Cited by 183Hemoglobinopathies and Related DisordersGenomics and Chromatin DynamicsHemoglobin structure and function

Synergistic regulation of human beta-globin gene switching by locus control region elements HS3 and HS4.

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Bungert, J, Davé, U, Lim, K C, Lieuw, K H, Shavit, J A, Liu, Q, Engel, J D·1995·Genes & Development

Abstract

Proper tissue- and developmental stage-specific transcriptional control over the five genes of the human beta-globin locus is elicited in part by the locus control region (LCR), but the molecular mechanisms that dictate this determined pattern of gene expression during human development are still controversial. By use of homologous recombination in yeast to generate mutations in the LCR within a yeast artificial chromosome (YAC) bearing the entire human beta-globin gene locus, followed by injection of each of the mutated YACs into murine ova, we addressed the function of LCR hypersensitive site (HS) elements 3 and 4 in human beta-globin gene switching. The experiments revealed a number of unexpected properties that are directly attributable to LCR function. First, deletion of either HS3 or HS4 core elements from an otherwise intact YAC results in catastrophic disruption of globin gene expression at all erythroid developmental stages, despite the presence of all other HS elements in the YAC transgenes. If HS3 is used to replace HS4, gene expression is normal at all developmental stages. Conversely, insertion of the HS4 element in place of HS3 results in significant expression changes at every developmental stage, indicating that individual LCR HS elements play distinct roles in stage-specific beta-type globin gene activation. Although the HS4 duplication leads to alteration in the levels of epsilon- and gamma-globin mRNAs during embryonic erythropoiesis, total beta-type globin mRNA synthesis is balanced, thereby leading to the conclusion that all of the human beta-locus genes are competitively regulated. In summary, the human beta-globin HS elements appear to form a single, synergistic functional entity called the LCR, and HS3 and HS4 appear to be individually indispensable to the integrity of this macromolecular complex.

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  • The mammalian β-globin locus developmental β-globin genes are regulated by a powerful tissue-specific enhancer known as a locus control region (LCR).

    “These models were initially applied to the mammalian β-globin locus, in which the developmental β-globin genes are regulated by a powerful tissue-specific enhancer known as a locus control region (LCR) [254–257].”

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Research works printed but not linked: 3

  1. Driscoll, M.C., C.S. Dobkin, and B.P. Alter. 1989. -/SI3-Thalas- semia due to a de novo mutation deleting the 5' [3-globin gene activating-region hypersensitive sites. Proc. Natl. Acad. Sci. 86: 7470-7474.
  2. G. Stamatoyannopoulos, A.W. Nienhuis, P. Majerus, and H. Varmus), pp. 107-155.
  3. W.B. Saunders, Philadelphia, PA.

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Authors
Bungert, J., Davé, U., Lim, K. C., Lieuw, K. H., Shavit, J. A., Liu, Q., & Engel, J. D.
Affiliations
Northwestern University (US)
Venue
Genes & Development
Published
1995-12-15
Volume
9
Issue
24
Pages
3083-3096
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2050579225
Cited by
183
References
63
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2021: 5 · 2019: 2 · 2018: 4 · 2017: 1 · 2015: 1 · 2013: 2 · 2012: 4
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Northwestern University
  • Harvard University
  • University of Minnesota
  • Deutsches Krebsforschungszentrum
  • Deutsche Forschungsgemeinschaft
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL 24415, R01HL024415)
Topics
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
locus control region, HS3, hypersensitive sites, erythroid development, stage-specific gene expression, embryonic erythropoiesis, epsilon-globin, gamma-globin, competitive regulation, globin gene expression, yeast artificial chromosomes
MeSH terms
Animals, Base Sequence, Globins, Humans, Mice, Transgenic, Molecular Sequence Data, Mutation, Oligodeoxyribonucleotides, RNA, Messenger, Transcriptional Activation, Polymerase Chain Reaction, Chromosomes, Artificial, Yeast, Gene Expression Regulation, Developmental, Mice

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