Isolation of cDNA of an auxin-regulated gene encoding a G protein beta subunit-like protein from tobacco BY-2 cells.
AUTOR(ES)
Ishida, S
RESUMO
The addition of 2,4-dichlorophenoxyacetic acid to tobacco BY-2 cells that had been cultured in modified Linsmaier and Skoog medium deprived of auxin for 3 days induced cell division, whereas without 2,4-dichlorophenoxy-acetic acid application, no such induction of cell division was seen. When differential cDNA screening for auxin was done at 4 hr after the addition of 2,4-dichlorophenoxyacetic acid, the cDNA of an auxin-responsive gene designated arcA was isolated. The predicted gene product of arcA is a polypeptide with a M(r) of 35,825. arcA, thus, is a plant hormone-regulated gene that encodes a protein structurally related to the beta subunit of a guanine nucleotide-binding regulatory protein, which is composed of seven repetitive segments of Trp-Asp 40-aa repeats. The possibility that arcA gene products induce cell division is discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=47940Documentos Relacionados
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