Physical interaction of Cdc28 with Cdc37 in Saccharomyces cerevisiae.
The Cdc37 protein in Saccharomyces cerevisiae is thought to be a kinase-targeting subunit of the chaperone Hsp90. In a genetic screen, four protein kinases were identified as interacting with Cdc37 - Cdc5, Cdc7, Cdc15 and Cak1. This result underlines the importance of Cdc37 for the folding of protein kinases. In addition, we showed that Ydj1, a yeast DnaJ homolog belonging to the Hsp40 family of chaperones, genetically interacts with Cdc37. No physical interaction has so far been detected between Cdc37 and Cdc28, although genetic interactions (synthetic lethality and mutation suppression), and biochemical studies have suggested that these two proteins functionally interact. We found that, when separately expressed, the N-terminal lobe of Cdc28 interacted strongly with the C-terminal moiety of Cdc37 in a two-hybrid system. This was not the case for the full-length Cdc28 protein. We present models to explain these results.
Mort-Bontemps-Soret
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Institut Curie, UMR2027 CNRS, Bât. 110, 91405 Orsay, France.
Facca
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Faye
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D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D001665:Binding Sites; D017489:CDC28 Protein Kinase, S cerevisiae / Q000235:genetics / Q000378:metabolism*; D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism*; D004271:DNA, Fungal / Q000235:genetics; D029721:Drosophila Proteins; D005800:Genes, Fungal; D005816:Genetic Complementation Test; D050956:HSP40 Heat-Shock Proteins; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism; D008954:Models, Biological; D018832:Molecular Chaperones / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D009154:Mutation; D011485:Protein Binding; D017510:Protein Folding; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D013489:Suppression, Genetic; D013696:Temperature; D020798:Two-Hybrid System Techniques
C513270:CDC37 protein, S cerevisiae; D018797:Cell Cycle Proteins; D004271:DNA, Fungal; D029721:Drosophila Proteins; D050956:HSP40 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D018832:Molecular Chaperones; D029701:Saccharomyces cerevisiae Proteins; C070319:YDJ1 protein, S cerevisiae; D017489:CDC28 Protein Kinase, S cerevisiae