From hydrogen atom transfer in DNA base pairs to ecosystems
posterposted on 01.08.2016, 02:54 by James V Kohl
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, and organism-level thermoregulation in ever-changing ecological niches and social niches. Critical limits for enhanced medical care already include what is known about the RNA-mediated physics and chemistry of biologically-based ecological, social, neurogenic and socio-cognitive niche construction. The epigenetic landscape is clearly linked to the physical landscape of supercoiled DNA and top-down causation is manifested in increasing organismal complexity in species from microbes to humans. In all vertebrates and invertebrates the reciprocal relationships of species-typical nutrient-dependent & pH-dependent morphological and behavioral diversity are enabled by microRNAs, adhesion proteins, and pheromone-controlled reproduction. Ecological variation and biophysically constrained natural selection of nutrients cause the RNA-mediated behaviors that enable ecological adaptations, which include development of the brain during life history transitions. Ideas from population genetics typically exclude ecological factors, which must be linked to cell type differentiation. Theories are integrated with an experimental evidence-based approach that establishes what is currently known in the context of this mammalian model.