Tuberculosis (TB)

 
is one of the most long-standing epidemics of humanity. Despite all advances in medicine since the discovery of the mycobacterium tuberculosis pathogen by Robert Koch 120 years ago TB remains one of the most wide spread lethal bacterial diseases. According to estimates by the World Health Organisation (WHO), about one third or the earth's population is infected with MTB. Each year, there are about eight million new cases, and more than two million people per annum die from tuberculosis. Tuberculosis is becoming an increasing threat even in developed parts of the world because of a number of developments during the most recent decades.

• About 15 % of HIV-infected patients die from secondary infections by MTB.
• Drug-resistant MTB strains have emerged mostly because of deficient
performance of TB programs.
• The increasing global mobility of the human population supports the
rapid spreading of different MTB strains, including drug-resistant strains.

This situation has led to a renewed interest into MTB research. Since 1972, only one new drug (Rifapentine®) has been developed and introduced on the market in 1998. To stop this trend, several initiatives have been supported by the WHO and other organisations, to support new avenues of drug development by the pharmaceutical industry, such as the Global Alliance for TB Drug Development.


 

XMTB Structural Proteomics Consortium

 
The approach of the XMTB Structural Proteomics Consortium is based on the knowledge of the complete genome of Mycobacterium tuberculosis. It integrates a range of proteomics-oriented key technologies in the area of bioinformatics, screening of large ligands libraries, structural biology methods such as X-ray crystallography and NMR-spectroscopy, and proteomics based in vivo screening methods. We are aiming to determine 35 molecular structures of selected XMTB target proteins and 70 target – small molecular weight ligand. Five of these target proteins will be selected for the development of potential drugs.

Within the R&D part of the project, we are aiming to develop complementary structure-based high-throughput technologies using NMR spectroscopy and X-ray crystallography. While NMR is used to structurally map ligand binding sites on the selected targets, X-ray crystallography is applied for the determination of the target-ligand complex structures. Using these data, identified ligands are further investigated with the aim to directed drug discovery. The process is carried out by the combined application of structural proteomics methods and in vivo screens. To ensure the highest efficiency of this integrated approach a number of techniques and tools will be developed. A major focus is on the implementation of a large scale high-throughput crystallisation facility in Hamburg.


 
The XMTB consortium consists of three regional competence centres.

Hamburg

 
The Hamburg competence centre is presented by the Hamburg-Unit of the European Molecular Biology Laboratory (EMBL), the Max-Planck Groups for Structural Molecular Biology (MPG-ASMB) and the enterprise MarResearch GmbH. EMBL and MPG-ASMB are situated on campus of the German Electron Synchrotron (DESY) and are operating experimental stations for applications in life sciences using synchrotron radiation. MarResearch is one of the world-leading producers of detectors and other equipment for applications in X-ray crystallography. The company develops and implements a system to automatically mount samples on a local experimental station for X-ray structural analysis.

 

Berlin

 
The Berlin competence centre consists of the Max-Planck Institute for Infection Biology (MPI-IB), the Research Institute for Molecular Pharmacology (FMP) jointly with the company Combinature Biopharm AG. The MPI-IB is a leading centre in TB research, particularly in terms of a detailed proteome analysis of MTB, with the aim to develop novel vaccines. It cooperates with the EU-consortium TB-Vaccine. The FMP is situated on the campus of the Max-Dellbrück-Center in Berlin-Buch. It provides a leading infrastructure for high-throughput applications by NMR spectroscopy. The enterprise Combinature Biopharm AG develops and applies methods for screening of low molecular weight ligands with the aim to discover lead compounds for drug development.

 

Munich

 
The focus of the Munich competence centre is on bioinformatics and is presented by the Technical University Munich, Research Centre Weihenstefan (TUM-RCW), and by the company Biomax Informatics. TUM-RCW has been involved in the development and implementation and of databases and methods for the computer-based analysis of genomic and proteomic data. The focus of Biomax Informatics is on genome analysis and data integration, using in-house software developments.