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Reactions of SleC, Its Structure and Inhibition in Mitigation of Spore Germination in .
J Am Chem Soc
January 2025
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Spore germination in is initiated by a cascade of activities of several proteins that culminates in the activation of SleC, a cell-wall-processing enzyme. We report herein the details of the enzymatic activities of SleC by the use of synthetic peptidoglycan fragments and of spore sacculi. The reactions include the formation of 1,6-anhydromuramate─a hallmark of lytic transglycosylase activity─as well as a muramate hydrolytic product, both of which proceed through the same transient oxocarbenium species.
View Article and Find Full Text PDFPartially hydrolyzed guar gum alleviates neurological deficits and gastrointestinal dysfunction in mice with traumatic brain injury.
Neurosurg Rev
January 2025
Department of Critical Care Medicine, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Zhou shan hui shui Community,199 Hailing South Road, Taizhou, Jiangsu Province, 225300, China.
Traumatic brain injury (TBI)-associated neuroinflammation and neurotoxicity can induce gastrointestinal dysfunction through the brain-gut axis. Partially hydrolyzed guar gum (PHGG) was demonstrated to exert beneficial health effects by altering gut microbiota and short-chain fatty acids (SCFAs) production. Our study aimed to explore the effects of PHGG on gastrointestinal dysfunction in TBI mouse models.
View Article and Find Full Text PDFChinese and western medicine treatment of myocardial fibrosis drugs.
Front Cardiovasc Med
January 2025
Department of Acupuncture, Bao'an Authentic TCM Therapy Hospital, Shenzheng, China.
Myocardial fibrosis (MF) is a common pathological manifestation of many cardiovascular diseases, such as myocardial infarction, myocardial ischemia, and sudden cardiac death. It is characterized by excessive proliferation and activation of fibroblasts, transformation into myofibroblasts, and, eventually, excessive deposition of the extracellular matrix, resulting in heart damage. Currently, modern drugs such as angiotensin-converting enzyme inhibitors, diuretics, and β-blockers can improve myocardial fibrosis in clinical treatment, but their therapeutic effect on this disease is limited, with obvious side effects and high cost.
View Article and Find Full Text PDFPulmonary and serum cytokine profiles of patients with anti-ARS and anti-MDA5 antibodies.
J Autoimmun
January 2025
Department of Rheumatology, Dokkyo Medical University, Mibu, Tochigi, 321-0293, Japan.
The present study aimed to determine the pulmonary cytokine profiles of patients with anti-RNA synthetase (ARS) and anti-melanoma differentiation-associated protein 5 (MDA5) antibodies. The study included patients with ARS and MDA5 whose serum or bronchoalveolar fluid (BALF) was available. Sandwich enzyme-linked immunoassay microarray multiplex assay was used to measure 18 cytokine levels in serum and BALF.
View Article and Find Full Text PDFStructural insights into 2-oxindole-forming monooxygenase MarE: Divergent architecture and substrate positioning versus tryptophan dioxygenases.
J Biol Chem
January 2025
Department of Chemistry, The University of Texas at San Antonio, Texas 78249, United States. Electronic address:
MarE, a heme-dependent enzyme, catalyzes a unique 2-oxindole-forming monooxygenation reaction from tryptophan metabolites. To elucidate its enzyme-substrate interaction mode, we present the first X-ray crystal structures of MarE in complex with its prime substrate, (2S,3S)-β-methyl-L-tryptophan and cyanide at 1.89 Å resolution as well as a truncated yet catalytically active version in complex with the substrate at 2.
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