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Nucleic Acids Res. 2016 Jan 4;44(D1):D746-52. doi: 10.1093/nar/gkv1045. Epub 2015 Oct 19.

Expression Atlas update--an integrated database of gene and protein expression in humans, animals and plants.

Author information

1
European Molecular Biology Laboratory, European Bioinformatics Institute, EMBL-EBI, Hinxton, UK rpetry@ebi.ac.uk.
2
European Molecular Biology Laboratory, European Bioinformatics Institute, EMBL-EBI, Hinxton, UK.
3
Welcome Trust Sanger Institute, Hinxton, UK.
4
Oregon State University, Corvallis, USA.

Abstract

Expression Atlas (http://www.ebi.ac.uk/gxa) provides information about gene and protein expression in animal and plant samples of different cell types, organism parts, developmental stages, diseases and other conditions. It consists of selected microarray and RNA-sequencing studies from ArrayExpress, which have been manually curated, annotated with ontology terms, checked for high quality and processed using standardised analysis methods. Since the last update, Atlas has grown seven-fold (1572 studies as of August 2015), and incorporates baseline expression profiles of tissues from Human Protein Atlas, GTEx and FANTOM5, and of cancer cell lines from ENCODE, CCLE and Genentech projects. Plant studies constitute a quarter of Atlas data. For genes of interest, the user can view baseline expression in tissues, and differential expression for biologically meaningful pairwise comparisons-estimated using consistent methodology across all of Atlas. Our first proteomics study in human tissues is now displayed alongside transcriptomics data in the same tissues. Novel analyses and visualisations include: 'enrichment' in each differential comparison of GO terms, Reactome, Plant Reactome pathways and InterPro domains; hierarchical clustering (by baseline expression) of most variable genes and experimental conditions; and, for a given gene-condition, distribution of baseline expression across biological replicates.

PMID:
26481351
PMCID:
PMC4702781
DOI:
10.1093/nar/gkv1045
[Indexed for MEDLINE]
Free PMC Article

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