[Annotation] [Refgenome] Process annotation for ribosomal proteins

Chris Mungall cjm at berkeleybop.org
Mon Sep 1 10:57:04 PDT 2008


On Aug 31, 2008, at 4:58 PM, Judith Blake wrote:

> so this then would be
>
> ribosome gene product 'located_in'  GO:complex  'ribsome',  ribosome  
> 'functions_in" protein biosynthesis
>
> [implication that therefore ribosome gene product functions in  
> BP:protein biosynthesis by reason of its location in the CC:ribosome]

On second thoughts, erhaps the safest inference here is one of  
contributes_to?

David, Tanya and I came up with some proposed rules for combining  
relations. For example, chaining located_in with functions_in would  
yield contributes_to

See:
http://wiki.geneontology.org/index.php/Relation_composition

Particularly:
http://wiki.geneontology.org/index.php/Relation_composition#rules_involving_gene_products

We can make stronger relations if need be. For example, a relation for  
stating that every part of the ribosome functions_in biosynthesis (if  
this happens to be true). Then we can make a stronger inference about  
gene products located in the ribosome.

>
> and yes, then IC redundant.
>
> So Harold is making a draft file of relationships for F::P, but,  
> Harold, are you also doing C:P ?
>
> until these new relationships are implemented, I agree with Harold  
> that IC would be appropriate evidence code.
>
> Judy
>
>
> Chris Mungall wrote:
>>
>> There should be a link in the ontology, ribosome functions_in  
>> protein biosynthesis. Then the IC becomes redundant.
>>
>> On Aug 29, 2008, at 10:31 PM, Harold Drabkin wrote:
>>
>>> Rama Balakrishnan wrote:
>>>> Considering that ribosomal genes are the Ref.Genome targets for  
>>>> Aug, I would like to revive this discussion.
>>>>
>>>> There was no clear answer on what evidence code is best for  
>>>> PROCESS annotation in a situation where all you know is that the  
>>>> protein is a subunit of a larger well established complex?
>>>
>>> If for example, there is a good experimental to a complex like a  
>>> ribosome,  one could use an IC to translation based on the GO id  
>>> for the ribosome and it's reference.,  I would think.  
>>> Unfortunately for mouse, the ribosomal protein genes don't even  
>>> have a real experiment to show they are in the ribosome 8-( Most  
>>> cloned via sequence similarity etc. etc.
>>>
>>> hjd
>>>
>>>>
>>>> Here is Karen's summary of the whole issue.
>>>>>
>>>>> We don't have a problem with the complex annotation. It's fine  
>>>>> to say that protein/gene X is in a complex by IDA.
>>>>>
>>>>> Our issue is with the process annotations for things where the  
>>>>> only thing you know is that it is part of a complex, e.g. RPS25A  
>>>>> is part of the ribosome, or UTP21 is part of the 90S  
>>>>> preribosome. For both of these proteins, the sum total of the  
>>>>> available experimental evidence is that they are part of the  
>>>>> specified complex. There is no individual biochemical or genetic  
>>>>> characterization. Nevertheless, the researchers who work on  
>>>>> these complexes feel that being part of a big complex, whose  
>>>>> function is known, e.g. translation for the ribosome and  
>>>>> ribosome biogenesis and assembly for the 90S preribosome, is  
>>>>> good evidence that a given gene product participates in that  
>>>>> process.
>>>>>
>>>>> Before the 2006 Annotation Camp decision that IPI could only be  
>>>>> used when you know it is direct, we used to use IPI for the  
>>>>> process annotations. Now, I'm not really sure what evidence code  
>>>>> to use in order to be able to annotate UTP21 to the process of  
>>>>> "ribosome biogenesis and assembly". Since I can't put anything  
>>>>> specific in the with field because I only know that UTP21 is  
>>>>> part of the complex, but not whether it interacted specifically  
>>>>> with any of the tagged proteins used to pull it down, we don't  
>>>>> use IPI anymore. The experiment showed that UTP21 came down in  
>>>>> the 90S preribosome complex, but while this is IDA for the  
>>>>> component annotation, is it IDA for the process annotation?
>>>>>
>>>>> It has also been suggested to use IC from the GOID from the  
>>>>> component term. However, this hides the fact that there is an  
>>>>> experimental basis to believe that protein X is involved in a  
>>>>> process Y. We're really not keen on this idea.
>>>>>
>>>>> To me, it seems that IPI is really the best explanation of the  
>>>>> type of evidence for the process annotation, i.e. we know that  
>>>>> protein X physically interacts with these other gene products as  
>>>>> part of complex Z. I think we should either go back to the  
>>>>> pre-2006 Annot Camp guidelines for IPI, which did NOT require  
>>>>> direct interaction, or allow some form of complex ID in the with  
>>>>> field to cover these situations.
>>>>>
>>>>> -Karen
>>>>
>>>> I would greatly appreciate your feedback.
>>>>
>>>> Thanks,
>>>>
>>>> Rama
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>
>>>>>> Judy
>>>>>>> To use the 'co-localizes' qualifier to qualify the identifier  
>>>>>>> in the with/from column, which is basically supporting  
>>>>>>> information for the evidence code, would be a very different  
>>>>>>> use of the qualifier. We have previously decided that we did  
>>>>>>> not want to mix and match what these qualifiers meant because  
>>>>>>> it would be confusing.
>>>>>>> Considering that the ID put in the with column is supporting  
>>>>>>> evidence, I think that it would be OK to allow IPI with "GOID  
>>>>>>> for a complex" to include both where the annotated gene  
>>>>>>> product is part of the complex and where the annotated gene  
>>>>>>> product interacts with the complex. In the specific example  
>>>>>>> brought up, we are talking about making a process annotation,  
>>>>>>> and I think that it would be valid to make process annotations  
>>>>>>> based either on a given gene product being in a complex or  
>>>>>>> interacting with it.
>>>>>>> -Karen
>>>>>>> On Fri, 27 Jun 2008, Judith Blake wrote:
>>>>>>>> Here's what I was thinking.
>>>>>>>> IPI for the binding
>>>>>>>> with the GO:complexID in the "with" field
>>>>>>>> and the 'co-localizes' as the qualifier.
>>>>>>>> Thus, the gene product 'colocalizes' with 'complexID' by  
>>>>>>>> evidence code 'IPI'
>>>>>>>> which is different than
>>>>>>>> Rama Balakrishnan wrote:
>>>>>>>>> Hi Judy,
>>>>>>>>> Comment below.
>>>>>>>>> On Jun 25, 2008, at 4:51 AM, Judith Blake wrote:
>>>>>>>>>> Rama,
>>>>>>>>>> I agree that the solution needs to go beyond ReactomeIDs.   
>>>>>>>>>> However, there are many other complex resources, and my  
>>>>>>>>>> summer intern is in the process of collecting a more global  
>>>>>>>>>> (one would hope comprehensive) list of complexes with IDs  
>>>>>>>>>> from these other resources.  So putting a complex ID in the  
>>>>>>>>>> 'with' field seems correct.  And allowing the GO:ID seems  
>>>>>>>>>> correct too
>>>>>>>>>> I think distinguishing between 'member of complex' and  
>>>>>>>>>> 'interacts with complex' is very important.    The CC  
>>>>>>>>>> assignment places a gp in a complex. I think using the IPI  
>>>>>>>>>> code here, while technically defensible, might result in  
>>>>>>>>>> the confusion.  Would this be a place that IPI with 'co- 
>>>>>>>>>> localizes' would clarify the distinction?
>>>>>>>>> Hmm...I don't think I follow your last sentence completely.
>>>>>>>>> So far, we have used Qualifiers to qualify the GO term and  
>>>>>>>>> not the evidence. And we don't use qualifiers for Process  
>>>>>>>>> terms. Contributes_to is specifically meant for Function,  
>>>>>>>>> and co_localizes is meant for CC.
>>>>>>>>> Thanks,
>>>>>>>>> Rama
>>>>>>>>>> judy
>>>>>>>>>> Rama Balakrishnan wrote:
>>>>>>>>>>> Hi all,
>>>>>>>>>>> I am sure all the other groups annotating ribosomal genes  
>>>>>>>>>>> are facing the same issue. I would like to hear from you  
>>>>>>>>>>> about the new proposal for IPI or if you have other  
>>>>>>>>>>> suggestions.
>>>>>>>>>>> Thanks,
>>>>>>>>>>> Rama
>>>>>>>>>>> On Jun 18, 2008, at 2:53 PM, Rama Balakrishnan wrote:
>>>>>>>>>>>> Hi,
>>>>>>>>>>>> 1) Although there is a REACTOME ID for the yeast ribosome  
>>>>>>>>>>>> complex, I think a better solution would be to allow the  
>>>>>>>>>>>> GOID for the complex in the 'with' column for IPI. This  
>>>>>>>>>>>> is because, Reactome has IDs only for human and yeast,  
>>>>>>>>>>>> and this solution won't scale for other organisms.
>>>>>>>>>>>> 2) If we move towards the idea of using IPI in this  
>>>>>>>>>>>> fashion, we also need to update the documentation for IPI  
>>>>>>>>>>>> because by saying that the subunit interacts physically  
>>>>>>>>>>>> with the complex, one could infer that the subunit  
>>>>>>>>>>>> peripherally interacts with the complex as oppose to  
>>>>>>>>>>>> inferring that the subunit is part of the complex.
>>>>>>>>>>>> Thanks,
>>>>>>>>>>>> Rama
>>>>>>>>>>>> On Jun 18, 2008, at 9:25 AM, D'Eustachio, Peter wrote:
>>>>>>>>>>>>> Hi, Midori,
>>>>>>>>>>>>> We do have such identifiers (though in general - this  
>>>>>>>>>>>>> case is an exception - only for human proteins and  
>>>>>>>>>>>>> complexes) and this sounds like a legitimate use of  
>>>>>>>>>>>>> them, but it also seems like a kind of hack around the  
>>>>>>>>>>>>> basic problem. Earlier in this thread, someone pointed  
>>>>>>>>>>>>> to one paper that supports the assertion "ribosomes are  
>>>>>>>>>>>>> required for translation to occur", and another that  
>>>>>>>>>>>>> supports the assertion "subunit X is required for the  
>>>>>>>>>>>>> assembly of a complete ribosome", but no single paper  
>>>>>>>>>>>>> that asserts "the ribosomes that actually participate in  
>>>>>>>>>>>>> translation have been shown to contain subunit X", and  
>>>>>>>>>>>>> so we are left to draw this conclusion by inference,  
>>>>>>>>>>>>> reading the two papers in succession. I guess all of  
>>>>>>>>>>>>> this violates the principle that there should be a 1:1:1  
>>>>>>>>>>>>> mapping of protein : GO term : publication and evidence  
>>>>>>>>>>>>> code. Here, Reactome has silently done the inference so  
>>>>>>>>>>>>> formally you can make a 1:1:1 relationship, but there's  
>>>>>>>>>>>>> still a hidden multi-step inference in there.
>>>>>>>>>>>>> That said, we live by that hack - our unit of curation  
>>>>>>>>>>>>> is the reaction, and I have yet to find the reaction all  
>>>>>>>>>>>>> of whose attributes can be annotated without combining  
>>>>>>>>>>>>> evidence assertions inferentially from multiple papers.
>>>>>>>>>>>>> Peter
>>>>>>>>>>>>> -----Original Message-----
>>>>>>>>>>>>> From: annotation-bounces at genome.stanford.edu on behalf  
>>>>>>>>>>>>> of Midori Harris
>>>>>>>>>>>>> Sent: Wed 6/18/2008 5:02 AM
>>>>>>>>>>>>> To: Karen Christie
>>>>>>>>>>>>> Cc: GO Annotation list
>>>>>>>>>>>>> Subject: Re: [Annotation] annotating ribosomal proteins
>>>>>>>>>>>>> Reactome has identifiers for complexes ... could you use  
>>>>>>>>>>>>> IPI with the
>>>>>>>>>>>>> Reactome ID for the ribosome? (E.g. S. cerevisiae  
>>>>>>>>>>>>> ribosome is
>>>>>>>>>>>>> Reactome:141693; H. sapiens is 72500.)
>>>>>>>>>>>>> If this is a stupid idea, I'll bow out quietly ... it's  
>>>>>>>>>>>>> been a long, long
>>>>>>>>>>>>> time since I did annotation.
>>>>>>>>>>>>> m
>>>>>>>>>>>>> On Tue, 17 Jun 2008, Karen Christie wrote:
>>>>>>>>>>>>>> As of the 2006 Annotation camp, we agreed that IPI  
>>>>>>>>>>>>>> could only be used when
>>>>>>>>>>>>>> you know it is a direct interaction and that you should  
>>>>>>>>>>>>>> fill the with column
>>>>>>>>>>>>>> with the directly interacting gene products.
>>>>>>>>>>>>>> Prior to that, I often used to use IPI for the proteins  
>>>>>>>>>>>>>> that came down in a
>>>>>>>>>>>>>> complex, and for 'modern' purifications where one  
>>>>>>>>>>>>>> protein was tagged, I'd put
>>>>>>>>>>>>>> that one in the with column. But we agreed that it  
>>>>>>>>>>>>>> isn't known that this is
>>>>>>>>>>>>>> direct, so we quit doing it. I've been having the same  
>>>>>>>>>>>>>> problem with
>>>>>>>>>>>>>> spliceosomal complexes and have become rather unkeen on  
>>>>>>>>>>>>>> the decision that IPI
>>>>>>>>>>>>>> could only be used for known direct interactions. It  
>>>>>>>>>>>>>> seems that this
>>>>>>>>>>>>>> requirement got added by the people who want to use the  
>>>>>>>>>>>>>> IPI with field as a
>>>>>>>>>>>>>> protein-protein interaction database.
>>>>>>>>>>>>>> Anyway, I thought that IPI with the tagged protein  
>>>>>>>>>>>>>> seemed like a much better
>>>>>>>>>>>>>> representation of the evidence for the process than  
>>>>>>>>>>>>>> IDA. Coming down as part
>>>>>>>>>>>>>> of a complex doesn't seem like a direct assay for  
>>>>>>>>>>>>>> process. IPI with one of
>>>>>>>>>>>>>> the proteins in the complex seems like a better  
>>>>>>>>>>>>>> representation of what was
>>>>>>>>>>>>>> actually done, but we can't do now that because of the  
>>>>>>>>>>>>>> direct interaction
>>>>>>>>>>>>>> requirement.
>>>>>>>>>>>>>> IC also seems a little unsatisfying, since it's not  
>>>>>>>>>>>>>> experimental. I don't
>>>>>>>>>>>>>> know, maybe for complexes as well characterized as the  
>>>>>>>>>>>>>> ribosome, or the
>>>>>>>>>>>>>> spliceosome, just being in the complex is direct  
>>>>>>>>>>>>>> evidence that it's part of
>>>>>>>>>>>>>> the process that the complex is experimentally  
>>>>>>>>>>>>>> characterized to be part of...
>>>>>>>>>>>>>> I've been a bit muddled about how best to deal with  
>>>>>>>>>>>>>> these ever since the 2006
>>>>>>>>>>>>>> Annotation camp. I liked using IPI better than IDA...
>>>>>>>>>>>>>> -Karen
>>>>>>>>>>>>>> On Tue, 17 Jun 2008, Pascale Gaudet wrote:
>>>>>>>>>>>>>>> Can you then IPI the process?
>>>>>>>>>>>>>>> Doug howe wrote:
>>>>>>>>>>>>>>> I think:
>>>>>>>>>>>>>>> "the IDA is just for the annotation to the complex  
>>>>>>>>>>>>>>> term and then use
>>>>>>>>>>>>>>> IC from the
>>>>>>>>>>>>>>> complex term for the Process annotation"
>>>>>>>>>>>>>>> is the way to go.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Doug
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Karen Christie wrote:
>>>>>>>>>>>>>>>       Hi Pascale,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       Rama is looking at the original papers, and  
>>>>>>>>>>>>>>> ribosomes and the
>>>>>>>>>>>>>>> processes
>>>>>>>>>>>>>>>       of ribosome assembly are probably better  
>>>>>>>>>>>>>>> characterized in
>>>>>>>>>>>>>>> cerevisiae
>>>>>>>>>>>>>>>       than in any other eukaryote.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       The real issue here is that what has been shown  
>>>>>>>>>>>>>>> is that protein
>>>>>>>>>>>>>>> X is
>>>>>>>>>>>>>>>       part of a big complex, e.g. the ribosome, for  
>>>>>>>>>>>>>>> which the
>>>>>>>>>>>>>>> function is
>>>>>>>>>>>>>>>       known. The sum total of the experimental  
>>>>>>>>>>>>>>> evidence available for
>>>>>>>>>>>>>>> a
>>>>>>>>>>>>>>>       significant number of ribosomal proteins is that  
>>>>>>>>>>>>>>> they are
>>>>>>>>>>>>>>> purified as
>>>>>>>>>>>>>>>       part of the ribosome complex. So, for component,  
>>>>>>>>>>>>>>> it's easy.
>>>>>>>>>>>>>>> This is IDA
>>>>>>>>>>>>>>>       evidence that protein X is in the ribosome, or  
>>>>>>>>>>>>>>> in the Small
>>>>>>>>>>>>>>> SubUnit
>>>>>>>>>>>>>>>       (SSU) or in the Large SubUnit (LSU), or whatever  
>>>>>>>>>>>>>>> complex is
>>>>>>>>>>>>>>>       characterized.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       But is being in the ribosome considered to be  
>>>>>>>>>>>>>>> IDA evidence for
>>>>>>>>>>>>>>> a process
>>>>>>>>>>>>>>>       annotation to translation? In one way of looking  
>>>>>>>>>>>>>>> at it, the
>>>>>>>>>>>>>>> direct assay
>>>>>>>>>>>>>>>       is that it's part of a complex and then you're  
>>>>>>>>>>>>>>> assuming that
>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>       individual protein is involved in translation  
>>>>>>>>>>>>>>> because it's in
>>>>>>>>>>>>>>> that
>>>>>>>>>>>>>>>       complex. Is this a direct assay for being  
>>>>>>>>>>>>>>> involved in
>>>>>>>>>>>>>>> translation? Can
>>>>>>>>>>>>>>>       we use IDA for a process annotation? or is it a  
>>>>>>>>>>>>>>> more accurate
>>>>>>>>>>>>>>> statement
>>>>>>>>>>>>>>>       to say that the IDA is just for the annotation  
>>>>>>>>>>>>>>> to the complex
>>>>>>>>>>>>>>> term and
>>>>>>>>>>>>>>>       then use IC from the complex term for the  
>>>>>>>>>>>>>>> Process annotation?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       -Karen
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>       On Tue, 17 Jun 2008, Pascale Gaudet wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>             Hi Rama,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>             I think this is a perfect case where one  
>>>>>>>>>>>>>>> of us should go
>>>>>>>>>>>>>>>             back to the original papers and find
>>>>>>>>>>>>>>>             what we all need to ISS to (in which  
>>>>>>>>>>>>>>> organism the funtion
>>>>>>>>>>>>>>>             and process were shown).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>             Pascale
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>             Rama Balakrishnan wrote:
>>>>>>>>>>>>>>>                   Hi,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>                   I have couple of ribosomal proteins  
>>>>>>>>>>>>>>> to annotate as
>>>>>>>>>>>>>>>             part of the ref-genome curation
>>>>>>>>>>>>>>>                   project. Turns out that there is no  
>>>>>>>>>>>>>>> direct
>>>>>>>>>>>>>>>             experimental evidence showing that these
>>>>>>>>>>>>>>>                   proteins are involved in  
>>>>>>>>>>>>>>> translation. Almost all
>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>             studies purify the ribosome
>>>>>>>>>>>>>>>                   from yeast and identify the subunits  
>>>>>>>>>>>>>>> by one or more
>>>>>>>>>>>>>
>>>>>>>>>>>>>>>             techniques.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>                   I can do IDA for CC annotation, that  
>>>>>>>>>>>>>>> is
>>>>>>>>>>>>>>>             straightforward. Is IDA for function
>>>>>>>>>>>>>>>                   annotation- structural constituent  
>>>>>>>>>>>>>>> of ribsomome
>>>>>>>>>>>>>>> okay?
>>>>>>>>>>>>>>>             What about BP? I can do IC
>>>>>>>>>>>>>>>                   from the CC term, but that is not  
>>>>>>>>>>>>>>> direct
>>>>>>>>>>>>>>> experimental
>>>>>>>>>>>>>>>             evidence. What do you all
>>>>>>>>>>>>>>>                   think?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>                   Thanks for your time,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>                   Rama
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>                    
>>>>>>>>>>>>>>> _______________________________________________
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