Identification and characterization of a gene required for α1,2-mannose extension in the O-linked glycan synthesis pathway in Schizosaccharomyces pombe

Yuka Ikeda, Takao Ohashi, Naotaka Tanaka, Kaoru Takegawa

研究成果: ジャーナルへの寄稿学術誌査読

26 被引用数 (Scopus)

抄録

The KTR α1,2-mannosyltransferase gene family of Saccharomyces cerevisiae is responsible not only for outer-chain modifications of N-linked oligosaccharides but also for elongation of O-linked mannose residues. To identify genes involved in the elongation step of O-linked oligosaccharide chains in Schizosaccharomyces pombe, we characterized six genes, omh1 +-omh6+, that share significant sequence similarity to the S. cerevisiae KTR family. Six deletion strains were constructed, each carrying a single disrupted omh allele. All strains were viable, indicating that none of the omh genes was essential. Heterologous expression of a chitinase from S. cerevisiae in the omh mutants revealed that O-glycosylation of chitinase had decreased in omh1Δ cells, but not in the other mutants, indicating that the other omh genes do not appear to be required for O-glycan synthesis. Addition of the second α1,2-linked mannose residue was blocked in omh1Δ cells. An Omh1-GFP fusion protein was found to be localized in the Golgi apparatus. These results indicate that Omh1p plays a major role in extending α1,2-linked mannose in the O-glycan pathway in S. pombe.

本文言語英語
ページ(範囲)115-125
ページ数11
ジャーナルFEMS Yeast Research
9
1
DOI
出版ステータス出版済み - 2月 2009

!!!All Science Journal Classification (ASJC) codes

  • 微生物学
  • 応用微生物学とバイオテクノロジー

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