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Author Hobo,T., Kowyama,Y. and Hattori,T.
Title A bZIP factor, TRAB1, interacts with VP1 and mediates abscisic acid-induced transcription.
The transcription factor VP1 regulates maturation and dormancy in plant seeds by activating genes responsive to the stress hormone abscisic acid (ABA). Although activation involves ABA-responsive elements (ABREs), VP1 itself does not specifically bind ABREs. Instead, we have identified and cloned a basic region leucine zipper (bZIP) factor, TRAB1, that interacts with both VP1 and ABREs. Transcription from a chimeric promoter with GAL4-binding sites was ABA-inducible if cells expressed a GAL4 DNA-binding domain::TRAB1 fusion protein. Results indicate that TRAB1 is a true trans-acting factor involved in ABA-regulated transcription and reveal a molecular mechanism for the VP1-dependent, ABA-inducible transcription that controls maturation and dormancy in plant embryos.
Journal Proc. Natl. Acad. Sci. U.S.A.
Country Japan
Volume 96(26)
Pages 15348-15353
Year 1999
PubMed ID 10611387
PubMed Central ID -
DOI 10.1073/pnas.96.26.15348
Gene TRAB1 VP1
INSD AB023288
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -