膀の輸送でシリウムに移動する
1Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada. leroux@sfu.ca
Cell
|June 19, 2007
まとめ
バルデット-ビデル症候群 (BBS) のタンパク質密輸の欠陥が病気を引き起こす. A BBSタンパク質複合体とRabin8は,シリアを形成し,タンパク質をシリアに移動するために協力します.
科学分野:
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
- 人間の病気 ヒトの病気
背景:
- バルデット・ビドル症候群 (BBS) は,細胞タンパク質密輸欠陥に関連したヒト遺伝疾患である.
- シリア内へのタンパク質輸送は,シリアの機能と形成に不可欠です.
研究 の 目的:
- BBSの基礎となる分子機構を調査する.
- シリア形成とタンパク質輸送に関与するタンパク質と経路を特定する.
主な方法:
- BBSに関連するタンパク質複合体とRab8 GTPase調節体の相互作用を研究した.
- 細胞ベースの測定法を使用して,シリア形成とタンパク質の局所化を評価しました.
主要な成果:
- BBSに関連するタンパク質の大きな複合体は,Rab8.8のためのグアニンヌクレオチド交換因子であるRabin8と協力することが判明しました.
- この協力は,シリアの形成を促進するために不可欠です.
- この発見は,膜タンパク質のシリウムへの移動に役割があることを示唆している.
結論:
- この研究では,BBSタンパク質複合体とRabin8が,シリア生殖を調節する新たなメカニズムを明らかにした.
- この経路は,シリアへの適切なタンパク質輸送に不可欠であり,その障害はBBSの病原化に寄与する可能性があります.
関連する概念動画
The Movement of Organelles and Vesicles
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
COP Coated Vesicles
Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of different...
Vesicular Tubular Clusters
After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
With the help of motor proteins such...
With the help of motor proteins such...
Transport Across the Golgi
While it is unclear how molecules move between adjacent Golgi cisternae, it is apparent that the molecules move from cis- cisterna, the entry face, to the trans- cisterna, the exit face. Experiments initially suggested vesicles that bud from one cisterna and fuse with the next cisterna to transport proteins between the cisternae. This vesicular transport model describes the Golgi apparatus as a relatively static structure with a unique enzyme composition in each cisterna. Molecules are...
Clathrin Coated Vesicles
Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
Vesicular Trasport: Endocytosis, Transcytosis and Exocytosis
Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis.
Endocytosis is a cellular mechanism that involves the inward folding of the cell membrane to create vesicles that capture and transport large drug molecules. This process comprises two distinct methods: pinocytosis (often referred to as "cell drinking") and phagocytosis (often referred to as "cell eating"). Pinocytosis is...
Endocytosis is a cellular mechanism that involves the inward folding of the cell membrane to create vesicles that capture and transport large drug molecules. This process comprises two distinct methods: pinocytosis (often referred to as "cell drinking") and phagocytosis (often referred to as "cell eating"). Pinocytosis is...


