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Heat shock protein 90α (HSP90AA1) is a molecular chaperone involved in a variety of cellular processes. Special attention is paid to how perillaldehyde ameliorates kidney injury by inhibiting HSP90AA1-mediated iron and pyrotoxicity, and in-depth analysis of the molecular structure and protein interactions of HSP90AA-1. The interaction between perillaldehyde and HSP90AA1 and the effect of perillaldehyde on the molecular structure of HSP90AA1 were analyzed by molecular docking and surface plasmon resonance technique. Western blot and immunohistochemical results showed that perillaldehyde could decrease the expression of HSP90AA1 and change its distribution in the kidney. Molecular docking and surface plasmonic resonance experiments revealed the high affinity binding between perillaldehyde and HSP90AA1, and further analysis showed that perillaldehyde could induce the conformational change of HSP90AA1, thereby inhibiting its function.
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http://dx.doi.org/10.1016/j.ijbiomac.2025.140954 | DOI Listing |
Am J Chin Med
September 2025
Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
Astragaloside IV (ASIV), the main active component of the traditional Chinese medicine HuangQi, exhibits ameliorating effects on myocardial fibrosis through unclear mechanisms. To investigate the effects of ASIV on Endothelial-to-mesenchymal transition (EndMT) in myocardial fibrosis, 10 ng/mL TGF-β1 was used to induce EndMT in human umbilical vein endothelial cells (HUVECs) and a 5 mg/kg/d subcutaneous injection of Isoproterenol (ISO) was used to induce myocardial fibrosis in mice . The drug affinity-responsive target stability (DARTS) was used to identify the target proteins of ASIV in endothelial cells.
View Article and Find Full Text PDFBiotechnol Lett
September 2025
Shandong Provincial Engineering Research Center for Precision Nutrition and Healthy Elderly Care, Qilu Medical University, 1678 Renmin West Road, Zibo, 255300, People's Republic of China.
Fatty acid synthase (FAS) is one of the most important enzymes in lipid biosynthesis, which can catalyze the reaction of acetyl-CoA and malonyl-CoA to produce fatty acids. However, the structure, function, and molecular mechanism of FAS regulating lipid synthesis in the fungus Mucor circinelloides are unclear. In the present study, two encoding fas genes in the high lipid-producing strain WJ11 and low lipid-producing strain CBS277.
View Article and Find Full Text PDFJ Enzyme Inhib Med Chem
December 2025
School of Life Sciences, Jinggangshan University, Ji'an, China.
Current antithrombotic therapies face dual constraints of bleeding complications and monitoring requirements. Although natural hirudin provides targeted thrombin inhibition, its clinical adoption is hindered by sourcing limitations. This study developed a recombinant hirudin variant HMg (rHMg) with enhanced anticoagulant activity through genetic engineering and established cost-effective large-scale production methods.
View Article and Find Full Text PDFCell Res
September 2025
Department of Immunology, Center for Immunotherapy, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
The pre-dimerization of endosome-localized RNA sensor Toll-like receptor 3 (TLR3) is required for its innate recognition, yet how TLR3 pre-dimers are formed and precisely primed for innate activation remains unclear. Here, we demonstrate that endosome-localized self RNA Rmrp directly binds to TLR3 and induces TLR3 dimerization in the early endosome but does not interact with endosome-localized TLR7, TLR8, TLR9 or cytoplasmic RNA sensor RIG-I under homeostatic conditions. Cryo-EM structure of Rmrp-TLR3 complex reveals a novel lapped conformation of TLR3 dimer engaged by Rmrp, which is distinct from the activation mechanism by dsRNA and the specific structural feature at the 3'-end of Rmrp is critical for its functional interaction with TLR3.
View Article and Find Full Text PDFFEBS J
September 2025
Neutron Scattering Division, Oak Ridge National Laboratory, USA.
Serine hydroxymethyltransferase (SHMT) is a critical enzyme in the one-carbon (1C) metabolism pathway catalyzing the reversible conversion of L-Ser into Gly and concurrent transfer of 1C unit to tetrahydrofolate (THF) to give 5,10-methylene-THF (5,10-MTHF), which is used in the downstream syntheses of biomolecules critical for cell proliferation. The cellular 1C metabolism is hijacked by many cancer types to support cancer cell proliferation, making SHMT a promising target for the design and development of novel small-molecule antimetabolite chemotherapies. To advance structure-assisted drug design, knowledge of SHMT catalysis is crucial, but can only be fully realized when the atomic details of each reaction step governed by the acid-base catalysis are elucidated by visualizing active site hydrogen atoms.
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