Cryptochrome resetting of the circadian clock is certainly one of the most interesting aspects of the activity of this family of photoreceptors in plants, with their role in epigenetic and cell cycle regulation still to be determined.

2005年6月5日 · There are at least two mechanisms by which cryptochromes may affect nuclear gene-expression changes in response to light. First, a cryptochrome molecule may interact with proteins associated with transcriptional machinery to affect transcription directly.

Humans and mice have two cryptochrome genes, CRY1 and CRY2, that are differentially expressed in the retina relative to the opsin-based visual photoreceptors. CRY1 is highly expressed with circadian periodicity in the mammalian …

Keywords: cryptochrome, magnetoreception, photobiology, photochemistry. 1. INTRODUCTION. Diverse species have evolved mechanisms to sense and adapt to seasonal changes in temperature, food availability, and day length. For many animals, a central aspect of this adaptation is seasonal migration.

The first cryptochrome gene was isolated from Arabidopsis thaliana, which regulate stem growth, flowering time, stomatal opening, circadian clock, and other light responses. Cryptochromes are also found in all major crops investigated, with additional functions discovered, such as seed germination, leaf senescence, and stress responses.

2003年9月5日 · The primary chromophore of cryptochrome is a flavin—this flavin can exist in three different redox states: FAD, FADH, and FADH2. The absorption properties and, therefore, any resulting action spectrum of these different redox states varies considerably (Lin et al., 1995) .

Cryptochromes are flavoprotein photoreceptors first identified in Arabidopsis thaliana, where they play key roles in growth and development. Subsequently identified in prokaryotes, archaea, and many eukaryotes, cryptochromes function in the animal circadian clock and are proposed as magnetoreceptors …

Cryptochromes (CRYs) function as blue light photoreceptors in diverse physiological processes in nearly all kingdoms of life. Over the past several decades, they have emerged as the most likely candidates for light-dependent magnetoreception in animals, however, a long history of conflicts between in vitro photochemistry and in vivo behavioral data complicate validation of CRYs as …

Phytochrome and cryptochrome are chromoproteins responsible for sensing the environmental light signal and initiating a series of reactions responsible for the subsequent developmental responses. Cryptochrome homologues have been identified in animal and human cells.

2005年10月11日 · The protein, cryptochrome, is most often mentioned by circadian biologists. In organisms from cyanobacteria to humans, circadian rhythms are responsible for controlling temporal relationships of cellular, physiological, and behavioral processes and synchronizing these processes with important environmental cues, such as light and temperature.