ジャーナル: Nat Commun / 年: 2018 タイトル: Structures of Teneurin adhesion receptors reveal an ancient fold for cell-cell interaction. 著者: Verity A Jackson / Dimphna H Meijer / Maria Carrasquero / Laura S van Bezouwen / Edward D Lowe / Colin Kleanthous / Bert J C Janssen / Elena Seiradake / 要旨: Teneurins are ancient cell-cell adhesion receptors that are vital for brain development and synapse organisation. They originated in early metazoan evolution through a horizontal gene transfer event ...Teneurins are ancient cell-cell adhesion receptors that are vital for brain development and synapse organisation. They originated in early metazoan evolution through a horizontal gene transfer event when a bacterial YD-repeat toxin fused to a eukaryotic receptor. We present X-ray crystallography and cryo-EM structures of two Teneurins, revealing a ~200 kDa extracellular super-fold in which eight sub-domains form an intricate structure centred on a spiralling YD-repeat shell. An alternatively spliced loop, which is implicated in homophilic Teneurin interaction and specificity, is exposed and thus poised for interaction. The N-terminal side of the shell is 'plugged' via a fibronectin-plug domain combination, which defines a new class of YD proteins. Unexpectedly, we find that these proteins are widespread amongst modern bacteria, suggesting early metazoan receptor evolution from a distinct class of proteins, which today includes both bacterial proteins and eukaryotic Teneurins.
Accession code: 6FB3 詳細: We have used PDB 6FB3 (same publication) as a template model using Modeller v9.16 followed by manual rebuilding in Coot and real-space refinement using Phenix. Source name: PDB / タイプ: experimental model