Description

The RefSeq mRNAs gene track for the 15 Jul 2021 Chelonia mydas/GCA_015220195.2_rCheMyd1.alt.v2 genome assembly displays translated blat alignments of vertebrate and invertebrate mRNA in GenBank.

Data Access

Download GCA_015220195.2_rCheMyd1.alt.v2.xenoRefGene.gtf.gz GTF file.

Track statistics summary

Total genome size: 1,896,142,417
Gene count: 13,635
Bases in genes: 549,097,724
Percent genome coverage: % 28.959

Methods

The mRNAs were aligned against the Chelonia mydas/GCA_015220195.2_rCheMyd1.alt.v2 genome using translated blat. When a single mRNA aligned in multiple places, the alignment having the highest base identity was found. Only those alignments having a base identity level within 1% of the best and at least 25% base identity with the genomic sequence were kept.

Specifically, the translated blat command is:

blat -noHead -q=rnax -t=dnax -mask=lower target.fa query.fa target.query.psl

where target.fa is one of the chromosome sequence of the genome assembly,
and the query.fa is the mRNAs from RefSeq
The resulting PSL outputs are filtered:
pslCDnaFilter -minId=0.35 -minCover=0.25  -globalNearBest=0.0100 -minQSize=20 
  -ignoreIntrons -repsAsMatch -ignoreNs -bestOverlap 
    all.results.psl GCA_015220195.2_rCheMyd1.alt.v2.xenoRefGene.psl
The filtered GCA_015220195.2_rCheMyd1.alt.v2.xenoRefGene.psl is converted to genePred data to display for this track.

Credits

The mRNA track was produced at UCSC from mRNA sequence data submitted to the international public sequence databases by scientists worldwide.

References

Benson DA, Cavanaugh M, Clark K, Karsch-Mizrachi I, Lipman DJ, Ostell J, Sayers EW. GenBank. Nucleic Acids Res. 2013 Jan;41(Database issue):D36-42. PMID: 23193287; PMC: PMC3531190

Benson DA, Karsch-Mizrachi I, Lipman DJ, Ostell J, Wheeler DL. GenBank: update. Nucleic Acids Res. 2004 Jan 1;32(Database issue):D23-6. PMID: 14681350; PMC: PMC308779

Kent WJ. BLAT - the BLAST-like alignment tool. Genome Res. 2002 Apr;12(4):656-64. PMID: 11932250; PMC: PMC187518