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Two mammalian helix-loop-helix factors structurally related to Drosophila hairy and Enhancer of split.

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Sasai, Y, Kageyama, R, Tagawa, Y, Shigemoto, R, Nakanishi, S·1992·Genes & Development

Abstract

We report the molecular characterization of two novel rat helix-loop-helix (HLH) proteins, designated HES-1 and HES-3, that show structural homology to the Drosophila hairy and Enhancer of split [E(spl)] proteins, both of which are required for normal neurogenesis. HES-1 mRNA, expressed in various tissues of both embryos and adults, is present at a high level in the epithelial cells, including the embryonal neuroepithelial cells, as well as in the mesoderm-derived tissues such as the embryonal muscle. In contrast, HES-3 mRNA is produced exclusively in cerebellar Purkinje cells. HES-1 represses transcription by binding to the N box, which is a recognition sequence of E(spl) proteins. Interestingly, neither HES-1 nor HES-3 alone interacts efficiently with the E box, but each protein decreases the transcription induced by E-box-binding HLH activators such as E47. Furthermore, HES-1 also inhibits the functions of MyoD and MASH1 and effectively diminishes the myogenic conversion of C3H10T1/2 cells induced by MyoD. These results suggest that HES-1 may play an important role in mammalian development by negatively acting on the two different sequences while HES-3 acts as a repressor in a specific type of neurons.

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Metadata

Authors
Sasai, Y., Kageyama, R., Tagawa, Y., Shigemoto, R., & Nakanishi, S.
Venue
Genes & Development
Published
1992-12-01
Volume
6
Issue
12b
Pages
2620-2634
ISSN
0890-9369 (ISSN-L)
OpenAlex
W2025804504
Cited by
671
References
3
Type
posted content
Language
en
Open access
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CoChat. (2026). Citation check: Two mammalian helix-loop-helix factors structurally related to Drosophila hairy and Enhancer of split. https://app.cochat.ai/papers/10.1101/gad.6.12b.2620
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Sasai, Y., Kageyama, R., Tagawa, Y., Shigemoto, R., & Nakanishi, S. (1992). Two mammalian helix-loop-helix factors structurally related to Drosophila hairy and Enhancer of split. Genes & Development. https://doi.org/10.1101/gad.6.12b.2620

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