pheromone-controlled

RNA-directed gene choice

March 2015: ChemoSense; see Timothy S. McClintock: “Odorant Receptor Gene Choice” He concludes: “The epigenetic control of OR gene expression through repression and de-repression is a remarkable story, and as a fundamental mechanism intimately associated with the random differentiation of a neural progenitor cell into multiple neuronal subtypes, one wonders whether it might be a RNA-directed gene choice

What about birds?

A sex researcher who typically fails to respond to my comments and questions recently noted that: “New species are only supposed to arise when a population separates into two.” She asked: “So what’s going on with the birds on tiny Santa Cruz Island?” I would have been happy to tell her — if ever she What about birds?

Reverse phosphorylation

See for review: Let there be anti-entropic light (1)   Squid are hyper-editors when it comes to RNA This is a great summary of what is currently known about anti-entropic light and nutrient-dependent RNA-mediated pheromone-controlled cell type differentiation. Excerpt: “During RNA editing, specific enzymes alter nucleotides in mRNA transcripts so that the resulting protein differs Reverse phosphorylation

RNA-mediated repurposing in microbes and adaptations in primate brains

Human-specific gene ARHGAP11B promotes basal progenitor amplification and neocortex expansion Excerpt: “…the C-terminal 47 amino-acids of ARHGAP11B (after lysine-220) constitute not only a unique sequence, resulting from a frameshifting deletion (fig. S10), but also are functionally distinct from their counterpart in ARHGAP11A.” My comment: Co-author Svante Paabo is the senior author of this 2003 publication: RNA-mediated repurposing in microbes and adaptations in primate brains

RNA-mediated “repurposing” is nutrient-dependent and pheromone-controlled

 Evolutionary resurrection of flagellar motility via rewiring of the nitrogen regulation system Excerpt: The fast-spreading strain AR2F had acquired an additional point mutation in the σ54-dependent EBP gene ntrC, which alters an amino acid (R442C) within the DNA binding domain (Table 1 and table S2). Reported as: Evolutionary Rewiring Strong selective pressure can lead to RNA-mediated “repurposing” is nutrient-dependent and pheromone-controlled

RNA-mediated "repurposing" is nutrient-dependent and pheromone-controlled

 Evolutionary resurrection of flagellar motility via rewiring of the nitrogen regulation system Excerpt: The fast-spreading strain AR2F had acquired an additional point mutation in the σ54-dependent EBP gene ntrC, which alters an amino acid (R442C) within the DNA binding domain (Table 1 and table S2). Reported as: Evolutionary Rewiring Strong selective pressure can lead to RNA-mediated "repurposing" is nutrient-dependent and pheromone-controlled

Let there be anti-entropic light (1)

Summary: Light-induced amino acid substitutions link cell type differentiation in plants to nutrient-dependent pheromone-controlled reproduction in animals via the biophysically constrained chemistry of protein folding. Protein folding is perturbed by mutations that limit the ability of organisms to adapt to ecological variation. Viruses contribute to mutations. The sun’s biological energy appears to supply the anti-entropic Let there be anti-entropic light (1)

An epigenetic trap (the prequel)

See also: An epigenetic trap (the sequel) Excerpt: “Support for the link from one epigenetic trap to cell type differentiation was included in the molecular epigenetics section of our 1996 review, which detailed how RNA-mediated chromatin remodeling occurs.” My comment: One epigenetic trap leads to the de novo creation of olfactory receptor genes and cell An epigenetic trap (the prequel)

Imagining that data historically supports evolutionary theory

1) Arguments in the evo-devo debate: say it with flowers! Abstract excerpt: A key question in evolutionary developmental biology is how DNA sequence changes have directed the evolution of morphological diversity. The widely accepted view was that morphological changes resulted from differences in number and/or type of transcription factors, or even from small changes in Imagining that data historically supports evolutionary theory

The anti-entropic force of "Nature"

Exploring the Epigenome A National Institutes of Health-funded consortium publishes 111 reference maps of DNA and histone marks. By Jenny Rood | February 18, 2015 Excerpt:  “All our cells have a copy of the same book, but they’re all reading different chapters, bookmarking different pages, and highlighting different paragraphs and words.” These chemical bookmarks, such The anti-entropic force of "Nature"