17 May 2017

RNAcentral release 7

Overview of RNAcentral release 7
We are happy to announce that the seventh release of RNAcentral is now available. The latest release includes FlyBase, Ensembl, and GENCODE as new Expert Databases as well as updates from ENA, RefSeq, snoPY, HGNC, and PDB. The data are available on the RNAcentral website, via the API, and in the FTP archive.

Welcome FlyBase

Model Organism Databases (MODs) perform invaluable service for the community by annotating genomes of key species, such as worm, yeast, and fly with functional information. RNAcentral already links to four MODs (dictyBase, PomBase, SGD, and WormBase). Starting with this release we also integrate ncRNAs from FlyBase, the database for Drosophila genes and genomes. FlyBase contributed over 13 thousand ncRNA sequences from 12 Drosophila species, with the majority coming from D. melanogaster. You can browse FlyBase sequences or view FlyBase summary page in RNAcentral.

Goodbye Vega, hello Ensembl

Since the first RNAcentral release, the Vega database provided RNAcentral with high quality annotations of human and mouse genomes. Recently, the Vega website has been archived, but the HAVANA team continues producing annotations and makes them available in Ensembl and GENCODE. In this release we retire Vega and begin importing non-coding RNAs from Ensembl, including GENCODE.
Ensembl provides manually curated, experimentally verified gene annotations for human and mouse genomes, as well as comprehensive gene annotations for over 60 other vertebrate genomes. Ensembl releases are built off GENCODE annotations for human and mouse where possible. We have imported release 87 of Ensembl, which contains 346,509 ncRNA sequences from 66 organisms.

Better sequence descriptions

We made improvements to the descriptions that RNAcentral displays for each sequence. We try to select the most informative name from the available descriptions submitted by different sources. Here is an example description, where the new name is much more specific than the old one:
The selected names come from high quality data sources like GENCODE, HGNC, and miRBase. This work is an ongoing process and we are always happy to get feedback on descriptions that could be improved.

Improved genome browser

RNAcentral features a genome browser that shows RNAcentral sequences alongside genes and transcripts from Ensembl or Ensembl Genomes. Now the browser supports deep linking and the URL is continuously updated as you scroll around or switch between species so that you can bookmark your favorite view to come back to it later or share the URL with anyone. For example, here is a link to the mouse Xist gene. The genome browser also received a fresh coat of paint and was updated to the latest version of Genoverse.

Other updates


  • Latest data from RefSeq, PDB, HGNC, and ENA 
  • Rfam families from release 12.2 and select cis-regulatory families (for example, here are SAM riboswitch sequences) 
  • Mouse sequences from snoPY 
  • Chicken, chimp, rat and cow sequences from NONCODE 
  • The GPI file now contains ncRNA types
  • New FTP section for database identifiers. We have added database specific mappings from RNAcentral URS’s to database ids in ftp://ftp.ebi.ac.uk/pub/databases/RNAcentral/releases/7.0/id_mapping/database_mapping. This is a preliminary release of the data and will be refined in the future. The format and contains may change. We are looking for feedback on the current files.

Database growth over time

RNAcentral now contains almost 13 million unique RNA sequences from 25 Expert Databases. There are 760 thousand new distinct ncRNA sequences and 2 million additional cross-references compared to release 6. To see how the RNAcentral database grew over time, explore our interactive charts.

Get in touch

We plan to make the next release available in August, 2017. In the meantime, if you have any feedback please feel free to get in touch by email, on Twitter, or by submitting an issue on GitHub. We look forward to hearing from you!

6 Jan 2017

RNAcentral release 6



To kick off 2017 we are happy to announce that a new version of RNAcentral is now available. The latest release includes official human gene names from the HGNC database as well as new data from ENA, RefSeq, and PDB. The data are available on the RNAcentral website, via the API, and in the FTP archive.

Official human ncRNA gene names from HGNC

Starting from this release, RNAcentral links to ncRNAs from HGNC, which is a database that assigns unique and stable names to human genes. The HGNC gene symbols are the official names for human genes and are widely used in the literature and across many resources. You can find out more about HGNC in this NAR paper.

In addition to gene names, HGNC provides manually curated links to relevant publications and database accessions from RefSeq, Vega, and other resources. We used these accessions to map HGNC identifiers to RNAcentral entries so that each HGNC entry is matched to one RNAcentral sequence. For example, the HGNC entry for HOTAIR corresponds to RefSeq accession NR_003716, which is found in RNAcentral under the identifier URS000075C808.

As a result of this mapping, over 95% of 6,357 HGNC ncRNA genes of the sequences were connected to RNAcentral identifiers using RefSeq, Vega, or gtRNAdb identifiers from HGNC. If none of these were found in RNAcentral, we retrieved sequences for Ensembl genes (where available) using Ensembl REST API and matched them to RNAcentral accessions by sequence identity. Only about 300 HGNC ncRNA entries (<5%) remained unmapped, most of which are piRNA clusters, rRNAs, and snoRNAs. Some of these ncRNAs will be matched to RNAcentral in future releases, as they get integrated in RefSeq and other RNAcentral databases. Other RNAs, such as piRNA clusters, are unlikely to be mapped to RNAcentral because they correspond to a large number of RNA sequences.

Browse ncRNAs from HGNC or view HGNC summary page in RNAcentral.

Database growth over time

RNAcentral now contains almost 11 million unique RNA sequences from 23 Expert Databases. There are 750 thousand new distinct ncRNA sequences and 2 million additional cross-references from ENA, PDB, RefSeq in release 6 compared to release 5. To see how the RNAcentral database grew over time, explore the interactive charts at the RNAcentral stats page.

New NAR paper

If you haven’t seen the latest RNAcentral paper, the final version was published in the 2017 Database Issue of Nucleic Acids Research.

Get in touch

We plan to make the next release available in March, 2017. In the meantime, if you have any feedback please feel free to get in touch by email, on Twitter, or by submitting an issue on GitHub. We look forward to hearing from you!

1 Nov 2016

New paper is out



new RNAcentral paper has been published in Nucleic Acids Research as part of the 2017 Database issue. The paper gives an overview of activities over the last two years since the first RNAcentral release and shows examples of how RNAcentral is used in the wild.

Read the paper at the NAR website and feel free to get in touch with any comments or feedback.

26 Sep 2016

Workshop: Databases for miRNA and lncRNA Biology



Have you ever struggled to find sequences for a non-coding RNA that you read about in a paper? Or have you tried to reconcile conflicting ncRNA annotations from different sources? If so, then this half-day workshop might be for you.

Update: Course notes are now available.

3 Aug 2016

New online training course

Are you interested in RNAcentral but don't know where to start? Do you want to see all the website features in action? A new online training course shows how to use RNAcentral and gives tips for efficiently searching the data.
Also in the course:
  • how to browse ncRNAs by genomic location
  • how to submit data to RNAcentral
  • hands-on exercises and an interactive quiz
Take the course and feel free to let us know if you have any feedback.