Cited by 267RNA Research and SplicingGenomics and Chromatin DynamicsCancer-related molecular mechanisms research

Intragenic Enhancers Act as Alternative Promoters

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Kowalczyk, Monika S., Hughes, Jim R., Garrick, David, Lynch, Magnus D., Sharpe, Jacqueline A., Sloane-Stanley, Jacqueline A., McGowan, Simon J., De Gobbi, Marco +12 more·2012·Molecular Cell

Abstract

A substantial amount of organismal complexity is thought to be encoded by enhancers which specify the location, timing, and levels of gene expression. In mammals there are more enhancers than promoters which are distributed both between and within genes. Here we show that activated, intragenic enhancers frequently act as alternative tissue-specific promoters producing a class of abundant, spliced, multiexonic poly(A)(+) RNAs (meRNAs) which reflect the host gene's structure. meRNAs make a substantial and unanticipated contribution to the complexity of the transcriptome, appearing as alternative isoforms of the host gene. The low protein-coding potential of meRNAs suggests that many meRNAs may be byproducts of enhancer activation or underlie as-yet-unidentified RNA-encoded functions. Distinguishing between meRNAs and mRNAs will transform our interpretation of dynamic changes in transcription both at the level of individual genes and of the genome as a whole.

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Crossref · 10.1016/j.molcel.2011.12.021

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  • Sample sizes were chosen with a view to detecting a 25% reduction in haemoglobin.

    “Sample sized were chosen with a view to detecting a 25% reduction in haemoglobin; smaller confirmatory datasets were obtained where the analysis of phenotype had already been reported (as for R2 and R3 deletions14, 19.”

    From Genetic dissection of the α-globin super-enhancer in vivo (2016) · cites this paper as [14]

  • Intragenic enhancers can act as alternative promoters.

    “Now, there is convincing evidence that promoters can have enhancer activity [72,73,74,75], while intragenic enhancers can act as alternative promoters [76].”

    From Enhancer Function in the 3D Genome (2023) · cites this paper as [76]

  • The observed histone modifications at nonCGI alternative promoters resemble epigenetic features of enhancers.

    “The observed histone modifications at nonCGI alternative promoters resemble epigenetic features of enhancers, as previously observed48.”
  • Activation of α-globin expression in erythroid cells is associated with the appearance of a broad domain of histone acetylation and H3K4me1 spanning ~80kb including the α-globin genes and their regulatory elements.

    “activation of α-globin expression in erythroid cells is associated with the appearance of a broad domain of histone acetylation and modification by H3K4me1 spanning ~80kb including the α-globin genes and their regulatory elements (Fig. 1B)13,14.”

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Authors
Kowalczyk, M. S., Hughes, J. R., Garrick, D., Lynch, M. D., Sharpe, J. A., Sloane-Stanley, J. A., McGowan, S. J., De Gobbi, M., Hosseini, M., Vernimmen, D., Brown, J. M., Gray, N. E., Collavin, L., Gibbons, R. J., Flint, J., Taylor, S., Buckle, V. J., Milne, T. A., Wood, W. G., & Higgs, D. R.
Affiliations
  • University of Oxford (GB)
  • Centre for Human Genetics (GB)
  • University of Trieste (IT)
Corresponding author
Higgs, Douglas R.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2012-02
Volume
45
Issue
4
Pages
447-458
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2133484520
Cited by
267
References
36
Citations by year
2026: 5 · 2025: 16 · 2024: 8 · 2023: 18 · 2022: 10 · 2021: 19 · 2020: 14 · 2019: 16 · 2018: 28 · 2017: 24 · 2016: 24 · 2015: 24 · 2014: 23 · 2013: 25 · 2012: 13
FWCI
10.86
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Research Information System University of Turin (University of Turin) (submittedVersion, other-oa)
  • ArTS Archivio della ricerca di Trieste (University of Trieste https://www.units.it/) (submittedVersion)
Funders
  • National Institute for Health Research
  • Marie Curie (MRTN-CT-2004-005499)
  • Medical Research Council
  • NIHR Oxford Biomedical Research Centre
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
Keywords
intragenic enhancers, alternative promoters, alternative splicing, alternative isoforms, transcriptome complexity, enhancer activation, tissue-specific transcription
MeSH terms
Animals, Cells, Cultured, Enhancer Elements, Genetic, Gene Expression Regulation, Poly A, Promoter Regions, Genetic, RNA, RNA, Messenger, Erythroid Cells, Mice, RNA Isoforms, Transcriptome

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