Cited by 265Genetic Syndromes and ImprintingChromosomal and Genetic VariationsDevelopmental Biology and Gene Regulation

M6P/IGF2R Imprinting Evolution in Mammals

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Killian, J.Keith, Byrd, James C, Jirtle, James V, Munday, Barry L, Stoskopf, Michael K, MacDonald, Richard G, Jirtle, Randy L·2000·Molecular Cell

Abstract

Imprinted gene identification in animals has been limited to eutherian mammals, suggesting a significant role for intrauterine fetal development in the evolution of imprinting. We report herein that M6P/IGF2R is not imprinted in monotremes and does not encode for a receptor that binds IGF2. In contrast, M6P/IGF2R is imprinted in a didelphid marsupial, the opossum, but it strikingly lacks the differentially methylated CpG island in intron 2 postulated to be involved in imprint control. Thus, invasive placentation and gestational fetal growth are not required for imprinted genes to evolve. Unless there was convergent evolution of M6P/ IGF2R imprinting and receptor IGF2 binding in marsupials and eutherians, our results also demonstrate that these two functions evolved in a mammalian clade exclusive of monotremes.

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Crossref · 10.1016/s1097-2765(00)80249-x

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  • In vertebrates, imprinting seems to have evolved recently and has only been confirmed in marsupials and eutherian mammals.

    “In the vertebrates, imprinting seems to have evolved recently and has only been confirmed in marsupials and eutherian mammals 61,62”

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Authors
Killian, J. K., Byrd, J. C., Jirtle, J. V., Munday, B. L., Stoskopf, M. K., MacDonald, R. G., & Jirtle, R. L.
Affiliations
  • Duke Medical Center (US)
  • University of Nebraska Medical Center (US)
  • University of Tasmania (AU)
  • North Carolina State University (US)
Corresponding author
Jirtle, Randy L
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2000-04
Volume
5
Issue
4
Pages
707-716
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2115497164
Cited by
265
References
62
Citations by year
2026: 3 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 7 · 2021: 1 · 2020: 3 · 2019: 3 · 2018: 6 · 2017: 3 · 2016: 6 · 2015: 5 · 2014: 5 · 2013: 9 · 2012: 15
FWCI
11.90
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • National Cancer Institute (R01CA025951, CA25951)
  • National Institute of Environmental Health Sciences (ES08823, R01ES008823)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
genomic imprinting, IGF-II receptor, marsupials, Didelphidae, Didelphis virginiana, monotremes, differentially methylated regions, CpG islands, placental evolution, fetal growth, convergent evolution, placental mammals
MeSH terms
Amino Acid Sequence, Animals, Carrier Proteins, Tachyglossidae, Biological Evolution, Insulin-Like Growth Factor II, Introns, Male, Mammals, Molecular Sequence Data, Opossums, Platypus, Sequence Alignment, Sequence Homology, Amino Acid, Sequence Analysis, DNA, Receptor, IGF Type 2, DNA, Complementary, Genomic Imprinting

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