Modeling the Budding Yeast Cell Cycle

CLB1 clb2∆ pds1∆

debug: ,
test user =
test db =

Simulation:

Change of parameters: ksb2'=0.0003, ksb2"=0.013 (=33% of WT), kspds1"=ks2pds"=0.

Experiments:

Shirayama, M., Toth, A., Galova, M. and Nasmyth, K. (1999). APC(CDC20) promotes exit from mitosis by destroying the anaphase inhibitor Pds1 and cyclin Clb5. Nature 402:203-207.
[Abstract] [Article]
Experimental results: Inviable.
Comments: Problem for the model. If the two single mutants CLB1 clb2∆ and pds1∆ are viable (i.e, ignore the problem of Esp1 activation), then the double mutant clb2∆ pds1∆ should be viable as well.

We would expect that, in the absence of Clb2, Cdc5 activation would be delayed even longer, which should not cause problems for pds1∆ cells. We will not be able to account for this mutant until we understand better the roles of Cdc5 and Clb1 in mitotic events.