Fermachanneling is a way to boost secondary product yield by channeling precursors  from primary metabolism into  secondary metabolism. We have found that the primary metabolite may be directed away from something as basic as the TCA cycle (Reeves et al., 2004), or from something as unexpected as cell wall biosynthesis (Fedashchin et al., 2015). Precursor feeding can be combined with Fermachanneling to boost yields even higher (Weber et al, 2012).

Fermalogic has the earliest patents and know-how in this area  which we offer to interested partners and clients in industry desiring consulting or contract laboratory assistance including use of our experimental tools and designs.

US Patent 6,420,177  Method for strain improvement of the erythromycin-producing bacterium. Weber JM and Luu MB 2002. US Patent 6,420,177

US Patent 5,976,836  Methods and compositions for enhancing erythromycin production. Weber JM, Hessler PE, Larsen, and Luu MB 1999.

US Patent Application 20070122885.  Methods of increasing production of secondary metabolites by manipulating metabolic pathways that include methylmalonyl-CoA. Reeves AR, Weber JM, Brikun IA  2007.

US 12/614,976  Process of increasing cellular production of biologically active compounds. Weber JM, Reeves AR, Brikun IA, and Cernota WH  2003.

Random transposon mutagenesis of the Saccharopolyspora erythraea genome reveals additional genes influencing erythromycin biosynthesis.  Abstract Andrij Fedashchin, William H. Cernota, Melissa C. Gonzalez, Benjamin I. Leach, Noelle Kwan, Roy K. Wesley, J. Mark Weber. FEMS Microbiol Lett. 2015 Nov;362(22). pii: fnv180. doi: 10.1093/femsle/fnv180. Epub 2015 Oct 13. DOWNLOAD

Metabolic engineering of antibiotic-producing actinomycetes using in vitro transposon mutagenesis.  AR Reeves, JM Weber - Methods in molecular biology (Clifton, NJ), 2012 - Volume 834, 153-175, DOI: 10.1007/978-1-61779-483-4_11  DOWNLOAD

An erythromycin process improvement using the diethyl methylmalonate-responsive (Dmr) phenotype of the Saccharopolyspora erythraea mutB strain. J. Mark Weber,  William H. Cernota, Melissa C. Gonzalez, Benjamin I. Leach, Andrew R. Reeves, and Roy K. Wesley.  Applied Microbiology and Biotechnology Volume 93, Number 4 2012, 1575-1583 DOWNLOAD

Engineering of the methylmalonyl-CoA metabolite node of Saccharopolyspora erythraea for increased erythromycin production. Andrew R. Reeves, Igor A. Brikun, William H. Cernota, Benjamin I. Leach, Melissa C. Gonzalez, J. Mark Weber. Metabolic Engineering  2007 vol. 9 (3) pp. 293-303. DOWNLOAD

Effects of methylmalonyl-CoA mutase gene knockouts on erythromycin production in carbohydrate-based and oil-based fermentations of Saccharopolyspora erythraea. Reeves AR, Brikun IA, Cernota WH, Leach BI, Gonzalez MC, Weber JM. J Ind Microbiol Biotechnol. 2006 vol. 33 (7) pp. 600-609 DOWNLOAD

Engineering precursor flow for increased erythromycin production in Aeromicrobium erythreum. Andrew R. Reeves, William H. Cernota, Igor A. Brikun, Roy K. Wesley and J. Mark Weber, 2004. Metabolic Engineering, 6(4):300-312. DOWNLOAD

Patent Applications