"Danger!" signals TLR9, the molecular sensor, whenever it recognizes bacterial or viral genetic information, specifically DNA. Instantly, the immune system initiates the process of fighting off the infection.
This immune cell produces TLR9, which glows green when irradiated with laser light. The molecule is localized on the edge of tiny spheres within the cell, where it will ultimately encounter pathogenic DNA.
In order to be fully operational, a portion of the protein must first be cleaved off – this is done by “molecular scissors”, which the researchers identified as well. Both transport into the endolysosomes and cleavage of the protein depend upon the presence of a second protein called UNC93B1. "We thus managed to identify a number of important components that are key to TLR9's ability to recognize bacterial and viral intruders and set off an alarm," says Dr. Margit Oelkers, another HZI scientist involved in the project. Studying TLR9's transport within different immune cell types, the researchers found out that the process actually varies from one cell type to the next. Says Brinkmann: "The results are helping us better understand how TLR9 works. Our findings are critical if we are to exploit the molecule's properties for therapeutic purposes."
Dr. Birgit Manno | Helmholtz-Zentrum
Rochester scientists discover gene controlling genetic recombination rates
23.04.2018 | University of Rochester
One step closer to reality
20.04.2018 | Max-Planck-Institut für Entwicklungsbiologie
Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.
Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
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23.04.2018 | Physics and Astronomy
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