Microbes

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

rp_poster-from-jesse.jpg

 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…
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Converting sunlight to fuel: O2 and CO2 Reactions

Physics

Efficient solar-to-fuels production from a hybrid microbial–water-splitting catalyst system Abstract excerpt:  “…we report the development of a scalable, integrated bioelectrochemical system in which the bacterium Ralstonia eutropha is used to efficiently convert CO2, along with H2 and O2 produced from…
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How fast can evolutionary theory be changed?

human-evolution

Boston, land of…creationists? Excerpt: “For example, right now a creationist with a Harvard science degree is lecturing in Boston on Evolution: Bankrupt Science; Creationism: Science You Can Bank On. Obviously, Dr Nathaniel Jeanson is one of the fruit loops who…
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Are viruses microRNAs?

diseases-disorders

Evolution of Intelligent Viruses and Jumping Genes Conclusion: “…it is intelligent warfare between mobile genetic elements and the epigenetic responses of the cell that, most likely, determines evolution.” My comment: This conclusion appears to place biologically-based cause and effect into…
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Beneficial microbes kill beneficial mutations

genetic code RNA medium

Microbiology: Here’s looking at you, squid Margaret McFall-Ngai has dissected the relationship between a beautiful squid and its live-in bacteria — and found lessons for microbiome research on the way. Ed Yong 14 January 2015 Excerpt: “We now know that…
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A single amino acid substitution differentiates cell types of E. coli

Genetic code

Rare amino acid influences E. coli infection Excerpt: “They found that E. coli O157 is unable to attach itself to host tissue in high concentrations of D-Serine. Other strains, such as those that cause meningitis, thrive in the presence of…
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Eliminating correlations from evolutionary ecology

terrarium eco system

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…
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Sexual differentiation of cell types in plants

terrarium eco system

Antheridiogen determines sex in ferns via a spatiotemporally split gibberellin synthesis pathway Excerpt: “Homosporous ferns have evolved a mechanism to favor cross-fertilization by controlling the sex ratio among individuals or prothalli within the population with the aid of antheridiogens. Antheridiogens…
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Biologically functional protein folding

diseases-disorders

Misfolded proteins clump together in a surprising place Excerpt 1): “Our findings have challenged the notion of the aggregation process as a passive consequence of accumulating misfolded proteins,” says Stowers Investigator Rong Li, Ph.D., who led the study. Using budding…
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RNA-mediated events: chromosomal rearrangements and genomic rearrangements

translocated chromosome

The Architecture of a Scrambled Genome Reveals Massive Levels of Genomic Rearrangement during Development Excerpt: “Genome-wide DNA rearrangements are most exaggerated in ciliates, particularly in the model organism Oxytricha trifallax, which programs not only DNA deletion, but also total reorganization,…
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