- Structural analysis of N-/O-glycans assembled on proteins in yeasts
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Eun Jung Thak , Jungho Kim , Dong-Jik Lee , Jeong Yoon Kim , Hyun Ah Kang
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J. Microbiol. 2018;56(1):11-23. Published online January 4, 2018
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DOI: https://doi.org/10.1007/s12275-018-7468-x
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Abstract
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Protein glycosylation, the most universal and diverse posttranslational
modification, can affect protein secretion, stability,
and immunogenicity. The structures of glycans attached
to proteins are quite diverse among different organisms and
even within yeast species. In yeast, protein glycosylation plays
key roles in the quality control of secretory proteins, and particularly
in maintaining cell wall integrity. Moreover, in pathogenic
yeasts, glycans assembled on cell-surface glycoproteins
can mediate their interactions with host cells. Thus, a
comprehensive understanding of protein glycosylation in various
yeast species and defining glycan structure characteristics
can provide useful information for their biotechnological
and clinical implications. Yeast-specific glycans are a target
for glyco-engineering; implementing human-type glycosylation
pathways in yeast can aid the production of recombinant
glycoproteins with therapeutic potential. The virulenceassociated
glycans of pathogenic yeasts could be exploited
as novel targets for antifungal agents. Nowadays, several glycomics
techniques facilitate the generation of species- and
strain-specific glycome profiles and the delineation of modified
glycan structures in mutant and engineered yeast cells.
Here, we present the protocols employed in our laboratory
to investigate the N- and O-glycan chains released from purified
glycoproteins or cell wall mannoproteins in several
yeast species.
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Citations
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- Functional Characterization of Extracellular Chitinase Encoded by the YlCTS1 Gene in a Dimorphic Yeast Yarrowia lipolytica
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Jeong-Nam Park , Chang Pyo Han , Dong-Jik Lee , Seon Ah Cheon , Hyun Ah Kang
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J. Microbiol. 2014;52(4):284-291. Published online March 29, 2014
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DOI: https://doi.org/10.1007/s12275-014-4070-8
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Abstract
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The hemiascomycetes yeast Yarrowia lipolytica is a dimorphic yeast with alternating yeast and mycelia forms. Bioinformatic analysis revealed the presence of three putative chitinase genes, YlCTS1, YlCTS2, and YlCTS3, in the Y. lipolytica genome. Here, we demonstrated that the protein of YlCTS1 (YlCts1p), which contains an N-terminal secretion signal peptide, a long C-terminal Ser/Thr-rich domain, and
a chitin-binding domain, is a homologue to Saccharomyces cerevisiae chitinase 1 (ScCts1p). Deletion of YlCTS1 remarkably reduced extracellular endochitinase activity in the culture supernatant of Y. lipolytica and enhanced cell aggregation,
suggesting a role of YlCts1p in cell separation as ScCts1p does in S. cerevisiae. However, loss of YlCts1p function did not affect hyphal formation induced by fetal bovine serum addition. The mass of YlCts1p was dramatically decreased
by jack bean α-mannosidase digestion but not by PNGase F treatment, indicating that YlCts1p is modified only by Omannosylation without N-glycosylation. Moreover, the O-glycan profile of YlCts1p was identical to that of total cell wall
mannoproteins, supporting the notion that YlCts1p can be used as a good model for studying O-glycosylation in this dimorphic yeast.
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Citations
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- Advancing Ultrasensitive, Drift-Correcting Dual Floating Gate Organic Electrochemical Transistors for Yeast Sensing
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Davide Gottardi, Lorenzo Siroli, Lucia Vannini, Francesca Patrignani, Rosalba Lanciotti Trends in Food Science & Technology.2021; 115: 74. CrossRef - Functional analysis of recombinant human and Yarrowia lipolytica O-GlcNAc transferases expressed in Saccharomyces cerevisiae
Hye Ji Oh, Hye Yun Moon, Seon Ah Cheon, Yoonsoo Hahn, Hyun Ah Kang Journal of Microbiology.2016; 54(10): 667. CrossRef
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