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Scientific article
English

Genetic and biochemical interactions between the Arp2/3 complex, Cmd1p, casein kinase II, and Tub4p in yeast

Published inFEMS yeast research, vol. 4, no. 1, p. 37-49
Publication date2003
Abstract

Arc35p, a component of the Arp2/3 complex, plays at least two distinct roles, regulating the actin cytoskeleton, but also microtubule function during cell division. Both functions involve calmodulin (CMD1). To investigate the pathway affecting microtubule function, we identified genes that are able to suppress the temperature-sensitive growth defect of the arc35-1 strain. Genes encoding gamma-tubulin (TUB4) or any subunit of casein kinase II (CKII) suppressed this growth defect, but did not suppress the growth defect of a mutant in another subunit of the Arp2/3 complex, arp2-1. We could also show a physical association of Arc35p with subunits of CKII, Cmd1p, and Tub4p. Based on the exclusive localization of Arc35p to the cytosolic Arp2/3 complex and on mutant phenotypes, we propose that the role of the Arc35p/CKII interaction might be to activate a cytosolic pool of gamma-tubulin, likely via calmodulin, for its nuclear and/or cytoplasmic functions.

Keywords
  • Arc35p
  • Arp2/3 complex
  • Cmd1p
  • Casein kinase II
  • Tub4p
  • Yeast
Citation (ISO format)
SCHAERER-BRODBECK, Claudia, RIEZMAN, Howard. Genetic and biochemical interactions between the Arp2/3 complex, Cmd1p, casein kinase II, and Tub4p in yeast. In: FEMS yeast research, 2003, vol. 4, n° 1, p. 37–49. doi: 10.1016/s1567-1356(03)00110-7
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ISSN of the journal1567-1356
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