A MYST family histone acetyltransferase, MoSAS3, is required for development and pathogenicity in the rice blast fungus

Molecular Plant Pathology
Akanksha DubeyJunhyun Jeon

Abstract

Histone acetylation has been established as a principal epigenetic regulatory mechanism in eukaryotes. Sas3, a histone acetyltransferase belonging to the largest family of acetyltransferase, MYST, is the catalytic subunit of a conserved histone acetyltransferase complex. To date, the functions of Sas3 and its orthologues have been extensively studied in yeast, humans and flies in relation to global acetylation and transcriptional regulation. However, its precise impact on development and pathogenicity in fungal plant pathogens has yet to be elucidated. Considering the importance of Sas3 in H3K14 acetylation, here we investigate the roles of its orthologue in the rice blast fungus, Magnaporthe oryzae (Pyricularia oryzae). Unlike a previously reported Sas3 deletion in yeast, which led to no remarkable phenotypic changes, we found that MoSAS3 deletion alone had a profound effect on fungal growth and development, including asexual reproduction, germination and appressorium formation in M. oryzae. Such defects in pre-penetration development resulted in complete loss of pathogenicity in the deletion mutant. Furthermore, genetic analysis of MoSAS3 and MoGCN5 encoding a Gcn5-related N-acetyltransferase family histone acetyltransferase ...Continue Reading

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Methods Mentioned

BETA
histone acetylation
acetylation
PCR

Software Mentioned

Cufflinks
R
Leica Application Suite
PSORT
ImageJ
topGO
BLAST
SignalP

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