ARF1, a transcription factor that binds to auxin response elements.
basic_science · Level V
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Abstract
The plant hormone auxin regulates plant physiology by modulating the interaction of transcription factors with auxin response elements (AuxREs) of the affected genes. A transcription factor, Auxin Response Factor 1 (ARF1), that binds to the sequence TGTCTC in AuxREs was cloned from Arabidopsis by using a yeast one-hybrid system. ARF1 has an amino-terminal DNA-binding domain related to the carboxyl terminus of the maize transactivator Viviparous-1. Sequence requirements for ARF1 binding in vitro are identical to those that confer auxin responsiveness in vivo. The carboxyl terminus of ARF1 contains two motifs found in the Aux/IAA class of proteins and appears to mediate protein-protein interactions.
Medical subject headings
- DNA, Plant
- DNA-Binding Proteins
- Indoleacetic Acids
- Promoter Regions, Genetic
- Repetitive Sequences, Nucleic Acid
- Transcription Factors