相关实验视频
Updated: Jul 16, 2026
15:22
Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
Published on: April 3, 2014
在DNA中有效地纳入一个铜基基对
Kentaro Tanaka1, Atsushi Tengeiji, Tatsuhisa Kato
1Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|October 17, 2002
概括
研究人员使用铜离子合成了一个新的DNA基对,创造了一个稳定的人工DNA结构. 这种金属基对为DNA复合体提供了增强的热稳定性.
科学领域:
- 合成有机化学 合成有机化学
- 生物化学 生物化学
- 材料科学是一种材料科学.
背景情况:
- 人工核酸使得新的DNA基配对策略成为可能.
- 金属复合提供了一条通往DNA中中性基对的途径.
研究的目的:
- 为了合成含有氧二的核酸.
- 将一个中性铜 (II) 介导的酸基对 (H-Cu-H) 纳入DNA复合体.
- 为了评估修改后的DNA复合体的热稳定性和结构性质.
主要方法:
- 核酸合成和DNA结合.
- 紫外线-Vis光谱检测基因配对和热变性.
- 电子磁共振 (EPR) 和循环二元化 (CD) 研究用于结构分析.
主要成果:
- 一种含有氧皮的核酸被成功合成并纳入一个15-mer DNA复合体.
- H-Cu-H金属基对显著增强双重热稳定性相比,在同等质Cu的存在下,A-T基对显著增强了双重热稳定性 ((2+).
- 谱学研究证实了双重体内Cu2+介导的基对的固态度形成,并建议将其集成到右侧螺旋结构中.
结论:
- 一个中性,铜 (II) 介导的基基对可以稳定地纳入DNA复合体,从而产生显著的热稳定.
- 这种金属基配对策略为设计DNA提供了基础,在螺旋轴上控制中性金属基对的间距.
相关概念视频
01:43Proofreading
Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
02:27DNA Base Pairing
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
02:27DNA Base Pairing
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
01:54Base Excision Repair
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
The first step of...
01:02Long-patch Base Excision Repair
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
02:27Base-pairing and DNA Repair
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,