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相关概念视频

Nucleic Acid Structure01:25

Nucleic Acid Structure

8.4K
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
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RNA Structure01:19

RNA Structure

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The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
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RNA Structure01:23

RNA Structure

78.8K
Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
78.8K
Nucleic Acids02:43

Nucleic Acids

49.7K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
49.7K
Nucleic acids02:43

Nucleic acids

188.4K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
188.4K
RNA Interference01:23

RNA Interference

27.8K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
27.8K

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相关实验视频

Updated: Jan 17, 2026

Modeling the Functional Network for Spatial Navigation in the Human Brain
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Modeling the Functional Network for Spatial Navigation in the Human Brain

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图表神经网络和扩散模型用于模拟RNA原子间相互作用.

Marek Justyna1, Craig Zirbel2, Maciej Antczak1,3

  • 1Institute of Computing Science, Poznan University of Technology, Poznan 60-965, Poland.

Bioinformatics (Oxford, England)
|September 19, 2025
PubMed
概括
此摘要是机器生成的。

这项研究介绍了GraphaRNA,一种使用图形神经网络的新计算方法,用于准确预测新型核糖核酸 (RNA) 结构. 图形RNA很好地对未见的RNA家族进行概括,并尊重用户定义的约束.

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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
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相关实验视频

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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

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Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion
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科学领域:

  • 计算生物学 计算生物学
  • 结构生物学 结构生物学
  • 生物信息学是一种生物信息学.

背景情况:

  • 核糖核酸 (RNA) 的功能是由其3D结构决定的,但像X射线结晶学,NMR和冷EM这样的实验方法往往缺乏原子分辨率.
  • 目前的深度学习RNA结构预测工具 (例如,AlphaFold3,trRosettaRNA) 在已知的RNA家族中表现出色,但在新型或合成结构中扎.
  • 准确的in silicoRNA结构预测对于理解RNA功能和设计新的基于RNA的治疗方法至关重要.

研究的目的:

  • 开发和评估一种用于准确预测核糖核酸 (RNA) 结构的新型计算方法.
  • 探索图形神经网络 (GNN) 和无效扩散概率模型 (DDPMs) 的实用性,以学习RNA中的原子间相互作用.
  • 评估拟议方法对未见的RNA结构的概括能力及其纳入用户定义约束的能力.

主要方法:

  • 用粗粒度的五原子表示形式将RNA分子建成图形.
  • 图形神经网络和无误的扩散概率模型被用来学习原子间相互作用.
  • 该模型在局部RNA描述器上进行了训练和评估,评估了不同RNA家族 (rRNA,tRNA和其他) 的概括性.

主要成果:

  • 提出的方法证明了可靠的结构预测未见的局部RNA描述符.
  • 该方法有效地遵守了用户定义的约束,包括沃森-克里克-弗兰克林基配对相互作用.
  • 图形RNA显示了预测超出训练集中的新RNA家族结构的前景.

结论:

  • 使用GNN和DDPM的GraphaRNA为in silicoRNA结构预测提供了一个强大的方法,特别是用于新型或合成RNA序列.
  • 该方法的概括和结合约束的能力提高了它对各种RNA结构预测任务的实用性.
  • 这项工作为推进结构生物学和基于RNA的研究提供了有价值的工具.