HFR1 cDNA ORF clone, Arabidopsis thaliana(thale cress)

Sequence and analysis of chromosome 1 of the plant Arabidopsis thaliana.
Theologis A, Ecker JR, Palm CJ, Federspiel NA, Kaul S, White O, Alonso J, Altafi H, Araujo R, Bowman CL, Brooks SY, Buehler E, Chan A, Chao Q, Chen H, Cheuk RF, Chin CW, Chung MK, Conn L, Conway AB, Conway AR, Creasy TH, Dewar K, Dunn P, Etgu P, Feldblyum TV, Feng J, Fong B, Fujii CY, Gill JE, Goldsmith AD, Haas B, Hansen NF, Hughes B, Huizar L, Hunter JL, Jenkins J, Johnson-Hopson C, Khan S, Khaykin E, Kim CJ, Koo HL, Kremenetskaia I, Kurtz DB, Kwan A, Lam B, Langin-Hooper S, Lee A, Lee JM, Lenz CA, Li JH, Li Y, Lin X, Liu SX, Liu ZA, Luros JS, Maiti R, Marziali A, Militscher J, Miranda M, Nguyen M, Nierman WC, Osborne BI, Pai G, Peterson J, Pham PK, Rizzo M, Rooney T, Rowley D, Sakano H, Salzberg SL, Schwartz JR, Shinn P, Southwick AM, Sun H, Tallon LJ, Tambunga G, Toriumi MJ, Town CD, Utterback T, Van Aken S, Vaysberg M, Vysotskaia VS, Walker M, Wu D, Yu G, Fraser CM, Venter JC, Davis RW
Nature408(6814)816-20(2000 Dec)

light inactivates DET1, elevating HFR1 to sequester PIF1's suppression on seed germination
Title: Arabidopsis DET1 degrades HFR1 but stabilizes PIF1 to precisely regulate seed germination.

HFR1 prevents PIF1 from binding to its target genes and antagonistically regulates PIF1-mediated gene expression. HFR1 and PIF1 are the major transcription regulators responsible for light-directed Transcriptome changes in seed germination.
Title: HFR1 sequesters PIF1 to govern the transcriptional network underlying light-initiated seed germination in Arabidopsis.

HY5 transmits phyA signals through an FHY1/FHL-independent pathway but it may also modulate FHY1/FHL signal through its interaction with HFR1 and LAF1.
Title: Three transcription factors, HFR1, LAF1 and HY5, regulate largely independent signaling pathways downstream of phytochrome A.

The HLH and the adjacent C-terminal domain are required for biological activity of HFR1.
Title: The shade avoidance syndrome in Arabidopsis: a fundamental role for atypical basic helix-loop-helix proteins as transcriptional cofactors.

OWL1 interacts with the basic helix-loop-helix HFR1 (LONG HYPOCOTYL IN FAR-RED) transcription factor. Both proteins are involved in the agravitropic response under far-red light.
Title: OWL1: an Arabidopsis J-domain protein involved in perception of very low light fluences.