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Ornithorhynchus ana...
Ornithorhynchus anatinus (Platypus) Links the Evolution of Immunoglobulin Genes in Eutherian Mammals and Nonmammalian Tetrapods
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Zhao, Yaofeng (author)
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Cui, Huiting (author)
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Whittington, Camilla M. (author)
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Wei, Zhiguo (author)
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Zhang, Xiaofeng (author)
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Zhang, Ziding (author)
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Yu, Li (author)
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Ren, Liming (author)
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Hu, Xiaoxiang (author)
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Zhang, Yaping (author)
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- Hellman, Lars (author)
- Uppsala universitet,Institutionen för cell- och molekylärbiologi
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Belov, Katherine (author)
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Li, Ning (author)
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- Hammarström, Lennart (author)
- Karolinska Institutet
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(creator_code:org_t)
- The American Association of Immunologists, 2009
- 2009
- English.
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In: Journal of Immunology. - : The American Association of Immunologists. - 0022-1767 .- 1550-6606. ; 183:5, s. 3285-3293
- Related links:
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http://www.jimmunol....
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https://urn.kb.se/re...
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https://doi.org/10.4...
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Abstract
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- The evolutionary origins of mammalian immunoglobulin H chain isotypes (IgM, IgD, IgG, IgE, and IgA) are still incompletely understood as these isotypes differ considerably in structure and number from their counterparts in nonmammalian tetrapods. We report in this study that the platypus (Ornithorhynchus anatinus) Ig H chain constant region gene locus contains eight Ig encoding genes, which are arranged in an mu-delta-o-gamma 2-gamma 1-alpha 1-epsilon-alpha 2 order, spanning a total of similar to 200 kb DNA, encoding six distinct isotypes. The o (o for Ornithorhynchus) gene encodes a novel Ig H chain isotype that consists of four constant region domains and a hinge, and is structurally different from any of the five known mammalian Ig classes. This gene is phylogenetically related to nu (epsilon) and gamma, and thus appears to be a structural intermediate between these two genes. The platypus delta gene encodes ten heavy chain constant region domains, lacks a hinge region and is similar to IgD in amphibians and fish, but strikingly different from that in eutherian mammals. The platypus Ig H chain isotype repertoire thus shows a unique combination of genes that share similarity both to those of nonmammallian tetrapods and eutherian animals and demonstrates how phylogenetically informative species can be used to reconstruct the evolutionary history of functionally important genes.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- Biology
- Biologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zhao, Yaofeng
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Cui, Huiting
-
Whittington, Cam ...
-
Wei, Zhiguo
-
Zhang, Xiaofeng
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Zhang, Ziding
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show more...
-
Yu, Li
-
Ren, Liming
-
Hu, Xiaoxiang
-
Zhang, Yaping
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Hellman, Lars
-
Belov, Katherine
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Li, Ning
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Hammarström, Len ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
- Articles in the publication
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Journal of Immun ...
- By the university
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Uppsala University
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Karolinska Institutet