1YVJ

Crystal structure of the Jak3 kinase domain in complex with a staurosporine analogue

1YVJ の概要

• エントリーDOI: 10.2210/pdb1yvj/pdb
• 分子名称: Tyrosine-protein kinase JAK3, (2S,3S)-1,4-DIMERCAPTOBUTANE-2,3-DIOL, 1,2,3,4-TETRAHYDROGEN-STAUROSPORINE, ... (4 entities in total)
• 機能のキーワード: tyrosine kinase; scid; severe combined immunodeficiency; stat5; stat6; interleukin-2; common-gamma chain, transferase
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Endomembrane system; Peripheral membrane protein (By similarity): P52333
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 33981.97

構造登録者

Boggon, T.J.,Li, Y.,Manley, P.W.,Eck, M.J. (登録日: 2005-02-15, 公開日: 2005-05-24, 最終更新日: 2024-11-20)

主引用文献

Boggon, T.J.,Li, Y.,Manley, P.W.,Eck, M.J.
Crystal structure of the Jak3 kinase domain in complex with a staurosporine analog
Blood, 106:996-1002, 2005

PubMed Abstract: Jak (Janus kinase) family nonreceptor tyrosine kinases are central mediators of cytokine signaling. The Jak kinases exhibit distinct cytokine receptor association profiles and so transduce different signals. Jak3 expression is limited to the immune system, where it plays a key role in signal transduction from cytokine receptors containing the common gamma-chain, gammac. Patients unable to signal via gammac present with severe combined immunodeficiency (SCID). The finding that Jak3 mutations result in SCID has made it a target for development of lymphocyte-specific immunosuppressants. Here, we present the crystal structure of the Jak3 kinase domain in complex with staurosporine analog AFN941. The kinase domain is in the active conformation, with both activation loop tyrosine residues phosphorylated. The phosphate group on pTyr981 in the activation loop is in part coordinated by an arginine residue in the regulatory C-helix, suggesting a direct mechanism by which the active position of the C-helix is induced by phosphorylation of the activation loop. Such a direct coupling has not been previously observed in tyrosine kinases and may be unique to Jak kinases. The crystal structure provides a detailed view of the Jak3 active site and will facilitate computational and structure-directed approaches to development of Jak3-specific inhibitors.

PubMed: 15831699
DOI: 10.1182/blood-2005-02-0707

実験手法

X-RAY DIFFRACTION (2.55 Å)