Oliver Spadiut


Affiliation: Vienna University of Technology
Country: Austria


  1. Humer D, Spadiut O. Improving the Performance of Horseradish Peroxidase by Site-Directed Mutagenesis. Int J Mol Sci. 2019;20: pubmed publisher
  2. Wurm D, Spadiut O. Purification of Recombinant Glycoproteins from Pichia pastoris Culture Supernatants. Methods Mol Biol. 2019;1923:343-350 pubmed publisher
    ..Here, we describe a fast and efficient two-step chromatography strategy, where both steps are operated in flow-through mode, to purify recombinant glycoproteins from P. pastoris culture supernatants. ..
  3. Wurm D, Spadiut O. Efficient Development of a Mixed Feed Process for Pichia pastoris. Methods Mol Biol. 2019;1923:323-333 pubmed publisher
    ..Here, we present an efficient strategy comprising only one experiment to determine the settings of such a mixed feed system based on the physiology of the respective yeast strain. ..
  4. Quehenberger J, Reichenbach T, Baumann N, Rettenbacher L, Divne C, Spadiut O. Kinetics and Predicted Structure of a Novel Xylose Reductase from Chaetomium thermophilum. Int J Mol Sci. 2019;20: pubmed publisher
    ..Despite the outstanding thermophilicity of its host the enzyme is, however, not thermostable. ..
  5. Kopp J, Slouka C, Strohmer D, Kager J, Spadiut O, Herwig C. Inclusion Body Bead Size in E. coli Controlled by Physiological Feeding. Microorganisms. 2018;6: pubmed publisher
    ..Furthermore, production of distinct inclusion body size may be interesting for application as a biocatalyst and nanoparticulate material. ..
  6. Pekarsky A, Veiter L, Rajamanickam V, Herwig C, Grünwald Gruber C, Altmann F, et al. Production of a recombinant peroxidase in different glyco-engineered Pichia pastoris strains: a morphological and physiological comparison. Microb Cell Fact. 2018;17:183 pubmed publisher
    ..Man5GlcNAc2 glycosylated HRP C1A production is feasible, yields active protein similar to the wild type strain, but thermal stability of HRP C1A is negatively affected by reduced glycosylation. ..
  7. Hausjell J, Weissensteiner J, Molitor C, Halbwirth H, Spadiut O. E. coli HMS174(DE3) is a sustainable alternative to BL21(DE3). Microb Cell Fact. 2018;17:169 pubmed publisher
    ..Especially for large scale production of industrial enzymes cheap substrates are essential. Besides cost factors, the strategy allows straight forward adjustment of specific product titers by variation of the lactose feed rate. ..
  8. Humer D, Spadiut O. Wanted: more monitoring and control during inclusion body processing. World J Microbiol Biotechnol. 2018;34:158 pubmed publisher
    ..In this mini review we describe current efforts to introduce more monitoring and control in IB processes, focusing on the refolding step, and thus generate process understanding and knowledge. ..
  9. Capone S, Horvat J, Herwig C, Spadiut O. Development of a mixed feed strategy for a recombinant Pichia pastoris strain producing with a de-repression promoter. Microb Cell Fact. 2015;14:101 pubmed publisher
    ..pastoris de-repression strain. Our methodological approach of designing mixed-feed strategies based on physiological strain characterization using dynamic experiments proved to be beneficial. ..

More Information


  1. Spadiut O, Rossetti L, Dietzsch C, Herwig C. Purification of a recombinant plant peroxidase produced in Pichia pastoris by a simple 2-step strategy. Protein Expr Purif. 2012;86:89-97 pubmed publisher
    ..Combining a hydrophobic charge induction chromatography operated in flowthrough mode and a size-exclusion chromatography, we were able to purify rHRP more than 12-fold from a specific activity of 80U/mg to more than 1000U/mg. ..
  2. Krainer F, Capone S, Jäger M, Vogl T, Gerstmann M, Glieder A, et al. Optimizing cofactor availability for the production of recombinant heme peroxidase in Pichia pastoris. Microb Cell Fact. 2015;14:4 pubmed publisher
    ..pastoris can be easily enhanced by supplementation of the cultivation medium with hemin. Thereby, secreted apo-species of the target protein are effectively saturated with cofactor, maximizing the yield of target enzyme activity. ..
  3. Slouka C, Wurm D, Brunauer G, Welzl Wachter A, Spadiut O, Fleig J, et al. A Novel Application for Low Frequency Electrochemical Impedance Spectroscopy as an Online Process Monitoring Tool for Viable Cell Concentrations. Sensors (Basel). 2016;16: pubmed
    ..It is shown that impedance spectroscopy at low frequencies is a powerful tool for cultivation monitoring. ..
  4. Hausjell J, Halbwirth H, Spadiut O. Recombinant production of eukaryotic cytochrome P450s in microbial cell factories. Biosci Rep. 2018;38: pubmed publisher
    ..This review describes current strategies for expression of P450s in the microbial cell factories Escherichia coli, Saccharomyces cerevisiae, and Pichia pastoris. ..
  5. Capone S, Ćorajević L, Bonifert G, Murth P, Maresch D, Altmann F, et al. Combining Protein and Strain Engineering for the Production of Glyco-Engineered Horseradish Peroxidase C1A in Pichia pastoris. Int J Mol Sci. 2015;16:23127-42 pubmed publisher
    ..This variant shows considerable catalytic activity and thermal stability and is less glycosylated, which might allow more controlled and efficient conjugation to antibodies and lectins. ..
  6. Kopp J, Slouka C, Ulonska S, Kager J, Fricke J, Spadiut O, et al. Impact of Glycerol as Carbon Source onto Specific Sugar and Inducer Uptake Rates and Inclusion Body Productivity in E. coli BL21(DE3). Bioengineering (Basel). 2017;5: pubmed publisher
    ..Additionally, it was shown that glycerol has beneficial effects on viability of cells and on productivity of the recombinant protein compared to glucose. ..
  7. Hofer A, Herwig C, Spadiut O. Lecithin is the key material attribute in soy bean oil affecting filamentous bioprocesses. AMB Express. 2018;8:90 pubmed publisher
    ..Thus, over-dosage and potential resulting negative impacts on fungal growth and productivity can be omitted. ..
  8. Rajamanickam V, Metzger K, Schmid C, Spadiut O. A novel bi-directional promoter system allows tunable recombinant protein production in Pichia pastoris. Microb Cell Fact. 2017;16:152 pubmed publisher
    ..This bi-directional promoter system offers a high degree of freedom for bioprocess design and development, making bi-directional promoters in P. pastoris highly attractive for recombinant protein production. ..
  9. Eggenreich B, Rajamanickam V, Wurm D, Fricke J, Herwig C, Spadiut O. A combination of HPLC and automated data analysis for monitoring the efficiency of high-pressure homogenization. Microb Cell Fact. 2017;16:134 pubmed publisher
  10. Gundinger T, Spadiut O. A comparative approach to recombinantly produce the plant enzyme horseradish peroxidase in Escherichia coli. J Biotechnol. 2017;248:15-24 pubmed publisher
    ..coli allowing straight forward screening for improved variants, and finally produce these variants as IB in high amounts, which are then refolded. ..
  11. Rajamanickam V, Wurm D, Slouka C, Herwig C, Spadiut O. A novel toolbox for E. coli lysis monitoring. Anal Bioanal Chem. 2017;409:667-671 pubmed publisher
    ..coli lysis in a fast and reliable manner. We are convinced that this toolbox will not only facilitate E. coli bioprocess monitoring but will also allow enhanced process control in the future. ..
  12. Wurm D, Veiter L, Ulonska S, Eggenreich B, Herwig C, Spadiut O. The E. coli pET expression system revisited-mechanistic correlation between glucose and lactose uptake. Appl Microbiol Biotechnol. 2016;100:8721-9 pubmed publisher
    ..We believe that this mechanistic model might serve as platform knowledge for E. coli. ..
  13. Eggenreich B, Scholz E, Wurm D, Forster F, Spadiut O. The production of a recombinant tandem single chain fragment variable capable of binding prolamins triggering celiac disease. BMC Biotechnol. 2018;18:30 pubmed publisher
    ..The high binding specificity of tscFv towards prolamin-containing grains makes this novel molecule a valuable candidate to support patients suffering from CD in the future. ..
  14. Gmeiner C, Saadati A, Maresch D, Krasteva S, Frank M, Altmann F, et al. Development of a fed-batch process for a recombinant Pichia pastoris Δoch1 strain expressing a plant peroxidase. Microb Cell Fact. 2015;14:1 pubmed publisher
    ..In terms of productivity and product purity a temperature of 20°C was highly beneficial. In summary, we determined cultivation conditions for a recombinant P. pastoris Δoch1 strain allowing high productivity and product purity. ..
  15. Wurm D, Quehenberger J, Mildner J, Eggenreich B, Slouka C, Schwaighofer A, et al. Teaching an old pET new tricks: tuning of inclusion body formation and properties by a mixed feed system in E. coli. Appl Microbiol Biotechnol. 2018;102:667-676 pubmed publisher