细菌基基因组是光色的基因酶,使用色基因组的色基因组
S H Bhoo1, S J Davis, J Walker
1Cellular and Molecular Biology Program, Department of Horticulture, University of Wisconsin-Madison, 1575 Linden Drive, Madison, Wisconsin 53706, USA.
Nature
|December 14, 2001
概括
细菌染色体 (BphP) 是广泛存在的细菌光传感器,与植物染色体不同. 这些BPHP使用比利弗丁,并且与histidine激酶同源,这表明它们是古代光受体的祖先.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 摄影生物学 摄影生物学
背景情况:
- 植物染色体是植物中关键的红色/远红色光传感器.
- 以前人们认为植物染色体只存在于光合作用生物体中.
- 最近的发现确定了异构型细菌中类似植物色素的蛋白质.
研究的目的:
- 研究细菌中植物色样蛋白质的性质和流行情况.
- 了解这些细菌光受体的生物化学特性和进化起源.
主要方法:
- 同性学在细菌基因组中寻求识别类似植物染色体的蛋白质.
- 蛋白质-染色体相互作用的生物化学分析.
- 基因表达研究在体内检查BphP组件.
主要成果:
- 在多种细菌中鉴定出一种广泛的细菌基染色体 (BphPs) 家族.
- BphPs与双组分传感器胺激酶是同类的.
- BphPs使用比利弗丁作为染色体,与植物植物染色体不同,植物染色体使用植物染色素.
- 在某些情况下,特定的血氧酶用于胆固醇合成与BphP基因共定位.
- 在体内可以通过BphP阿波蛋白,血源和相关的血氧酶的共同表达来实现Holo-BphP组合.
结论:
- 细菌ophytochromes代表一个独特和古老的类型的光受体.
- 它们在细菌中的广泛分布和更简单的组装机制表明BphPs是植物植物染色体的进化前体.
- BphPs作为光调节的光色基因酶起作用,将光感应与细菌中的细胞信号连接起来.
相关概念视频
01:29The Photochemical Reaction Center
6.0K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
6.0K
01:11Channel Rhodopsins
3.5K
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.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
3.5K
01:25Cell Signaling in Plants
7.2K
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...
7.2K
01:22Photoreceptors and Visual Pathways
11.3K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
11.3K
01:30Anoxygenic Photosynthesis
1.9K
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
1.9K
01:28Anoxygenic Phototrophic Bacteria
1.3K
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
1.3K