Interacting transcription factors from the three-amino acid loop extension superclass regulate tuber formation

From: Plant Physiology | Date: July 1, 2003| Author: | Copyright information

Using the yeast (Saccharomyces cerevisiae) two-hybrid system and a potato (Solarium tuberosum) KNOX protein, designated POTH1, as bait, we have identified seven distinct interacting proteins from a stolon library of potato. All seven cDNAs are members of the BEL1-like family of transcription factors. Among these proteins, there are at least four regions of high sequence conservation including the homeodomain, the proline-tyrosine-proline three-amino acid loop extension, the SKY box, and a 120-amino acid region upstream from the homeodomain. Through deletion analysis, we identified a ...

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