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Fisher Pricing

Ok the title is the term my mate uses for what he has to do for me to understand databases :) I really liked the 'pictures' they had on a Dominant White site explaining which introns/exons of KIT where affected and how. I would like to do the same for some other genes/colours as I find visual aids really useful but am having trouble finding out how many exons there are at the loci, I have found out which exon is the start of the mutation for a lot of the colours but am having trouble finding out how many there are. E.g. the e extension mutation is a missense mutation of exon 1 of MCR1 on EAC3 but I'm not sure how many exons there are in MCR1. Grey is a duplication (4.6 kilobases) in intron 6 of gene syntaxin 17 (STX17) but I don't know how many exons there are on STX17. Anyone know the answer/know where I can find out?

nerd Fri, 06/04/2010 - 11:12

Obviously horsegen will give you a better answer, but in the meantime you could go to
[url]http://genome.ucsc.edu/cgi-bin/hgGatewa…]
select "horse" under genome, and enter the name of the gene in the "position or search term" box.
For example if you search for EDNRB the first hit you get is endothelin B receptor precursor, the gene mutated in frame. If you click on the first hit, you get a diagram of the gene. This stuff -<-<-<- is intron, fat line is exon, and skinnier line is untranslated part of exon (not spliced out like intron but doesn't code for protein).
Hope this helps.

horsegen Fri, 06/04/2010 - 17:53

For identifying exons, my favorite database is Ensemble Genome Browser:

http://uswest.ensembl.org/index.html" onclick="window.open(this.href);return false;

Go to the link, then select "Horse" from the drop down menu at the top left. In the box next to the menu, type the name of the gene you want (like EDNRB) and click go. You will get a Results Summary, and click on the link that says "Gene" under "By Feature Type", then click "Equus Caballus". (I have no idea why they have you click so many things.) That will bring up a link to the gene. Click on that, and you'll get to a summary page for the gene. In the box-type thing at the top, click on the link under "Transcript ID".

Now you're in a page where you can look at the transcript of the gene. There's lots you can do--see the menu at the left of your screen. You'll see under "sequence" that it says "Exons" and gives you the number of them. If all you want is to know the number of exons, you can quit right now! Or you can click on Exons and it will actually show you the sequence of all of them. You might care about that if you want to see exactly where a mutation occurs, for example.

lillith Sat, 06/05/2010 - 05:49

awesome, thanks guys

No I have to spend a few days working out how to read them :) lol.

I did mention fisher pricing didn't I?

Jenks Sat, 06/05/2010 - 07:03

LOL - It's not like the video from Jurassic Park!

I can search using a wildcard and get too many hits, but I don't understand why it will let you search on heart disease on a human but not lethal White on a horse - maybe just a matter of getting the right words in, but the visual of it as a graph is not one I'd have thought of. It is helpful though for us visual learners....

The ones that have no mappings found - does that mean they've not been mapped yet?

Jenks Sat, 06/05/2010 - 15:27

At your link! ensembl! I have NO idea how it will be useful to me, but it sure is cool that you have a public database of the mappings! I was trying to check out the chicken part....:D way way outta my league. But maybe when I retire I can go back to school! LOL

horsegen Sat, 06/05/2010 - 15:34

It's actually much more useful to search by genes rather than by phenotype. It can only give you the location of and information on known genes...it is a database put together so that researchers can easily find info on genes they're interested in. So when I think that a particular gene might cause some phenotype I'm interested in, I can pull the sequence for that gene, note where the exons are, and design assays to sequence the coding regions of the gene. Then, when I have the sequence, Ensembl can tell me the protein sequence and show me where mutations I've found would have an effect.

I suggested it to lilith because she was looking for information on genes known to cause particular coat colors...MC1R, ASIP, MATP, EDNRB, KIT...all of those will be easily searchable.

lillith Mon, 06/14/2010 - 06:26

Ok I am probably trying to understand things way beyond me but please be patient :)

ECA3p12

ECA3q21

Do these two phrases mean 'section 12 of ECA3' and 'section 21 of ECA3' and if so what is the significance of 'p' verses 'q'?

lillith Wed, 08/18/2010 - 05:51

Sorry to necro an old thread but I thought it made more sense than starting a new one. I can't seem to find MCR1 and MAPT has 4 different transcripts with different numbers of exons, am I being dense?

On a thankyou so much for that site note horsegen I have found the rest of the information I wanted there :)

If anyone hears a sniff of info about an agouti paper on brown or a paper on pearl comming out I will dance :)

lillith Wed, 08/18/2010 - 06:03

Oh really blonde moment, MCR1 isnt there but oddly enough the correct order of letters MC1R is :oops:

Still kinda confused by 4 transcripts for MAPT ranging from 13 to 17 exons though.

Edited to add - Ensembl has 2 options under KIT one says there are 8 Exons on KIT while the deuncentralstation website shows 21, and the other has 3 transcripts that range from 20-22 exons I am confused.