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相关概念视频

Fine Adjustment of Caenorhabditis elegans Orientation on Channeled Agar Pads for Imaging Neuroregeneration05:12

Fine Adjustment of Caenorhabditis elegans Orientation on Channeled Agar Pads for Imaging Neuroregeneration

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Here, we present a protocol for fabricating channeled agar pads using PDMS molds created from vinyl records. The channels enable users to finely orient Caenorhabditis elegans to improve imaging contrast and facilitate the comparison of structures. These capabilities are particularly useful in neuroregeneration studies.
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Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile05:46

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

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This article provides a step-by-step guide to correcting presbyopia with a monocular bi-aspheric ablation...
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An Introduction to Processing, Fitting, and Interpreting Transient Absorption Data08:12

An Introduction to Processing, Fitting, and Interpreting Transient Absorption Data

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This protocol is a beginner's entryway into processing, fitting, and interpreting transient absorption spectra. The focus of this protocol is the preparation of datasets, and fitting using both single wavelength kinetics and global lifetime analysis. Challenges associated with transient absorption data and its fitting are discussed.
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High-Accuracy Correction of 3D Chromatic Shifts in the Age of Super-Resolution Biological Imaging Using Chromagnon08:18

High-Accuracy Correction of 3D Chromatic Shifts in the Age of Super-Resolution Biological Imaging Using Chromagnon

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Correction of chromatic shifts in three-dimensional (3D) multicolor fluorescence microscopy images is crucial for quantitative data analyses. This protocol is developed to measure and correct chromatic shifts in biological samples through acquisition of suitable reference images and processing with the open-source software,...
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Operation of the Collaborative Composite Manufacturing (CCM) System10:09

Operation of the Collaborative Composite Manufacturing (CCM) System

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A collaborative composite manufacturing system is developed for robotic lay-up of composite laminates using the prepreg tape. The proposed system allows the production of composite laminates with high levels of geometrical complexity. The issues in the path planning, coordination of the robots and control are addressed in the proposed...
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Proofreading and DNA Repair Assay Using Single Nucleotide Extension and MALDI-TOF Mass Spectrometry Analysis11:08

Proofreading and DNA Repair Assay Using Single Nucleotide Extension and MALDI-TOF Mass Spectrometry Analysis

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A non-labeled, non-radio-isotopic method for DNA polymerase proofreading and a DNA repair assay was developed by using high-resolution MALDI-TOF mass spectrometry and a single nucleotide extension strategy. The assay proved to be very specific, simple, rapid, and easy to perform for proofreading and repair patches shorter than 9-nucleotides.
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相关实验视频

Updated: Jan 2, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
05:46

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

Published on: September 20, 2024

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细菌的结合蛋白TrwB类似于环酶和F1-ATPase.

F X Gomis-Rüth1, G Moncalián, R Pérez-Luque

  • 1Institut de Biologia Molecular de Barcelona, CSIC, Spain.

Nature
|February 24, 2001
PubMed
概括

研究人员阐明了TrwB的结构,TrwB是细菌结合和水平基因转移中的关键蛋白质. 这一发现促进了对跨细胞膜的DNA转移机制的理解.

科学领域:

  • 分子生物学分子生物学
  • 结构生物学 结构生物学
  • 微生物学 微生物学

背景情况:

  • 跨膜的DNA转移对于生物过程至关重要,比如水平基因转移.
  • 细菌结合是横向基因转移的主要机制,可以快速获得抗生素耐药性等特征.
  • 来自大肠杆菌R388的TrwB蛋白对细菌结合至关重要.

研究的目的:

  • 为了确定TrwB蛋白的可溶性变体的三维结构.
  • 了解细菌结合期间DNA转移的分子机制.

主要方法:

  • 用X射线结晶学或冷电子显微镜来确定TrwB的3D结构.
  • 生物化学分析研究TrwB的DNA结合和复杂形成.

主要成果:

  • 确定了可溶性TrwB变体的三维结构.
  • TrwB包括一个核酸结合域和一个全α域.
  • 六个TrwB单体组合成一个具有中央通道的六合体,结构上类似于F1-ATPase.

结论:

  • 确定的结构提供了关于TrwB在招募DNA和促进结合期间链转移中的作用的见解.

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  • 与F1-ATPase的结构相似性可能表明,参与DNA传输的分子电机中存在着保守的机制.