6OXL

CRYO-EM STRUCTURE OF PHOSPHORYLATED AP-2 (mu E302K) BOUND TO NECAP IN THE PRESENCE OF SS DNA

6OXL の概要

• エントリーDOI: 10.2210/pdb6oxl/pdb
• 関連するPDBエントリー: 6OWO
• EMDBエントリー: 20215 20220
• 分子名称: AP-2 complex subunit alpha-2, AP-2 complex subunit beta, AP-2 complex subunit mu, ... (6 entities in total)
• 機能のキーワード: ap2, necap2 protein, cytoplasmic vesicle, endocytosis, lipid-binding, adaptor, membrane, transport, phosphorylation
• 由来する生物種: Mus musculus (Mouse); 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 232698.56

構造登録者

Partlow, E.A.,Baker, R.W.,Beacham, G.M.,Chappie, J.,Leschziner, A.E.,Hollopeter, G. (登録日: 2019-05-13, 公開日: 2019-09-11, 最終更新日: 2024-10-16)

主引用文献

Partlow, E.A.,Baker, R.W.,Beacham, G.M.,Chappie, J.S.,Leschziner, A.E.,Hollopeter, G.
A structural mechanism for phosphorylation-dependent inactivation of the AP2 complex.
Elife, 8:-, 2019

PubMed Abstract: Endocytosis of transmembrane proteins is orchestrated by the AP2 clathrin adaptor complex. AP2 dwells in a closed, inactive state in the cytosol, but adopts an open, active conformation on the plasma membrane. Membrane-activated complexes are also phosphorylated, but the significance of this mark is debated. We recently proposed that NECAP negatively regulates AP2 by binding open and phosphorylated complexes (Beacham et al., 2018). Here, we report high-resolution cryo-EM structures of NECAP bound to phosphorylated AP2. The site of AP2 phosphorylation is directly coordinated by residues of the NECAP PHear domain that are predicted from genetic screens in . Using membrane mimetics to generate conformationally open AP2, we find that a second domain of NECAP binds these complexes and cryo-EM reveals both domains of NECAP engaging closed, inactive AP2. Assays in vitro and in vivo confirm these domains cooperate to inactivate AP2. We propose that phosphorylation marks adaptors for inactivation.

PubMed: 31464684
DOI: 10.7554/eLife.50003

実験手法

ELECTRON MICROSCOPY (3.5 Å)