alexa Cloning and functional analysis of the novel gene GhDBP3 encoding a DRE-binding transcription factor from Gossypium hirsutum.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Computer Science & Systems Biology

Author(s): Huang B, Liu JY

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Abstract A novel cDNA encoding DRE-binding transcription factor, designated GhDBP3, was cloned from Gossypium hirsutum. This protein was classified into A-4 group of DREB subfamily based on multiple sequence alignment and phylogenetic characterization. Semiquantitative RT-PCR showed that GhDBP3 was expressed in the leaves, cotyledons, roots and stems of 2-week-old cotton seedlings under non-stress conditions and was greatly induced in the cotton cotyledons by drought, NaCl, low temperature and ABA treatment. EMSA revealed that GhDBP3 was able to bind to the DRE cis-element in vitro. Transient assay using the particle bombardment method showed that GhDBP3 was a transcriptional activator, capable of activating expression of a reporter gene driven by the LEA D113 promoter containing a DRE like sequence in tobacco cells. Our results indicate that GhDBP3 could be a new member of DRE-binding transcription factor family and may play an important role in response to ABA and environmental stresses. This article was published in Biochim Biophys Acta and referenced in Journal of Computer Science & Systems Biology

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