C-MYC PHOSPHORYLATION AND GROWTH RELATED KINASES

核原癌基因c-myc被认为参与了 调节细胞增殖。 c-myc调节异常 与细胞的转化有关 尽管进行了广泛 尽管对c-myc mRNA水平的调节进行了研究，但知之甚少 关于c-myc蛋白质。 这项研究将扩大我们的知识 关于蛋白质。 它将强调后翻译研究 修饰，特别是磷酸化。 生化和 将使用遗传学方法来研究c-myc的作用。 蛋白质在细胞增殖的调节。 基于凝胶的酶促和化学切割技术将是 用于分析c-myc磷酸化模式， 生长条件 特异性磷酸化位点将被 通过肽分析、高压电泳、 在旋转杯中水解氨基酸和序列分析 测序仪 将产生针对c- myc/bets-galactosidase融合蛋白，用于免疫 沉淀天然和变性蛋白质。 c-myc的位点特异性突变体将使用 寡核苷酸定向诱变。 这些变种人将会 测试功能和生物学特性。 这项研究还将研究其他癌基因的影响，如 多瘤T抗原对c-myc磷酸化的影响。 多瘤 缺乏刺激宿主细胞DNA合成的突变体 将产生并测试它们对细胞生长的影响 相关激酶和c-myc磷酸化。

The nuclear proto-oncogene c-myc is thought to be involved in regulation of cell proliferation. Abnormal regulation of c-myc has been implicated in transformation of cells. Despite extensive work on the regulation of c-myc mRNA levels, little is known about the c-myc protein. This study will expand our knowledge about the protein. It will emphasize studies on post-translation modifications, particularly phosphorylation. Biochemical and genetic approaches will be used to examine the role of c-myc protein in the regulation of cellular proliferation. Gel-based enzymatic and chemical cleavage techniques will be used to analyze c-myc phosphorylation patterns under a number of growth condition. Specific phosphorylation sites will be determined by peptide analysis, high voltage electrophoresis of hydrolyzed amino acids and sequence analysis in a spinning cup sequenator. Polyclonal antibodies will be generated against a c- myc/bets-galactosidase fusion protein and used to immuno- precipitate native and denatured protein. Site specific mutants of c-myc will be constructed using oligonucleotide directed mutagenesis. These mutants will be tested for functional and biological properties. This study will also examine the effects of other oncogenes such as the polyoma T antigens on c-myc phosphorylation. Polyoma mutants defective for the stimulation of host cell DNA synthesis will be generated and tested for their effects on cellular growth related kinases and c-myc phosphorylation.