Hello Smitha,

The best course of action depends upon what type of data you have. If 
you have complete RNA sequences you could input these to our BLAT tool 
(http://genome.ucsc.edu/cgi-bin/hgBlat) and select "psl" as your output 
type. Note that BLAT isn't really optimized for cross-species alignments.

Once you have the output in psl format you can copy and paste this 
output directly into the custom track tool here 
(http://genome.ucsc.edu/cgi-bin/hgCustom). For more information on the 
PSL format you can read our FAQ here:

http://genome.ucsc.edu/FAQ/FAQformat.html#format2

On the other hand, if you have short-read data, then you might be better 
off using a short-read aligner such as BWA, possibly followed by 
TopHat/Cufflinks and viewing alignments as a BAM custom track. This 
process is beyond the scope of this mailing list but there are standard 
workflows for this and you can find support here as a start: seqanswers.com

If you have RNA-seq data for other species mapping short reads to human 
probably won't work very well. One possibility: You could use a standard 
RNA-seq mapping flow to the genomes of the other organisms, translate 
the results to PSL, and then use pslMap (one of the utilities in the the 
kent source tree) with a .over.chain file to make a PSL for human. You 
can read more about obtaining and using our source tree here:

http://hgdownload.cse.ucsc.edu/downloads.html#source_downloads

Best regards,

Pauline Fujita
UCSC Genome Bioinformatics Group
http://genome.ucsc.edu



On 3/7/12 9:46 AM, Smitha Pulukuri wrote:
> Hi
>
> If I have the FASTA sequence then how can we convert the data to build a 
> custom track.Please let me know.
>
> Thanks
> Smitha
>
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