4EKK

Akt1 with AMP-PNP

4EKK の概要

• エントリーDOI: 10.2210/pdb4ekk/pdb
• 関連するPDBエントリー: 4EKL
• 分子名称: RAC-alpha serine/threonine-protein kinase, Glycogen synthase kinase-3 beta, PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER, ... (5 entities in total)
• 機能のキーワード: phosphotransferase, transferase
• 由来する生物種: Homo sapiens (human); 詳細
• 細胞内の位置: Cytoplasm: P31749 P49841
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 82412.52

構造登録者

Wu, W.-I.,Vigers, G.P.A.,Morales, T.H.,Brandhuber, B.J. (登録日: 2012-04-09, 公開日: 2012-05-23, 最終更新日: 2024-10-09)

主引用文献

Lin, K.,Lin, J.,Wu, W.I.,Ballard, J.,Lee, B.B.,Gloor, S.L.,Vigers, G.P.,Morales, T.H.,Friedman, L.S.,Skelton, N.,Brandhuber, B.J.
An ATP-Site On-Off Switch That Restricts Phosphatase Accessibility of Akt.
Sci.Signal., 5:ra37-ra37, 2012

PubMed Abstract: The protein serine-threonine kinase Akt undergoes a substantial conformational change upon activation, which is induced by the phosphorylation of two critical regulatory residues, threonine 308 and serine 473. Paradoxically, treating cells with adenosine 5'-triphosphate (ATP)-competitive inhibitors of Akt results in increased phosphorylation of both residues. We show that binding of ATP-competitive inhibitors stabilized a conformation in which both phosphorylated sites were inaccessible to phosphatases. ATP binding also produced this protection of the phosphorylated sites, whereas interaction with its hydrolysis product adenosine 5'-diphosphate (ADP) or allosteric Akt inhibitors resulted in increased accessibility of these phosphorylated residues. ATP-competitive inhibitors mimicked ATP by targeting active Akt. Forms of Akt activated by an oncogenic mutation or myristoylation were more potently inhibited by the ATP-competitive inhibitors than was wild-type Akt. These data support a new model of kinase regulation, wherein nucleotides modulate an on-off switch in Akt through conformational changes, which is disrupted by ATP-competitive inhibitors.

PubMed: 22569334
DOI: 10.1126/scisignal.2002618

実験手法

X-RAY DIFFRACTION (2.8 Å)