1991
DOI: 10.1016/0092-8674(91)90417-w
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A cyclin B homolog in S. cerevisiae: Chronic activation of the Cdc28 protein kinase by cyclin prevents exit from mitosis

Abstract: A cyclin B homolog was identified in Saccharomyces cerevisiae using degenerate oligonucleotides and the polymerase chain reaction. The protein, designated Scb1, has a high degree of similarity with B-type cyclins from organisms ranging from fission yeast to human. Levels of SCB1 mRNA and protein were found to be periodic through the cell cycle, with maximum accumulation late, most likely in the G2 interval. Deletion of the gene was found not to be lethal, and subsequently other B-type cyclins have been found i… Show more

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Cited by 299 publications
(253 citation statements)
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“…These findings have led to the notion that cyclin destruction (and thereby kinase inactivation) triggers the metaphase to anaphase transition (Murray and Kirschner, 1989; Glotzer et al, 1991). However, apart from a single preliminary study (Ghiara et al, 1991) (Ghiara et al, 1991;Surana et al, 1991) Of these, CLB2 seems the most important for mitosis because its deletion uniquely delays exit from G2 whereas triple mutants lacking CLBI, 3 and 4 undergo nuclear division with nearly normal kinetics (Fitch et al, 1992). We show here that CDC28 kinase activity associated with CLB2 fluctuates during the cell cycle, reaching a maximum just prior to anaphase and disappearing soon after.…”
Section: Introductionmentioning
confidence: 99%
“…These findings have led to the notion that cyclin destruction (and thereby kinase inactivation) triggers the metaphase to anaphase transition (Murray and Kirschner, 1989; Glotzer et al, 1991). However, apart from a single preliminary study (Ghiara et al, 1991) (Ghiara et al, 1991;Surana et al, 1991) Of these, CLB2 seems the most important for mitosis because its deletion uniquely delays exit from G2 whereas triple mutants lacking CLBI, 3 and 4 undergo nuclear division with nearly normal kinetics (Fitch et al, 1992). We show here that CDC28 kinase activity associated with CLB2 fluctuates during the cell cycle, reaching a maximum just prior to anaphase and disappearing soon after.…”
Section: Introductionmentioning
confidence: 99%
“…It has been proposed that some checkpoint controls over mitosis are switched from the APC/C during G1 to include tyrosine phosphorylation of p34 cdc2 upon initiation of DNA replication (Ye et al, 1997a). BIME APC1 may therefore normally play a role to prevent activation of NIMA kinase, and other mitotic regulators, during interphase to prevent premature mitosis.The levels of NIME cyclinB and NIMA proteins oscillate once each cell cycle in a strikingly similar manner (Evans et al, 1983;Alfa et al, 1990;Draetta et al, 1990;Ghiara et al, 1991;Hunt et al, 1992;Richardson et al, 1992;Grandin and Reed, 1993;Pu and Osmani, 1995;Ye et al, 1995;Yamano et al, 1996). Both proteins accumulate during late S to G2, peak at early M, and are rapidly degraded as cells progress out of mitosis with slightly different kinetics Ye et al, 1995).…”
mentioning
confidence: 95%
“…Cdc2 is positively regulated by cyclin B (Pines and Hunter, 1989;Ghiara et al, 1991;Surana et al, 1991). The binding of cyclin B to Cdc2 induces phosphorylation of the complex, which leads to its activation at the G2 to M transition (Enoch and Nurse, 1990;Gould et al, 1991).…”
mentioning
confidence: 99%