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Caenorhabditis elegans assembly and gene annotation


Genome sequence and annotation have been imported from the WS260 release of WormBase (which includes the WBcel235 version of the C.elegans reference genome). Included are annotated operons, genes, transcripts and translations, as well as RNAi and BLAST/BLAT homology data. In addition Affymetrix and Agilent cross references for C.elegans expression arrays have been added.

We include C.elegans in Ensembl (and also Ensembl Genomes) to allow people to access the data through the Ensembl user interface (both for visualisation and data mining) and to provide cross-species integration through our comparative genomics resources (such as homologous gene links and protein family pages).

The genome assembly represented here corresponds to Genome Assembly ID GCA_000002985.3

Gene annotation

This species and other invertebrates are also available from our sister site, Ensembl Metazoa

More information

General information about this species can be found in Wikipedia.



AssemblyWBcel235, INSDC Assembly GCA_000002985.3, Dec 2012
Base Pairs103,022,290
Golden Path Length100,286,401
Annotation providerWormBase
Annotation methodImport
Genebuild startedJun 2017
Genebuild releasedOct 2014
Genebuild last updated/patchedJun 2017
Database version94.260

Gene counts

Coding genes20,222
Non coding genes24,765
Small non coding genes24,493
Long non coding genes272
Gene transcripts61,109

About this species