How do you combat bacterial infections at the molecular level

Have you ever wondered what antibiotics really do to kill bacteria? Or how to develop and design new antibiotics? People are living in a kind of symbiosis with various types of bacteria that are beneficial for our body and therefore we cannot just beat them all to death.

Background - Listeria is a Gram-positive bacteria related to both Bacillus, and the Streptococcus family. Only two of the known strains of the bacteria are pathogenic, Listeria monocytogenes and L. ivanovi. L. monocytogenes can infect both humans and animals. In healthy individuals the infection rate is limited, with symptoms of mild stomach upset, the infections can often be killed relatively quickly. But if you are unfortunate enough to belong to a risk group, for example if you suffer from impaired immune system during hospitalization a listeria infection can become a serious problem. In these cases, listeria can cause severe diseases like meningitis, bacteriamia, brain abscess or septic abortion in pregnant women. Listeriosis is most commonly transmitted through food poisoning, like dairy and meat products. Cases concerning Listeria poisoning often receive massive media coverage, the mortality of infected individuals at risk can reach over 30%. Latest example in Norway is from 2007 where a listeria poisoning from Radium Hospital canteen kitchen resulted in two deaths.

 

Projects - We work with specific membrane pumps and transporters in the Listeria cell membrane, and trying to understand the molecular basis for calcium homeostasis in the bacterium down to the protein chemical level. There are two genes encoding the calcium pumps in the Listeria genome sequence. We have expressed one of these  pumps, and three of the genes located in the same operon  and are actively try to understand how these proteins work together.

From you we expect: Commitment, scientific curiosity,  ability to work independently after 2-3 months. We consider laboratory work for a master degree a full time position, minimum 37+ hours a week

 

Molecular biological techniques you are likely to come into contact with and could be trained in

? Primer design, cloning, subcloning into E. coli.
? Growth Studies with Listeria innocua, a noninvasive strain.
? RNA / DNA purification and qPCR.
? Expression of membrane proteins in E. coli.
? Purification and relipidering of membrane proteins.
? Characterization of membrane proteins such as phosphorylation experiments.
? Crystallization and structure solution of proteins.

 

Figure 1. Cartoon representation of a Ca 2+ATPase from Listeria. The different domains are color coded, Nucleotide binding domain (red), phosporylation domain (blue), actuator domain (yellow) and the transmembrane region in brown and green. The membrane is represented as lines with the extracelluar space facing up and the cytoplasmic side facing downwards.

 

We are located in the Science Park on the 5th Floor in completely renovated laboratories. The general language in the laboratory is English.

http://www.med.uio.no/ncmm/english/groups/morth-group/

 

Published Apr. 19, 2018 8:13 AM - Last modified July 16, 2018 2:05 PM

Scope (credits)

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