Proteins encapsulated within sol-gel matrices (SG) have the potential to fill many scientific and technological roles, but these applications are hindered by the limited means of probing possible structural consequences of encapsulation. We here present the first demonstration that it is possible to obtain high-resolution, solution NMR measurements of proteins encapsulated within a SG matrix. With the aim of determining the breadth of this approach, we have encapsulated three paramagnetic proteins with different overall charges: the highly acidic human Fe3+ cytochrome b5 (cyt b5); the highly basic horse heart cytochrome c (cyt c); and the nearly neutral, sperm whale cyanomet-myoglobin. The encapsulated anionic and neutral proteins (cyt b5; myoglobin) undergo essentially free rotation, but show minor conformational perturbations as revealed by shifts of contact-shifted peaks associated with the heme and nearby amino acids.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ja066244m | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of the antimicrobial effect of encapsulated cumin seed essential oil in chickpea protein-maltodextrin matrix and its potential to extend the shelf life of meatballs.
Food Sci Technol Int
January 2025
Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul, Türkiye.
This study aimed to evaluate the antimicrobial effectiveness of cumin seed essential oil (CEO) after encapsulation in chickpea protein-maltodextrin matrix by spray drying and to provide insight into potential use as a natural ingredient in meat-based products. The surface morphology results of encapsulated CEO showed the dispersion in the wall material matrix, and the observed specific common peaks in the FT-IR spectra of encapsulated and non-encapsulated CEO proved the successful encapsulation. The antibacterial activity of non-encapsulated CEO against BC1402, ATCC 27853, Typhimurium ATCC 0402, ATCC 25923 were first evaluated by disc diffusion assay.
View Article and Find Full Text PDFMicrofluidic 3D cell culture: potential application of collagen hydrogels with an optimal dose of bioactive glasses.
Sci Rep
January 2025
Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
We engineered a microfluidic platform to study the effects of bioactive glass nanoparticles (BGNs) on cell viability under static culture. We incorporated different concentrations of BGNs (1%, 2%, and 3% w/v) in collagen hydrogel (with a concentration of 3.0 mg/mL).
View Article and Find Full Text PDFMyrtenol-loaded niosomes can prevent lung ischemia-reperfusion injury model in rats by balancing the Nrf2/Keap1 and NF-κB signaling pathways.
Naunyn Schmiedebergs Arch Pharmacol
January 2025
Department of Physiology and Pharmacology, Afzalipour Medical Faculty, Kerman university of Medical Sciences, Kerman, Iran.
Lung Ischemia-reperfusion injury (LIRI) is a risk during lung transplantation that can cause acute lung injury and organ failure. In LIRI, the NF-E2-related factor 2(Nrf2)/ Kelch-like ECH-associated protein 1 (Keap1) signaling pathway and the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathway are two major pathways involved in regulating oxidative stress and inflammation, respectively. Myrtenol, a natural compound with anti-inflammatory and antioxidant properties, has potential protective effects against IRI.
View Article and Find Full Text PDFLiving plastics from plasticizer-assisted thermal molding of silk protein.
Nat Commun
January 2025
Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA.
The pursuit of materials, particularly plastics, with a minimal ecological footprint throughout their circular lifecycle, is crucial for advancing sustainable materials development. Living materials composed of embedded yet active organisms can leverage endogenous biotic resources to achieve functional materials that align with sustainability goals. However, current living material systems face challenges such as weak mechanical properties, limited environmental adaptability, and restricted cellular functionality.
View Article and Find Full Text PDFTuning Bro̷nsted Acidity by up to 12 p Units in a Redox-Active Nanopore Lined with Multifunctional Metal Sites.
J Am Chem Soc
January 2025
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, New Jersey 08854, United States.
Electrostatic interactions, hydrogen bonding, and solvation effects can alter the free energies of ionizable functional groups in proteins and other nanoporous architectures, allowing such structures to tune acid-base chemistry to support specific functions. Herein, we expand on this theme to examine how metal sites ( = H, Zn, Co, Co) affect the p of benzoic acid guests bound in discrete porphyrin nanoprisms () in CDCN. These host-guest systems were chosen to model how porous metalloporphyrin electrocatalysts might influence H transfer processes that are needed to support important electrochemical reactions (e.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!