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Displaying TUB Family from Rice


The small genome of Arabidopsis contains at least nine expressed beta-tubulin (TUB) genes, in contrast to the large genomes of vertebrate animals, which contain a maximum of seven expressed beta-tubulin genes. In this study, we report the structures of seven new TUB genes (TUB2, TUB3, TUB5, TUB6, TUB7, TUB8, and TUB9) of Arabidopsis. The sequences of TUB1 and TUB4 had been reported previously. Sequence similarities and unique structural features suggest that the nine TUB genes evolved by way of three branches in the plant beta-tubulin gene evolutionary tree. Two genes (TUB2 and TUB3) encode the same beta-tubulin isoform; thus, the nine genes predict eight different beta-tubulins. In contrast to the alpha-tubulin (TUA) genes with their divergent intron patterns, all nine TUB genes contain 2 introns at conserved positions. Noncoding 3' gene-specific hybridization probes have been constructed for all nine TUB genes and used in RNA gel blot analyses to demonstrate that all nine genes are transcribed. Two-dimensional protein immunoblot analyses have resolved at least seven different beta-tubulin isoforms in Arabidopsis, indicating that most, if not all, of the TUB transcripts are translated.

Protein Name
accepted / suggested
Gene Locus Synonym/
Gene Name
Clone in TFome Genome Browser
LOC_Os03g22655 View in Browser
OsTUB1 LOC_Os01g48370 View in Browser
OsTUB2 LOC_Os01g55430 View in Browser
OsTUB3 LOC_Os01g64700 View in Browser
OsTUB4 LOC_Os02g08310 View in Browser
OsTUB5 LOC_Os02g47640 View in Browser
OsTUB6 LOC_Os03g22800 View in Browser
OsTUB7 LOC_Os04g59130 View in Browser
OsTUB8 LOC_Os05g36190 View in Browser
OsTUB9 LOC_Os05g43850 View in Browser
OsTUB10 LOC_Os05g48670 View in Browser
OsTUB11 LOC_Os07g47110 View in Browser
OsTUB12 LOC_Os08g01290 View in Browser
OsTUB13 LOC_Os11g06420 View in Browser
OsTUB14 LOC_Os12g06630 View in Browser