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What is an Ensembl transcript?
The sequence of any gene or transcript shown in Ensembl is the sequence in the underlying genome assembly, where the sequence of any protein is the translated genomic sequence. This is to prevent any mismatch between the genes and the genome.
How does Ensembl annotate genes?
Ensembl annotation Protein-coding genes are automatically annotated using Ensembl’s genebuild pipeline. All transcripts are based on mRNA and proteins in public scientific databases.
How do you get splicing variants?
Current methods employed in the detection of splice variants include prediction by clustering of expressed sequence tags, exon microarray, and mRNA sequencing, all methods focusing on RNA-level information. There is a lack of tools for analyzing splice variants at the protein level.
What is an Ensembl ID?
Stable identifiers are ways that databases, such as Ensembl, can label the features, such as genes, transcripts, exons or proteins, in their database. The identifiers aim to be unambiguous and consistent across Ensembl releases.
What is Ensembl used for?
Ensembl (http://www.ensembl.org/) is a bioinformatics project to organize biological information around the sequences of large genomes. It is a comprehensive source of stable automatic annotation of individual genomes, and of the synteny and orthology relationships between them.
How many Ensembl genes are there?
There are 21,958 common genes among RefGene, Ensembl, and UCSC annotations. When we compared the gene quantification results in RefGene and Ensembl annotations, 20% of genes are not expressed, and thus have a zero count in both annotations.
How do you detect splicing?
To detect the short splicing isoform, a boundary-spanning primer (BSP) for the sequence encompassing the exon–exon junction with the opposing primer in a constitutive exon can be used. In theory, this strategy should provide unbiased amplification of short splicing isoforms.
How is splicing measured?
Quantification of alternative splicing to detect the abundance of differentially spliced isoforms of a gene in total RNA can be accomplished via RT-PCR using both quantitative real-time and semi-quantitative PCR methods.
What should Ensembl genome version should I use for?
These files contains all sequence regions flagged as toplevel in an Ensembl schema. This includes chromsomes, regions not assembled into chromosomes and N padded haplotype/patch regions. E.g: I used the soft masked assemblies for genome annotation pipelines like MAKER, also toplevel unmasked ones for RNA-seq, ChipSeq analysis
How many genes are duplicated in GENCODE and Ensembl?
At the time of writing (Ensembl 89), a few transcripts differ due to conversion issues. In addition, around 160 PAR genes are duplicated in GENCODE but only once in Ensembl. The differences affect fewer than 1% of the transcripts. Apart from gene annotation itself, the links to external databases differ.
Which is Ensembl version skips lower case letters?
For example, LASTZ skips lower case letters during the seeding stage. These files contains all sequence regions flagged as toplevel in an Ensembl schema. This includes chromsomes, regions not assembled into chromosomes and N padded haplotype/patch regions.
Is the mouse genome the same as the Ensembl genome?
Officially, the Ensembl and GENCODE gene models are the same. On the latest human and mouse genome assemblies (hg38 and mm10), the identifiers, transcript sequences, and exon coordinates are almost identical between equivalent Ensembl and GENCODE versions (excluding alternative sequences or fix sequences ).