The Journal of General and Applied Microbiology
Online ISSN : 1349-8037
Print ISSN : 0022-1260
ISSN-L : 0022-1260
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Inhibition of histone deacetylase causes reduction of appressorium formation in the rice blast fungus Magnaporthe oryzae
Masumi IzawaOsamu TakekawaTsutomu ArieTohru TeraokaMinoru YoshidaMakoto KimuraTakashi Kamakura
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2009 Volume 55 Issue 6 Pages 489-498

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Abstract

Post-translational modifications (PTMs) are important for cellular functions. The regulation of histone acetyltransferases (HATs) and histone deacetylases (HDACs) is one of important PTMs for epigenetic control, protein activity and protein stability. The regulation of acetylation of the N-terminal histone tails of core histone affects gene expression. Two class I HDAC genes and two class II HDAC genes have been identified in the Magnaporthe oryzae genome. Treatment with Rpd3/Hda1 family (classical) HDAC inhibitor inhibited the appressorium differentiation of M. oryzae. Treatment with trichostatin A, a classical HDAC inhibitor, also decreased pathogenesis. Furthermore, analyses of HDAC mutants indicated that MoHda1 and MoHos2 were required for vegetative growth and conidiation, and MoHos2 was required for appressorium formation. Disruption MoRPD3 was unsuccessful, as in the case with Aspergillus nidulans RpdA. These data indicated that HDACs have important roles in the asexual differentiation of M. oryzae.

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© 2009 by The Applied Microbiology, Molecular and Cellular Biosciences Research Foundation
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