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baratronBacteria first species observed to use arsenic-laced DNA backbone
Evolutionary geochemist Felisa Wolfe-Simon, the lead author, and her colleagues found a strain of bacterium (GFAJ-1 of the Halomonadaceae family) that can grow in a medium abundant in arsenic and lacking phosphorus. The GFAJ-1 bacterium naturally resides in the arsenic-rich waters (200 uM) of Mono Lake located in California's Eastern Sierra, and it belongs to a family of proteobacteria that is known to accumulate arsenic. It's not remarkable that GFAJ-1 survives in high concentrations of arsenic, but what is startling is that it potentially integrates arsenic into its DNA and proteins.
w00t.
Evolutionary geochemist Felisa Wolfe-Simon, the lead author, and her colleagues found a strain of bacterium (GFAJ-1 of the Halomonadaceae family) that can grow in a medium abundant in arsenic and lacking phosphorus. The GFAJ-1 bacterium naturally resides in the arsenic-rich waters (200 uM) of Mono Lake located in California's Eastern Sierra, and it belongs to a family of proteobacteria that is known to accumulate arsenic. It's not remarkable that GFAJ-1 survives in high concentrations of arsenic, but what is startling is that it potentially integrates arsenic into its DNA and proteins.
w00t.
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Date: 2010-12-02 09:16 pm (UTC)It is astounding just how flexible and resilient DNA-based life actually is, and what it can adapt to.
(Incidentally, the link to the original Science paper at the bottom of that article is broken, but here's the right link.)