geneontology / go-ontology

Source ontology files for the Gene Ontology
http://geneontology.org/page/download-ontology
Creative Commons Attribution 4.0 International
220 stars 40 forks source link

Add missing children to 'ATP-dependent activity' #21619

Closed pgaudet closed 2 years ago

pgaudet commented 3 years ago

Terms with labels 'ATP-dependent x':

Look at separately

pgaudet commented 3 years ago
pgaudet commented 3 years ago
alanbridge commented 3 years ago

Not sure if it's a good idea to merge the ATP and CTP forms of this reaction.

(2E,6E)-farnesol + CTP = (2E,6E)-farnesyl phosphate + CDP + H(+) (2E,6E)-farnesol + ATP = (2E,6E)-farnesyl phosphate + ADP + H(+)

I seem to remember the rat enzyme uses CTP not ATP, plant uses both. I guess we may find species that only use ATP later. Why not do a CTP-dependent and an ATP-dependent GO term?

'ATP-dependent farnesol kinase activity' 'CTP-dependent farnesol kinase activity'

or even

'ATP-dependent (2E,6E)-farnesol kinase activity' 'CTP-dependent (2E,6E)-farnesol kinase activity'

pgaudet commented 3 years ago

OK - Paul and I thought we should merge because EC describes the CTP version, and states "The enzyme, found in plants and animals, can also use other nucleotide triphosphates as phosphate donor, albeit less efficiently. "

https://enzyme.expasy.org/EC/2.7.1.216

I'll look for more evidence.

pgaudet commented 3 years ago

The difference between plant and human seems to be the substrate, not the nucleoide used, according to the same EC entry: "The plant enzyme can also use geraniol and geranylgeraniol as substrates with lower activity, but not farnesyl phosphate (cf. EC 2.7.4.32). "

alanbridge commented 3 years ago

I was kind of worried we would have to demerge these later and remap to the 2 Rheas. I scanned the article on rat, fig 5 shows activity only for CTP there: https://reader.elsevier.com/reader/sd/pii/S0003986198906117?token=4FC6B771CD1EB4F58D921BC03E3479BC8241708875C512B62DE0059C634C98E04EA09C7DA9CC387F94125C52723266A3&originRegion=eu-west-1&originCreation=20210618115956.

I would be interested to know why this kinase is using CTP but I'm in meetings all afternoon so can't follow it up! There must be something to that though. This alone might be a good reason for a CTP-specific term?

pgaudet commented 3 years ago

We now have 2 terms for farnesol kinase activity:

GO:0052668 -name: farnesol kinase activity +name: CTP:farnesol kinase activity RHEA: 51680


id: GO:0102237 -name: ATP-dependent farnesol kinase activity +name: ATP:farnesol kinase activity RHEA:61656

both cite the plant paper PMID:21395888

Looks like the tobacco gene is specific for CTP (PMID:10557276) and the Arabidosis gene can use other nucleotides

image

So I will keep both terms.

alanbridge commented 3 years ago

thanks!

pgaudet commented 3 years ago
pgaudet commented 3 years ago