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-Structure paper
| タイトル | Dynamic allostery drives autocrine and paracrine TGF-β signaling. |
|---|---|
| ジャーナル・号・ページ | Cell, Vol. 187, Issue 22, Page 6200-6219.e23, Year 2024 |
| 掲載日 | 2024年10月31日 |
著者 | Mingliang Jin / Robert I Seed / Guoqing Cai / Tiffany Shing / Li Wang / Saburo Ito / Anthony Cormier / Stephanie A Wankowicz / Jillian M Jespersen / Jody L Baron / Nicholas D Carey / Melody G Campbell / Zanlin Yu / Phu K Tang / Pilar Cossio / Weihua Wen / Jianlong Lou / James Marks / Stephen L Nishimura / Yifan Cheng / ![]() |
| PubMed 要旨 | TGF-β, essential for development and immunity, is expressed as a latent complex (L-TGF-β) non-covalently associated with its prodomain and presented on immune cell surfaces by covalent association ...TGF-β, essential for development and immunity, is expressed as a latent complex (L-TGF-β) non-covalently associated with its prodomain and presented on immune cell surfaces by covalent association with GARP. Binding to integrin αvβ8 activates L-TGF-β1/GARP. The dogma is that mature TGF-β must physically dissociate from L-TGF-β1 for signaling to occur. Our previous studies discovered that αvβ8-mediated TGF-β autocrine signaling can occur without TGF-β1 release from its latent form. Here, we show that mice engineered to express TGF-β1 that cannot release from L-TGF-β1 survive without early lethal tissue inflammation, unlike those with TGF-β1 deficiency. Combining cryogenic electron microscopy with cell-based assays, we reveal a dynamic allosteric mechanism of autocrine TGF-β1 signaling without release where αvβ8 binding redistributes the intrinsic flexibility of L-TGF-β1 to expose TGF-β1 to its receptors. Dynamic allostery explains the TGF-β3 latency/activation mechanism and why TGF-β3 functions distinctly from TGF-β1, suggesting that it broadly applies to other flexible cell surface receptor/ligand systems. |
リンク | Cell / PubMed:39288764 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.73 - 3.9 Å |
| 構造データ | EMDB-43489, PDB-8vs6: EMDB-43492, PDB-8vsb: EMDB-43493, PDB-8vsc: EMDB-43494, PDB-8vsd: ![]() EMDB-43495: avb8/L-TGF-b1/GARP focused on avb8 ![]() EMDB-43496: avb8/L-TGF-b1/GARP focused on L-TGF-b1/GARP ![]() EMDB-43876: Consensus map of avb8/L-TGF-b1/GARP complex |
| 化合物 | ![]() ChemComp-NAG: ![]() ChemComp-CA: ![]() ChemComp-MG: |
| 由来 |
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キーワード | SIGNALING PROTEIN / TGFb / Complex / Integrin |
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