Good Morning Oz:

To preserve the structure of the TopHat output format, use the option: 
-bedPlus=8
on your liftOver command line.

Your input example:
chr20 199843 204678 JUNC00000001 5 - 199843 204678 255,0,0 2 65,70 0,4765
chr20 205740 205898 JUNC00000002 3 - 205740 205898 255,0,0 2 46,32 0,126

Becomes:
chr20 199843 204678 JUNC00000001 5 - 199843 204678 255,0,0 2 65,70 0,4765
chr20 205740 205898 JUNC00000002 3 - 205740 205898 255,0,0 2 46,32 0,126

liftOver -bedPlus=8 yourInput.bed hg18ToHg19.over.chain.gz hg19Output.bed 
unmapped.txt

--Hiram

oz solomon wrote:
> Dear UCSC team members,
> 
> I love to use the UCSC genome browser and all your tools.
> I think you do wonderful job helping the genome community.
> Recently I used the liftOver utility to take tophat bed file from hg18
> coordinates to hg19 coordinates.
> After comparing the two files, I noticed that the hg19 bed file doesn't have
> the colour field in proper format and also there are some additional "," at
> the ends of fields 11,12.
> 
> For example:
> 
> The hg18 bed file (input for liftOver):
> 
> track name=junctions description="TopHat junctions"
> chr20    199843    204678    JUNC00000001    5    -    199843    204678
> 255,0,0    2    65,70    0,4765
> chr20    205740    205898    JUNC00000002    3    -    205740    205898
> 255,0,0    2    46,32    0,126
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