'Junk DNA' Genetics

Researchers: Almost one in five genes’ coding status is unresolved

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Abstract: Seventeen years after the sequencing of the human genome, the human proteome is still under revision. One in eight of the 22 210 coding genes listed by the Ensembl/GENCODE, RefSeq and UniProtKB reference databases are annotated differently across the three sets. We have carried out an in-depth investigation on the 2764 genes classified as coding by one or more sets of manual curators and not coding by others. Data from large-scale genetic variation analyses suggests that most are not under protein-like purifying selection and so are unlikely to code for functional proteins. A further 1470 genes annotated as coding in all three reference sets have characteristics that are typical of non-coding genes or pseudogenes. These potential non-coding genes also appear to be undergoing neutral evolution and have considerably less supporting transcript and protein evidence than other coding genes. We believe that the three reference databases currently overestimate the number of human coding genes by at least 2000, complicating and adding noise to large-scale biomedical experiments. Determining which potential non-coding genes do not code for proteins is a difficult but vitally important task since the human reference proteome is a fundamental pillar of most basic research and supports almost all large-scale biomedical projects. – (open access) Federico Abascal David Juan Irwin Jungreis Laura Martinez Maria Rigau Jose Manuel Rodriguez Jesus Vazquez Michael L Tress, Loose ends: almost one in five human genes still have unresolved coding status, Nucleic Acids Research, gky587, https://doi.org/10.1093/nar/gky587More.

Notice: Genetic fundamentalism has been moved to the museum.

Hat tip: Pos-darwinista

See also: Do all genes affect every complex trait? Veronique Greenwood: The roots of many traits, from how tall you are to your susceptibility to schizophrenia, are far more tangled. In fact, they may be so complex that almost the entire genome may be involved in some way

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