Conserved Spätzle/Toll signaling in dorsoventral patterning of Xenopus embryos

Armstrong, NJ; Steinbeisser, H; Prothmann, C; DeLotto, R; Rupp, RAW

doi:10.1016/s0925-4773(98)00003-3

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Conserved Spätzle/Toll signaling in dorsoventral patterning of Xenopus embryos

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Steinbeisser, H
Department Cell Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Citation

Armstrong, N., Steinbeisser, H., Prothmann, C., DeLotto, R., & Rupp, R. (1998). Conserved Spätzle/Toll signaling in dorsoventral patterning of Xenopus embryos. Mechanisms of Development, 71(1-2), 99-105. doi:10.1016/s0925-4773(98)00003-3.

Cite as: https://hdl.handle.net/21.11116/0000-000D-B218-F

Abstract

The Spätzle/Toll signaling pathway controls ventral axis formation in Drosophila by generating a gradient of nuclear Dorsal protein. Dorsal controls the downstream regulators dpp and sog, whose patterning functions are conserved between insects and vertebrates. Although there is no experimental evidence that the upstream events are conserved as well, we set out to ask if a vertebrate embryo can respond to maternal components of the fly Dorsal pathway. Here we demonstrate a dorsalizing activity for the heterologous Easter, Spätzle and Toll proteins in UV-ventralized Xenopus embryos, which is inhibited by a co-injected dominant Cactus variant. We conclude that the Dorsal signaling pathway is a component of the conserved dorsoventral (d/v) patterning system in bilateria.