HomeScienceSwarms of mutant bacteria look just like Van Gogh's 'Starry

Swarms of mutant bacteria look just like Van Gogh’s ‘Starry

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Image at 10 times magnification of an experimental mixture of myxobacteria from a strain that overexpresses TraAB and adheres to itself (yellow) and a strain that is non-adhesive and non-reversing (blue). (Image credit: D. Wall/University of Wyoming)

A group of swarming bacteria just created strikingly artistic (and swirly) “paintings” that are reminiscent of the masterpieces by iconic Dutch painter Vincent van Gogh. 

Microbiologists noticed the similarities while studying the social cooperation of predatory bacteria called Myxococcus xanthus. Individuals in this species are known to form cooperative swarms, in which they share resources to help overwhelm their prey. The researchers were specifically studying a pair of proteins, TraA and TraB, that allow these microbes to recognize and bond with each other. To do this, the team created mutated strains of M. xanthus that overexpressed the genes behind these proteins, to see how they would change, the scientists reported in a study published Dec. 7 in the journal mSystems.

As the mutated strains formed swarms with other mutated strains and with nonmutated strains, the clumps of conjoined cells formed swirling patterns. The researchers then digitally added different colors to distinguish each strain. Once the color was added, the team realized the striking resemblance between the bacteria-made art and Van Gogh’s, especially with the blue-and-yellow image that has a striking resemblance to “The Starry Night,” one of the most famous pieces by the 19th-century painter.

Related: Gallery: 5 times science inspired art 

Image 1 of 2

Image at four times magnification of an experimental mixture of myxobacteria from a strain that overexpresses TraAB and adheres to itself (green) and a strain that is non-adhesive and non-reversing (red). (Image credit: D. Wall/University of Wyoming)Image 2 of 2

Experimental mixture of two myxobacteria strains that overexpress different types of TraA receptors (red and green) that adhere to themselves but not each other. (Image credit: D. Wall/University of Wyoming)

The discovery highlights how studying social bacteria may reveal “behaviors that also exhibit artistic beauty,” study co-author Daniel Wall, a molecular biologist at the University of Wyoming, said in a statement.

M. xanthus individuals form cooperative swarms by pooling their enzymes (proteins) and metabolites (chemicals), which help turn food into energy by speeding up metabolic reactions. This enables the bacteria to overwhelm their prey, which are typically other microbes. (They sometimes also gobble up other, unrelated strains of M. xanthus.) Normally, these swarms are head-to-tail chains of individual cells in a long line like a “commuter train,” study co-author Oleg Igoshin, a computational biologist at Rice University in Texas, said in the statement. However, the mutations introduced in the lab caused the usual head-to-tail swarms to turn into rotating swirls of cells, each swirl as large as a millimeter (0.04 inch) or more. 

“The cells are in dense groups and are in contact with others all the time,” much more than in their usual swarms, Igoshin said in the statement. 

The overexpression of TraA and TraB also created stronger bonds that meant the bacteria swarms stuck together longer and seemed to be unable to revert to individual cells. In mutated strains, “your neighbor will remain your neighbor for longer,” Igoshin said in the statement.

Originally published on Live Science.

Read The Full Article Here

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