ZFIN ID: ZDB-PUB-060825-14
RNA of AmVegT, the axolotl orthologue of the Xenopus meso-endodermal determinant, is not localized in the oocyte
Nath, K., and Elinson, R.P.
Date: 2007
Source: Gene expression patterns : GEP   7(1-2): 197-201 (Journal)
Registered Authors:
Keywords: Urodele, Anuran, Amphibian, Axolotl, Ambystoma, Mesoderm, Mesodermal determinant, VegT, Transcription factor, Localized RNA, T-box, Oocyte, Gastrula, Rohon-Beard neuron, Tailbud
MeSH Terms:
  • Ambystoma mexicanum/embryology*
  • Ambystoma mexicanum/genetics*
  • Ambystoma mexicanum/metabolism
  • Animals
  • Base Sequence
  • Cloning, Molecular
  • DNA Primers/genetics
  • Female
  • Gene Expression Regulation, Developmental
  • Oocytes/metabolism
  • RNA/genetics
  • RNA/metabolism
  • Species Specificity
  • T-Box Domain Proteins/genetics*
  • T-Box Domain Proteins/metabolism
  • Xenopus Proteins/genetics
  • Xenopus Proteins/metabolism
  • Xenopus laevis/embryology
  • Xenopus laevis/genetics
  • Xenopus laevis/metabolism
PubMed: 16920404 Full text @ Gene Expr. Patterns
The transcription factor, VegT, is the meso-endodermal determinant in Xenopus laevis, and the localization of VegT RNA to the vegetal cortex of the oocyte is an important starting point for embryonic patterning. We have cloned the VegT orthologue from the urodele amphibian, Ambystoma mexicanum, the Mexican axolotl. Axolotl VegT (AmVegT) is expressed zygotically in the presumptive mesoderm and Rohon-Beard neurons as in X. laevis, and its expression persists at the tip of the tail as with zebrafish and chicken orthologues. Unlike in X. laevis, AmVegT RNA is not localized in the oocyte. This result highlights a major difference in the molecular organization of oocytes of these two amphibian orders.