Novel mad2 alleles isolated in a Schizosaccharomyces pombe gamma-tubulin mutant are defective in metaphase arrest activity, but remain functional for chromosome stability in unperturbed mitosis.

Abstract excerpt

A previously isolated fission yeast gamma-tubulin mutant containing apparently stabilized microtubules proliferated at an approximately identical rate as wild type, yet the mutant mitosis spindle dynamics were aberrant, particularly the kinetochore microtubule dynamics. Progression through mitosis in the mutant, however, resulted in mostly accurate chromosome segregation. In the absence of the spindle assembly...

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