Cell Cycle Content Meeting follow-up 27 March 2013

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Meeting report

  • Work through comments

Phase terms, TO DO

Merge of phase terms Previous e-mail from Jane

1. The relationship between the phases and other cell cycle processes. David OS has suggested that we could continue to use part_of, or when part_of is too strong use happens_during (also starts_during and ends_during). But I got the sense during the meeting that we wanted to steer away from using part_of between processes and phases and make the phases both is_a and part_of disjoint from the rest of bp? The main part_of children are currently the cell cycle transitions.

 * Val: I feel *very strongly* that they should all be happens_during....I think we should stick with this  *unless* anyone can find an annotation where this is not true... 

2. How to handle phases that are also processes. It's possible to frame some phases as processes, indeed some phases are defined this way e.g. metaphase. Would we want these to be represented under both 'cell cycle phase' and 'cell cycle process' and have two separate terms? Or do we decide which should be phases and which should be processes and just split them up?

3. Do we want to make this node generic for all phases in GO, and use it to house some of the e.g. developmental phases there? How might that look e.g.:

* biological process
** [i] cell cycle phase
*** [i] developmental phase, etc


* I have asked Chris for a list of direct annotations
* Propose we add a soft check and a comment, "not to be used for direct annotation", and refer to the existing part of children for reannotation
* Defs currently make these sound like processes, redefine as phases?

mitosis and meiosis I & II

  • outstanding question: although this is currently a little odd, because although mitosis has a nuclear division parent, meiosis meiosis I and meiosis II don't....maybe the meiosis terms are a little broader and encompass MORE than nuclear division ? although maybe this is confusion between a "meiotic cell cycle" and "meiosis".... I'm not sure.....anyone else know?
  • follow up to Q above: OK meiosis is "a specialised type of nuclear division" so it should also have this parent (I'll ask Midori if there is a reason why it doesn't). When people refer to "meiosis" in the broader sense, they are really talking about the meiotic cell cycle, or meiotic development (i.e which would include sporulation in fission yeast). We should probably define meiosis and mitosis as a type of nuclear division (qualified by the cell cycle in which it takes place (meiotic or mitotic). each should have 2 parents the "x cell cycle" & "nuclear division". I'm struggling with meiosis I and meiosis II, because if these are the specialised nuclear divisions there are lots of child processes which are not part of nuclear division (DNA replication processes and the G2/M transition for example). It seems as though we need a term which represent to represent all of the events which occur (meiosis I + interphase) ......I have not seen such phrases used ........and I haven't managed to find anything yet....?

(Midori thinks the ommission was just an ommission)

  • more follow up: OK it sounds as though we need to add these "nuclear division" parents, and then find a way to represent

"meiosis I cell cycle process" and "meiosis II cell cycle process" (maybe that is the way?) to capture all the events which happen during interphase AND meiosis of those specific divisions, and then move the existing children of meiosis I & II to these new parent terms where appropriate (obviusly the events which are analogous to the mitotic events can stay under the Meiosis I and meiosis II terms).

Would that work?

Checkpoints TO DO

  • G2 DNA damage checkpoint: this is should only be a grouping term for mitotic and meiotic G2 DNA damage, which should always be annotatable, so :

i) should flag as not to be used in direct annotation ii) add missing children like signal transduction involved in DNA damages checkpoint

  • Merges of the checkpoint terms. To demerge or not.
  • Regulation between checkpoint signaling and checkpoint response (signaling is_a positive regulation of response?)
  • Regulation between checkpoint signaling and phase transition (signaling is_a negative regulation of phase transition?)
  • Regulation between checkpoint and phase transition (checkpoint is_a negative regulation of phase transition?)

SF tickets

  • regulation of CDK activity [1]