Article
Biotechnology & Applied Microbiology
S. Y. Filkin, N. Chertova, S. S. Zatsepin, E. G. Sadykhov, A. N. Fedorov, A. Lipkin
Summary: A producer strain of Komagataella phaffii of recombinant beluga whale chymosin was obtained with a productivity of 80 mg/L, but its high nonspecific proteolytic activity impairs its properties and rules out its use in the food industry.
APPLIED BIOCHEMISTRY AND MICROBIOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Fidan Erden-Karaoglan, Mert Karaoglan
Summary: This study investigated the applicability of heterologous yeast promoters in Pichia pastoris, and found inducible and constitutive regulation modes as well as the optimal carbon sources for these promoters. The study also determined the DNA region with the highest activity for all promoters through promoter deletion analysis.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Biology
Binyang Deng, Yu Yue, Jun Yang, Mingjun Yang, Qiong Xing, Hang Peng, Fei Wang, Ming Li, Lixin Ma, Chao Zhai
Summary: In this study, highly glycosylated IsPETase enzyme was obtained by controlling the glycosylation modification of PETase in Pichia pastoris, improving the enzyme's specific activity and thermostability. The partially deglycosylated IsPETase still maintained high thermostability and could completely degrade PET flakes at 50 degrees C. This study provides a strategy to modulate the thermostable IsPETase through glycosylation engineering, promoting PET biodegradation.
COMMUNICATIONS BIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Liangtian Miao, Yin Li, Taicheng Zhu
Summary: The study demonstrated the feasibility of producing beta-alanine from methanol using Pichia pastoris, achieving a high yield of 5.6g/L through optimizing enzyme activity and carbon source supply. This is the highest metabolite production titer reached in P. pastoris using methanol as the substrate.
BIORESOURCES AND BIOPROCESSING
(2021)
Article
Biochemistry & Molecular Biology
Tianpeng Chen, Shimeng Wang, Huanqing Niu, Guanjia Yang, Sinan Wang, Yuqi Wang, Chaowei Zhou, Bin Yu, Pengpeng Yang, Wenjun Sun, Dong Liu, Hanjie Ying, Yong Chen
Summary: A biofilm-based fermentation system was constructed in P. pastoris by combining the surface display of beta-galactosidase and biofilm formation. The results showed a catalytic conversion rate of 50.3% for GOS with a maximum enzyme activity of 5125 U/g. This study provides a basis for developing biofilm-based surface display methods in P. pastoris.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Maria Carmela Bonaccorsi di Patti, Antimo Cutone, Zuzana Pakanova, Marek Nemcovic, Peter Barath, Giovanni Musci
Summary: Ceruloplasmin is crucial for iron metabolism in vertebrates, and the production of high-quality recombinant human ceruloplasmin represents a significant advancement. Further improvement in productivity and glycoengineering is necessary for potential therapeutic use in aceruloplasminemia patients.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Microbiology
Marc Christian Hess, Marvin Grollius, Valentin Duhay, Simon Koopmeiners, Svenja Bloess, Gabriele Fischer von Mollard
Summary: The study demonstrated the heterologous expression of four fungal LAAOs in Pichia pastoris, showing that the enzymatic activity of some enzymes for substrate conversion is influenced by N-glycosylation, with one enzyme's activity depending on specific N-glycosylation modification.
Article
Biochemistry & Molecular Biology
Mirelle Flores-Villegas, Corinna Rebnegger, Viktoria Kowarz, Roland Prielhofer, Diethard Mattanovich, Brigitte Gasser
Summary: The promoter of the high-affinity glucose transporter Gth1 (PGTH1) was improved through random and rational engineering, resulting in stronger induction in glucose-limitation and enabling methanol-free production processes. Single point mutations and key promoter segments were identified, leading to a library of novel promoter variants with significantly higher activity. The study also discovered nucleotide positions and corresponding TFBS that distinguish between glycerol- and glucose-mediated repression of the native promoter.
NUCLEIC ACIDS RESEARCH
(2023)
Article
Pharmacology & Pharmacy
Yoshiki Eto, Narcis Saubi, Pau Ferrer, Joan Joseph-Munne
Summary: This study established a method for producing chimeric HPV-HIV L1P18 protein in Pichia pastoris, achieving VLPs with a purity of 96% using a combination of purification techniques. This work contributes towards the development of an alternative platform for production of a bivalent vaccine against HPV and HIV.
Article
Biotechnology & Applied Microbiology
Dariusz Abramczyk, Maria del Carmen Sanchez Olmos, Adan Andres Ramirez Rojas, Daniel Schindler, Daniel Robertson, Stephen McColm, Adele L. Marston, Paul N. Barlow
Summary: A linear nanochromosome has been developed in K. phaffii, allowing for stable integration of multiple foreign genes and potentially facilitating cost-effective biomanufacturing.
MICROBIAL CELL FACTORIES
(2023)
Article
Multidisciplinary Sciences
Masahiro Tominaga, Kenta Nozaki, Daisuke Umeno, Jun Ishii, Akihiko Kondo
Summary: The authors have introduced a workflow for parallel screening, selection and evolution of yeast genetic switches, aiming to address the complexity in eukaryotic genetic switch design.
NATURE COMMUNICATIONS
(2021)
Article
Biotechnology & Applied Microbiology
Nai-Xin Lin, Rui-Zhen He, Yan Xu, Xiao-Wei Yu
Summary: The robust P. pastoris mutant demonstrates higher expression levels of not only lipase but also other heterogeneous proteins under methanol induction conditions. The mutant shows lower intracellular ROS levels compared to the WT. RNA-seq analysis revealed upregulation of key pathways related to antioxidant, MAPK pathway, ergosterol synthesis pathway, transcription factors, and the peroxisome pathway in the robust mutant, contributing to its enhanced oxidative stress tolerance and high heterologous protein expression efficiency.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Biotechnology & Applied Microbiology
Lina Heistinger, Juliane C. Dohm, Barbara G. Paes, Daniel Koizar, Christina Troyer, Oezge Ata, Teresa Steininger-Mairinger, Diethard Mattanovich
Summary: By characterizing 25 natural isolates from all seven described Komagataella species, this study identified strains with differences in tolerance to high pH, high temperature, and growth on xylose. The genotypic and phenotypic diversity within this genus provides a basis for utilizing neglected Komagataella strains with interesting characteristics and understanding genetic determinants for improved growth and stress tolerance.
MICROBIAL CELL FACTORIES
(2022)
Article
Microbiology
Yasmin Nabilah Binti Mohd Fauzee, Yuki Yoshida, Yukio Kimata
Summary: In eukaryotic species, dysfunction of the endoplasmic reticulum (ER) triggers a cellular protective response called the unfolded protein response (UPR). This response is initiated by ER stress sensors, including Ire1, which splices and matures mRNA encoding the transcription factor Hac1. Through analyzing the methylotrophic yeast Pichia pastoris, researchers discovered a previously unknown function of Ire1. They found that Ire1 not only regulates UPR but also controls protein aggregation and the heat shock response, conferring heat stress resistance to the cells.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Roghayeh Shirvani, Alexander Bartik, Gustavo A. S. Alves, Daniel Garcia de Otazo Hernandez, Stefan Mueller, Karin Foettinger, Matthias G. Steiger
Summary: Carbon and nitrogen are important elements that need to be efficiently regenerated in a circular economy. Gasification technology can utilize challenging waste streams and produce syngas that can be further processed into various useful products. This study focuses on recovering nitrogen from gasification byproduct gas cleaning to form protein-rich yeast biomass.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)