Read mapping metrics:
For each single cell RNA sequencing sample the fraction of sequencing reads
mapped to the human genome is shown and of those, the fraction of the reads
that map to one unique genomic locus.
TECtool region classification:
TECtool-inferred probabilities of each novel terminal exon being a terminal
exon (Terminal), a cassette exon (Intermediate), or an intronic region
(Background).
About
The terminal exons of human transcript
isoforms contain 3' untranslated regions (3'UTRs). 3'UTRs harbor
cis-regulatory elements, which play crucial roles in gene expression
regulation by impacting transcript stability, translation and localization.
However, a comprehensive analysis of 3' end sequencing data has revealed
that large numbers of 3' end isoforms are not represented in current
transcript model annotations
(Gruber et al., 2016, Genome Research).
In a previous study we have shown that there exists an abundance of terminal
exons that are expressed in subpopulations of single cells
(Gruber et al., 2018, Nature Methods).
Following up this study we have collected, quality controlled and carefully
curated 47 publicly available datasets that provide full-length transcript
single cell RNA sequencing (scRNA-seq) data covering 61,692 single cell
transcriptomes.
By applying our Terminal Exon Characterization tool,
TECtool, separately to 53,069 high quality scRNA-seq libraries we have now
screened these data to identify so far unknown terminal exons.
Our single
cell-based
Terminal
Exon
Annotation database
(scTEA-db)
provides the results of this annotation efforts. It enables to browse and
filter 68,615 terminal exons identified from 101 cell types, 12,063 of which are
unique and that are not yet part of the current gene annotation.
If you use any data obtained from scTEA-db, please cite:
Miguel Barquin, Ian U. Kouzel,
Beat Ehrmann, Michael Basler & Andreas J. Gruber.
scTEA-db: a comprehensive database of novel terminal exon isoforms identified
from human single cell transcriptomes,
Nucleic Acids Research, 2024,
https://doi.org/10.1093/nar/gkad878
Downloads
Full database (version 1.0,
release date: 20230809) in tsv format:
scTEA-db_v1.0
Description of database column
names:
scTEA-db_v1.0_columns_info
Gene annotation enriched by
previously not annotated terminal exon 3' end isoforms (GTF format):
GRCh38.102_scTEA_db_v1.0
Enriched terminal exon 3' end isoform
annotation (GTF format):
scTEA-db_v1.0
scTEA-db is developed by the
GruberScienceLab. Data analysis and novel terminal exon
discovery is done by Miguel Barquin. The scTEA-db Shiny web application* is
developed and maintained by Ian Kouzel.
* performs best
in Chrome, Firefox and Edge browsers
© 2023
GruberScienceLab | University of Konstanz