Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0014070 (encephalomyelitis)
 13,017 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The main molecular biology parameters of an attenuated mutant DMS-20/6 of eastern equine encephalomyelitis virus derived by treatment with dimethylsulphate of the wild type virus (strain No. 627) were determined. The sedimentation coefficient of sucrose density gradient purified and concentrated virus was 280 S, the buoyant density of virions in sucrose density gradient was 1.19 g/cm3. The DMS-20/6 virion had 3 proteins with molecular weights of 56, 50, and 34 kilodaltons, and the size of virions by negative staining was 58-77 nm.
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PMID:[Molecular biology characteristics of an attenuated mutant of the Eastern equine encephalomyelitis virus]. 631 69

We recently reported that a guanosine-rich 40-mer DNA aptamer (LJM-3064) mediates remyelination in the Theiler's murine encephalomyelitis virus mouse model of multiple sclerosis. Here, we characterize the G-quadruplex forms of this aptamer in vitro, and demonstrate using circular dichroism spectroscopy that LJM-3064 undergoes a monovalent ion-dependent conformational switch. In the presence of sodium ions and no potassium ions, LJM-3064 adopts an antiparallel-stranded G-quadruplex structure. When presented with low concentrations of potassium ions in a buffer that mimics the composition of interstitial fluid and blood plasma, LJM-3064 rapidly switches to a parallel-stranded G-quadruplex conformation, which is presumably the physiologically active folded form. We characterize these conformational states using dimethyl sulfate reactivity studies and Bal 31 nuclease probing. Our analysis indicates that only the 5'-terminal 26 nucleotides are involved in G-quadruplex formation. Thermodynamic characterization of LJM-3064 at physiologically relevant ion concentrations reveals the G-quadruplex to be metastable at human body temperature. These data provide important structural and thermodynamic insights that may be valuable in optimizing LJM-3064 as a therapeutic remyelinating agent.
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PMID:Ion-dependent conformational switching by a DNA aptamer that induces remyelination in a mouse model of multiple sclerosis. 2317 9