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[Vacuum ultraviolet laser dissociation and proteomic analysis of halogenated peptides].
Se Pu
February 2025
CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Chemical modifications are widely used in research fields such as quantitative proteomics and interaction analyses. Chemical-modification targets can be roughly divided into four categories, including those that integrate isotope labels for quantification purposes, probe the structures of proteins through covalent labeling or cross-linking, incorporate labels to improve the ionization or dissociation of characteristic peptides in complex mixtures, and affinity-enrich various poorly abundant protein translational modifications (PTMs). A chemical modification reaction needs to be simple and efficient for use in proteomics analysis, and should be performed without any complicated process for preparing the labeling reagent.
View Article and Find Full Text PDFAdvances in the Study of Halogenated Natural Products.
Curr Top Med Chem
January 2025
Harbin University of Commerce, Harbin, China.
Halogenated natural products are an important class of secondary metabolites that are widely distributed in nature. The presence of halogen atoms usually enhances the pharmacological activity of the compounds. As a result, halogenated natural products have shown promising pharmacological activities in antibacterial, antitumour, anti-inflammatory and antiplasmodial properties, providing a rich resource for the development of new drugs.
View Article and Find Full Text PDFCorrigendum to "Synthesis and biological evaluation of Halogen-Substituted novel α-Ketoamides as potential protein aggregation modulators in Alzheimer's disease" [Bioorg. Chem. 147 (2024) 107373].
Bioorg Chem
January 2025
Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (B.H.U.), Varanasi 221005, U.P., India. Electronic address:
Engineering hydrogen bonding at tyrosine-201 in the orange carotenoid protein using halogenated analogues.
Photosynth Res
January 2025
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
The Orange Carotenoid Protein (OCP) is a unique water-soluble photoactive protein that plays a critical role in regulating the balance between light harvesting and photoprotective responses in cyanobacteria. The challenge in understanding OCP´s photoactivation mechanism stems from the heterogeneity of the initial configurations of its embedded ketocarotenoid, which in the dark-adapted state can form up to two hydrogen bonds to critical amino acids in the protein's C-terminal domain, and the extremely low quantum yield of primary photoproduct formation. While a series of experiments involving point mutations within these contacts helped us to identify these challenges, they did not resolve them.
View Article and Find Full Text PDFLong-term outcome and antitumor immune activation response in prostate cancer treated with low-dose-rate brachytherapy.
Medicine (Baltimore)
November 2024
Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China.
To evaluate the long-term clinical outcomes of iodine-125 low dose-rate brachytherapy (LDR-BT)-based treatment approaches for ≤ cT3 prostate cancer (PC) patients in China, as well as the effects on the PC immune microenvironment. Data was retrospectively collected from 237 patients with ≤ cT3 PC who were treated with radical prostatectomy (RP) or LDR-BT alone or in combination with androgen deprivation therapy (ADT), and biochemical progression-free survival (bPFS), prostate cancer-specific survival (PCSS) and overall survival (OS) rates were compared. In 63 cases, PC patients received RP after biopsy, received at least 6 months of ADT before RP, or received LDR-BT and deferred limited transurethral resection of the prostate (TURP).
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