在存在键破解剂的情况下,肝脏糖原脆弱性
Xinle Tan1, Ziyi Wang2, Ut Cheung3
1Centre for Animal Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland 4072, Australia.
International journal of biological macromolecules
|April 22, 2024
概括
糖尿病肝脏糖原 糖尿病肝脏糖原
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 糖尿病研究 糖尿病研究
背景情况:
- 糖原储存葡萄糖,对血糖恒温至关重要.
- 糖原存在于由较小的β粒子组成的复合α粒子.
- 在糖尿病患者中观察到改变的糖原结构.
研究的目的:
- 为了研究健康小鼠和糖尿病小鼠之间肝脏糖原的结构差异.
- 探索结在糖原α粒子稳定性中的作用.
- 在糖尿病的小鼠模型中,在各种条件下比较糖原脆弱性.
主要方法:
- 从正常小鼠和db/db小鼠的肝糖原脆弱性的比较.
- 在不同温度下使用断剂 (DMSO,瓜尼丁,尿素) 处理.
- 使用中红外光谱学分析破坏的糖原.
主要成果:
- 糖尿病肝脏中的糖原α颗粒与健康对照组相比,显示二甲基硫氧化物 (DMSO) 的脆弱性增加.
- 观察到不同级别的α粒子破坏与各种键破解器.
- 中红外光谱学揭示了与破坏的糖原中的键相关的变化.
结论:
- 在α粒子内的β粒子之间的结合在健康和糖尿病肝糖原之间有所不同.
- 键可能在糖原α颗粒的结构完整性中起着重要作用.
- 这些发现表明,改变糖原结构和糖尿病之间存在潜在的联系.
相关概念视频
Hydrolysis
105.1K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
105.1K
Hydrogen Bonds
8.4K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
8.4K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K
IR Spectrum Peak Broadening: Hydrogen Bonding
969
The vibrational frequency of a bond is directly proportional to its bond strength. As a result, stronger bonds vibrate at higher frequencies, while weaker bonds vibrate at lower frequencies. The stretching vibration of the strong O–H bond in alcohols and phenols (very dilute solution or gas phase) appears as a sharp peak at 3600–3650 cm−1.
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular...
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular...
969
ATP Energy Storage and Release
9.4K
ATP is a highly unstable molecule. Unless quickly used to perform work, ATP spontaneously dissociates into ADP and inorganic phosphate (Pi), and the free energy released during this process is lost as heat. The energy released by ATP hydrolysis is used to perform work inside the cell and depends on a strategy called energy coupling. Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions, allowing them to proceed.
One example of energy coupling using ATP involves a...
One example of energy coupling using ATP involves a...
9.4K
Mass Spectrometry: Alcohol Fragmentation
3.5K
Alcohols (R-OH) ionize to lose one non-bonded electron from the oxygen atom, forming molecular ions. Due to their tendency to fragment rapidly, the intensity of the molecular ion peak in the mass spectrum is weak or sometimes absent. The fragmentation patterns for alcohols occur in two ways, i.e. ⍺-cleavage and dehydration. During ⍺-cleavage, the bond at the ⍺-position adjacent to the hydroxyl group cleaves to give a resonance-stabilized cation and a radical. However,...
3.5K


