Histone acetyltransferase MoHat1 acetylates autophagy-related proteins MoAtg3 and MoAtg9 to orchestrate functional appressorium formation and pathogenicity in Magnaporthe oryzae

Macroautophagy/autophagy is critical for normal appressorium formation and pathogenicity of the rice blast fungus Magnaporthe oryzae, but the molecular base of autophagy linked to pathogenicity remains elusive in this or other pathogenic fungi. We found that MoHat1, a histone acetyltransferase (HAT)...

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Published in:Autophagy Vol. 15; no. 7; pp. 1234 - 1257
Main Authors: Yin, Ziyi, Chen, Chen, Yang, Jie, Feng, Wanzhen, Liu, Xinyu, Zuo, Rongfang, Wang, Jingzhen, Yang, Lina, Zhong, Kaili, Gao, Chuyun, Zhang, Haifeng, Zheng, Xiaobo, Wang, Ping, Zhang, Zhengguang
Format: Journal Article
Language:English
Published: United States Taylor & Francis 03.07.2019
Subjects:
Acetylation
appressorium
Autophagosomes - metabolism
autophagy
Autophagy - genetics
Autophagy-Related Proteins - chemistry
Autophagy-Related Proteins - genetics
Autophagy-Related Proteins - metabolism
Cell Nucleus - metabolism
Cytoplasm - enzymology
Cytoplasm - metabolism
Gene Expression Regulation, Fungal
Glycogen Synthase Kinases - genetics
Glycogen Synthase Kinases - metabolism
Golgi Apparatus - metabolism
histone acetyltransferase
Histone Acetyltransferases - chemistry
Histone Acetyltransferases - genetics
Histone Acetyltransferases - metabolism
HSP70 Heat-Shock Proteins - metabolism
Hyphae - metabolism
Magnaporthe - genetics
Magnaporthe - metabolism
Magnaporthe - pathogenicity
Magnaporthe oryzae
Oryza - microbiology
pathogenicity
Phosphorylation
Plant Diseases - microbiology
Protein Binding
Protein Processing, Post-Translational - genetics
Research Paper
Signal Transduction - genetics
Spores, Fungal - genetics
Spores, Fungal - metabolism
appressorium
pathogenicity
autophagy
Acetylation
histone acetyltransferase
ISSN:1554-8627, 1554-8635, 1554-8635
Online Access:Get full text
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Summary:Macroautophagy/autophagy is critical for normal appressorium formation and pathogenicity of the rice blast fungus Magnaporthe oryzae, but the molecular base of autophagy linked to pathogenicity remains elusive in this or other pathogenic fungi. We found that MoHat1, a histone acetyltransferase (HAT) homolog, had a role in the regulation of autophagy through the acetylation of autophagy related proteins MoAtg3 and MoAtg9. We also found that MoHat1 was subject to regulation by the protein kinase MoGsk1 that modulated the translocation of MoHat1 from the nucleus to the cytoplasm with the assistance of MoSsb1, a protein chaperone. The alternation of intracellular location affected MoHat1 in the modification of cytosolic autophagy proteins that maintained normal autophagy. Furthermore, we provided evidence linking acetylation of MoAtg3 and MoAtg9 by MoHat1 to functional appressorium development and pathogenicity. Together with the first report of MoAtg9 being subject to acetylation regulation by MoHat1, our studies depicted how MoHat1 regulated autophagy in conjunction with MoGsk1 and how normal autophagy was linked to appressorium formation and function and pathogenicity of M. oryzae. Abbreviations: A/Ala: alanine; AP: autophagosome; Atg genes/proteins: autophagy-related genes/proteins; BiFC: bimolecular fluorescence complementation; co-IP: co-immunoprecipitation; DAPI: 4ʹ, 6-diamidino-2-phenylindole; D/Asp: aspartic acid; GFP: green fluorescent protein; GSK3: glycogen synthase kinase 3; HAT: histone acetyltransferase; Hsp70: heat-shock protein 70; IH: invasive hyphae; K/Lys: lysine; MMS: methyl methanesulfonate; Mo: Magnaporthe oryzae; PAS: phagophore assembly site; PE: phosphatidylethanolamine; PtdIns3K: phosphatidylinositol 3-kinase; R/Arg: arginine; S/Ser: serine; T/Thr: threonine; TOR: target of rapamycin; WT: wild type; YFP: yellow fluorescent protein
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These authors contributed equally to this work.
ISSN:1554-8627
1554-8635
1554-8635
DOI:10.1080/15548627.2019.1580104