Cited by 648Genomics and Phylogenetic StudiesRNA Research and SplicingGenomics and Chromatin Dynamics

GENCODE: producing a reference annotation for ENCODE

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Harrow, Jennifer, Denoeud, France, Frankish, Adam, Reymond, Alexandre, Chen, Chao-Kung, Chrast, Jacqueline, Lagarde, Julien, Gilbert, James GR +7 more·2006·Genome Biology

Abstract

Background: The GENCODE consortium was formed to identify and map all protein-coding genes within the ENCODE regions. This was achieved by a combination of initial manual annotation by the HAVANA team, experimental validation by the GENCODE consortium and a refinement of the annotation based on these experimental results. Results: The GENCODE gene features are divided into eight different categories of which only the first two (known and novel coding sequence) are confidently predicted to be protein-coding genes. 5' rapid amplification of cDNA ends (RACE) and RT-PCR were used to experimentally verify the initial annotation. Of the 420 coding loci tested, 229 RACE products have been sequenced. They supported 5' extensions of 30 loci and new splice variants in 50 loci. In addition, 46 loci without evidence for a coding sequence were validated, consisting of 31 novel and 15 putative transcripts. We assessed the comprehensiveness of the GENCODE annotation by attempting to validate all the predicted exon boundaries outside the GENCODE annotation. Out of 1,215 tested in a subset of the ENCODE regions, 14 novel exon pairs were validated, only two of them in intergenic regions. Conclusion: In total, 487 loci, of which 434 are coding, have been annotated as part of the GENCODE reference set available from the UCSC browser. Comparison of GENCODE annotation with RefSeq and ENSEMBL show only 40% of GENCODE exons are contained within the two sets, which is a reflection of the high number of alternative splice forms with unique exons annotated. Over 50% of coding loci have been experimentally verified by 5' RACE for EGASP and the GENCODE collaboration is continuing to refine its annotation of 1% human genome with the aid of experimental validation.

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Crossref · 10.1186/gb-2006-7-s1-s4

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  • Recurrent rearrangements implicated in genomic disorders are hypothesized to be associated with local genome architecture, such as segmental duplications that facilitate non-allelic homologous recombination.

    “Recurrent rearrangements, implicated in genomic disorders, are hypothesized to be associated with local genome architecture44, e.g., with segmental duplications that facilitate NAHR.”
  • The analysis revealed a map of structural-variant hotspots that may constitute local centers of de novo structural-variant formation, consistent with local genome architecture contributing to genomic instability.

    “our analysis revealed a map of SV hotspots that may constitute local centers of de novo SV formation, consistent with the concept that local genome architecture contributes to genomic instability44.”
  • A large percentage of common differentially expressed transcripts (48%, or 5,500 probes) are poorly annotated, including probes not mapped to the human genome, mapped to contig sequences, or not mapped to known GENCODE genes.

    “a large percentage of these common differentially expressed transcripts (48%, or 5,500 probes) are poorly annotated, including probes not mapped to the human genome (HG19; http://genome.ucsc.edu/cgi-bin/hgGateway), mapped to contig sequences, or not mapped to known GENCODE genes21.”

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Authors
Harrow, J., Denoeud, F., Frankish, A., Reymond, A., Chen, C.-K., Chrast, J., Lagarde, J., Gilbert, J. G., Storey, R., Swarbreck, D., Rossier, C., Ucla, C., Hubbard, T., Antonarakis, S. E., & Guigo, R.
Affiliations
  • Wellcome Sanger Institute (GB)
  • University of Geneva (CH)
  • University of Lausanne (CH)
  • Universitat Pompeu Fabra (ES)
Corresponding author
Harrow, Jennifer
Venue
Genome Biology
Published
2006-08-07
Volume
7
Issue
S1
Pages
S4.1-9
ISSN
  • 1465-6906 (ISSN-L)
  • 1474-760X
OpenAlex
W2169674658
Cited by
648
References
38
Citations by year
2026: 11 · 2025: 18 · 2024: 23 · 2023: 23 · 2022: 26 · 2021: 43 · 2020: 27 · 2019: 27 · 2018: 33 · 2017: 31 · 2016: 36 · 2015: 37 · 2014: 34 · 2013: 49 · 2012: 71
FWCI
11.41
Type
journal article
Language
en
Open access
Locations
  • Genome biology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
  • IRIS (submittedVersion)
  • RECERCAT (Consorci de Serveis Universitaris de Catalunya) (submittedVersion, other-oa)
  • Hispana (submittedVersion, other-oa)
  • Research Portal (King's College London) (submittedVersion, other-oa)
  • Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion, cc-by)
  • SERVAL (Université de Lausanne) (submittedVersion, other-oa)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Funders
  • National Science Foundation
  • European Commission
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
  • National Human Genome Research Institute (U24HG007234)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
GENCODE, ENCODE, human genome annotation, protein-coding genes, novel exons, alternative splicing, splice variants, 5' RACE, RT-PCR validation, novel transcripts
MeSH terms
Chromosome Mapping, Genes, Humans, Proteins, Pseudogenes, Reference Standards, RNA, Messenger, Genome, Human, Sequence Analysis, DNA, Sequence Analysis, RNA, Computational Biology, Expressed Sequence Tags, Genomics

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