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相关概念视频

Biological Clocks and Seasonal Responses02:45

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The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
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Cell Signaling in Plants01:25

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Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
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Photoreceptors and Plant Responses to Light02:00

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Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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Channel Rhodopsins01:11

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
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The Antenna Complex01:42

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Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...
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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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In Vitro Reconstitution of Light-harvesting Complexes of Plants and Green Algae
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在植物密码染色体中剖析序列结构功能多样性.

Pratichi Sarkar1, Aparna Boral2, Devrani Mitra2

  • 1Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92 A.P.C. Road, Kolkata, WB 700009, India.

Plant science : an international journal of experimental plant biology
|January 2, 2025
PubMed
概括

植物的加密色素 (CRY1和CRY2) 调节了依赖光的功能. 这篇评论探讨了它们的序列结构层次如何驱动功能多样性,并将它们与其他加密染色体/光聚酶家族成员进行比较.

关键词:
摄影类的光学激光种植加密染色体的植物蛋白质与蛋白质的相互作用序列结构分析分析 序列结构分析信号传输 信号传输维修紫外线损伤的修复

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科学领域:

  • 植物分子生物学 植物分子生物学
  • 摄影生物学 摄影生物学
  • 进化生物学是进化的生物学.

背景情况:

  • 加密染色体是植物中的重要光受体,控制着各种依赖光的过程,如昼夜节律和应激反应.
  • 现有的审查通常集中在功能上,但序列,结构和功能多样性之间的联系仍未得到充分探索.

研究的目的:

  • 研究植物密码染色体 (CRY1和CRY2) 功能多样性背后的序列结构功能关系.
  • 将植物加密染色与加密染色/光聚酶家族 (CPF) 的其他成员进行比较.
  • 了解在CPF中的DNA修复等特定功能的进化基础.

主要方法:

  • 对植物加密染色体的序列和3D结构数据进行比较分析.
  • 使用多个序列对齐的遗传学概况.
  • 文献调查和文献分析.

主要成果:

  • 植物加密色子类型 (CRY1,CRY2) 的详细结构和功能区别.
  • 与其他CPF成员 (例如CRY-DASH,光酶) 的相似之处和差异的比较分析.
  • 识别进化模式,解释在CPF中的DNA修复等功能的分布.

结论:

  • 序列结构层次是植物加密染色体功能多样性的关键决定因素.
  • 对比和进化分析可以预测研究不足的植物加密染色体的功能.
  • 在序列-结构-功能层面上理解CPF对于破译植物光受体生物学至关重要.