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Structural Protein Function01:56

Structural Protein Function

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tRNA Activation02:26

tRNA Activation

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Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
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Protein Complex Assembly02:41

Protein Complex Assembly

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Nucleic Acid Structure01:25

Nucleic Acid Structure

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
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Mechanical Protein Function01:58

Mechanical Protein Function

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Conjugated Proteins02:50

Conjugated Proteins

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Synthesis and Structure Determination of &#181;-Conotoxin PIIIA Isomers with Different Disulfide Connectivities
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将结构辅助的功能分配给转录基因共 Am93131 的转录基因共.

Shamasoddin Shekh1, Shweta Dhannura1, Pooja Dhurjad2

  • 1Department of Chemistry, School of Chemical Sciences, Central University of Karnataka, Kalaburagi, 585367, Karnataka, India.

Toxicon : official journal of the International Society on Toxinology
|September 5, 2024
PubMed
概括
此摘要是机器生成的。

目前正在使用先进的基因测序和计算建模研究海洋牛毒. 这项研究揭示了一个特定的3D结构,Am931,这表明它在调节毒素折叠和功能的作用.

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科学领域:

  • 海洋生物学 海洋生物学
  • 生物化学 生物化学
  • 结构生物学是结构生物学.

背景情况:

  • 下一代测序提供了广泛的海洋牛毒数据.
  • 计算平台正在推进从初级序列的3D多结构预测.

研究的目的:

  • 整合转录和计算结构数据用于结构辅助的功能赋值的孔子.
  • 为了证明这种方法,使用C. amadis的转录组Am931.1.

主要方法:

  • 毒液管转录组的基因测序.
  • 使用密度函数理论 (DFT) 进行3D结构计算.
  • 使用二维NMR光谱的结构验证.
  • 合成Am931在毒素折叠的功能测定.

主要成果:

  • 计算并验证了Am931的3D结构.
  • Am931的结构与硫素活性部位保持一致,具有催化二硫化物构成.
  • Am931选择性调节N端Cys3醇,表明潜在的二硫化物异构酶活性.
  • 合成Am931在α-conotoxin ImI的氧化折叠中表现出催化活性,改善了原生折叠产量.

结论:

  • Am931可能作为二硫化物异构酶起作用,调节毒素氧化折叠.
  • 整合新技术加速了功能性共毒素的发现.
  • 这种结构-功能方法促进了对海洋毒素的理解.