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関連する概念動画

Regulated mRNA Transport02:22

Regulated mRNA Transport

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In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
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Overview of Protein Sorting and Transport01:45

Overview of Protein Sorting and Transport

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Eukaryotic cells have different membrane-bound organelles with distinct protein requirements. The process by which proteins are targeted to a specific organelle is called protein sorting.
Protein sorting can be of two types: signal-based sorting and vesicle-based trafficking. In signal-based sorting, specific amino acid sequences called sorting signals target proteins to the proper location inside the cell either via gated transport or by protein translocation.  In gated transport, folded...
23.7K
Nuclear Protein Sorting01:34

Nuclear Protein Sorting

6.7K
Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
6.7K
Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

8.5K
Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
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Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

3.5K
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
3.5K
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

4.5K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
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関連する実験動画

Updated: Apr 20, 2026

In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells
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In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells

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細胞がどこにいるかを知る方法

Arthur D Lander1

  • 1Department of Developmental and Cell Biology, and Center for Complex Biological Systems, University of California Irvine, Irvine, CA 92697, USA. adlander@uci.edu

Science (New York, N.Y.)
|February 23, 2013
PubMed
まとめ
この要約は機械生成です。

細胞は,発達と生理学について,位置に基づいた決定を下します. これらの細胞プロセスの高い信頼性を達成するには,特に開発中に,単純な原理を超えた複雑な戦略が必要です.

さらに関連する動画

Heterokaryon Technique for Analysis of Cell Type-specific Localization
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Heterokaryon Technique for Analysis of Cell Type-specific Localization

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Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
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Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells

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関連する実験動画

Last Updated: Apr 20, 2026

In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells
09:20

In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells

Published on: July 23, 2010

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Heterokaryon Technique for Analysis of Cell Type-specific Localization
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Heterokaryon Technique for Analysis of Cell Type-specific Localization

Published on: March 11, 2011

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Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
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科学分野:

  • 細胞生物学 細胞生物学
  • 発達生物学 発達生物学とは
  • 生理学 生理学とは

背景:

  • 細胞の位置は,植物と動物の発達,再生,および日常の生理学的機能に不可欠です.
  • 細胞が自分の位置を感知することを可能にするメカニズムは,生物学的プロセスにとって根本的なものです.
  • 表面的にはシンプルですが,細胞の空間認識を制御する原理は,特に開発中に,高い信頼性が不可欠であるときに複雑になります.

研究 の 目的:

  • 細胞が自分の位置を決定するために使っている複雑な戦略を探求する.
  • 細胞が拡散性分子,制御回路,遺伝子調節ネットワークからの情報を統合する方法を理解する.
  • 細胞の空間感知メカニズムと,現実世界の生物学的精度と正確さの要求の間のギャップを埋めるために.

主な方法:

  • 拡散シグナル分子の分析.
  • セルラー制御回路の調査.
  • 遺伝子調節ネットワークの検討.

主要な成果:

  • セルロースの位置決定は,高い信頼性が求められる場合,単純な原理ではなく,複雑な原理によって導かれます.
  • 多様な分子信号,制御回路,遺伝子ネットワークが,細胞の空間的認識に寄与する.
  • 生物学的システムは,複雑な細胞メカニズムと,精度と精度に関する厳しい要求を調和させなければならない.

結論:

  • 細胞の正確な空間的組織は,発達と機能に不可欠であり,洗練された複雑な生物学的戦略に依存しています.
  • これらの戦略を理解することは,発達生物学と再生医療の課題に取り組むための鍵です.
  • 将来の研究は,分子機構と生物学的システムの機能的制約の相互作用に焦点を当てなければならない.