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is widely used in traditional Chinese medicine and contains rich bioactive compounds. These compounds often have a methyl group at their 4'-OH position catalyzed by methyltransferases. Therefore, studying methyltransferases in plants is of great significance. In this study, a flavonol methyltransferase, EpOMT4, was isolated from B.L. Guo. The recombinant enzyme regiospecifically transferred a methyl group to the 4'-OH position of 8-prenylkaempferol forming icaritin. The study demonstrates that enzymatic methylation of flavonoids in plants holds significant potential and could provide a promising alternative method for the biosynthetic production of bioactive methylated prenylflavonoids.
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http://dx.doi.org/10.1080/10286020.2024.2411710 | DOI Listing |
J Biomol NMR
September 2025
Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA.
Biomolecular dynamics in the microsecond-to-millisecond (µs-ms) timescale are linked to various biological functions, such as enzyme catalysis, allosteric regulation, and ligand recognition. In solution state NMR, Carr-Purcell-Meiboom-Gill (CPMG) relaxation dispersion experiments are commonly used to probe µs-ms timescale motions, providing detailed kinetic, thermodynamic, and mechanistic information at the atomic level. For investigating conformational dynamics in high-molecular-weight biomolecules, methyl groups serve as ideal probes due to their favorable relaxation properties, and C CPMG relaxation dispersion is widely employed for characterizing dynamics in selectively CH-labeled samples.
View Article and Find Full Text PDFArch Microbiol
September 2025
División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato, Zip Code 36050, Guanajuato, Mexico.
Plasmids are fundamental to molecular biology and biotechnology, playing a crucial role in bacterial evolution. Some plasmids are linked to complex cellular dynamics, including pathogenicity islands, antibiotic resistance, and gene mobilization. This study reports the isolation and sequencing of two cryptic plasmids with different electrophoretic mobilities from the Escherichia coli clinical isolate O55.
View Article and Find Full Text PDFTree Physiol
September 2025
Pollen Biotechnology of Crop Plants Group, Margarita Salas Center of Biological Research, CIB-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain.
Somatic embryogenesis (SE) is an in vitro mass propagation system widely employed in plant breeding programs. However, its efficiency in many forest species remains limited due to their recalcitrance. SE relies on the induction of somatic cell reprogramming into embryogenic pathways, a process influenced by transcriptomic changes regulated, among other factors, by epigenetic modifications such as DNA methylation, histone methylation, and histone acetylation.
View Article and Find Full Text PDFJ Investig Med
September 2025
Unidad de Investigación Biomédica, Delegación Durango, Instituto Mexicano del Seguro Social, Durango, México.
It has been reported that DNA methylation in the epigenetic profile of the genes LEP and ADIPOQ is associated with obesity. To the best of our knowledge, there are no previous reports assessing the methylation of the LEP, LEPR, and ADIPOQ genes in subjects with metabolically healthy obesity (MHO). Therefore, the aim of this study was to determine the association between methylation of the LEP, LEPR, and ADIPOQ genes with the MHO phenotype.
View Article and Find Full Text PDFAnn Afr Med
September 2025
Department of Pediatrics, MGM Medical College and LSK Hospital, Kishanganj, Bihar, India.
Autoimmune hemolytic anemia (AIHA) is uncommon in the pediatric population, particularly when it manifests as severe anemia. AIHA is characterized by a positive direct antiglobulin test (DAT) and immune-mediated red blood cell (RBC) destruction. AIHA is subclassified on the basis of the thermal characteristics of autoantibody into warm, cold, and mixed.
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