【24h】

In Process Citation

机译:过程中引用

获取原文
获取原文并翻译 | 示例
           

摘要

The full length, positive-strand genome of the Moloney Murine Leukemia Virus contains a "core encapsidation signal" that is essential for efficient genome packaging during virus assembly. We have determined the structure of a 101-nucleotide RNA that contains this signal (called mPsi) using a novel isotope-edited NMR approach. The method is robust and should be generally applicable to larger RNAs. mPsi folds into three stem loops, two of which (SL-C and SL-D) co-stack to form an extended helix. The third stem loop (SL-B) is connected to SL-C by a flexible, four-nucleotide linker. The structure contains five mismatched base-pairs, an unusual C.CG base-triple platform, and a novel "A-minor K-turn," in which unpaired adenosine bases A340 and A341 of a GGAA bulge pack in the minor groove of a proximal stem, and a bulged distal uridine (U319) forms a hydrogen bond with the phosphodiester of A341. Phylogenetic analyses indicate that these essential structural elements are conserved among the murine C-type retroviruses.
机译:莫洛尼鼠白血病病毒的全长正链基因组包含一个“核心衣壳化信号”,这对于病毒组装过程中有效的基因组包装至关重要。我们已经使用新型同位素编辑的NMR方法确定了包含此信号的101个核苷酸RNA的结构(称为mPsi)。该方法是鲁棒的,应普遍适用于较大的RNA。 mPsi折叠成三个茎环,其中两个(SL-C和SL-D)共同堆叠以形成扩展的螺旋。第三茎环(SL-B)通过柔性的四核苷酸接头与SL-C连接。该结构包含五个错配的碱基对,一个不寻常的C.CG碱基三重平台和一个新颖的“ A-minor K-turn”,其中GGAA凸起的未配对腺苷碱基A340和A341包裹在一个小沟中。近端茎和一个凸起的远端尿苷(U319)与A341的磷酸二酯形成氢键。系统发育分析表明,这些必需的结构元件在鼠类C型逆转录病毒中是保守的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号