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Int J Dev Biol April 1, 1995; 39 (2): 309-15.
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115 kDa protein from Xenopus laevis embryos recognized by antibodies directed against the Xenopus homeoprotein XIHbox 1.

Flavin M , Saint-Jeannet JP , Duprat AM , Strauss F .

Using antibodies against homeoprotein XIHbox 1 from Xenopus laevis, we have detected a new embryonic protein with a much larger molecular weight, 115 kDa. Antibodies fractionated according to their affinity for 3 different domains of the XIHbox 1 protein were used to show that this new protein is related to the C-terminal region of XIHbox 1 protein, downstream from the homeodomain. By immunohistochemistry, the protein was shown to be localized in nuclei of embryonic cells. On SDS-polyacrylamide gels, the 115 kDa protein appears as a set of closely spaced bands whose pattern varies with the stage of development and with the parental origin of the embryos. The protein could be extracted from embryos in a multiprotein complex of approximately 600 kDa. In contrast, the 18 and 27 kDa proteins predicted from the sequence of cloned cDNA to be transcribed and translated from the XIHbox 1 gene could not be detected, suggesting that they are rare or unstable in embryos. These data suggest that the new protein is involved in the development of Xenopus embryos, with a function possibly related to that of the homeoprotein XIHbox 1.

PubMed ID: 7669543
Article link: Int J Dev Biol

Species referenced: Xenopus laevis
Genes referenced: cntn1 gal.2 hoxc6
Antibodies: Hoxc6 Ab1

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