Ontology meeting 2012-08-22

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45-minute meeting

MINUTES: Tanya

ATTENDEES:

Asserting implied links/removing redundant links for chemicals

  • For the work with CHEBI we really need to assert all of the links implied by go_xp_chebi.obo. Would also be good to remove the redundant links while we're at it. Can we come up with a plan of action to do this asap?


ROLES

  • Carried over from last week's meeting [1]. What's the consensus on having roles in GO?
    • morphogen activity ; GO:0016015
    • hormone activity
    • protein tag ; GO:0031386
    • holin activity ; GO:0034290
  • Are roles ok, if they have a part_of relationship to some process?


New template for 'protein localization to'

  • Carried over from last week's meeting [2].
  • We have a mixture at the moment of 'localization TO, localization AT, localization IN'. We should standardize these, so what's the best wording, and what do we mean by it... presumably a protein travelling TO an organelle/cellular location and travelling/being maintained IN that organelle/cellular location once it's there.


single-organism process v/s multiorganism process

As discussed at the last meeting, we've been overloading the meaning of 'cellular process' to mean both 'a process occurring at the cellular level' and 'a process occurring within a single organism' by putting a disjoint between cellular process and multi-organism process. This causes problems for cellular-level processes that involve more than one organism, as we've found repeatedly with viruses. Becky and I propose the following top-level split:

multi-organism process
---[i] multi-organism cellular process
------[i] interaction between cellular organisms
single-organism process
---[i] cellular process within a single organism 
---[i] process within single multicellular organism
cellular process
---[i] cellular process within a single organism 
---[i] multi-organism cellular process
multicellular organism process
---[i] process within single multicellular organism
---[i] interaction between multicellular organisms

Then the disjoints would be between cellular process/multicellular organism process and multi-organism process/single-organism process. We could probably find better names.


Multi-functional enzymes

For example, terminase has two functions: translocating the nucleic acid into the phage head, and cleaving it at the correct point. These are always coupled.

We get these issues in SF all the time, so we need to come up with a general solution, even if it's not likely to be our final solution.

A related issue is where the same or similar reactions can be carried out by one enzyme v/s multiple enzymes. We've handled this inconsistently in the ontologies - sometimes we have one term for the overall reaction (especially where EC do this e.g. methylthiol:coenzyme M methyltransferase activity ; GO:0044683), sometimes we break it into its constituent parts.