ジャーナル: Cell / 年: 2021 タイトル: Simultaneous binding of Guidance Cues NET1 and RGM blocks extracellular NEO1 signaling. 著者: Ross A Robinson / Samuel C Griffiths / Lieke L van de Haar / Tomas Malinauskas / Eljo Y van Battum / Pavol Zelina / Rebekka A Schwab / Dimple Karia / Lina Malinauskaite / Sara Brignani / ...著者: Ross A Robinson / Samuel C Griffiths / Lieke L van de Haar / Tomas Malinauskas / Eljo Y van Battum / Pavol Zelina / Rebekka A Schwab / Dimple Karia / Lina Malinauskaite / Sara Brignani / Marleen H van den Munkhof / Özge Düdükcü / Anna A De Ruiter / Dianne M A Van den Heuvel / Benjamin Bishop / Jonathan Elegheert / A Radu Aricescu / R Jeroen Pasterkamp / Christian Siebold / 要旨: During cell migration or differentiation, cell surface receptors are simultaneously exposed to different ligands. However, it is often unclear how these extracellular signals are integrated. Neogenin ...During cell migration or differentiation, cell surface receptors are simultaneously exposed to different ligands. However, it is often unclear how these extracellular signals are integrated. Neogenin (NEO1) acts as an attractive guidance receptor when the Netrin-1 (NET1) ligand binds, but it mediates repulsion via repulsive guidance molecule (RGM) ligands. Here, we show that signal integration occurs through the formation of a ternary NEO1-NET1-RGM complex, which triggers reciprocal silencing of downstream signaling. Our NEO1-NET1-RGM structures reveal a "trimer-of-trimers" super-assembly, which exists in the cell membrane. Super-assembly formation results in inhibition of RGMA-NEO1-mediated growth cone collapse and RGMA- or NET1-NEO1-mediated neuron migration, by preventing formation of signaling-compatible RGM-NEO1 complexes and NET1-induced NEO1 ectodomain clustering. These results illustrate how simultaneous binding of ligands with opposing functions, to a single receptor, does not lead to competition for binding, but to formation of a super-complex that diminishes their functional outputs.
根拠: SAXS, Confirmed from Rg calculations of SAXS experiments with inline gel filtration. Also confirmed by sedimentation velocity AUC experiments and verified using interface mutants as negative controls.
タイプ
名称
対称操作
数
identity operation
1_555
x,y,z
1
Buried area
3210 Å2
ΔGint
-10 kcal/mol
Surface area
41320 Å2
単位格子
Length a, b, c (Å)
150.950, 49.600, 157.250
Angle α, β, γ (deg.)
90.000, 99.380, 90.000
Int Tables number
5
Space group name H-M
C121
-
要素
-
タンパク質 , 2種, 2分子 AB
#1: タンパク質
Netrin-1 / Epididymis tissue protein Li 131P
分子量: 49600.820 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Human Netrin-1 expressed in HEK293T cells using the pHLSEC vector for secreted proteins. Contains C-terminal Rho-1D4 tag. 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: NTN1, NTN1L / プラスミド: pHLsec / 細胞株 (発現宿主): HEK293T / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O95631
#2: タンパク質
Neogenin
分子量: 39268.199 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Mouse Neogenin FN domain 4-6 (isoform 2 - NP_001036217.1) expressed in HEK293T cells using the pHLSEC vector for secreted proteins. Contains C-terminal His6-tag 由来: (組換発現) Mus musculus (ハツカネズミ) / 遺伝子: Neo1 / プラスミド: pHLsec / 細胞株 (発現宿主): HEK293T / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q7TQG5