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University Hospital Bonn

uni-bonn.de

Founded Year

1818

About University Hospital Bonn

University Hospital Bonn is a tertiary referral academic teaching hospital. It is based in Bonn, Germany.

Headquarters Location

Universität Bonn

Bonn, 53012,

Germany

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Latest University Hospital Bonn News

New function of CRISPR gene scissors discovered

Nov 25, 2022

Photo/Shutterstock For several years, the CRISPR /Cas9 gene scissors have been causing a sensation in science and medicine. Researchers from the Institute of Structural Biology at the University Hospital Bonn (UKB) in Germany and the Medical Faculty of the University of Bonn, in cooperation with the partner University of St Andrews in Scotland and the European Molecular Biology Laboratory in Hamburg, Germany, have discovered a new function of the gene scissors. The study was published in the journal Nature. When an attacking phage injects its genetic material into a bacterium, it is forced to produce new phages, which in turn infect more bacteria. Some bacteria have evolved the CRISPR system in response. With this bacterial immune system, the phage genetic material is recognized and destroyed. At the same time, the resulting fragments are integrated into the genome of the bacterium. This creates a kind of library that the CRISPR immune system can access again and again and is thus armed for future attacks. In addition, it was discovered that so-called type III variants of the gene scissors produce small signal molecules. With the help of these small molecules, the bacteria switch on a complex emergency plan. This ensures that a virus can be combated optimally and on a broad front. The research team discovered that the small signal molecules bind, among other things, to a protein called CalpL, which thereby becomes an active “protease.” These are enzymes that cleave proteins and thus function as protein scissors. “Proteases are also used in the human immune system to pass on information at high speed,” said Niels Schneberger, a doctoral student at UKB’s Institute of Structural Biology and one of the study’s two first authors. Content continues below Related Content Finally, the researchers also found the target of their newly discovered protein scissors. It cuts a small protein molecule called CalpT, which acts like a safety latch for CalpS, a third protein molecule. “CalpS is a very well-guarded protein that is released by the whole mechanism. It’s going to bring the transcription machinery to specific genes, switching the metabolism of the bacterium to defense. We are very curious of knowing what those genes are,” said Christophe Rouillon, a visiting scientist at the Institute of Structural Biology and first author on the study. With the discovery of this complicated signaling cascade, the researchers said they have uncovered a whole new aspect to CRISPR systems. “With this CRISPR-activated protein scissors, there is now a brand-new tool in the toolbox of molecular biology,” said Gregor Hagelueken, group leader at the Institute of Structural Biology at the UKB and member of the Transdisciplinary Research Area “Life and Health” at the University of Bonn. “And perhaps this will allow CRISPR to be used in even more versatile ways in the future.” Explore Related Topics:

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University Hospital Bonn Frequently Asked Questions (FAQ)

  • When was University Hospital Bonn founded?

    University Hospital Bonn was founded in 1818.

  • Where is University Hospital Bonn's headquarters?

    University Hospital Bonn's headquarters is located at Universität Bonn, Bonn.

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