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相关概念视频

From DNA to Protein03:06

From DNA to Protein

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The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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The Central Dogma01:25

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Overview
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Leaky Scanning02:28

Leaky Scanning

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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Transfer RNA Synthesis02:36

Transfer RNA Synthesis

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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
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Cis-regulatory Sequences02:02

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Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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Ribosome Profiling02:24

Ribosome Profiling

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
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Identification of Circular RNAs using RNA Sequencing
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Identification of Circular RNAs using RNA Sequencing

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通过codon使用标识的圆形代码.

Christian J Michel1

  • 1Theoretical bioinformatics, ICube, University of Strasbourg, C.N.R.S., 300 Boulevard Sébastien Brant, 67400 Illkirch, France.

Bio Systems
|August 19, 2024
PubMed
概括
此摘要是机器生成的。

一种使用子使用的新一统计方法惊人地发现了基因中的循环代码. 这种方法简化了对循环代码的搜索,并解释了不同生物体之间的代码变异性.

关键词:
考古物 (Archaea) 是一种古老的物种.细菌 细菌是一种细菌.科登使用 科登使用单核生物是真核生物.基因 基因 基因 基因统计的一框架方法.三核酸圆形代码的三核酸.三核酸代码是三核酸的代码.

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科学领域:

  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.
  • 计算生物学 计算生物学

背景情况:

  • 自1996年以来,基因中的圆形代码一直在使用6种3统计方法进行研究,分析三核酸频率和相关性.
  • 以前的方法很难通过单独使用代码来识别循环代码,从而限制了循环代码理论的使用.
  • 识别圆形代码一直是分子生物学中长期存在的挑战.

研究的目的:

  • 开发一种新的统计方法来识别基因中的循环代码.
  • 为了研究在循环代码识别中代码使用的作用.
  • 为了解释在不同生命领域观察到的遗传密码的变异性.

主要方法:

  • 开发了一种新的1统计方法,仅基于代码的使用.
  • 应用循环代码条件,包括排列类,到新方法.
  • 引入了一个新的参数来分析代使用分散.

主要成果:

  • 新的1方法成功地在细菌和平均基因中确定了最大的C3自补三核酸循环代码X.
  • 细菌和古生物学基因表现出类似的编码子使用分散,明显高于真核生物基因.
  • 这一发现为真核生物中更大的代码变异性提供了潜在的解释.

结论:

  • 生物学家现在可以有效地搜索循环代码,只使用代码的使用,而不需要分析移动的框架.
  • 新方法简化了研究圆形代码及其在基因组和基因水平上的变异.
  • 这些发现提供了对不同生命形式中遗传代码的进化动态的洞察.