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© Research
Publication : Yeast (Chichester, England)

Comparative functional analysis of the OCH1 mannosyltransferase families in Aspergillus fumigatus and Saccharomyces cerevisiae

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Yeast (Chichester, England) - 01 Aug 2010

Lambou K, Perkhofer S, Fontaine T, Latge JP

Link to Pubmed [PMID] – 20586114

Yeast 2010 Aug;27(8):625-36

Alpha1,6-linked mannans are an essential component of the Aspergillus fumigatus galactomannan, which is either GPI-anchored to the plasma membrane or covalently bound to the polysaccharide core of the cell wall. In Saccharomyces cerevisiae, the OCH1 gene encodes an alpha1,6-mannosyltransferase that initiates the synthesis of the alpha1,6 linked-mannan. In the A. fumigatus genome, four orthologous genes of Saccharomyces cerevisiae ScOCH1 gene were identified. Single deletion and the quadruple deletion mutants (Afoch1-4Delta) were constructed in A. fumigatus. No phenotype different from the wild-type strain was observed in all single and the quadruple mutants. The corresponding cDNAs of the AfOCH1-4 A. fumigatus orthologues were expressed in the S. cerevisiae Scoch1Delta mutant. Among the four orthologues, only AfOCH1 complemented the aggregation phenotype, the growth inhibition, the hypersensitivity to hygromycin and the protein glycosylation defects observed in the Scoch1Deltamutant.

http://www.ncbi.nlm.nih.gov/pubmed/20586114