and that Bud2p purified from yeast stimulates GTP hydrolysis by Bud1p. Chromosomal deletion of BUD2 causes a random budding pattern but no obvious growth defect. Overexpression of BUD2 also causes a random budding pattern by wild-type cells.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Park HO, Chant J, Herskowitz I
Primary Lit For
BUD5 | BUD2
Additional Lit For
RSR1 | BUD4 | BUD3 | CDC25

Gene Ontology Annotations 1 entry for 1 gene


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Gene/ComplexQualifierGene Ontology TermAnnotation ExtensionEvidenceSourceAssigned On
BUD2enablesGTPase activator activityhas input BUD2IDASGD2019-11-06
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Interaction Annotations


Genetic Interactions

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Interactor Interactor Allele Assay Annotation Action Phenotype SGA score P-value Source Reference

Physical Interactions 1 entry for 2 genes

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InteractorInteractorAssayAnnotationActionModification
BUD2RSR1Biochemical Activitymanually curatedBait-HitNo Modification
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