Novel human oncogene STK15/BTAK/Aurora 2

描述：（由申请人提供）我们克隆了一种新的人激酶 编码基因（STKI 5/BTAKaurora 2），位于染色体20 q13， 在许多不同的人肿瘤细胞类型中扩增/过表达（Sen等， Oncogene 14：2195-2200; Zhoui Kuang，Zhong，Kuo，Gray，Brinkley和Sen. Nature Genetics 20：189-193，1998）。该基因的过度表达诱导异常 中心体复制/分布、非整倍体与致瘤性转化 在哺乳动物细胞中。在约50例中检测到STK 15的过度表达， 原发性结肠肿瘤的百分比和在 大约12%的原发性乳腺肿瘤。在所有的目标中， 项目包括阐明STK 1 5通路，该通路参与维持 正常和癌细胞中基因组稳定性和非整倍体诱导 分别我们还建议评估的病理遗传意义， 人结肠癌细胞中的STK 1 5蛋白和STK 1 5相互作用蛋白。的 该项目的具体目标是：1。确定STK 1 5的相互作用 激酶及其潜在的调节因子和效应蛋白通过G2-M 细胞分裂周期的一个阶段。这些结果将有助于理解 这些相互作用在细胞的G2-M-后期进程中。 2.研究氨基酸结构要求和翻译后 a）STK 15亚细胞定位所需的修饰，包括 靶向中心体，和B）结合相互作用蛋白。结果将 有助于阐明调节STK 1 5定位的生化机制， 其功能相关性。 3.研究STK 15及其相互作用蛋白在肿瘤发生中的作用。 增殖过程中中心体功能和染色体稳定性的调节 通过与合适的野生型共转染实验， 和突变表达构建体。这些研究的结果预计将 阐明涉及STK 1 5在维持基因组稳定性中的途径， 以及激活导致细胞转化的变化， 基因表达异常升高 4.确定STK 15激酶的表达谱及其相互作用 不同组织学分级和分期的结肠癌标本中的蛋白质 有或没有染色体不稳定性表型。结果将有助于评估 STK 15通路在乳腺癌诊断和预后中的意义。

DESCRIPTION: (provided by applicant) We have cloned a novel human kinase encoding gene (STKI5/BTAKaurora2), harbored on chromosome 20q13 that is amplified/overexpressed in many different human tumor cell types (Sen et al, Oncogene 14:2195-2200; Zhoui Kuang, Zhong, Kuo, Gray, Brinkley and Sen. Nature Genetics 20:189-193, 1998). Over-expression of this gene induces abnormal centrosome duplication/distribution, aneuploidy and tumorigenic transformation in mammalian cells. Over expression of STK1 5 has been detected in about 50 percent of unselected primary colon tumors and gene amplification detected in about 12 percent of unselected primary breast tumors. Over all goals of this project include elucidating the STK1 5 pathway that is involved in maintaining genomic stability and induction of aneuploidy in normal and cancer cells respectively. We also propose to evaluate the patho-genetic significance of STK1 5 protein and STK1 5 interacting proteins in human colon cancer cells. The specific aims of this project are to: 1. Identify the interactions of STK1 5 kinase with its potential regulator and effector proteins through the G2-M phase of the cell division cycle. The results would help understand the role of these interactions in G2-M-Anaphase progression of cells. 2. Investigate amino acid structural requirements and post-translational modifications required for a) STK1 5 sub-cellular localization including targeting to centrosomes, and b) binding to interacting proteins. Results would help elucidate the biochemical mechanisms regulating STK1 5 localization and their functional relevance. 3. Investigate the role of STK1 5 and its interacting proteins in the regulation of centrosome function and chromosomal stability in proliferating cells in vivo through co-transfection experiments with appropriate wild type and mutant expression constructs. The findings of these studies are expected to elucidate the pathway that involves STK1 5 in maintaining genomic stability as well as in activating changes leading to transformation of cells due to abnormally elevated expression of the gene. 4. Determine the expression profiles of STK15 kinase and its interacting proteins in colon cancer specimens of different histological grades and stages with or without chromosomal instability phenotypes. Results would help assess the diagnostic and prognostic significance of STK1 5 pathway in this cancer.