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Membrane Domains01:18

Membrane Domains

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The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
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Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
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Distribution of Cytoplasmic Content02:33

Distribution of Cytoplasmic Content

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Cytokinesis segregates a cell’s chromosomes and organelles into its daughter cells. Organelles divide and grow prior to cell division but cannot be synthesized de novo; therefore, cells must receive at least one copy of each organelle to survive. Currently, many of the details of how the organelles are distributed are not yet fully elucidated.
Distribution of cytoplasmic determinants
The cytoplasm contains various organelles, as well as salts, proteins, and water. The distribution of...
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What are Lipids?01:38

What are Lipids?

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What are Lipids?01:31

What are Lipids?

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Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms.  The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
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Lipids are a structurally and functionally diverse group of hydrocarbons—compounds consisting of carbon and hydrogen atoms. The carbon-carbon and...
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Determining the Plane of Cell Division02:13

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Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function. 
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
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分裂する細胞は,その脂質組成と局所を調節する.

G Ekin Atilla-Gokcumen1, Eleonora Muro2, Josep Relat-Goberna3

  • 1Department of Biological Chemistry and Molecular Pharmacology and Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.

Cell
|January 28, 2014
PubMed
まとめ
この要約は機械生成です。

細胞分裂には,重要な膜の変化が伴う. この研究は,細胞が分裂中の脂質組成と局所化を積極的に調節し,細胞力学と中体形成に影響を及ぼすことを明らかにしています.

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科学分野:

  • 細胞生物学 細胞生物学
  • バイオケミストリー バイオケミストリー
  • バイオフィジックス 生物物理学

背景:

  • 細胞分裂は,広範な膜の再編成を必要とします.
  • 細胞分裂における脂質の特定の役割は,ほとんど不明のままである.
  • 脂質ダイナミクスを理解することは,細胞サイクル進行を理解するために不可欠です.

研究 の 目的:

  • 細胞周期中の脂質群の変化を調査する.
  • 細胞分裂に関与する特定の脂質と酵素を特定する.
  • 分裂する細胞とその脂質の機械的性質を探求する.

主な方法:

  • 脂質プロファイリングのための液体染色体-質量スペクトロメトリー (LC-MS).
  • 原子力顕微鏡 (AFM) で,機械的性質を評価する.
  • 必須の脂質生物合成酵素を特定するためのRNA干渉 (RNAi).

主要な成果:

  • 11種類の特定の脂質が分裂する細胞に蓄積される.
  • 分裂する細胞は,分裂しない細胞と比較して,異なる機械的性質を示します.
  • 中体への脂質の局所化は,細胞分裂中に積極的に調節されます.

結論:

  • 細胞は分裂中に脂質の組成と局所を動的に調節する.
  • 脂質は,細胞分裂における信号伝達と構造的役割の両方を果たします.
  • この研究は,基本的な生物学的プロセスにおける脂質の不可欠な役割を強調しています.