In accordance with the invention, a novel gene translocation, (4p15, 6q22), in human non-small cell lung carcinoma (NSCLC) that results in a fusion proteins combining part of Sodium-dependent Phosphate Transporter Isoform NaPi-3b protein (SLC34A2) with Proto- oncogene Tyrosine Protein Kinase ROS Precursor (ROS) kinase has now been identified. The SLC34A2-ROS fusion protein is anticipated to drive the proliferation and survival of a subgroup of NSCLC tumors. The invention therefore provides, in part, isolated polynucleotides and vectors encoding the disclosed mutant ROS kinase polypeptides, probes for detecting it, isolated mutant polypeptides, recombinant polypeptides, and reagents for detecting the fusion and truncated polypeptides. The disclosed identification of the new fusion protein enables new methods for determining the presence of these mutant ROS kinase polypeptides in a biological sample, methods for screening for compounds that inhibit the proteins, and methods for inhibiting the progression of a cancer characterized by the mutant polynucleotides or polypeptides, which are also provided by the invention.
根据本发明,在人类非小细胞肺癌(NSCLC)中发现了一种新的
基因易位(4p15,6q22),这种易位导致了一种融合蛋白,它结合了部分依赖
钠的
磷酸盐转运体异构体 NaPi-3b 蛋白(SLC34A2)和原癌
基因酪氨酸蛋白激酶 ROS 前体(ROS)激酶。预计 SLC34A2-ROS 融合蛋白将推动 NSCLC 肿瘤亚群的增殖和存活。因此,本发明部分提供了编码所公开的突变 ROS 激酶
多肽的分离多核苷酸和载体、用于检测它的探针、分离的突变
多肽、
重组多肽以及用于检测融合
多肽和截短
多肽的试剂。本发明还提供了用于确定
生物样本中是否存在这些突变 ROS 激酶
多肽的新方法、用于筛选抑制这些蛋白质的化合物的方法以及用于抑制以突变多核苷酸或
多肽为特征的癌症进展的方法。