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相关概念视频

Peptide Bonds02:43

Peptide Bonds

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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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Protein and Protein Structure02:15

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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
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In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
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StrEAMM-Thioether:对Thioether-Linked循环的高效结构预测

Minh Ngoc Ho1, Jiayuan Miao1, Yi Shan2

  • 1Department of Chemistry, School of Arts and Sciences, Tufts University, Medford, Massachusetts 02155, United States.

The journal of physical chemistry. B
|February 6, 2026
PubMed
概括
此摘要是机器生成的。

我们开发了一种机器学习方法来预测循环结构,改善药物发现. 这种计算工具准确地模拟了与结合的循环,有助于设计新疗法.

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科学领域:

  • 计算化学是一种计算化学.
  • 生物物理学的生物物理.
  • 药品化学 药品化学 是一个

背景情况:

  • 循环是一种有前途的治疗药物,向蛋白质-蛋白质相互作用和细胞膜.
  • 预测循环结构组合对于合理的药物设计至关重要,但在实验上具有挑战性.
  • 像分子动力学 (MD) 这样的现有计算方法是计算密集的.

研究的目的:

  • 扩展StrEAMM (通过分子动力学和机器学习实现的结构合集) 平台,用于以太结合的循环.
  • 开发一种快速而准确的计算方法,用于预测乙烯结合循环的结构组合.
  • 促进设计和发现与mRNA显示查兼容的循环疗法.

主要方法:

  • 在StrEAMM框架内开发和训练图形神经网络模型.
  • 应用这些模型来预测乙烯结合的循环的结构组合.
  • 使用溶液核磁共振 (NMR) 实验合成和表征预测的循环.

主要成果:

  • StrEAMM-thioether模型准确地预测了与thioether结合的循环的结构组合.
  • 根据模型预测,确定了四种与乙烯结合的循环五,结构良好.
  • 实验性NMR特征表现出与计算预测的结构普遍一致.

结论:

  • StrEAMM-thioether模型提供了一种快速可靠的方法来预测循环结构组合.
  • 这种方法简化了循环疗法的设计和发现.
  • 这些模型可以与mRNA显示平台集成,以实现高效的药物发现.