概括
在FBJ小鼠骨髓瘤病毒 (FBJ-MuSV) 瘤基因v-fos产生蛋白质 (p55v-fos) 转化细胞. 病毒和细胞蛋白都存在于细胞核中,细胞形式经历了更多的修饰.
科学领域:
- 致癌病毒研究的研究.
- 细胞和分子生物学是细胞和分子生物学.
- 基因表达和蛋白质修饰的基因表达和蛋白质修饰.
背景情况:
- 已知FBJ小鼠骨髓瘤病毒 (FBJ-MuSV) 在小鼠中诱导骨髓瘤并转化纤维细胞.
- 该FBJ-MuSV瘤基因,v-fos,起源于细胞基因 (c-fos) 通过与辅助病毒重组.
- 该v-fos基因编码了一种55,000达尔顿的蛋白质,p55v-fos,它与细胞转化有关.
研究的目的:
- 为了研究v-fos蛋白 (p55v-fos) 和其细胞对应物c-fos的细胞定位和特征.
- 为了比较p55v-fos和p55c-fos的翻译后修饰和核水平.
- 了解蛋白在病毒瘤发生和细胞转化中的作用.
主要方法:
- 免疫光显微镜用于检测和定位细胞内的蛋白.
- 对感染FBJ-MuSV或通过表达v-fos或c-fos的复合体质粒转化细胞的分析.
- 生物化学分析以评估蛋白质修饰水平.
主要成果:
- 在具有放大v-fos基因的细胞核和病毒转化细胞中检测到p55v-fos蛋白.
- 细胞c-fos蛋白 (p55c-fos) 定位在正常小鼠羊膜细胞和表达c-fos基因的细胞的细胞核中.
- 与p55v-fos相比,p55c-fos在核中表现出更广泛的翻译后修饰.
- 正常细胞中p55c-fos的核度与转化纤维细胞中p55v-fos和p55c-fos的核度相当.
结论:
- 病毒 (v-fos) 和细胞 (c-fos) fos 蛋白都是核蛋白.
- 核中的c-fos的翻译后修饰比v-fos更复杂.
- 在正常和转化细胞中,蛋白的表达水平表明它在病毒转化之外的细胞过程中发挥了作用.
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