Question 1

Should a project start in yeast or a filamentous species?

Accepted Answer

It depends on the question. Budding and fission yeasts offer genetic tools, short cycles, and decades of comparable data. Filamentous fungi are necessary if the question concerns asynchronous nuclei or septation control, but they cost more time per experiment. Many projects establish the mechanism in yeast and then test its generality elsewhere.

Question 2

Is synchronisation still acceptable for cell cycle work?

Accepted Answer

It remains useful but is no longer sufficient on its own. Block and release methods perturb metabolism and can shift the very timing under study. Reviewers now expect either a single-cell measurement or evidence that the synchronisation method does not change the phenotype being reported. Planning both routes early avoids a costly repeat later.

Question 3

How do I show that a checkpoint is genuinely active?

Accepted Answer

Arrest alone is weak evidence. A convincing case shows that the halt occurs at the expected stage, that removing the sensing pathway abolishes it, that the trigger is dose dependent, and that cells resume division once the signal clears. Missing any of these leaves room for a general sickness explanation.

Question 4

What imaging demands should be planned for?

Accepted Answer

Long acquisitions at low light, stable focus, and environmental control. Spindle and septum markers are often dim, so exposure settings become a compromise between signal and phototoxicity. Time invested in a photobleaching and viability control at the start saves considerable argument later, because division timing is exquisitely sensitive to illumination stress.

Question 5

How should cell cycle timing data be analysed?

Accepted Answer

As distributions. Report medians with the full spread, use survival or event-time methods for progression, and account for lineage relatedness when sister cells appear in the same dataset. Reducing a population to a single average discards the heterogeneity that usually carries the biological signal in checkpoint studies.

Question 6

Are conditional systems better than gene knockouts here?

Accepted Answer

Usually, yes. Many cycle regulators are essential, so a permanent loss either kills the strain or selects suppressors that confuse interpretation. Temperature-sensitive strains, repressible promoters, and induced protein degradation give acute loss at a chosen stage. Each has leakiness and off-target concerns that need characterising in the specific strain background.

Microbiology

Microbiology

Research Frontiers in Fungal Cell Cycle Checkpoint Control and Mitosis