Chen Lihong, Liu Changdong, Rui Feng, Zhu Guang
Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Biomol NMR Assign. 2011 Oct;5(2):211-4. doi: 10.1007/s12104-011-9302-9. Epub 2011 Apr 3.
Tensin is an important cytoplasmic phosphoprotein localized to integrin-mediated focal adhesion. It links actin cytoskeleton to extracellular matrix through its N-terminal actin-binding domain and C-terminal phosphotyrosine-binding domain. Studies of knockout mice revealed the critical roles of tensin in skeletal muscle regeneration, renal function and regulation of cell migration. The SH2 domain of tensin interacts with various tyrosine-phosphorylated proteins thus functions as a platform for dis/assembly of signaling molecules. It has also been implicated in recruiting a tumor supperssor protein DLC1 (deleted in live cancer 1) to the focal adhesion, which is required for oncogenic inhibition effect of DLC1 in a phosphotyrosine-independent manner. Here, we report complete chemical shift assignments of the SH2 domain of human tensin2 determined by triple resonance experiments. The resonance assignments serve as a basis for our further functional studies and structure determination by NMR spectroscopy. (BMRB deposits with accession number 16472).
张力蛋白是一种重要的细胞质磷蛋白,定位于整合素介导的粘着斑。它通过其N端肌动蛋白结合结构域和C端磷酸酪氨酸结合结构域将肌动蛋白细胞骨架与细胞外基质相连。对基因敲除小鼠的研究揭示了张力蛋白在骨骼肌再生、肾功能和细胞迁移调节中的关键作用。张力蛋白的SH2结构域与各种酪氨酸磷酸化蛋白相互作用,因此作为信号分子组装/拆卸的平台发挥作用。它还参与将肿瘤抑制蛋白DLC1(在肝癌1中缺失)募集到粘着斑,这是以磷酸酪氨酸非依赖方式实现DLC1致癌抑制作用所必需的。在此,我们报告了通过三重共振实验确定的人张力蛋白2的SH2结构域的完整化学位移归属。这些共振归属为我们进一步的功能研究和通过核磁共振光谱进行结构测定奠定了基础。(生物磁共振银行存档编号16472)