Binding Terms Survey Comments

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Question 1

The GO consortium should remove all annotations which describe catalytic domain substrate binding, associated with catalytic activities or transport proteins, and no longer annotate these interactions.


  1. Terms should be annotated to binding terms only if there was an experiment that demonstrated binding. There should not be coannotation for substrate binding if an experiment demonstrates catalytic activity. Instead the catalytic annotation should be made.
  2. I disagree, but one should only annotate to binding if binding is directly demonstrated.
  3. I dissagree with the proposal. If paper has experiment for a kinase that demonstrates ATP binding, then we should annotate it. There must be an experiment since the annotation would be an IDA. What if an unknown protein is shown to bind DNA; then 5 years later, it is shown to have helicase activity. It would be counterproductive to then have to remove the first annotation.

Question 2

Change the definition of 'x binding' terms to explicitly exclude catalytic domain substrate binding. Comments:

  1. For all the questions involving x binding redefinition, I am opposed to precomposed terms of the type "x binding" Wed, 6/3/09 6:45 PM

edit 2. Do not change the definition, change annotation practice. Wed, 6/3/09 5:19 PM edit 3. When I read a paper and they show that it binds GTP, then I would like to be able to curate that fact, especially when I have no other molecular function information to give. The author is unlikely to make any unequivocal statement stating that it binds GTP but definitely doesn't hydrolyze it. And, if I have to go read other papers that do separate experiments which show that it is "NOT" hydrolyzed, can I really use the original reference as my sole source for that annotation? It seems that I have to draw an inference from multiple experiments to know that it does A (binds GTP), but definitely doesn't do B (use it as a substrate). I like to try to limit my annotations to what is directly shown by a particular experiment when possible. Wed, 6/3/09 3:22 PM edit 4. Again, binding should only be annotated if it is directly demonstrated. Wed, 6/3/09 11:01 AM edit 5. It would be an ENORMOUS amount of work to go back through annotations to decide whether the term was used 'correctly' or not Wed, 6/3/09 10:59 AM edit 6. I am not sure removing all of the "incorrect" annotations is necessary. I view it as "redundant information", which should be eliminated because it doesn't add information. Tue, 6/2/09 12:23 PM edit 7. Annotation of such binding should only be made when the experiment specifically shows such binding, when the point of the experiment is to prove such binding, not inferred by the annotator because of the presence or requirement of a cofactor or reagent in the reaction mix. Tue, 6/2/09 10:52 AM edit 8. In many older biochemistry papers, binding was used as an indicator that the protein might have catalytic activity on the binding partner. Ex: one step in the purification of a helicase might be a DNA column, but other proteins that bind to the column might not have helicase activity. It would still be useful to capture the DNA binding activity of these proteins even if they are subsequently shown to have catalytic activity on DNA. Also, it's useful to have a sense of history in GO, i.e. what was known when, so that we can see how partial information (DNA binding) might develop into a clearer picture (topoisimerase). Tue, 6/2/09 10:27 AM edit 9. I agree with all of the cons; I reject all of the pros. Tue, 6/2/09 9:36 AM edit 10. I don't see why this applies: "In future curators would not be able to annotate proteins for which the only information presented is that they bind 'x' (with no indication of the context of this binding - is it a substrate/cofactor/something else?). " If they bind 'x' then they could be annotated as such. In the future if 'x' is discovered to be a substrate, the previous annotation would have to be removed. Tue, 6/2/09 8:44 AM edit 11. I dont think it's possible to do annotation if one annotation (x binding) depends on another annotation (here, catalytic activity).

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