氨酸残留物在蛋白质转接合的速度限制步骤中发挥着密切的作用
Neel H Shah1, Ertan Eryilmaz, David Cowburn
1Department of Chemistry, Princeton University, Frick Laboratory, Princeton, New Jersey 08544, USA.
Journal of the American Chemical Society
|March 20, 2013
概括
分裂整蛋白对蛋白质半合成至关重要. 了解C-extein序列如何影响分裂蛋白活性,揭示了提高蛋白质拼接效率的结构洞察力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 分裂整体是各种蛋白质工程应用中使用的蛋白质拼接域.
- 菌DnaE整因提供快速的蛋白质拼接,但对侧面的extein序列敏感.
- 序列约束限制了在蛋白质修饰中分割整因的更广泛应用.
研究的目的:
- 为了动态分析C-extein组合对分裂蛋白活性的影响.
- 阐明蛋白质拼接中C-extein序列依赖的结构基础.
- 找出重新设计整体的策略,以改善它们的乱伦性.
主要方法:
- 用不同的C-extein序列进行分离中蛋白拼接的详细动态分析.
- 结构研究包括X射线结晶学或冷EM.
- 模拟分子动力学以研究蛋白质动力学.
主要成果:
- 确定了C-extein序列和分离蛋白拼接动力学和产量之间的强烈相关性.
- 结构和分子动力学研究表明,第二个C-extein残留物影响着催化残留物的构成.
- 证明了特定的结构区域可以被修改以增强内部的乱交.
结论:
- 第二个C-extein残留物通过限制催化残留物运动,在调节分裂中蛋白活性方面发挥着至关重要的作用.
- 了解这些结构-功能关系使得我们能够合理设计出更具多功能性的蛋白质工程的分裂整体.
- 这项工作为开发具有更广泛生物技术应用的散乱性增加的分裂性提供了基础.
相关概念视频
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Chromatin Structure Regulates pre-mRNA Processing
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
Pre-mRNA Processing: RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...

