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相关概念视频

Protein Organization01:13

Protein Organization

Overview
Protein Folding01:22

Protein Folding

Overview
Cotranslational Protein Translocation01:20

Cotranslational Protein Translocation

Translocation of proteins across membranes is an ancient process that occurs even in bacteria and archaebacteria. In fact, the components of the translocation machinery are still conserved between prokaryotes and eukaryotes.
Sec61 channel partners for cotranslational translocation
During cotranslational translocation, the Sec61 channel partners with the signal recognition particle (SRP), the signal recognition particle receptor (SR), and the ribosomes to transport the nascent polypeptide chain...
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Protein Translocation Machinery on the ER Membrane01:28

Protein Translocation Machinery on the ER Membrane

The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

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相关实验视频

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Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
07:08

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Published on: July 14, 2015

通过转移的偏磁转移来确定蛋白质-连接体复合物的结构.

Michael John1, Guido Pintacuda, Ah Young Park

  • 1Australian National University, Research School of Chemistry, Canberra, ACT 0200, Australia.

Journal of the American Chemical Society
|September 28, 2006
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新型的核磁共振 (NMR) 方法,使用偏磁兰坦化离子快速确定小分子在溶液中的蛋白质标上的3D结构和结合方向.

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07:08

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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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科学领域:

  • 生物化学 生物化学
  • 结构生物学 结构生物学
  • 化学生物学 化学生物学

背景情况:

  • 合理的药物设计需要了解蛋白质-配体复杂结构.
  • 在溶液中确定这些结构对于药物发现至关重要.
  • 现有的方法可能耗时或需要特定的标签.

研究的目的:

  • 开发一种快速的方法来确定与蛋白质结合的小连接体的3D结构.
  • 为了同时确定连接体与蛋白质标相对的位置和方向.
  • 为改进药物设计和分子相互作用研究提供一个工具.

主要方法:

  • 利用了核磁共振 (NMR) 光谱学与偏磁性兰坦化离子.
  • 在自然同位素丰度下分析了依赖度的 (1) H 和 (13) C 连接体光谱.
  • 集成的偏磁数据与已知的蛋白质结构和胺磁性.

主要成果:

  • 成功确定了与蛋白质复合体结合的蒂米丁的3D结构,位置和方向.
  • 验证了该方法在涉及大肠杆菌DNA聚合酶III组件的三元复合体上的有效性.
  • 从简单的1DNMR光谱证明了快速的结构确定.

结论:

  • 这种新型的NMR策略能够快速准确地确定溶液中的蛋白质-连接体复杂结构.
  • 这种方法有助于理解分子相互作用,并有助于合理的药物设计.
  • 这种方法是多用途的,适用于各种蛋白质-连接体系统.