Sarah Gangl , Maik Hilgarth , Christian Spielhaupter , Frank Schneider , Christiane Herrmann , Christina Recher , Tobias Baumgartner , Martina Geier , Birgit Wassermann , Anton Glieder
{"title":"Viability assessment and biomass valorization of recombinant Komagataella phaffii","authors":"Sarah Gangl , Maik Hilgarth , Christian Spielhaupter , Frank Schneider , Christiane Herrmann , Christina Recher , Tobias Baumgartner , Martina Geier , Birgit Wassermann , Anton Glieder","doi":"10.1016/j.nbt.2025.07.005","DOIUrl":null,"url":null,"abstract":"<div><div><em>Komagataella phaffii</em> has become a key player in biotechnology used for the production of heterologous proteins with numerous GRAS notices and QPS status released in the past years. While most of these descriptions and scientific studies focus on strain engineering, products and cultivation processes, this paper provides fundamental data about the general viability of <em>K. phaffii</em> after post-production biomass treatments and co-incubations with non-sterile soil and water samples. A comparison of different <em>K. phaffii</em> strains uncovered a high thermal sensitivity for all tested strains, which was further enhanced under alkaline conditions. A rapid reduction in the viable cell number started at approx. 52 °C and terminated in a full loss of 10<sup>9</sup> viable cells per milliliter within seconds at 70 °C. Survival rates of untreated non-GMO and GMO <em>K. phaffii</em> strains in water- and soil-slurry-microcosms demonstrated that the number of viable <em>K. phaffii</em> cells decreased rapidly and comparably to a <em>Saccharomyces cerevisiae</em> reference. No mating events were detected under these environmental conditions. These findings supported assumptions that <em>K. phaffii</em> is highly specialized and not a ubiquitous microorganism as described for other yeasts. Finally, intrigued by the low survival outside optimal laboratory conditions, <em>K. phaffii</em> biomass was evaluated in mesophilic anaerobic digestion processes for energy production. Enhanced methane yields and a concomitant loss of viable <em>K. phaffii</em> cells were demonstrated.</div></div>","PeriodicalId":19190,"journal":{"name":"New biotechnology","volume":"90 ","pages":"Pages 1-12"},"PeriodicalIF":4.9000,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New biotechnology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S187167842500072X","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
引用次数: 0
Abstract
Komagataella phaffii has become a key player in biotechnology used for the production of heterologous proteins with numerous GRAS notices and QPS status released in the past years. While most of these descriptions and scientific studies focus on strain engineering, products and cultivation processes, this paper provides fundamental data about the general viability of K. phaffii after post-production biomass treatments and co-incubations with non-sterile soil and water samples. A comparison of different K. phaffii strains uncovered a high thermal sensitivity for all tested strains, which was further enhanced under alkaline conditions. A rapid reduction in the viable cell number started at approx. 52 °C and terminated in a full loss of 109 viable cells per milliliter within seconds at 70 °C. Survival rates of untreated non-GMO and GMO K. phaffii strains in water- and soil-slurry-microcosms demonstrated that the number of viable K. phaffii cells decreased rapidly and comparably to a Saccharomyces cerevisiae reference. No mating events were detected under these environmental conditions. These findings supported assumptions that K. phaffii is highly specialized and not a ubiquitous microorganism as described for other yeasts. Finally, intrigued by the low survival outside optimal laboratory conditions, K. phaffii biomass was evaluated in mesophilic anaerobic digestion processes for energy production. Enhanced methane yields and a concomitant loss of viable K. phaffii cells were demonstrated.
期刊介绍:
New Biotechnology is the official journal of the European Federation of Biotechnology (EFB) and is published bimonthly. It covers both the science of biotechnology and its surrounding political, business and financial milieu. The journal publishes peer-reviewed basic research papers, authoritative reviews, feature articles and opinions in all areas of biotechnology. It reflects the full diversity of current biotechnology science, particularly those advances in research and practice that open opportunities for exploitation of knowledge, commercially or otherwise, together with news, discussion and comment on broader issues of general interest and concern. The outlook is fully international.
The scope of the journal includes the research, industrial and commercial aspects of biotechnology, in areas such as: Healthcare and Pharmaceuticals; Food and Agriculture; Biofuels; Genetic Engineering and Molecular Biology; Genomics and Synthetic Biology; Nanotechnology; Environment and Biodiversity; Biocatalysis; Bioremediation; Process engineering.