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Bacteria use 'toxic darts' to disable each other, according to UCSB scientists
Date:11/18/2010

eases to grow. The cell is inactivated, inhibited from growth. Similarly, many antibiotics do not kill bacteria; they only prevent the bacteria from growing. Then the body flushes out the dormant cells.

Some toxic tips appear to function inside the targeted bacteria by cutting up enemy RNA so the cell can no longer synthesize protein and grow. Other toxic tips operate by cutting up enemy DNA, which prevents replication of the cell.

"Our data indicate that CDI systems are also present in a broad range of bacteria, including important plant and animal pathogens such as E. coli which causes urinary tract infections, and Yersinia species, including the causative agent of plague," said senior author David Low, professor of MCDB. "Bacteria may be using these systems to compete with one another in the soil, on plants, and in animals. It's an amazingly diverse world."

The team studied the bacteria responsible for soft rot in potatoes, called Dickeya dadantii. This bacteria also invades chicory leaves, chrisanthemums, and other vegetables and plants.


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Contact: Gail Gallessich
gail.g@ia.ucsb.edu
805-893-7220
University of California - Santa Barbara
Source:Eurekalert  

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