PI3 Kinase Class III (phospho-

Measurement of Phosphoinositide 3-Kinase Activity

adaptor molecule ( 1 ). The class II PI 3-kinases are characterized by the presence of a C-2 domain at the carboxy terminus and utilize predominantly PtdIns and PtdIns(4)P as substrates (e.g., PI3K-C2α), whereas the class III PI 3-kinases utilize

v468. chapter 4 WNT 细胞通路 检测细胞GSK3活性与表达水平

occurs downstream of growth factor and phosphatidylinositol3 kinase (PI3K) signalling. Activation of the canonicalWnt pathway also inhibits GSK3 activity, although this is notmediated by N-terminal phosphorylation but by protein–proteininteractions (9 –

细胞自噬系统介绍

/MTOR 激活类 1）Class III PI3K 结构上类似于Class I PI3K，但作用相反。 接受上述信号的自噬蛋白： 目前都把焦点集中在beclin 1（酵母同源物为atg6），能与多种蛋白结合，如Vps34（Class III PI3K的催化亚单位），mTOR，BCL-2和BCLXL蛋白等，更多介绍请参阅OMIM：http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=604378。