SYM-10, Session III: Glycobiology II, Chair: Young Kug Choo (Wonkwang University)
An essential role of YlMPO1, a novel Yarrowia lipolytica homologue of Saccharomyces cerevisiae MNN4, in the mannosylphosphorylation of N- and O-linked glycans
Jeong-Nam Park, Yunkyoung Song, Seon Ah Cheon, Ohsuk Kwon, Doo-Byoung Oh, Yoshifumi Jigami, Jeong-Yoon Kim, Hyun Ah Kang
언어
영어(ENG)
URL
https://www.earticle.net/Article/A192615
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원문정보
초록
영어
Mannosylphosphorylation of N- and O-glycans, which confers negative charges on the surfaces of cells, requires the functions of both MNN4 and MNN6 in Saccharomyces cerevisiae. To identify genes relevant to mannosylphosphorylation in the dimorphic yeast Yarrowia lipolytica, the molecular functions of five Y. lipolytica genes showing significant sequence homology with S. cerevisiae MNN4 and MNN6 were investigated. A set of mutant strains in which Y. lipolytica MNN4 and MNN6 homologues were deleted underwent glycan structure analysis. In contrast to ScMNN4, the Y. lipolytica MNN4 homologue, YlMPO1, encodes a protein that lacks the long KKKKEEEE repeat domain at its C-terminus. Moreover, just a single disruption of YlMPO1 resulted in complete disappearance of the acidic sugar moiety in both the Nand O-linked glycan profiles. In contrast, even quadruple disruption of all ScMNN6 homologues, designated YlKTR1, YlKTR2, YlKTR3, and YlKTR4, resulted in no apparent reduction in acidic sugar moieties. These findings strongly indicate that YlMpo1p performs a significant role in mannosylphosphorylation in Y. lipolytica with no involvement of the Mnn6p homologues. Mutant strains harboring the YlMPO1 gene disruption may serve as useful platforms for engineering Y. lipolytica glycosylation pathways for humanized glycans without any yeast-specific acidic modifications.
저자
Jeong-Nam Park [ Department of Life Science, Chung-Ang University, Korea Research Institute of Bioscience and Biotechnology ]
Yunkyoung Song [ Department of Microbiology and Molecular Biology, Chungnam National University ]
Seon Ah Cheon [ Department of Life Science, Chung-Ang University ]
Ohsuk Kwon [ Korea Research Institute of Bioscience and Biotechnology ]
Doo-Byoung Oh [ Korea Research Institute of Bioscience and Biotechnology ]
Yoshifumi Jigami [ National Institute of Advanced Industrial Science and Technology, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan ]
Jeong-Yoon Kim [ Department of Microbiology and Molecular Biology, Chungnam National University ]
Hyun Ah Kang [ Department of Life Science, Chung-Ang University ]
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.