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相关概念视频

Oligosaccharide Assembly01:24

Oligosaccharide Assembly

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Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
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Protein Glycosylation01:25

Protein Glycosylation

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Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
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The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Ligand Binding Sites02:40

Ligand Binding Sites

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
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Proteoglycans01:05

Proteoglycans

4.0K
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
4.0K
Glycocalyx and its Functions01:14

Glycocalyx and its Functions

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The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.
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相关实验视频

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Bioinformatics Resources for the Study of Glycan-Mediated Protein Interactions
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一个博尔兹曼模型预测了由莱克结合的甘氨酸结构.

Aria Yom1, Austin Chiang2,3,4, Nathan E Lewis5,2

  • 1Department of Physics, University of California, San Diego. CA 92093, USA.

bioRxiv : the preprint server for biology
|June 19, 2023
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概括
此摘要是机器生成的。

这项研究引入了一种使用莱克结合数据进行甘氨酸测序的新方法. 博尔兹曼模型准确地预测了甘氨酸结构,简化了甘氨酸蛋白研究和甘氨酸生物学应用.

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科学领域:

  • 生物化学 生物化学
  • 葡萄糖生物学 葡萄糖生物学
  • 计算生物学 计算生物学

背景情况:

  • 甘氨酸 (复杂的寡糖) 在生物过程和疾病中起着至关重要的作用.
  • 目前的甘氨酸测序方法耗时,需要专门的专业知识.
  • 有效的甘氨酸分析对于理解生物功能和疾病机制至关重要.

研究的目的:

  • 评估使用莱克结合指纹测序甘氨酸的可行性.
  • 开发一种基于莱克相互作用的可预测模型来确定基于莱克结构的甘氨酸结构.
  • 通过提供更容易获得的甘氨酸分析方法来简化糖蛋白研究.

主要方法:

  • 训练一个博尔茨曼模型在一个数据集的指纹结合莱克.
  • 使用预测的甘氨酸结构对N-甘氨酸和O-甘氨酸.
  • 在中国汉姆斯特卵巢 (CHO) 细胞甘氨酸上测试模型的概括性.
  • 分析莱克基因特异性和甘氨酸特征的预测能力.

主要成果:

  • 博尔茨曼模型在预测近似的甘氨酸结构方面取得了很高的准确性:N-甘氨酸的88 ± 7%,O-甘氨酸的87 ± 13%.
  • 该模型证明了有效地将其泛化到具有药学意义的CHO细胞甘氨酸.
  • 确定了对预测准确性有助于预测准确性的关键莱克和甘氨酸特征.

结论:

  • 与博尔茨曼模型相结合的莱克结合指纹为甘氨酸测序提供了一种可行和准确的方法.
  • 这种方法有可能显著简化和加速糖蛋白研究.
  • 这些发现为研究人员提供了宝贵的见解,他们在糖生物学研究中利用乳清素.