The sensitivity of QCM-D to molecular hydrodynamic properties is applied in this work to study conformational changes of the intrinsically disordered protein ZipA. Acoustic measurements can clearly follow ZipA's unstructured domain expansion and contraction with salt content and be correlated with changes in the hydrodynamic radius of 1.8 nm or less.
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http://dx.doi.org/10.1039/c6cc02127a | DOI Listing |
Microbiome
January 2025
Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
Background: The widespread selective pressure of antibiotics in the environment has led to the propagation of antibiotic resistance genes (ARGs). However, the mechanisms by which microbes balance population growth with the enrichment of ARGs remain poorly understood. To address this, we employed microcosm cultivation at different antibiotic (i.
View Article and Find Full Text PDFMethods Mol Biol
January 2025
Estrella Mountain Community College, Phoenix, AZ, USA.
Vacuole fusion is driven by SNARE proteins that require activation-or priming-by the AAA+ protein Sec18 (NSF) before they can bring membranes together and trigger the merger of two bilayers into a continuous membrane. Sec18 resides on vacuoles prior to engaging inactive cis-SNARE complexes through its interaction with the regulatory lipid phosphatidic acid (PA). Binding PA causes Sec18 to undergo large conformational changes that keeps it bound to the membrane, thus precluding its interactions with SNAREs.
View Article and Find Full Text PDFPaxillin (PXN) and focal adhesion kinase (FAK) are two major components of the focal adhesion complex, a multiprotein structure linking the intracellular cytoskeleton to the cell exterior. PXN interacts directly with the C-terminal targeting domain of FAK (FAT) via its intrinsically disordered N-terminal domain. This interaction is necessary and sufficient for localizing FAK to focal adhesions.
View Article and Find Full Text PDFMicroglia modulate their cell state in response to various stimuli. Changes to cellular lipids often accompany shifts in microglial cell state, but the functional significance of these metabolic changes remains poorly understood. In human induced pluripotent stem cell-derived microglia, we observed that both extrinsic activation (by lipopolysaccharide treatment) and intrinsic triggers (the Alzheimer's disease-associated genotype) result in accumulation of triglyceride-rich lipid droplets.
View Article and Find Full Text PDFTaiwan J Ophthalmol
November 2024
Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan.
Myopia has become a globally prevalent ocular disease. The choroid plays a vital role in myopia, and its changes tend to occur earlier than those of the retina and long-term variations in eye growth. Abnormal axial growth is an intrinsic characteristic of myopia, accompanied by ocular biomechanical changes that result in chorioretinal atrophy, thinning, and other complications particularly in the choroidal vasculature.
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