National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R37AI051321
米国
Howard Hughes Medical Institute (HHMI)
米国
Ludwig Institute for Cancer Research (LICR)
米国
引用
ジャーナル: Science / 年: 2022 タイトル: Structure of a Janus kinase cytokine receptor complex reveals the basis for dimeric activation. 著者: Caleb R Glassman / Naotaka Tsutsumi / Robert A Saxton / Patrick J Lupardus / Kevin M Jude / K Christopher Garcia / 要旨: Cytokines signal through cell surface receptor dimers to initiate activation of intracellular Janus kinases (JAKs). We report the 3.6-angstrom-resolution cryo-electron microscopy structure of full- ...Cytokines signal through cell surface receptor dimers to initiate activation of intracellular Janus kinases (JAKs). We report the 3.6-angstrom-resolution cryo-electron microscopy structure of full-length JAK1 complexed with a cytokine receptor intracellular domain Box1 and Box2 regions captured as an activated homodimer bearing the valine→phenylalanine (VF) mutation prevalent in myeloproliferative neoplasms. The seven domains of JAK1 form an extended structural unit, the dimerization of which is mediated by close-packing of the pseudokinase (PK) domains from the monomeric subunits. The oncogenic VF mutation lies within the core of the JAK1 PK interdimer interface, enhancing packing complementarity to facilitate ligand-independent activation. The carboxy-terminal tyrosine kinase domains are poised for transactivation and to phosphorylate the receptor STAT (signal transducer and activator of transcription)-recruiting motifs projecting from the overhanging FERM (four-point-one, ezrin, radixin, moesin)-SH2 (Src homology 2)-domains. Mapping of constitutively active JAK mutants supports a two-step allosteric activation mechanism and reveals opportunities for selective therapeutic targeting of oncogenic JAK signaling.
全体 : GCN4-zippered dimeric IFN-lambda intracellular domain bound to tw...
全体
名称: GCN4-zippered dimeric IFN-lambda intracellular domain bound to two Jak1s
要素
複合体: GCN4-zippered dimeric IFN-lambda intracellular domain bound to two Jak1s
タンパク質・ペプチド: Tyrosine-protein kinase
タンパク質・ペプチド: Interferon lambda receptor 1
リガンド: ADENOSINE
リガンド: ADENOSINE-5'-DIPHOSPHATE
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超分子 #1: GCN4-zippered dimeric IFN-lambda intracellular domain bound to tw...
超分子
名称: GCN4-zippered dimeric IFN-lambda intracellular domain bound to two Jak1s タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 詳細: Co-expressed GST-fused GCN4-IFN-lambda and full-length Jak1 in T. ni. GST tagged was removed by 3C protease digestion.