4GZ8

Mouse Semaphorin 3A, domains Sema-PSI-IG

4GZ8 の概要

• エントリーDOI: 10.2210/pdb4gz8/pdb
• 分子名称: Semaphorin-3A, alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (7 entities in total)
• 機能のキーワード: sema, multi-domain, cell-cell signaling, plexin, glycosilated, extracellular, signaling protein
• 由来する生物種: Mus musculus (mouse)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 147293.61

構造登録者

Janssen, B.J.C.,Malinauskas, T.,Siebold, C.,Jones, E.Y. (登録日: 2012-09-06, 公開日: 2012-10-17, 最終更新日: 2024-10-16)

主引用文献

Janssen, B.J.C.,Malinauskas, T.,Weir, G.A.,Cader, M.Z.,Siebold, C.,Jones, E.Y.
Neuropilins lock secreted semaphorins onto plexins in a ternary signaling complex.
Nat.Struct.Mol.Biol., 19:1293-1299, 2012

PubMed Abstract: Co-receptors add complexity to cell-cell signaling systems. The secreted semaphorin 3s (Sema3s) require a co-receptor, neuropilin (Nrp), to signal through plexin As (PlxnAs) in functions ranging from axon guidance to bone homeostasis, but the role of the co-receptor is obscure. Here we present the low-resolution crystal structure of a mouse semaphorin-plexin-Nrp complex alongside unliganded component structures. Dimeric semaphorin, two copies of plexin and two copies of Nrp are arranged as a dimer of heterotrimers. In each heterotrimer subcomplex, semaphorin contacts plexin, similar to in co-receptor-independent signaling complexes. The Nrp1s cross brace the assembly, bridging between sema domains of the Sema3A and PlxnA2 subunits from the two heterotrimers. Biophysical and cellular analyses confirm that this Nrp binding mode stabilizes a canonical, but weakened, Sema3-PlxnA interaction, adding co-receptor control over the mechanism by which receptor dimerization and/or oligomerization triggers signaling.

PubMed: 23104057
DOI: 10.1038/nsmb.2416

実験手法

X-RAY DIFFRACTION (3.3 Å)