Random ramblings about some random stuff, and things; but more stuff than things -- all in a mesmerizing and kaleidoscopic soapbox-like flow of words.
- Very few anolis proteins and cDNAs, many more ESTs.
- Used Uniprot PE Evidence ranking to generate transcript models with genewise
- Different parameters for Exonerate, including exhaustive option for cDNAs, including 31000 chicken set (which wasn't very useful in the end)
- Chris Ponting group provided extra models and kill list to rename some retrotransposons and pseudogenes
- Manually looked at some of the EST genes in Chris' list to reincorporate them in the main db
Word of advise to all Genome Sequencing Centers out there: now that RNAseq is cheap and powerful, please allocate some of your budget for that instead of spending all in genomic sequencing. Contact Sanger people for PCR-free sample preparation protocols, which makes a huge difference in terms of avoiding duplicity.
Labels: ensembl, gene prediction, scientific talk
All Ensembl gene predictions for all vertebrate species are based on experimental evidence:
- UniprotKB/Swiss-Prot
- NCBI RefSeq proteins and mRNAs
- UniprotKB/TrEMBL
- EMBL Nucleotide Sequence Archive
Aligning the evidences back to the gene prediction with Exonerate. Types of alignment results:
- perfect
- added start
- longer region
- missing start
- non-matching start
- non-matching region
- shorter region
- ...
Exonerate has an exhaustive mode that takes a lot more time but fixes some of the mini-intron and
mini-exon issues that sometimes occur. Exonerate cdna2genome is very useful for quality checking.
Genebuild now uses head-to-head alignments of genewise and exonerate, and takes the best in each case.
Some cases are still difficult to get right with algorithmic solutions: this is were the curators are needed.
Labels: ensembl, gene prediction, genomics, scientific talk