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Cacao

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Contributes toGO:0098856intestinal lipid absorptionPMID:30837651ECO:0001175 IMP: Inferred from Mutant PhenotypeBiological Process
The authors generated knockout mice with a deletion in the dennd5b gene (figure 1A). They examined the phenotype of the knockout mice and noted that fasted mice had a larger, more distended small intestine than wild-type (figure 2A, 2B), as well as massive lipid accumulation compared to wild-type (figures 2D and 2E). In addition, plasma triglyceride levels were measured in both knockout and wild-type mice, and the dennd5b knockout mice were shown to have significantly lower levels of both triglycerides and free fatty acids in their blood plasma (figure 2C) than wild-type controls. Overall, the evidence indicates that lack of a functioning dennd5b gene severely impairs the intestinal lipid absorption abilities of mice.
complete
This annotation made on page: MOUSE:DEN5B
By: KAtanasoff (group Team Blue A 2019) on 2019-03-09 15:10:17 CST.



TeamPoints
Team Blue A 20195




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Entry TypeChallenging User,GroupTime/DateChallenge ReasonPoints/Assessment
Public
Assessment
Ivanerill2019-03-27 09:58:52 CDTNo notes given.Acceptable
Protein
Publication
Qualifier
Go term
Evidence
With/From
Notes
Unique/Original
Public
Assessment
DanielRenfro2019-03-25 17:45:45 CDT

This annotation has been flagged because it has been edited since last assessment

Qualifier GO ID GO term name Reference ECO ID ECO term name with/from Aspect Extension Notes Status
GO:1905885 positive regulation of triglyceride transport PMID:30837651 ECO:0005601 IMP: Inferred from Mutant Phenotype P In Figure 2G, there is a significant absence of apoB in dennd5b -/- mice, a protein required for enterocyte absorption of triglycerides (lipids), compared to dennd5b+/+ mice. complete
CACAO 13557
on MOUSE:DEN5B
Flagged
Public
Assessment
DanielRenfro2019-03-25 17:39:00 CDT

This annotation has been flagged because it has been edited since last assessment

Qualifier GO ID GO term name Reference ECO ID ECO term name with/from Aspect Extension Notes Status
GO:1905885 positive regulation of intestinal lipid absorption PMID:30837651 ECO:0005601 IMP: Inferred from Mutant Phenotype P In Figure 2G, there is a significant absence of apoB in dennd5b -/- mice, a protein required for enterocyte absorption of triglycerides, compared to dennd5b+/+ mice. complete
CACAO 13557
on MOUSE:DEN5B
Flagged
Public
Assessment
Ivanerill2019-03-25 12:05:21 CDT

Don't put in a qualifier. Make clear in the note which experiment from Fig. 2 you are basing the annotation on. The authors don't seem to reach the same conclusion you do. They only talk about triacylglyceride (TG) absorption. See if there are alternative terms you can use to further specify this. Justify either way in the notes. For evidence, is transmission electron microscopy the thing that allows them to make the connection between the gene and TG absorption? Again, read the beginning of your notes.

Requires Changes
Protein
Publication
Qualifier
Go term
Evidence
With/From
Notes
Unique/Original
Public
Assessment
DanielRenfro2019-03-25 11:24:26 CDT

This annotation has been flagged because it has been edited since last assessment

Qualifier GO ID GO term name Reference ECO ID ECO term name with/from Aspect Extension Notes Status
incorrect (CACAO) GO:1904731 positive regulation of intestinal lipid absorption PMID:30837651 ECO:0007044 IMP: Inferred from Mutant Phenotype P note: qualifier should be ENABLES, but cannot change it

Lipid absorption in enterocytes in Dennd5 -/- mice were compared with Dennd5b +/+ mice using transmission electron microscopy at 1 hour (Fig. 2H, I), 2 hours (Fig. 2J, K) and after an overnight fasting period (Fig 2L, M). In Dennd5b -/- mice, significant accumulation of lipids is observed after all three time periods (1h, 2h and overnight)||complete
CACAO 13557

on MOUSE:DEN5B
Flagged
Public
Assessment
DanielRenfro2019-03-25 11:22:42 CDT

This annotation has been flagged because it has been edited since last assessment

Qualifier GO ID GO term name Reference ECO ID ECO term name with/from Aspect Extension Notes Status
incorrect (CACAO) GO:1904731 cholesterol homeostasis PMID:30837651 ECO:0007044 IMP: Inferred from Mutant Phenotype P note: qualifier should be ENABLES, but cannot change it

Lipid absorption in enterocytes in Dennd5 -/- mice were compared with Dennd5b +/+ mice using transmission electron microscopy at 1 hour (Fig. 2H, I), 2 hours (Fig. 2J, K) and after an overnight fasting period (Fig 2L, M). In Dennd5b -/- mice, significant accumulation of lipids is observed after all three time periods (1h, 2h and overnight) ||complete
CACAO 13557

on MOUSE:DEN5B
Flagged
Public
Assessment
Ivanerill2019-03-24 16:02:42 CDT

See http://geneontology.org/docs/go-annotations/ for the use of Contribute to qualifier. Not use in Biological Process.

I don't see any support for this protein being involved in GO:0042632 "cholesterol homeostasis" in the paper, nor do the authors state so. And you don't indicate this in the note, so it is probably not the right GO term?

Is "gel-filtration" the evidence that is being use to prove that the gene is involved in cholesterol homeostasis (or whatever it is)? That is, how do the authors establish the causal link between the gene and the effect? Read the beginning of your notes.

And when you make your case, stay focused. Your notes mention several different experiments from the same figure. You need to identify which is the experiment that establishes your annotation. You can then refer to the rest as additional support, but not as the rationale for your annotation.

Requires Changes
Protein
Publication
Qualifier
Go term
Evidence
With/From
Notes
Unique/Original
Public
Assessment
DanielRenfro2019-03-24 10:26:21 CDT

This annotation has been flagged because it has been edited since last assessment

Qualifier GO ID GO term name Reference ECO ID ECO term name with/from Aspect Extension Notes Status
Contributes to GO:0042632 cholesterol homeostasis PMID:30837651 ECO:0001184 IMP: Inferred from Mutant Phenotype P The 19 bp deletion (fig. 1A) creates a loss-of-function mutation in the dennd5 gene. Test subjects then had their total cholesterol and phosphotidylcholine levels analyzed using size-exclusion liquid chromatography (Fig 1E, F). Homozygous recessive knockout mice had a decrease in total cholesterol and phosphatidylcholine levels that was determined to be statistically significant. complete
CACAO 13557
on MOUSE:DEN5B
Flagged
Public
Assessment
Ivanerill2019-03-13 09:20:31 CDT

Need to focus on a figure (i.e. experiment) that supports a specific assertion, and make that the GO and the ECO. Not summarize the whole paper. As it is, it is impossible to judge what evidence is being used, where and to show what. Eukaryotic annotation is NOT allowed from now on in Phage Hunters CACAO.

Please use the cross-linked evidence terms from ECO (i.e. those that end in "used in manual assertion" or "used in automatic assertion") Most instances of evidence you will come across will be of type "used in manual assertion". Terms with "used in automatic assertion" imply that the authors did not make a conscious effort to analyze the results of an experiment, letting an algorithm make the call. For instance, if somebody were to use BLAST to determine that a bunch of proteins are homologous (and hence have the same function as the query) and they do not assess the BLAST results in any way (just accept whatever BLAST returns as significant given a preestablished threshold) that could be thought of as an "automatic assertion".

Requires Changes
Protein
Publication
Qualifier
Go term
Evidence
Notes
Unique/Original
Private
Assessment
Ivanerill2019-03-09 16:07:22 CSTYou need to be an instructor to view these notes.Requires Changes
Protein
Publication
Qualifier
Go term
Evidence
Notes
Unique/Original