関連する実験動画
Updated: Jan 8, 2026

06:45
Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
15.6K
IL-17受容体ヘテロテトラマーによって誘発されるACT1オリゴマー化の構造的基盤
Hui Zhang1, Xiao-Chen Bai2,3, Xuewu Zhang4,5
1Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nature communications
|December 15, 2025
まとめ
IL-17受容体(IL-17R)複合体の構造は、免疫シグナル伝達がどのように開始されるかを明らかにします。この研究は、免疫に不可欠なIL-17受容体(IL-17R)とACT1複合体形成の分子メカニズムを解明します。
科学分野:
- 免疫学;構造生物学;分子生物学
背景:
- インターロイキン17受容体(IL-17R)は、免疫および炎症反応の主要なメディエーターです。; IL-17Rシグナル伝達は、他のIL-17Rとのヘテロメリック複合体によって開始され、SEFIRドメイン相互作用を介してACT1をリクルートします。
研究 の 目的:
- IL-17受容体複合体形成とACT1リクルートメントの分子メカニズムを解明すること。; IL-17RA、IL-17RB、およびACT1複合体のクライオ電子顕微鏡構造を決定すること。
主な方法:
- 複合体構造を決定するためのクライオ電子顕微鏡(cryo-EM)。;構造モデルと機能的相互作用を検証するための変異解析。
主要な成果:
- IL-17RAとIL-17RBのSEFIRドメインは非対称ヘテロテトラマーを形成し、IL-17RAがACT1リクルートメントの基盤となります。; IL-17RBはIL-17RAダイマーを安定化させますが、ACT1とは直接相互作用しません。; IL-17RB、IL-17RA、およびACT1の二本鎖らせん集合体が形成され、IL-17RAのSEFEXドメインがACT1を固定します。
結論:
- この研究は、IL-17受容体-ACT1シグナルソーム形成の構造的基盤を明らかにします。;これにより、IL-17媒介免疫シグナル伝達を制御する分子メカニズムに関する重要な洞察が得られます。
関連する概念動画
T Cell Types and Functions
2.1K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
2.1K
Formation of Higher-order Actin Filaments
3.5K
The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
The high-order actin...
The high-order actin...
3.5K
Mechanism of Filopodia Formation
3.0K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
3.0K
Generation of Straight or Branched Actin Filaments
3.7K
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
3.7K
The JAK-STAT Signaling Pathway
11.8K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
11.8K
Intracellular Signaling Affects Focal Adhesions
3.4K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
3.4K

