Cited by 196Ocular Disorders and TreatmentsGenomics and Chromatin DynamicsDevelopmental Biology and Gene Regulation

Disruption of Autoregulatory Feedback by a Mutation in a Remote, Ultraconserved PAX6 Enhancer Causes Aniridia

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Bhatia, Shipra, Bengani, Hemant, Fish, Margaret, Brown, Alison, Divizia, Maria Teresa, de Marco, Riccardo, Damante, Guiseppe, Grainger, Robert +2 more·2013·The American Journal of Human Genetics

Abstract

The strictly regulated expression of most pleiotropic developmental control genes is critically dependent on the activity of long-range cis-regulatory elements. This was revealed by the identification of individuals with a genetic condition lacking coding-region mutations in the gene commonly associated with the disease but having a variety of nearby chromosomal abnormalities, collectively described as cis-ruption disease cases. The congenital eye malformation aniridia is caused by haploinsufficiency of the developmental regulator PAX6. We discovered a de novo point mutation in an ultraconserved cis-element located 150 kb downstream from PAX6 in an affected individual with intact coding region and chromosomal locus. The element SIMO acts as a strong enhancer in developing ocular structures. The mutation disrupts an autoregulatory PAX6 binding site, causing loss of enhancer activity, resulting in defective maintenance of PAX6 expression. These findings reveal a distinct regulatory mechanism for genetic disease by disruption of an autoregulatory feedback loop critical for maintenance of gene expression through development.

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Crossref · 10.1016/j.ajhg.2013.10.028

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  • In humans, a point mutation within a downstream enhancer controlling PAX6 expression causes the congenital eye malformation aniridia.

    “In humans, a point mutation within a downstream enhancer controlling PAX6 expression causes the congenital eye malformation aniridia [196].”
  • The PAX6 enhancer mutation prevents PAX6 itself from binding to the enhancer.

    “This mutation was found to prevent PAX6 itself from binding to the enhancer [196].”

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Authors
Bhatia, S., Bengani, H., Fish, M., Brown, A., Divizia, M. T., de Marco, R., Damante, G., Grainger, R., van Heyningen, V., & Kleinjan, D. A.
Affiliations
  • Institute of Genetics and Cancer (GB)
  • University of Virginia (US)
  • Istituto Giannina Gaslini (IT)
Corresponding author
Kleinjan, Dirk A.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2013-12
Volume
93
Issue
6
Pages
1126-1134
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2055426186
Cited by
196
References
39
Citations by year
2026: 8 · 2025: 11 · 2024: 16 · 2023: 20 · 2022: 18 · 2021: 24 · 2020: 16 · 2019: 16 · 2018: 19 · 2017: 8 · 2016: 21 · 2015: 11 · 2014: 6
FWCI
8.40
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Research Information System (University of Udine) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
National Eye Institute (R01EY022954, R01EY018000)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Ocular Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
Pax6, aniridia, ultraconserved elements, cis-regulatory elements, enhancers, autoregulatory loop, haploinsufficiency, de novo mutations, eye development, congenital eye malformation
MeSH terms
PAX6 Transcription Factor, Animals, Base Sequence, Enhancer Elements, Genetic, Eye, Eye Proteins, Homeostasis, Humans, Molecular Sequence Data, Mutation, Phenotype, Repressor Proteins, Zebrafish, Aniridia, Sequence Alignment, Homeodomain Proteins, Gene Expression Regulation, Developmental, Gene Order, Mice, Paired Box Transcription Factors

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