Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Reexamination Certificate
2007-01-16
2007-01-16
Kallis, Russell P. (Department: 1638)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
C536S023100, C536S023200
Reexamination Certificate
active
10641100
ABSTRACT:
This invention is about the functionally hyperactive light signal related molecule, HFR1-ΔN105, of which the nucleic acids that encode N-terminal 105 amino acid residues were deleted. HFR1 as a bHLH transcription factor functions in a subset of phytochrome A signaling cascade and it was reported to be regulated negatively by COP1. Experiments with a HFR1-ΔN105 overexpressing plant revealed that the deletion of N-terminal amino acids makes the HFR1 more active in photomorphogenic development such as germination and de-etiolation. In addition, the transgenic plants showed hypersensitive photo-responses in the inhibition of hypocotyl elongation, dependently on another positive element of light signaling, a bZIP protein, HY5. The end-of-day far-red light response and petiole elongation were suppressed in the HFR1-ΔN105 overexpressing plants. These results suggest that N-terminal region of HFR1 negatively regulate HFR1 function and that HFR1-ΔN105 is hyperactive.
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Soh Moon-Soo
Song Pill-Soon
Yang Ki-Young
Kenyon & Kenyon LLP
Korea Kumho Petrochemical Co. Ltd.
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