Gln-carba-ADPr-peptide的合成和宏域结合
Sander B Engelsma1, Aurelio Pio Nardozza2, Pieter de Saint Aulaire1
1Gorlaeus Laboratories, Leiden Institute of Chemistry, Faculty of Science, Einsteinweg 55, 2333 CC, Leiden, the Netherlands.
Chembiochem : a European journal of chemical biology
|March 5, 2024
概括
研究人员在谷氨酸上开发了一种稳定的模仿单-ADP-ribosylation,这是一个关键的翻译后修改,涉及到细胞信号传递. 这种carba-ADP-ribosylated可以对这种动态修饰进行关键的结构和生化研究.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 翻译后修改 翻译后修改
背景情况:
- 单-ADP-ribosylation是一个关键的翻译后修饰 (PTM) 调节细胞信号通路.
- ADP-ribosylated谷氨酸残留物是常见的修饰点,但不稳定,阻碍研究.
- 稳定模仿对这种修饰的详细结构和生化研究至关重要.
研究的目的:
- 为了合成ADP-ribosylated谷氨酸 (Glu-ADPr) 的稳定模仿生物化学和结构研究.
- 为了创建一个模仿素H2BN-终端尾部的carba-ADP-ribosylated.
- 为了评估这种模仿物与相关蛋白质域的结合.
主要方法:
- 使用一种新型的环丁醇 - 利博诺基基衍生物合成一个carba-ADP-ribosylated的固相合成.
- 制备一个5'-phosphoribosylatedFmoc-glutamine前体.
- 异热定位热度计 (ITC) 用于评估结合相互作用.
主要成果:
- 成功合成了基因组H2B的卡巴-ADP-ribosylated模仿.
- 证明了人类的MacroD2和TARG1宏基因与carba-ADPr-结合.
- 结合亲和力和结合方式与原生ADP-ribosylated类可比.
结论:
- 合成的卡巴-ADP-ribosylated作为一个稳定和有效的模仿研究Glu-ADPr.
- 这种模仿可促进宏基因与ADP-ribosylated的相互作用的结构和生化分析.
- 这些发现为了解单-ADP-ribosylation的生物学作用提供了有价值的工具.
相关概念视频
Assembly of Signaling Complexes
5.8K
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,...
5.8K
GPCRs Regulate Adenylyl Cylase Activity
5.5K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.5K
Peptide Bonds
74.4K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
74.4K
ATP and Macromolecule Synthesis
5.6K
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
5.6K
IP3/DAG Signaling Pathway
12.1K
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
12.1K
Conservation of Protein Domains Over Different Proteins
10.9K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.9K


