Microbial Drugs

The majority of the medically important antibiotic drugs (including e.g., penicillins, cephalosporins, erythromycin, vancomycin, and daptomycin) are derived from secondary metabolites, which are produced by bacteria and filamentous fungi. Despite intensive world-wide efforts using alternative approaches based on synthetic chemistry, no other concept could so far surpass the historically successful strategy to exploit biologically active natural products as candidates for anti-infective drugs. The recently observed, increasing resistance of the human pathogens against antibiotics has prompted us to intensify our search for novel lead structures from microorganisms and fungi, which can be used as anti-infective drugs.



Sandra Halecker

PhD Student

Curriculum Vitae

Since 09/2013 
PhD student in the group of Prof. Marc Stadler, Helmholtz Centre for Infection Research, Braunschweig, Germany

10/2012 - 06/2013            
Diploma thesis in the department of Prof. Dr. Marc Stadler,  Helmholtz Centre for Infection Research, Braunschweig, Germany Title: “Charakterisierung der Sekundärmetabolitbildung des pathogenen Ascomyceten Hymenoscyphus pseudoalbidus und der endophytischen Mycobiota seines Wirtsbaumes Fraxinus excelsior”  

2003 - 2013                     
study of biotechnology at the Technical University of Braunschweig (focus on bioprocess engineering)

The ascomycete Hymenoscyphus pseudoalbidus was proven to be the causal agent of ash dieback in extended parts of Europe, however, virulence factors responsible for the pathogenicity of this fungus are hitherto unknown. My project will focus on the novel antimicrobially active natural product from H. pseudoalbidus that was recently isolated by me and my colleagues in preliminary work and furthermore on the exploitation of new secondary metabolites of the pathogen by using antagonistic assays as well as chemical-epigenetic methods to induce changes in fungal secondary metabolism. The cultures (from fermentations in solid and liquid media) of several strains of H. pseudoalbidus and of promising antagonists will be screened by HPLC/DAD-MS profiling and antimicrobial assays and the most promising biologically active compounds will be isolated using bioassay-guided isolation procedures using preparative chromatography and identified by NMR and MS.    



Natural Product Chemistry


Microbial Strain Collection

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