関連する実験動画
Updated: Dec 14, 2025

10:27
Measuring Trans-Plasma Membrane Electron Transport by C2C12 Myotubes
Published on: May 4, 2018
7.2K
相互作用 エピディチオジケトピペラジン の ディスルファイド 還元 力を調節する
Henry R Kilgore1, Chase R Olsson1, Kyan A D'Angelo1
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|July 24, 2020
まとめ
エピチオジケトピペラジン (ETP) は強力な抗癌化合物で,独特の二硫化結合を特徴としています. この絆は
科学分野:
- 自然製品化学
- 薬剤化学
- 構造生物学
背景:
- エピチオジケトピペラジン (ETP) は,重要な抗がん性を持つ真菌の天然産物です.
- ETPは,高エネルギー,エクリプスされた二硫化結合によって橋渡しされたディケトピペラジンコアを持っています.
研究 の 目的:
- ETP の非典型的二硫化結合の物理化学的性質を調査する.
- このユニークな構造の安定化メカニズムと生物学的意味を理解する.
主な方法:
- 電子相互作用を分析するための計算モデルです.
- 合成化学で ETP アナログを作り 研究する
- ディスルファイド結合の性質を特徴付けるスペクトロスコピック技術.
主要な成果:
- ETP の二硫化結合は,2 つの n→π* 相互作用によって著しく安定する.
- これらの相互作用は,二酸化炭素結合に相当なエネルギー (3−5 kcal/mol) を供給する.
- 安定した二硫化結合は,生理学的条件下での減少に対する抵抗性を増す.
結論:
- n→π*相互作用は,二硫化物結合の安定化のための新しいメカニズムを提供します.
- ETPの二酸化炭素結合の安定性は,その生物学的活動に影響する.
- この発見は 安定性や薬剤開発のための 分子設計の洞察を 提供しています
さらに関連する動画
関連する概念動画
Protein Modifications in the RER
6.5K
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
6.5K
Radical Reactivity: Steric Effects
2.3K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
Along with electronic...
2.3K
Phase I Reactions: Reductive Reactions
444
Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
444
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
855
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
855
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
1.6K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.6K
Phosphoinositides and PIPs
9.9K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
9.9K

