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Engineering hydrogen bonding at tyrosine-201 in the orange carotenoid protein using halogenated analogues.
Photosynth Res
January 2025
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
The Orange Carotenoid Protein (OCP) is a unique water-soluble photoactive protein that plays a critical role in regulating the balance between light harvesting and photoprotective responses in cyanobacteria. The challenge in understanding OCP´s photoactivation mechanism stems from the heterogeneity of the initial configurations of its embedded ketocarotenoid, which in the dark-adapted state can form up to two hydrogen bonds to critical amino acids in the protein's C-terminal domain, and the extremely low quantum yield of primary photoproduct formation. While a series of experiments involving point mutations within these contacts helped us to identify these challenges, they did not resolve them.
View Article and Find Full Text PDFPrioritization of candidate genes regulating the dwarfness in rice by integration of whole-genome and transcriptome analyses.
Funct Integr Genomics
January 2025
Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Madurai, Tamil Nadu, 625104, India.
Dwarfism is a major trait for developing lodging-resistant rice cultivars. Gamma irradiation-induced mutagenesis has proven to be an effective method for generating dwarf rice mutants. In this research, we isolated a dwarf mutant from Anna R (4) in the M generation and subsequently stabilized the trait through successive selfing of progeny across the M-M generations.
View Article and Find Full Text PDFThree-dimensional genome architecture in intrahepatic cholangiocarcinoma.
Cell Oncol (Dordr)
January 2025
College of Life Science and Technology, Innovation Center of Molecular Diagnostics, Beijing University of Chemical Technology, Beijing, 100029, China.
Purpose: Intrahepatic cholangiocarcinoma (ICC) is a common primary hepatic tumors with a 5-year survival rate of less than 20%. Therefore, it is crucial to elucidate the molecular mechanisms of ICC. Recently, the advance of high-throughput chromosome conformation capture (Hi-C) technology help us look insight into the three-dimensional (3D) genome structure variation during tumorigenesis.
View Article and Find Full Text PDFCircadian Modulation of Behavioral Stress Responses in Zebrafish Is Age-Dependent.
J Exp Zool A Ecol Integr Physiol
January 2025
Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Emilia-Romagna, Italy.
In the wild, stressors occur with varying likelihood throughout the day, leading animals to evolve plastic stress responses that exhibit circadian rhythmicity. In mammals, studies have revealed that the circadian plasticity of stress response may differ with age. However, such developmental effects have been largely overlooked in other vertebrate groups.
View Article and Find Full Text PDFLiving in Biological Darkness II: Impact of Winter Habitual Daytime Light on Night-Time Sleep.
Eur J Neurosci
January 2025
Institute of Physiology, Sleep Research & Clinical Chronobiology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Timing and architecture of sleep are co-driven by circadian rhythms modulated by their major Zeitgeber light and darkness. In a natural environment, one is exposed to 3.000 lx (cloudy winter sky) to 100.
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