The two Xenopus Gbx2 genes exhibit similar, but not identical expression patterns and can affect head formation

Ella Tour; Graciela Pillemer; Yosef Gruenbaum; Abraham Fainsod

doi:10.1016/S0014-5793(01)02963-5

The two Xenopus Gbx2 genes exhibit similar, but not identical expression patterns and can affect head formation

Ella Tour^*, Graciela Pillemer, Yosef Gruenbaum, Abraham Fainsod

^*Corresponding author for this work

Department of Developmental Biology and Cancer Research

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Gbx2 homeobox genes are important for formation and function of the midbrain/hindbrain boundary, namely the isthmic organizer. Two Gbx2 genes were identified in Xenopus laevis, differing in 13 amino acids, including a change in the homeodomain. Xgbx2a is activated earlier during gastrulation and reaches higher levels of expression while Xgbx2b is expressed later, at lower levels and has an additional domain in the ventral blood islands. Their overexpression results in microcephalic embryos with shortened axes and defects in brain and notochord formation. Both genes encode functionally homologous proteins, which differ primarily in their temporal and spatial expression patterns.

Original language	American English
Pages (from-to)	205-209
Number of pages	5
Journal	FEBS Letters
Volume	507
Issue number	2
DOIs	https://doi.org/10.1016/S0014-5793(01)02963-5
State	Published - 26 Oct 2001

Bibliographical note

Funding Information:
We thank Dr. Dale Frank and Dr. Oded Khaner for discussions during the course of the work. This work was supported in part by grants from the March of Dimes Birth Defects Foundation, Volkswagen Stiftung and The Israel Academy of Sciences to A.F. and by the Sheinbrun Foundation to Y.G.

Keywords

Anterior-posterior axis
Embryonic development
Homeobox
Isthmic organizer
Midbrain-hindbrain boundary

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abstract = "Gbx2 homeobox genes are important for formation and function of the midbrain/hindbrain boundary, namely the isthmic organizer. Two Gbx2 genes were identified in Xenopus laevis, differing in 13 amino acids, including a change in the homeodomain. Xgbx2a is activated earlier during gastrulation and reaches higher levels of expression while Xgbx2b is expressed later, at lower levels and has an additional domain in the ventral blood islands. Their overexpression results in microcephalic embryos with shortened axes and defects in brain and notochord formation. Both genes encode functionally homologous proteins, which differ primarily in their temporal and spatial expression patterns.",

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AU - Gruenbaum, Yosef

AU - Fainsod, Abraham

N1 - Funding Information: We thank Dr. Dale Frank and Dr. Oded Khaner for discussions during the course of the work. This work was supported in part by grants from the March of Dimes Birth Defects Foundation, Volkswagen Stiftung and The Israel Academy of Sciences to A.F. and by the Sheinbrun Foundation to Y.G.

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AB - Gbx2 homeobox genes are important for formation and function of the midbrain/hindbrain boundary, namely the isthmic organizer. Two Gbx2 genes were identified in Xenopus laevis, differing in 13 amino acids, including a change in the homeodomain. Xgbx2a is activated earlier during gastrulation and reaches higher levels of expression while Xgbx2b is expressed later, at lower levels and has an additional domain in the ventral blood islands. Their overexpression results in microcephalic embryos with shortened axes and defects in brain and notochord formation. Both genes encode functionally homologous proteins, which differ primarily in their temporal and spatial expression patterns.

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The two Xenopus Gbx2 genes exhibit similar, but not identical expression patterns and can affect head formation

Abstract

Bibliographical note

Keywords

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