鉴定PARP1与c-KIT1 G四重复基因组结合的特征:深入了解域特定相互作用
Dagur Hanuman Singh1, Waghela Deeksha1, Eerappa Rajakumara1
1Macromolecular Structural Biology Lab, Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502284, India.
Biophysical chemistry
|September 29, 2024
概括
聚 ((ADP-ribose) 聚合酶1 (PARP1) 通过特定的域绑定G-四重复DNA. PARP1 识别了修改后的 DNA 基,帮助 DNA 修复和基因组稳定.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 基因组学就是基因组学.
背景情况:
- 聚基聚合酶1 (PARP1) 是一个关键的核酶.
- PARP1参与DNA损伤修复,细胞循环调节和基因组稳定.
- PARP1与各种DNA结构相互作用,包括DNA断裂.
研究的目的:
- 在生物化学和生物物理上描述PARP1与G-四重复DNA (G4-DNA) 的结合.
- 为了确定参与G4-DNA识别的关键PARP1域.
- 研究DNA基氧化对PARP1-G4-DNA相互作用的影响.
主要方法:
- 生物化学测定 生物化学测定
- 生物物理特性表征
- 对DNA结合的研究.
主要成果:
- 在ZnF1,ZnF3和WGR域中介于PARP1与G4-c-KIT1DNA的结合.
- 这些域显示出对G4-c-KIT1.1的合作绑定.
- 无论基氧化 (G4-5caC-cKIT1) 是否发生,PARP1都能识别G4-c-KIT1.
- G4-c-KIT1和G4-5caC-cKIT1都刺激了PARP1的催化活性.
结论:
- 不管基因的修饰如何,PARP1都表现出对G4-c-KIT1的多功能DNA结合.
- 域特异性相互作用对于PARP1的G4-DNA识别和催化是至关重要的.
- 这增强了对PARP1在DNA修复和基因组维护中的作用的理解.
相关概念视频
Cooperative Binding of Transcription Regulators
6.4K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
6.4K
Single-Strand DNA Binding Proteins
14.0K
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...
14.0K
Assembly of Signaling Complexes
5.7K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
5.7K
Covalently Linked Protein Regulators
6.8K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
6.8K


