Hi Valerie,

To confirm, you are using "Fetch Sequences -> Extract Genomic DNA" with the "Locally cashed" ce4 genome?


If so, you may be able to solve this issue by correcting the chromosome names. They have to match exactly with what is in the native genome. Specifically, error message your shared, changing "Chr1" to be "chrI" will probably fix the issue.

To see what the chromosome names are for ce4, please see this history.
http://main.g2.bx.psu.edu/u/jen-bx-galaxy-edu/h/ce4-chrominfo

Since the genome came from UCSC, I was able to pull a special table from the Table browser, called "chromInfo", that lists out the names in an easy format.

The scientific notation may also be an issue with some tools, but unlikely with this particular operation.

Please let us know if you need more help. Sharing a link to your history with the problem input/output identified would be helpful if we need to look at this in more detail (Use "Options -> Share or Publish" and email back the link, noting the problem datasets.)

Best,

Jen
Galaxy team

On 2/18/11 9:07 AM, Valerie Reinke wrote:
Dear Galaxy expert:

I have recently been using Galaxy and have been thrilled with its
utility and ease. Thank you very much! I have one question - I am trying
to fetch sequences (for C. elegans ce4 genome) for intervals in a tab
delimited file that has been used successfully as an interval file for
other types of Galaxy queries (attached). However, when I try to fish
out the sequences associated with these intervals (for MEME analysis), I
get empty returns, and the same warning (below). Where is it getting the
544 from? What do I need to do to make it read the file correctly? I
tried file conversion, getting rid of the extra columns, and changing
the chromosomes to I, II, III, etc (the canonical names in the worm
field), and nothing seems to do the trick. Any suggestions would be helpful.

Thanks!

Valerie

Warning message:

empty
format: fasta, database: ce4

Info: 2720 warnings, 1st is: Unable to fetch the sequence from '3525' to
'544' for build 'ce4'.
Skipped 2720 invalid lines, 1st is #1, "Chr1 3525 4069 281 21 3.25E-58"

------------------------------------------------

Valerie Reinke

Associate Professor

Dept Genetics

Yale University School of Medicine

203-785-5228

valerie.rei...@yale.edu



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