STRUCTURE AND MECHANISM OF DNA INTERSTRAND CROSSLINKING

在核酸化学领域进行研究。 共价 将研究DNA链间交联剂的反应。 两个链间交联的化学结构，即 氮芥和高度简化的还原性类似物 活化的丝裂霉素C，将在原子分辨率下测定， 结构均匀、链间交联DNA的水解 包含这些交联的片段。 结果的结构 将通过与真实的、合成的、 预期结合物的样品。 丝裂霉素的作用机制 类似物优先交联DNA中的5 ′-CG序列， 研究使用合理设计的合成类似物，链间 其交联顺序优选将在以下条件下确定： 核苷酸分辨率。 双功能烷化剂有望在 优先交联碱基序列5 '-GC的机理基础 将进行合成和研究。 DNA链间交联剂 能够识别和交联DNA的六个碱基对序列 将进行设计和评估。

Research is proposed in the area of nucleic acid chemistry. Covalent reactions of DNA interstrand crosslinking agents will be investigated. The chemical structures of two interstrand crosslinks, those of a nitrogen mustard and of a highly simplified analog of reductively activated mitomycin C, will be determined at atomic resolution by hydrolysis of structurally homogeneous, interstrand crosslinked DNA fragments containing these crosslinks. The structures of the resulting conjugates will be identified by comparison to authentic, synthetic samples of the expected conjugates. The mechanism by which mitomycin analogs preferentially crosslink 5'-CG sequences in DNA will be investigated using rationally designed synthetic analogs, the interstrand crosslinking sequence preferences of which will be determined at nucleotide resolution. Bifunctional alkylating agents expected on mechanistic grounds to preferentially crosslink the base sequence 5'-GC will be synthesized and studied. DNA interstrand crosslinking agents capable of recognizing and crosslinking a six base pair sequence of DNA will be designed and evaluated.