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相关概念视频

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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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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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...
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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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Signal Sequences and Sorting Receptors01:41

Signal Sequences and Sorting Receptors

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Signal sequences are short amino acid sequences that guide newly synthesized proteins to their proper location within the cell. Classical signal sequences are fifteen to sixty amino acids long and present at the N-terminus of a polypeptide chain. Each signal sequence has a conserved segment of basic residues towards their N terminus, a hydrophobic core, and a C-terminus rich in polar residues. The C-terminus also contains a signal cleavage site and features a -3 -1 sequence motif. The -3-1...
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Protein and Protein Structure02:15

Protein and Protein Structure

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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.
A protein's shape is critical to its function. For example, an enzyme...
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Updated: Jun 13, 2025

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
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Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

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epLSAP-Align:一种非顺序蛋白质结构对齐解决器,具有调整的部分线性和赋值问题制定方法.

Xuechen Zhang1, Zhuoyang Chen2, Junyu Li3

  • 1Department of Electronic and Computational Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China.

Bioinformatics (Oxford, England)
|May 21, 2025
PubMed
概括
此摘要是机器生成的。

一种名为epLSAP-Align的新方法解决了非序列蛋白质结构对齐的挑战. 这种方法提高了了解蛋白质功能和演变的准确性和效率.

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科学领域:

  • 计算生物学是一种计算生物学.
  • 结构生物信息学 结构生物信息学
  • 蛋白质结构分析分析蛋白质结构分析

背景情况:

  • 三维蛋白质的三维结构对齐对于理解蛋白质的功能和进化至关重要.
  • 现有的顺序对齐算法与表现出非顺序相似性的远距离相关结构进行斗争.
  • 当前的非顺序对齐工具往往缺乏效率和准确性.

研究的目的:

  • 将非顺序的蛋白质结构对齐定制为由规则化的部分线性总和分配问题 (epLSAP).
  • 使用Sinkhorn算法 (epLSAP-Align) 开发一种非顺序对齐的高效和准确的解决方案.

主要方法:

  • 制定非顺序对齐作为输入法规化的部分线性总和分配问题 (epLSAP).
  • 基于Sinkhorn算法的解决方案开发,命名为epLSAP-Align.
  • 将epLSAP-Align集成到现有框架 (TM-align,MICAN) 中,以创建epLSAP-TM和epLSAP-MICAN.

主要成果:

  • epLSAP-Align明确模拟差距处罚,实现全球最佳性,并平衡覆盖范围和忠实性.
  • 与现有的非顺序对齐工具相比,epLSAP-TM和epLSAP-MICAN在各种基准数据集上表现出卓越的性能.
  • epLSAP-TM显示速度比USalign2.0提高了至少22%.

结论:

  • epLSAP-Align为非序列蛋白质结构对齐提供了一种新且有效的方法.
  • 综合工具epLSAP-TM和epLSAP-MICAN推动了结构生物信息学领域的发展.
  • 该方法为分析蛋白质结构相似性提供了更准确,更有效的手段.