ジャーナル: Nat Commun / 年: 2017 タイトル: Structural and functional dissection of the DH and PH domains of oncogenic Bcr-Abl tyrosine kinase. 著者: Sina Reckel / Charlotte Gehin / Delphine Tardivon / Sandrine Georgeon / Tim Kükenshöner / Frank Löhr / Akiko Koide / Lena Buchner / Alejandro Panjkovich / Aline Reynaud / Sara Pinho / ...著者: Sina Reckel / Charlotte Gehin / Delphine Tardivon / Sandrine Georgeon / Tim Kükenshöner / Frank Löhr / Akiko Koide / Lena Buchner / Alejandro Panjkovich / Aline Reynaud / Sara Pinho / Barbara Gerig / Dmitri Svergun / Florence Pojer / Peter Güntert / Volker Dötsch / Shohei Koide / Anne-Claude Gavin / Oliver Hantschel / 要旨: The two isoforms of the Bcr-Abl tyrosine kinase, p210 and p190, are associated with different leukemias and have a dramatically different signaling network, despite similar kinase activity. To ...The two isoforms of the Bcr-Abl tyrosine kinase, p210 and p190, are associated with different leukemias and have a dramatically different signaling network, despite similar kinase activity. To provide a molecular rationale for these observations, we study the Dbl-homology (DH) and Pleckstrin-homology (PH) domains of Bcr-Abl p210, which constitute the only structural differences to p190. Here we report high-resolution structures of the DH and PH domains and characterize conformations of the DH-PH unit in solution. Our structural and functional analyses show no evidence that the DH domain acts as a guanine nucleotide exchange factor, whereas the PH domain binds to various phosphatidylinositol-phosphates. PH-domain mutants alter subcellular localization and result in decreased interactions with p210-selective interaction partners. Hence, the PH domain, but not the DH domain, plays an important role in the formation of the differential p210 and p190 Bcr-Abl signaling networks.
設備名称: PETRA III P12 / 地域: Hamburg / 国: Germany / 線源: X-ray synchrotron / 波長: 0.124 Å / スペクトロメータ・検出器間距離: 3 mm
検出器
名称: Pilatus 2M
スキャン
タイトル: PH - Pleckstrin-homology domain of Bcr-Abl tyrosine kinase p210 測定日: 2016年11月10日 / 保管温度: 10 °C / セル温度: 10 °C / 照射時間: 0.045 sec. / フレーム数: 20 / 単位: 1/A /
Min
Max
Q
0.0021
0.379
距離分布関数 P(R)
ソフトウェア P(R): GNOM 5.0 / ポイント数: 1500 /
Min
Max
Q
0.0071425
0.319587
P(R) point
1
1500
R
0
67
結果
カーブのタイプ: merged コメント: The homology model is derived from PDB ID: 2z0q. The PDB entry for BCR-ABL p210 fusion protein PH domain is 5oc7 (has an internal deletion).