NDLI: MyoD expression in the forming somites is an early response to mesoderm induction in Xenopus embryos.

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MyoD expression in the forming somites is an early response to mesoderm induction in Xenopus embryos.

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MyoD expression in the forming somites is an early response to mesoderm induction in Xenopus embryos.

Content Provider	PubMed Central
Author	Hopwood, N. D. Pluck, A. Gurdon, J. B.
Abstract	We describe the cloning, cDNA sequence and embryonic expression of a Xenopus homologue of MyoD, a mouse gene encoding a DNA-binding protein that can activate muscle gene expression in cultured cells. The predicted Xenopus MyoD protein sequence is remarkably similar to mouse MyoD. Zygotic expression of MyoD begins in early gastrulae, but there is a low level of unlocalized maternal message. Northern blot analysis of dissected embryos and in situ hybridization show that MyoD RNA is restricted to the gastrula mesoderm and to the somites of neurulae and tailbud embryos. The time and place of MyoD expression are consistent with a role for MyoD in the activation of other muscle genes in the somites of the frog embryo. However, MyoD is skeletal muscle-specific and is not expressed even in the early embryonic heart, which co-expresses cardiac and skeletal actin isoforms. Striated muscle genes can therefore be activated in some embryonic tissues in the absence of MyoD. The concentration of MyoD in the somites falls once they have formed, suggesting that MyoD may act there transiently to establish muscle gene expression. MyoD transcription is activated following mesoderm induction, and is the earliest muscle-specific response to mesoderm-inducing factors so far described.
Starting Page	3409
File Format	PDF
ISSN	14602075
e-ISSN	14602075
Journal	The EMBO Journal
Issue Number	11
Volume Number	8
Language	English
Publisher Date	1989-11-01
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience Immunology and Microbiology Medicine Molecular Biology

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