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Pax6-dependent, but β-catenin-independent, function of Bcl9 proteins in mouse lens development


Cantù, Claudio; Zimmerli, Dario; Hausmann, George; Valenta, Tomas; Moor, Andreas; Aguet, Michel; Basler, Konrad (2014). Pax6-dependent, but β-catenin-independent, function of Bcl9 proteins in mouse lens development. Genes and Development, 28(17):1879-1884.

Abstract

Bcl9 and Bcl9l (Bcl9/9l) encode Wnt signaling components that mediate the interaction between β-catenin and Pygopus (Pygo) via two evolutionarily conserved domains, HD1 and HD2, respectively. We generated mouse strains lacking these domains to probe the β-catenin-dependent and β-catenin-independent roles of Bcl9/9l and Pygo during mouse development. While lens development is critically dependent on the presence of the HD1 domain, it is not affected by the lack of the HD2 domain, indicating that Bcl9/9l act in this context in a β-catenin-independent manner. Furthermore, we uncover a new regulatory circuit in which Pax6, the master regulator of eye development, directly activates Bcl9/9l transcription.

Abstract

Bcl9 and Bcl9l (Bcl9/9l) encode Wnt signaling components that mediate the interaction between β-catenin and Pygopus (Pygo) via two evolutionarily conserved domains, HD1 and HD2, respectively. We generated mouse strains lacking these domains to probe the β-catenin-dependent and β-catenin-independent roles of Bcl9/9l and Pygo during mouse development. While lens development is critically dependent on the presence of the HD1 domain, it is not affected by the lack of the HD2 domain, indicating that Bcl9/9l act in this context in a β-catenin-independent manner. Furthermore, we uncover a new regulatory circuit in which Pax6, the master regulator of eye development, directly activates Bcl9/9l transcription.

Citations

3 citations in Web of Science®
2 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Uncontrolled Keywords:Bcl9; Pax6; Pygopus; Wnt; lens induction; mouse
Language:English
Date:1 September 2014
Deposited On:17 Nov 2014 15:30
Last Modified:05 Apr 2016 18:30
Publisher:Cold Spring Harbor Laboratory Press
ISSN:0890-9369
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1101/gad.246140.114
PubMed ID:25184676

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