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相关概念视频

Organization of Genes02:07

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RNA Splicing01:32

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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...
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Non-LTR Retrotransposons03:18

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As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
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LTR Retrotransposons03:08

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LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
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Alternative RNA Splicing02:18

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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...
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Exon Recombination02:32

Exon Recombination

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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
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组II 内部:高度结构化但动态.

Esra Ahunbay1, Susann Zelger-Paulus2, Roland K O Sigel3

  • 1Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich. esra.ahunbay@chem.uzh.ch.

Chimia
|December 4, 2023
PubMed
概括
此摘要是机器生成的。

第二组内子是自我拼接的核糖酶,对RNA成熟至关重要. 对酵母 Sc.ai5γ 内的研究揭示了其催化性能和生物技术应用的潜力.

关键词:
第2组 内部 内部 内部在RNA催化过程中,RNA催化在RNA折叠过程中.标记RNA的标记是RNA的标记.通过RNA拼接进行RNA拼接.

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科学领域:

  • 分子生物学分子生物学
  • 生物化学 生化学
  • 在RNA生物学,RNA生物学.

背景情况:

  • RNA拼接对于mRNA成熟至关重要.
  • 第二组内子是自我催化 ribozymes 在RNA 处理和移动遗传元素中发挥作用.
  • 酵母线粒体 Sc.ai5γ 内子是研究II组内子的一个模型系统.

研究的目的:

  • 审查II组内研究的历史和进展.
  • 为了突出Sc.ai5γ内的意义.
  • 探索II组内子在生物技术和治疗中的潜力.

主要方法:

  • 生物化学试验用于研究催化活性.
  • 生物物理技术用于研究结构和动态.
  • 计算建模用于结构和功能洞察力.

主要成果:

  • 第二组内部子是古老的,多功能RNA机器.
  • Sc.ai5γ 具有复杂的催化和动态特性.
  • 对Sc.ai5γ的研究推动了RNA生物学中的方法学进步.

结论:

  • 通过Sc.ai5γ示例的II组内子是理解RNA催化和进化的关键.
  • 研究这些内子为治疗和生物技术创新提供了有前途的途径.