一个分子内 (3 + 1) 人类端粒G-四重复的溶液结构,与端粒胺衍生物结合
Wan Jun Chung1, Brahim Heddi, Masayuki Tera
1School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore.
Journal of the American Chemical Society
|August 6, 2013
概括
研究人员揭示了第一个高分辨率结构的人类端粒G-四重复合体复杂与端粒胺衍生物. 这一发现推动了针对G-四重复结构的新型抗癌药物的开发.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 药用化学 医学化学
背景情况:
- 富含关氨酸的人类端粒DNA形成具有治疗潜力的G-四重复结构.
- 对于G-四重复-连接体复合体的现有结构数据是有限的,特别是对于非平行构造的结构.
- 泰洛梅斯塔丁是一种有前途的G-四方体向抗癌药物候选药物,但其复杂结构尚不清楚.
研究的目的:
- 为了确定一个分子内 (3+1) 人类端粒G-四重复合和端粒沙丁衍生物之间的复合物的高分辨率结构.
- 为了阐明G-四重复和新型联体之间的相互作用模式.
- 为设计拓特异性G-四方体向抗癌剂提供结构基础.
主要方法:
- 用X射线晶体学或NMR光谱学来确定高分辨率结构.
- 分子建模和对接研究,以分析联结体-G-四重复相互作用.
- 生物物理测定以确认结合和相互作用.
主要成果:
- 解决了第一个分子内 (3+1) 人类端粒G-四重复合的高分辨率结构,与端粒衍生物 (L2H2-6M(2) OTD) 复合.
- 连接体通过特定的π堆叠和静电相互作用与G-四重复相互作用.
- 该结构揭示了与G-四重复拓相关的独特结合模式.
结论:
- 这种结构的洞察力对于理解telomestatin衍生物与G-四重复合体的相互作用至关重要.
- 这些发现为合理设计新型,拓特异的G-四重复向抗癌药物提供了基础.
- 这项工作有助于开发更有效的癌症治疗方法.
相关概念视频
Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
RNA Structure
The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
RNA Structure
Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
Single-Strand DNA Binding Proteins
For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
Chromosome Structure
A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...


