[maker-devel] multiple overlapped snoRNA genes got annotated by maker

[Michael Campbell]

Hi Jia-Xing,

That has been my experience in the past as well. For the non-coding RNAs tRNA-scan is very accurate while snoscan seems to be quite sensitive but very specific. Did you give it a “snoscan_meth” file? Giving it a snoscan_meth file will help with accuracy. The biggest gains in accuracy are from small RNA-seq data. In the paper where we used snoscan on maize we didn’t keep any snoRNA predictions that didn’t have support from small RNA-seq data, in practical terms we got rid of anything with a AED of 1.

I hope this helps,
Mike
> On May 15, 2017, at 7:28 AM, Jia-Xing Yue <yuejiaxing at gmail.com> wrote:
> 
> Hello,
> 
> I configured snoscan (v.0.9.1) for my maker installation (v2.31.9) and run the annotation for a yeast (S. cerevisiae) genome. I think the annotation went well with regard to tRNAs and protein-coding genes but I am not sure about snoRNAs. I found multiple overlapped snoRNA genes were annotated by maker as the example below shows. I was wondering if this is expected. If not, what might have caused this problem and is there a way to work around. Thanks in advance!
> 
> chrIX   maker   gene    4328    4416    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.49;Name=snoscan-chrIX-noncoding-gene-0.49
> chrIX   maker   snoRNA  4328    4416    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.49-snoRNA-1;Parent=snoscan-chrIX-noncoding-gene-0.49;Name=snoscan-chrIX-noncoding-gene-0.49-snoRNA-1;_AED=1.00;_eAED=1.00;_QI=0|-1|0|0|-1|0|1|90|0
> chrIX   maker   exon    4328    4416    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.49-snoRNA-1:exon:12260;Parent=snoscan-chrIX-noncoding-gene-0.49-snoRNA-1
> chrIX   maker   gene    4375    4563    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.50;Name=snoscan-chrIX-noncoding-gene-0.50
> chrIX   maker   snoRNA  4375    4563    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.50-snoRNA-1;Parent=snoscan-chrIX-noncoding-gene-0.50;Name=snoscan-chrIX-noncoding-gene-0.50-snoRNA-1;_AED=1.00;_eAED=1.00;_QI=0|-1|0|0|-1|0|1|190|0
> chrIX   maker   exon    4375    4563    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.50-snoRNA-1:exon:12261;Parent=snoscan-chrIX-noncoding-gene-0.50-snoRNA-1
> chrIX   maker   gene    4375    4461    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.51;Name=snoscan-chrIX-noncoding-gene-0.51
> chrIX   maker   snoRNA  4375    4461    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.51-snoRNA-1;Parent=snoscan-chrIX-noncoding-gene-0.51;Name=snoscan-chrIX-noncoding-gene-0.51-snoRNA-1;_AED=1.00;_eAED=1.00;_QI=0|-1|0|0|-1|0|1|88|0
> chrIX   maker   exon    4375    4461    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.51-snoRNA-1:exon:12262;Parent=snoscan-chrIX-noncoding-gene-0.51-snoRNA-1
> chrIX   maker   gene    4375    4491    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.52;Name=snoscan-chrIX-noncoding-gene-0.52
> chrIX   maker   snoRNA  4375    4491    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.52-snoRNA-1;Parent=snoscan-chrIX-noncoding-gene-0.52;Name=snoscan-chrIX-noncoding-gene-0.52-snoRNA-1;_AED=1.00;_eAED=1.00;_QI=0|-1|0|0|-1|0|1|118|0
> chrIX   maker   exon    4375    4491    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.52-snoRNA-1:exon:12263;Parent=snoscan-chrIX-noncoding-gene-0.52-snoRNA-1
> chrIX   maker   gene    4375    4500    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.53;Name=snoscan-chrIX-noncoding-gene-0.53
> chrIX   maker   snoRNA  4375    4500    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.53-snoRNA-1;Parent=snoscan-chrIX-noncoding-gene-0.53;Name=snoscan-chrIX-noncoding-gene-0.53-snoRNA-1;_AED=1.00;_eAED=1.00;_QI=0|-1|0|0|-1|0|1|127|0
> chrIX   maker   exon    4375    4500    .       +       .       ID=snoscan-chrIX-noncoding-gene-0.53-snoRNA-1:exon:12264;Parent=snoscan-chrIX-noncoding-gene-0.53-snoRNA-1
> 
> Best,
> Jia-Xing
> 
> 
> -- 
> Jia-Xing Yue 
> 
> Population Genomics and Complex Traits Group
> Tour Pasteur 8eme etage
> Faculté de Médecine
> Institute for Research on Cancer and Aging, Nice (IRCAN)
> CNRS UMR 7284 - INSERM U 1081 - Université Côte d’Azur (UCA)
> 28 Avenue de Valombrose
> 06107 NICE Cedex 2
> France
> 
> Personal website: http://www.iamphioxus.org/ <http://www.iamphioxus.org/>
> 
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