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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Protein A-calmodulin fusions: a novel approach for investigating calmodulin function in yeast.

A novel gene fusion approach which may be of more general use has been developed for investigating the function of calmodulin in the budding yeast Saccharomyces cerevisiae. By fusing a portion of the Staphylococcus aureus spa gene (encoding protein A) to CMD1, the S. cerevisiae gene encoding calmodulin, we have generated a yeast calmodulin with an affinity tag able to bind immunoglobulins. The chimaeric protein A-calmodulin (ProtA-CaM) polypeptide functions in vivo and shows Ca(2+)-dependent binding to calmodulin target proteins. The spa-CMD1 fusion has been used (i) to prepare (by affinity chromatography) a fraction of yeast proteins which interact with calmodulin, (ii) to isolate genes encoding calmodulin target proteins by direct screening of an expression library, and (iii) to visualize calmodulin-binding proteins in crude extracts by Western blot analysis.[1]

References

  1. Protein A-calmodulin fusions: a novel approach for investigating calmodulin function in yeast. Stirling, D.A., Petrie, A., Pulford, D.J., Paterson, D.T., Stark, M.J. Mol. Microbiol. (1992) [Pubmed]
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