Sequence of chicken c beta 7 tubulin. Analysis of a complete set of vertebrate beta-tubulin isotypes.
In chicken, beta-tubulin is encoded by a family of seven genes. We have now isolated and sequenced overlapping cDNA clones corresponding to gene c beta 7 (previously designated c beta 4'), the only chicken beta-tubulin not previously characterized. The inferred amino acid sequence of c beta 7 tubulin is identical with the class I beta-tubulin isotype found in human, mouse and rat. Moreover, c beta 7 is highly expressed in almost all tissue and cell types in chicken, a pattern similar to those of the genes for class I beta-tubulin isotypes in other vertebrates. Comparison of the complete family of chicken beta-tubulin gene sequences reveals that the heterogeneity of beta-tubulin polypeptides encoded in a higher eukaryote is confined to six distinct beta-tubulin isotypes. Five of these are members of evolutionarily conserved isotypic classes (I to V), whereas the sixth represents a divergent erythroid-specific tubulin whose sequence has not been conserved.
Monteiro
M J
MJ
Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
Cleveland
D W
DW
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002645:Chickens; D004247:DNA; D005796:Genes; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic; D012333:RNA, Messenger; D051381:Rats; D014158:Transcription, Genetic; D014404:Tubulin / Q000235:genetics*
D012333:RNA, Messenger; D014404:Tubulin; D004247:DNA