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相关概念视频

Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

5.4K
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Protein Organization01:24

Protein Organization

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
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Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.0K
Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Protein Folding01:25

Protein Folding

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
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相关实验视频

Updated: Jan 9, 2026

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules

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使用离散扩散模型进行全原子蛋白序列设计.

Amelia Villegas-Morcillo1, Gijs J Admiraal1, Marcel J T Reinders1

  • 1Department of Intelligent Systems, Delft University of Technology, Delft , The Netherlands.

Journal of cheminformatics
|December 2, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了使用SELFIES的全原子蛋白序列生成方法,增强了蛋白质设计的新性和多样性. 虽然在生成有效蛋白质方面仍然存在挑战,但这种方法提供了超越传统氨基酸序列的更广泛的可能性.

关键词:
所有原子的表示.离散的扩散模型生成式建模生成式建模蛋白质序列设计的设计.

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科学领域:

  • 计算生物学是一种计算生物学.
  • 蛋白质工程是一种蛋白质工程.
  • 人工智能在药物发现中的作用

背景情况:

  • 传统的蛋白质序列表示限制了非正规氨基酸和翻译后修改的包含.
  • 提升蛋白质设计是医学和生物技术突破的关键.

研究的目的:

  • 探索使用全原子化学表示 (SELFIES) 的新型蛋白质序列生成的离散扩散模型.
  • 与基于氨基酸的模型相比,评估全原子表示对蛋白质质量,多样性和新性的影响.
  • 在扩散过程中评估不同噪声时间表 (均与吸收) 的有效性.

主要方法:

  • 在离散扩散D3PM框架内使用了修改后的ByteNet架构.
  • 采用SELFIES (类似SMILES) 的全原子化学表示来表示蛋白质序列.
  • 开发了一个全面的评估管道,以验证规范和非规范氨基酸含量生成的蛋白质序列.
  • 使用统一的和吸收噪音的时间表来比较发电性能.

主要成果:

  • 与基于氨基酸的模型相比,使用全原子表示的模型产生了具有更好的新性和多样性的蛋白质.
  • 使用全原子方法成功生成的蛋白质表现出可比的结构折叠性.
  • 全原子表示在持续生成完全有效的蛋白质序列方面遇到了挑战.
  • 吸收噪声的时间表被证明是最有效的,无论是基于全原子和氨基酸的表征.

结论:

  • 全原子的SELFIES表示显示了增强蛋白质序列生成的新性和多样性的承诺.
  • 需要进一步的细化,以确保与非正规元素一致生成有效的蛋白质结构.
  • 吸收噪声时间表被推用于优化蛋白序列生成中的离散扩散模型.