Pathogens are becoming increasingly resistant to antibiotics, causing problems for therapy. Doctors need to have antibiotics available that work in new kinds of ways.
The last few years of research have, however, found few such ways. One major difficulty for developers of antibiotics is choosing the proper point of attack against bacteria. There are hundreds of possible points of attack, according to genome analysis and laboratory culture experiments - but validation in in vivo infection models is largely lacking.
Infection biologists and proteomics researchers have now identified all the proteins involved in Salmonella metabolic paths during an infection. Dirk Bumann of Hannover Medical School led a team including Daniel Becker, Claudia Rollenhagen, Matthias Ballmaier and Thomas Meyer of the Max Planck Institute for Infection Biology. They isolated Salmonella from infected mice. Proteomics researchers Matthias Selbach and Matthias Mann from the Max Planck Institute of Biochemistry then turned to highly-sensitive mass spectrometry to look at the protein mixture - and discovered hundreds of different Salmonella metabolic path proteins. The scientists compared them with special protein databanks and identified possible points of attack for antibiotics.