Hi Thomas,<br>
Sorry for the delay in responding, but thanks much for the reply.<br>
<br>
Well I have 2000 sets of orthologous sequences
for these 8 species. And their phylogenetic distance is quite well
known.<br>
So actually it would be more useful to use the phylogenetic
information, and then perform alignments to pick out Transcription factor binding sites, or be more
confident of finding TFBS, etc.<br>
<br>
I hope to have explained it better .. would you have any suggestions in this regard !<br>
<br>
Cheers,<br>
Samantha<br>
<br><br><div><span class="gmail_quote">On 10/22/05, <b class="gmail_sendername">Thomas Keane</b> <<a href="mailto:thomas.m.keane@nuim.ie">thomas.m.keane@nuim.ie</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I'd advise downloading your own copy of phyml and running it on your<br>computer - there is a link to download a copy somewhere on the website.<br>You should note that phyml only recognises phylip format files. Its<br>basically software for building phylogenetic trees from a group of
<br>alignments.<br><br>I havent used MEME - what we do in our lab is run Clustalw to align the<br>sequences then GBlocks to remove any badly aligned areas<br>(<a href="http://molevol.ibmb.csic.es/Gblocks/Gblocks.html">http://molevol.ibmb.csic.es/Gblocks/Gblocks.html
</a>) then modelgenerator<br>to get the ML model then phyml to get our bootstrapped trees :-)<br><br>Thomas<br><br>Samantha Fox wrote:<br><br>> Dear Thomas,<br>> Thanks for the response. I could use the ModelGenerator, but PHYML
<br>> online execution gave some error. I will also have to read their<br>> paper, to see what exactly the software does .... and what I should<br>> expect as output.<br>><br>> One simple thing I did was run MEME on each ortholog set, and the
<br>> blocks come out nicely conserved ... sequentially as well. However I<br>> was not sure of what next, and didnt go further.<br>> Another task was to run clustalw on each ortholog set separately and<br>> see what sequences come out conserved in majority sets, etc.. Most
<br>> results again were repitition of known .. so not really interesting ...<br>><br>> Any comments on this ....... or some other ideas ???<br>><br>> Cheers ...<br>> Samantha<br>><br>> On 10/21/05, *Thomas Keane* <
<a href="mailto:thomas.m.keane@nuim.ie">thomas.m.keane@nuim.ie</a><br>> <mailto:<a href="mailto:thomas.m.keane@nuim.ie">thomas.m.keane@nuim.ie</a>>> wrote:<br>><br>> If you want to use maximum likelihood then I would suggest that
<br>> you use<br>> Phyml (<a href="http://atgc.lirmm.fr/phyml/">http://atgc.lirmm.fr/phyml/</a>) - you can download your own copy.<br>> You will also need to find the optimal ML model first - you could use
<br>> Modelgenerator (<a href="http://bioinf.nuim.ie/software/modelgenerator">http://bioinf.nuim.ie/software/modelgenerator</a>) to do<br>> this as it creates scripts to start Phyml with the optimal model.<br>
><br>> Thomas<br>><br>> Samantha Fox wrote:<br>><br>> > Hii...<br>> > I am looking for various options to analyze a set of few hundered bp<br>> > long orthologous sequences from a group of phylogenetically related
<br>> > species. Its like 5-8 homologous promoter dna sequences per gene<br>> for<br>> > around thousand genes. The motivation is to get the conserved motifs<br>> > which have remained constant under selection.
<br>> ><br>> > What can be the best ways to do this analysis, I looked at some<br>> > phylogenetic tools, but most have limitations like web-based,<br>> just 2<br>> > sequences, etc.
<br>> ><br>> > All your suggestions... and anyone experienced with similar<br>> stuff. ...<br>> > I welcome it all...<br>> ><br>> > Thanks.<br>> > Samantha
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