The arabidopsis phytochrome interacting factor pif7

2020-02-20 19:41 The Arabidopsis factor PIF7, together with PIF3 and PIF4, regulates responses to prolonged red light by modulating phyB levels.

Feb 01, 2008  We show that a previously uncharacterized Arabidopsis thaliana basic helixloophelix (bHLH) phytochrome interacting factor (PIF), designated PIF7, interacts specifically with the farred lightabsorbing Pfr form of phyB through a conserved domain called the active phyB binding motif. the arabidopsis phytochrome interacting factor pif7

Transcription factor acting negatively in the phytochrome B signaling pathway under prolonged red light. Regulates PHYB abundance at the posttranscriptional level, possibly via the ubiquitinproteasome pathway. May regulate the expression of a subset of genes by binding to the Gbox motif.

The Arabidopsis factor PIF7, together with PIF3 and PIF4, regulates responses to prolonged red light by modulating phyB levels. Plant Cell. 2008; 20: View in Article the arabidopsis phytochrome interacting factor pif7

Phytochromes do this in part by inhibiting the function of a group of basic helixloophelix transcription factors called factors (PIFs). Arabidopsis has eight PIFs that function sometimes redundantly and sometimes distinctively depending on their expression patterns and protein stability, as well as on variations in the promoters they target in vivo. PIFlike proteins exist in other seed plants Transactivation experiments using Arabidopsis protoplasts indicated that PIF7 functions as a transcriptional repressor for DREB1C expression and that its activity is regulated by PIF7interacting factors TIMING OF CAB EXPRESSION1 and Phytochrome B, which are components of the circadian oscillator and the red light photoreceptor, respectively. thaliana). MRG2 binds FACTOR7 (PIF7) and regulates the expression of several common downstream target genes, including YUCCA8 and IAA19 involved in the auxin biosynthesis or response pathway and PRE1 involved in brassinosteroid regulation of cell elongation. In response to shade, PIF7 and MRG2 are enriched at the promoter and the arabidopsis phytochrome interacting factor pif7 The Arabidopsis Factor PIF7, Together with PIF3 and PIF4, Regulates Responses to Prolonged Red Light by Modulating phyB Levels W Pablo Leivar, a, b, 1 Elena Monte, a, b, 1, 2 Bassem AlSady, a, b Christine Carle, a, b Alyssa Storer, a, b Jose M. Alonso, c, 3 Joseph R. Ecker, c and Peter H. Quaila, b, 4 The Arabidopsis Factor PIF7, Together with PIF3 and PIF4, Regulates Responses to Prolonged Red Light by Modulating phyB Levels Pablo Leivar, a, b, 1 Elena Monte, a, b, 1, 2 Bassem AlSady, a, b Christine Carle, a, b Alyssa Storer, a, b Jose M. Alonso, c, 3 Joseph R. Ecker, c and Peter H. Quail a, b, 4 Dec 01, 2009 Transactivation experiments using Arabidopsis protoplasts indicated that PIF7 functions as a transcriptional repressor for DREB1C expression and that its activity is regulated by PIF7interacting factors TIMING OF CAB EXPRESSION1 and Phytochrome B, which are components of the circadian oscillator and the red light photoreceptor, respectively. We show that a previously uncharacterized Arabidopsis thaliana basic helixloophelix (bHLH) phytochrome interacting factor (PIF), designated PIF7, interacts specifically with the farred light

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