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相关概念视频

Protein Glycosylation01:25

Protein Glycosylation

9.2K
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...
9.2K
Oligosaccharide Assembly01:24

Oligosaccharide Assembly

3.5K
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...
3.5K
Glycocalyx and its Functions01:14

Glycocalyx and its Functions

7.7K
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.
7.7K
Proteoglycans01:05

Proteoglycans

4.6K
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,...
4.6K

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相关实验视频

Updated: Jan 8, 2026

Bioinformatics Resources for the Study of Glycan-Mediated Protein Interactions
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GlyContact分析了基甘3D结构的尺度.

Luc Thomès1, Roman Joeres2,3,4, Zeynep Akdeniz2,3

  • 1University Lille, CHU Lille, ULR 7364 - RADEME - Maladies RAres du DÉveloppement embryonnaire et du Métabolisme, Lille, France.

Nature communications
|December 12, 2025
PubMed
概括

GlyContact是一个新的Python包,用于分析3D甘氨酸结构. 它有助于了解甘氨酸结构如何影响功能,并改善了对莱克-甘氨酸结合的预测.

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相关实验视频

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科学领域:

  • 碳水化合物化学和结构生物学.
  • 计算型糖生物学和生物信息学.

背景情况:

  • 甘氨酸是复杂的生物分子,具有具有挑战性的结构特征,阻碍了对它们的结构功能关系的理解.
  • 像GlycoShape这样的现有数据库提供了来自模拟的3D甘氨酸结构,但需要用于分析的工具.

研究的目的:

  • 介绍GlyContact,这是一个开源的Python包,用于检索,处理和分析3D甘氨酸结构.
  • 为了证明GlyContact在探索甘氨酸结构动态及其对生物相互作用的影响方面的实用性.

主要方法:

  • 开发用于糖结构分析的GlyContact Python包.
  • 使用分子动力学 (MD) 模拟,NMR和X射线结晶学数据.
  • ·米塞斯图形神经网络的应用,用于预测二糖体扭转角分布.

主要成果:

  • GlyContact揭示了序列上下文对甘氨酸基因型结构的影响.
  • 该包提供了关于糖甘灵活性和表面可访问性的见解,提高了大约7%的莱克结合预测.
  • 能够准确地预测二糖体之间的扭转角分布.

结论:

  • GlyContact促进了对3D甘氨酸结构的探索,为其生物功能提供了有价值的见解.
  • 该工具增强了对甘氨酸-乳氨酸相互作用和结构动态的理解.
  • GlyContact是一个开放式访问资源,赋予糖生物学研究人员权力.