Biotechnology and Biological Sciences Research Council (BBSRC)
英国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: Collagen VI microfibril structure reveals mechanism for molecular assembly and clustering of inherited pathogenic mutations. 著者: Alan R F Godwin / Mark H Becker / Rana Dajani / Matthew Snee / Alan M Roseman / Clair Baldock / 要旨: Collagen VI links the cell surface to the extracellular matrix to provide mechanical strength to most mammalian tissues, and is linked to human diseases including muscular dystrophy, fibrosis, ...Collagen VI links the cell surface to the extracellular matrix to provide mechanical strength to most mammalian tissues, and is linked to human diseases including muscular dystrophy, fibrosis, cardiovascular disease and osteoarthritis. Collagen VI assembles from heterotrimers of three different α-chains into microfibrils, but there are many gaps in our knowledge of the molecular assembly process. Here, we determine the structures of both heterotrimeric mini-collagen VI constructs and collagen VI microfibrils, from mammalian tissue, using cryogenic-electron microscopy. These structures reveal a cysteine-rich coiled coil region involved in trimerisation as well as microfibril assembly. Furthermore, our structures show that pathogenic mutations are located at interaction sites involved in different steps of collagen VI assembly, from the trimeric-coiled coil region that mediates heterotrimerisation, to clusters of mutations in the triple-helical region involved in microfibril formation. Our microfibril structure provides a template for understanding supramolecular assembly, and offers a platform for rationale design of therapeutics for collagen VI pathologies.
全体 : Subcomplex of Collagen 6 alpha 2 C2 domain with Collagen 6 alpha ...
全体
名称: Subcomplex of Collagen 6 alpha 2 C2 domain with Collagen 6 alpha 3 C1 and C2 domains, and the coiled coil formed from ALpha 1,2,3
要素
複合体: Subcomplex of Collagen 6 alpha 2 C2 domain with Collagen 6 alpha 3 C1 and C2 domains, and the coiled coil formed from ALpha 1,2,3
タンパク質・ペプチド: Collagen alpha-3(VI) chain
タンパク質・ペプチド: Collagen alpha-2(VI) chain
タンパク質・ペプチド: Collagen alpha-1(VI) chain
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
リガンド: water
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超分子 #1: Subcomplex of Collagen 6 alpha 2 C2 domain with Collagen 6 alpha ...
超分子
名称: Subcomplex of Collagen 6 alpha 2 C2 domain with Collagen 6 alpha 3 C1 and C2 domains, and the coiled coil formed from ALpha 1,2,3 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#3 詳細: C terminal regions of collagen 6 alpha 1,2,3 were expressed including some collagenous region, the coiled-coil region and the C1 and C2 von willebrand domains. Alpha 2 C2, alpha 3 C1,C2 and ...詳細: C terminal regions of collagen 6 alpha 1,2,3 were expressed including some collagenous region, the coiled-coil region and the C1 and C2 von willebrand domains. Alpha 2 C2, alpha 3 C1,C2 and the coiled coil are resolved as a globular subcomplex with the other domains observed as flexible without the constraining effect of the full microfibril.