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Researchers describe future target mechanism for antibiotics

Date:
January 17, 2011
Source:
Ume universitet
Summary:
So-called type-3 secretion systems of pathogenic bacteria may be a suitable point of attack for future antibiotics.

So-called type-3 secretion systems of pathogenic bacteria may be a suitable point of attack for future antibiotics. This is shown by Professor Maria Fllman and her associates at Ume University in Sweden in the Proceeding of the National Academy of Sciences, PNAS, in the US.

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Many disease-causing bacteria, such as Yersinia, Salmonella, Shigella, and Chlamydia make use of a dedicated protein transport system to transmit pathogenic proteins to host cells. These so-called type-3 secretion systems (T3SS) consist of hollow pin-like structures on the outer shell of the bacteria. Virulence proteins that are exported through this structure are transported into host cells via an unknown mechanism.

The mechanism for this transport has previously been proposed to be occurring by injection via the pin-like structure directly from the inner part of the bacterium into the cytoplasma of the host cell. These researchers at Ume University have now shown that virulence proteins exist on the outside of the bacterium before it has bound to the host cell and that these proteins can be transported into the host cell via a bacteria-associated protein complex. These pioneering findings are a major breakthrough in our understanding of T3SS-dependent bacteria and also open new avenues for developing antibiotics that are more specific to this type of bacteria.

In modern medical research scientists are looking for new methods for delivering proteins into cancer cells. These findings may facilitate the development of such systems by making use of the T3SS protein complex.


Story Source:

The above story is based on materials provided by Ume universitet. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. Akopyan, T. Edgren, H. Wang-Edgren, R. Rosqvist, A. Fahlgren, H. Wolf-Watz, M. Fallman. Translocation of surface-localized effectors in type III secretion. Proceedings of the National Academy of Sciences, 2011; DOI: 10.1073/pnas.1013888108

Cite This Page:

Ume universitet. "Researchers describe future target mechanism for antibiotics." ScienceDaily. ScienceDaily, 17 January 2011. <www.sciencedaily.com/releases/2011/01/110117082302.htm>.
Ume universitet. (2011, January 17). Researchers describe future target mechanism for antibiotics. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2011/01/110117082302.htm
Ume universitet. "Researchers describe future target mechanism for antibiotics." ScienceDaily. www.sciencedaily.com/releases/2011/01/110117082302.htm (accessed January 25, 2015).

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