RT Journal Article SR Electronic(1) A1 Oka, Takuji A1 Hamaguchi, Tetsu A1 Sameshima, Yuka A1 Goto, Masatoshi A1 Furukawa, KensukeYR 2004 T1 Molecular characterization of protein O-mannosyltransferase and its involvement in cell-wall synthesis in Aspergillus nidulans JF Microbiology, VO 150 IS 6 SP 1973 OP 1982 DO https://doi.org/10.1099/mic.0.27005-0 PB Microbiology Society, SN 1465-2080, AB Protein O-glycosylation is essential for protein modification and plays important roles in eukaryotic cells. O-Mannosylation of proteins occurs in the filamentous fungus Aspergillus. The structure and function of the pmtA gene, encoding protein O-d-mannosyltransferase, which is responsible for the initial O-mannosylation reaction in Aspergillus nidulans, was characterized. Disruption of the pmtA gene resulted in the reduction of in vitro protein O-d-mannosyltransferase activity to 6 % of that of the wild-type strain and led to underglycosylation of an extracellular glucoamylase. The pmtA disruptant exhibited abnormal cell morphology and alteration in carbohydrate composition, particularly reduction in the skeletal polysaccharides in the cell wall. The results indicate that PmtA is required for the formation of a normal cell wall in A. nidulans., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.27005-0