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Author

Cho, Moo Je
Ulsan National Institute of Science and Technology
Research Interests
  • Calcium Signaling

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STF1 is a novel TGACG-binding factor with a zinc-finger motif and a bZIP domain which heterodimerizes with GBF proteins

Cited 19 times inthomson ciCited 17 times inthomson ci
Title
STF1 is a novel TGACG-binding factor with a zinc-finger motif and a bZIP domain which heterodimerizes with GBF proteins
Author
Cheong, YHYoo, CMPark, JMRyu, GRGoekjian, VHNagao, RTKey, JLCho, Moo JeHong, JC
Keywords
LEUCINE ZIPPER PROTEINS; NUCLEAR FACTOR CREB; DNA-BINDING; G-BOX; TRANSCRIPTION FACTOR; SYNTHASE PROMOTER; REGULATORY GENE; OCS-ELEMENT; PLANT GENES; COILED COIL
Issue Date
199807
Publisher
WILEY-BLACKWELL
Citation
PLANT JOURNAL, v.15, no.2, pp.199 - 209
Abstract
Two separate nuclear binding activities (B1 and B2) in the soybean apical hypocotyl have been identified that interact with a palindromic C-box sequence (TGACGTCA) and which are developmentally regulated in an inverse manner. The bZIP factors responsible for these two binding activities, B1 and B2, were isolated from a cDNA library and designated STGA1 and STFs (STF1 and STF2), respectively. Sequence analysis shows that the STFs contain both a zinc-finger domain and a bZIP domain. The two zinc finger sequences of Cys4-Cys4 are most related to the RING zinc-finger motif carrying a Cys3-His-Cys4. In addition the bZIP domain of STFs is highly homologous to the HY5 protein of Arabidopsis. DNA binding studies revealed that STF1 binding to the TGACGT sequence requires distinct flanking sequences. Furthermore, STF1 binds to the Hex sequence as a heterodimer with G-box binding factors (GBFs), a feature not observed with STGA1. Since STF1 expression is most prevalent in apical and elongating hypocotyls, it is proposed that STF1 may be a transcription factor involved in the process of hypocotyl elongation.
URI
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DOI
http://dx.doi.org/10.1046/j.1365-313X.1998.00197.x
ISSN
0960-7412
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