histone acetylation

Epigenetic facts vs variable recombination theories

6/14/13 Nutrient-dependent/pheromone-controlled adaptive evolution: a model ….the model represented here is consistent with what is known about the epigenetic effects of ecologically important nutrients and pheromones on the adaptively evolved behavior of species from microbes to man. Minimally, this model can be compared to any other factual representations of epigenesis and epistasis for determination of the best scientific ‘fit’. 7/25/13 Jay R. Feierman: Variation is not nutrient availability and the something that is doing the selecting is not the individual…

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Energy-dependent purifying selection / autophagy (5)

See: Energy-dependent purifying selection / autophagy (4) See also: Team develops method to better identify genes involved in diseases If we can pinpoint the genetic mutations that cause a particular disease, we can associate those mutations with specific proteins, and then design drugs to block or activate those proteins. We can also measure the activity of proteins identified in this manner to diagnose diseases more accurately, which is a major goal of precision medicine. In: Histone Acetylome-wide Association Study of…

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The tipping point? 50,000 publications (4)

The National Microbiome Event has now been placed into the context of the Precision Medicine Initiative. Taken together, metabolic networks are linked to genetic networks via energy-dependent RNA-mediated protein folding chemistry in the context of changes in microRNA flanking sequences that link hydrogen-atom transfer in DNA base pairs in solution from energy-dependent changes in base pairs to the physiology of reproduction and cell type differentiation in all living genera. But see: A genome-wide association scan implicates DCHS2, RUNX2, GLI3, PAX1…

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Molecular Diagnostics: What is unprotected life (4)

Pado, a fluorescent protein with proton channel activity can optically monitor membrane potential, intracellular pH, and map gap junctions Excerpt: Nature has developed a vast array of voltage-responsive proteins. To improve our ability to optimize the voltage sensitivity, kinetics, and signal size of GEVIs, an in silico search strategy was developed to identify potential voltage-sensing proteins since new genomes are routinely being sequenced. The use of a conserved amino acid motif in the second transmembrane segment of the voltage-sensing phosphatase…

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Ricki Lewis’ Time Machine (4)

Variants near CHRNA3/5 and APOE have age- and sex-related effects on human lifespan Excerpt: The signal we observe is driven by rs429358, a non-synonymous Cys112Arg variant, which defines the ε4 allele and which has not previously been shown to be the causal variant influencing lifespan. See also: Gorilla Genome 2.0: Lessons for the Clinic? Excerpt: VARIANTS OF UNCERTAIN SIGNIFICANCE With phrases such as “settled science” and “scientific proof” part of the lexicon, it’s little wonder that health care consumers expect…

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Neuroscience Virtual Event vs AAAS Symposium

Neuroscience Virtual Event Abstract Submission Poster title: From hydrogen-atom transfer in DNA base pairs to ecosystems (March 16-17, 2016) Abstract: This atoms to ecosystems model of ecological adaptations links nutrient-dependent epigenetic effects on DNA base pairs in solution and RNA-mediated amino acid substitutions to chromosomal rearrangements via pheromone-controlled changes in the microRNA / messenger RNA balance. The nutrient-dependent pheromone-controlled changes are required for the thermodynamic regulation of intracellular signaling, which enables biophysically constrained nutrient-dependent & pH-dependent protein folding; experience-dependent receptor-mediated behaviors,…

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RNA-mediated theory killers (4)

DNA methylation and microRNA biomarkers for noninvasive detection of gastric and colorectal cancer Excerpt: At this moment, DNA methylation and non-coding RNA including with microRNAs (miRNAs) and long non-coding RNAs (lncRNAs) represent the largest body of available literature on epigenetic biomarkers with the highest potential for cancer diagnosis. My comment: The SLC19A3 microRNA was mentioned in the context of cancer and brain development in The impact of new technologies on clinical decision-making in health care. The location of the base…

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Eliminating correlations from evolutionary ecology

De novo creation of olfactory receptor genes clearly links food odors via amino acid substitutions to cell type differentiation in mosquitoes, and in nematodes, flies, honeybees, etc. It would be surprising if cause and effect did not extend to vertebrates from invertebrates. Indeed, Elekonich and Robinson (2000) linked our 1996 model of RNA-mediated cell type differentiation to hormone-organized and hormone-activated behavior in insects more than a decade ago. Since then, Vosshall’s lab has established the role that amino acid substitutions…

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  • What Darwin proved: there’s no such thing as a species
    GENETICS As Animals Mingle, a Baffling Genetic Barrier A short stretch of DNA is challenging what it means to be a species. By: Emily Singer August 5, 2014 Excerpt: “Scientists have dubbed such regions of the genome “islands of speciation.” The persistence of such islands is a phenomenon that has been observed in a variety of […]
  • Randomness and Divine Providence
    A Q&A on randomness and God’s providence …the main goal is to really put together a collection of scholarly studies of these issues: physicists, biologists, mathematicians, statisticians, philosophers and theologians. replaced: Randomness and Divine Providence Supported by the John Templeton...Read more