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相关概念视频

Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
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Deep Sea Microbial Ecology01:18

Deep Sea Microbial Ecology

The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
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Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
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微生物金属蛋白质组在很大程度上没有特征.

Aleksandar Cvetkovic1, Angeli Lal Menon, Michael P Thorgersen

  • 1Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, USA.

Nature
|July 20, 2010
PubMed
概括

这项研究引入了一种新的基于金属的方法,用于识别生物体使用的所有金属及其金属蛋白. 研究表明,金属蛋白质组比以前理解的更广泛和多样化,影响细胞生物学和毒性机制.

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科学领域:

  • 生物化学和分子生物学
  • 微生物学 微生物学
  • 蛋白质组学是指蛋白质组学.

背景情况:

  • 金属蛋白对于生物过程至关重要,它利用金属离子辅因子进行催化,电子转移和稳定.
  • 目前的方法难以预测生物体的金属蛋白质组,因为金属协调部位的多样性和认知不足.
  • 了解金属蛋白质组对于了解细胞生物学,微生物生长和毒性至关重要.

研究的目的:

  • 开发和验证一个强大的,基于金属的方法,用于全基因组识别同化金属和金属蛋白.
  • 描述Pyrococcus furiosus的细胞质金属蛋白和与其他微生物进行比较.
  • 揭示金属蛋白质组的全部范围和多样性.

主要方法:

  • 基于金属的识别和净化使用液态染色学.
  • 高通量双重质谱 (HT-MS/MS) 用于蛋白质的识别.
  • 诱导合等离子体质谱 (ICP-MS) 用于金属量化.

主要成果:

  • 一个基于金属的策略在三个微生物 (*Pyrococcus furiosus*, *Escherichia coli*, *Sulfolobus solfataricus*) 中发现了158种不可预测的金属蛋白.
  • 发现意想不到的金属,包括,,,,和,被同化.
  • 发现了含和的新型蛋白质,以及含和的蛋白质.

结论:

  • 金属蛋白质组比以前认可的更广泛和多样化.
  • 开发的基于金属的方法为全面的金属蛋白质组分析提供了一个强大的工具.
  • 这些发现为微生物生理学,金属同化和毒性机制提供了关键的见解.