5JXC

SynGAP Coiled-coil trimer

5JXC の概要

• エントリーDOI: 10.2210/pdb5jxc/pdb
• 関連するPDBエントリー: 5JXB
• 分子名称: Ras/Rap GTPase-activating protein SynGAP (2 entities in total)
• 機能のキーワード: syngap, coiled-coil, trimer, signaling protein
• 由来する生物種: Mus musculus (Mouse)
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 67473.65

構造登録者

Shang, Y.,Zhang, M. (登録日: 2016-05-13, 公開日: 2016-09-28, 最終更新日: 2024-03-20)

主引用文献

Zeng, M.,Shang, Y.,Araki, Y.,Guo, T.,Huganir, R.L.,Zhang, M.
Phase Transition in Postsynaptic Densities Underlies Formation of Synaptic Complexes and Synaptic Plasticity.
Cell, 166:1163-1175.e12, 2016

PubMed Abstract: Postsynaptic densities (PSDs) are membrane semi-enclosed, submicron protein-enriched cellular compartments beneath postsynaptic membranes, which constantly exchange their components with bulk aqueous cytoplasm in synaptic spines. Formation and activity-dependent modulation of PSDs is considered as one of the most basic molecular events governing synaptic plasticity in the nervous system. In this study, we discover that SynGAP, one of the most abundant PSD proteins and a Ras/Rap GTPase activator, forms a homo-trimer and binds to multiple copies of PSD-95. Binding of SynGAP to PSD-95 induces phase separation of the complex, forming highly concentrated liquid-like droplets reminiscent of the PSD. The multivalent nature of the SynGAP/PSD-95 complex is critical for the phase separation to occur and for proper activity-dependent SynGAP dispersions from the PSD. In addition to revealing a dynamic anchoring mechanism of SynGAP at the PSD, our results also suggest a model for phase-transition-mediated formation of PSD.

PubMed: 27565345
DOI: 10.1016/j.cell.2016.07.008

実験手法

X-RAY DIFFRACTION (2.5 Å)