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相关概念视频

The Nucleus01:32

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Nuclear Magnetic Resonance (NMR): Overview01:07

Nuclear Magnetic Resonance (NMR): Overview

Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
The Nucleus01:25

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
The Nucleus01:25

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...

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相关实验视频

Updated: May 8, 2026

Analyzing and Building Nucleic Acid Structures with 3DNA
16:24

Analyzing and Building Nucleic Acid Structures with 3DNA

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NucleoFind:一个用于解释核酸电子密度的深度学习网络.

Jordan S Dialpuri1, Jon Agirre1, Kathryn D Cowtan1

  • 1York Structural Biology Laboratory, Department of Chemistry, University of York, York, UK.

Nucleic acids research
|August 20, 2024
PubMed
概括
此摘要是机器生成的。

新的深度学习方法NucleoFind准确地解释了核酸电子密度图. 这种方法显著改善了从X射线结晶学数据中自动构建准确和完整的核酸模型.

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科学领域:

  • 结构生物学 结构生物学
  • 计算生物学 计算生物学
  • 生物物理学的生物物理.

背景情况:

  • 在分相后解释核酸电子密度图是计算上具有挑战性的.
  • 目前的方法通常依赖于缓慢,详尽的功能识别搜索.

研究的目的:

  • 开发一种基于深度学习的方法,用于准确解释和细分核酸电子密度.
  • 改进核酸模型在X射线晶体学中的自动化.

主要方法:

  • 深度学习模型NucleoFind被开发用于解释电子密度图.
  • 该模型预测了酸盐,糖和基基组的位置.

主要成果:

  • 在预测原子位置方面,NucleoFind取得了很高的准确性:酸盐为78%,糖为85%,基原子为83%.
  • 该方法应用于通过分子替代获得的电子密度图.

结论:

  • NucleoFind为核酸电子密度解释提供了一个计算效率高,准确的解决方案.
  • 这种方法有助于自动构建更精确,更完整的核酸模型.