Abstract
We previously reported the cloning of a rat S1 cDNA whose deduced amino acid sequence shares high similarity (92%) with that of mammalian elongation factor-1 alpha (EF-1α), a protein involved in the binding of aminoacyl-tRNA to the ribosome during peptide synthesis. We report here the isolation of a full-length cDNA from a mouse brain library and a partial-length cDNA from a human hippocampus library which share extensive sequence similarity to rat S1 cDNA. We show that, as with mammalian EF-1αs, the predicted primary amino acid sequences of rat, mouse, and human S1 are almost identical, except for one conservative substitution. These results indicate that mouse and man contain a second member of the EF-1α gene family, the S1 gene. They also suggest that our result obtained in rat may be extrapolated to mouse and man.
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