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相关概念视频

Protein Folding01:25

Protein Folding

7.8K
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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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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Protein Denaturation01:28

Protein Denaturation

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The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
3.9K
Proteins: From Genes to Degradation02:11

Proteins: From Genes to Degradation

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Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick.  Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA...
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Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Tagging and Fusion Proteins01:24

Tagging and Fusion Proteins

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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
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相关实验视频

Updated: Jun 4, 2025

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
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PTSP-BERT:使用基于序列的双向表示,从变压器嵌入的特征来预测蛋白质的热稳定性.

Zhibin Lv1, Mingxuan Wei1, Hongdi Pei2

  • 1College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China.

Computers in biology and medicine
|December 21, 2024
PubMed
概括

我们开发了PSTP-BERT,这是一个深度学习模型,用于从序列直接分类热性,中性和心理性蛋白质. 该模型在三类识别和二进制分类任务中显著优于现有方法.

关键词:
贝尔特 (BERT) 公司深度学习是一种深度学习.心理爱好者蛋白质是一种心理爱好者蛋白质.热友蛋白质是一种热友蛋白质.三个类别的识别标识.

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Last Updated: Jun 4, 2025

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科学领域:

  • 生物技术是生物技术.
  • 生物信息学是一种生物信息学.
  • 蛋白质工程是指蛋白质工程.

背景情况:

  • 来自热性,中性和精神性生物体的蛋白质具有多样化的工业应用.
  • 目前用于确定最佳蛋白质温度的方法很费力,现有的机器学习模型仅限于二进制分类.

研究的目的:

  • 开发一种基于氨基酸序列的深度学习模型,用于直接识别热友蛋白,中友蛋白和心理友蛋白的三类鉴定.
  • 通过数据集平衡和特征权重技术来提高分类准确性.

主要方法:

  • 开发了PSTP-BERT,这是一个深度学习模型,利用BERT-bfd功能进行蛋白质分类.
  • 使用SMOTE (合成少数人过量抽样技术) 来进行数据集平衡.
  • 使用光梯度增强机来进行特征权重和选择.

主要成果:

  • 通过PSTP-BERT实现了5倍的交叉验证准确率为89.59%,独立测试准确率为85.42%,用于三类识别.
  • 该模型在二元分类任务中表现出卓越的性能,热友蛋白达到93.33%,心理友蛋白达到88.33%.
  • 独立测试准确度在89.8%至92.9%之间,新数据预测率超过97%.

结论:

  • 基于其最佳生长温度来分类蛋白质的现有模型中,PSTP-BERT提供了显著的进步.
  • 该模型为研究人员提供了一个方便和准确的工具,源代码可在GitHub上找到.