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相关概念视频

Mismatch Repair01:20

Mismatch Repair

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Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
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The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
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Aip1p Dynamics Are Altered by the R256H Mutation in Actin
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P176S突变重新连接改变Maspin功能的静电相互作用.

Muhammad Ayaz Anwar1, Muhammad Haseeb2, Sangdun Choi2

  • 1Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin 17104, Republic of Korea.

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概括
此摘要是机器生成的。

马斯皮恩 (Maspin) 是一个著名的建筑.

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科学领域:

  • 瘤原蛋白的功能的蛋白质.
  • 分子动力学模拟的模拟.
  • 蛋白质与蛋白质的相互作用

背景情况:

  • 马斯宾的瘤抑制作用取决于背景.
  • 多态的maspin变体 (例如,maspin-S176,maspin-P176) 对瘤进展表现出相反的影响.
  • 关于maspin功能的相互矛盾的报告可能源于其多态形式.

研究的目的:

  • 为了调查maspin多态形态形式相互冲突的作用的分子基础.
  • 使用计算方法,建立maspin变体和瘤进展之间的联系.
  • 为了阐明maspin的结构和相互作用如何在变体之间不同.

主要方法:

  • 使用了长分子动力学模拟.
  • 分析动态稳定性,差异接触和静电能量.
  • 在maspin变种中研究改变的极点接触和全控制.

主要成果:

  • 马斯表现出动态稳定性,无论氨基酸在位置176.的氨基酸.
  • 多态形态表现出差异性的残余间接触和改变的静电能量.
  • 在maspin变体中改变的静电学会破坏全控制并改变结合伙伴相互作用.

结论:

  • 该研究阐明了maspin的多态形式如何导致不同的蛋白质-辅因子相互作用景观.
  • 马斯宾变种中变化的静电特性会影响结合伙伴的定位和偏好.
  • 了解这些分子差异可以指导针对癌症的治疗策略.