The cDNA coding for GT3-synthase has been cloned from a rat fetal brai
n cDNA library. The complete nucleotide sequence and the deduced amino
acid sequence of the rat GT3-synthase cDNA were highly homologous to
those of the mouse GT3-synthase. Quantitative RT-PCR showed that, as a
key enzyme for the synthesis of 'c'-series gangliosides, the expressi
on of GT3-synthase was developmentally regulated in embryonic rat brai
ns.