Results 71 to 80 of about 764,898 (194)

Oxidation of Benzoyl Methionine to Benzoyl Methionine Sulfoxide with 3-Hydroperoxyindolenines

Chemical and Pharmaceutical Bulletin, 1972
Benzoyl methionine (4), its methyl ester (9), and methionine have been oxidized with 3-hydroperoxyindolenines (3a and 7) to the corresponding sulfoxides (5, 10, and methionine sulfoxide).
NAKAGAWA, MASAKO, SUZUKI, TOSHIHIKO, KAWASHIMA, TSUNEO, HINO, TOHRU   +3 more
openaire   +2 more sources

Ammonification Process Is Limited by Transformation of Medium Molecular Weight Nitrogenous Organics but Not Hydrolysis of Proteins

Advanced Science, EarlyView.
A multi‐level analytical framework, integrating protein‐level persistence analysis, nontargeted HRMS formula tracking, peptide‐level proteomics, and targeted monomer quantification under varying redox conditions, together with FMO calculations reveal that ammonification is limited by medium molecular weight nitrogenous multimers.
Jing Li, Junjie Qiu, Fan Lü, Hua Zhang, Pinjing He   +4 more
wiley   +1 more source

Protein methionine sulfoxide dynamics in Arabidopsis thaliana under oxidative stress [PDF]

, 2015
Reactive oxygen species such as hydrogen peroxide can modify proteins via direct oxidation of their sulfur-containing amino acids, cysteine and methionine.
Ghesquière, Bart, Jacques, Silke, Demol, Hans, De Bock, Pieter-Jan, Van Breusegem, Frank, Willems, Patrick, Messens, Joris, Gevaert, Kris, Wahni, Khadija, Silke Jacques   +9 more
core   +1 more source

Predicting Enzyme Turnover Numbers and Enabling Rational Enzyme Evolution

Advanced Science, EarlyView.
MCKcat, a deep learning framework combining multi‐scale convolution and cross‐attention, accurately predicts enzyme turnover number (kcat) by fusing sequence and reaction representations. It couples with rational design in a two‐step strategy for Bacillus aryabhattai laccase engineering, achieving a 75% positive rate with synergistically enhanced ...
Fengya Ge, Xiangyang Ma, Jiyan Li, Mengxiang Wang, Fuping Lu, Yihan Liu, Lin Wang   +6 more
wiley   +1 more source

Susceptibility of Protein Methionine Oxidation in Response to Hydrogen Peroxide Treatment–Ex Vivo Versus In Vitro: A Computational Insight

, 2020
Methionine oxidation plays a relevant role in cell signaling. Recently, we built a database containing thousands of proteins identified as sulfoxidation targets.
Juan C. Aledo, Pablo Aledo
core   +1 more source

Dual Repression by IPA1 Fine‐Tunes OsbZIP79‐Mediated Salt Tolerance in Rice

Advanced Science, EarlyView.
Dual repression by IPA1 fine‐tunes OsbZIP79‐mediated salt tolerance in rice: direct transcriptional inhibition under normal conditions and salt‐induced degradation under stress. This dual mechanism activates OsbZIP79 to regulate Na+/K+ homeostasis and redox balance via downstream genes, enabling optimal salt stress response.
Hui Wang, Bo Liu, Can Hu, Chenfan Zheng, Yuting Wei, Xier Xu, Wei Yang, Yu Fang, Guangle Shen, Pedro García‐Caparros, Conghe Zhang, Qingyao Shu, Meng Jiang   +12 more
wiley   +1 more source

Temporal Trajectories of the Tau Aggregate Interactome Reveal Stage‐Specific Vulnerabilities in Alzheimer's Disease

Advanced Science, EarlyView.
Tau populations with different aggregation states associate with distinct sets of proteins in the Alzheimer's disease brain. Proteomic discovery combined with single‐molecule analysis in neurons reveals dynamic associations involving proteostasis, metabolism and RNA biology.
Dorothea Böken, Paula Beltran Lobo, Yunzhao Wu, Lyla A. Rowe, Emre Fertan, Cara L. Croft, Maria Jimenez‐Sanchez, Dezerae Cox, David Klenerman   +8 more
wiley   +1 more source

Modulation of the TGF‐β/Smad Signaling Pathway by a Bioactive Oxidized Polygonati Rhizoma Polysaccharide Crosslinked Chitosan Hydrogel as Therapeutic Carrier for Parkinson's Disease Treatment

Advanced Science, EarlyView.
An injectable, self‐healing COPRP hydrogel integrates structurally defined oxidized Polygonati rhizoma polysaccharide with carboxymethyl chitosan through dynamic Schiff‐base crosslinking. The bioactive matrix scavenges reactive oxygen species, suppresses neuroinflammation, protects dopaminergic neurons, and supports sustained levodopa release.
Peng Dai, Jikuang Zhao, Chang Xue, Kailei Xu, Liang Yong, Zhuangwei Zhang, Yi Huang, Jianwei Shuai, Xianzhen Chen, Sheng Nie, Junpeng Xu   +10 more
wiley   +1 more source

Quantification of Methionine Oxidation in Cadaveric Wetting/Preservative Solutions

, 2019
Wet specimens used in biology classrooms and laboratories, including cadavers, can easily deteriorate into dried specimens if not handled properly. The continuous management of specimens with proper preparation and use of wetting solution is absolutely ...
Spence, Susan
core   +1 more source

A Hepatocyte‐to‐Stellate Cell Axis Couples Alternate‐Day Fasting to Liver Fibrosis Resolution via ATG7 S‐Nitrosylation

Advanced Science, EarlyView.
Alternate‐day fasting suppresses mitochondrial complex II assembly via SDHAF4 to upregulate hepatocyte eNOS. The resulting nitric oxide S‐nitrosylates ATG7 at C184 in hepatic stellate cells, restraining autophagic flux and preventing their profibrotic activation.
Xueqiang Wang, Mengqi Zeng, Cunxiao Sun, Yuhan Gou, Zhaode Feng, Weiqiang Lv, Chaoying Yan, Hansen Wu, Pengfei Zhang, Jie Xu, Ke Cao, Hao Li, Mingge Ding, Zhongbo Liu, Xing Zhang, Jiankang Liu, Xuan Zou, Zhihui Feng   +17 more
wiley   +1 more source