Aspergillus flavus infects various crops with aflatoxins,and leads to aspergillosis *** is important to discover the elusive regulatory mechanism underlying the virulence of *** study revealed that the Set2 histone me...
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Aspergillus flavus infects various crops with aflatoxins,and leads to aspergillosis *** is important to discover the elusive regulatory mechanism underlying the virulence of *** study revealed that the Set2 histone methyltransferase family,AshA and SetB,involves in morphogenesis and mycotoxin *** ChIP-seq analysis found that Set2 histone methyltransferase regulates fungal development and aflatoxin biosynthesis by regulating related transcriptional factors,including the chromatin region of the sntB,an important transcriptional ***,sntB gene deletion(ΔsntB),complementary(Com-sntB),and HA tag fused to sntB(sntB-HA) strains were constructed by using the homologous recombination method,*** results revealed that deletion of sntB inhibited the processes of mycelia growth,conidial production,sclerotia formation,aflatoxin synthesis,and ability to colonize host compared to wild type(WT),and the defective phenotype of knockout strain ΔsntB could be restored in its complementary strain *** immunoprecipitation sequencing(ChIP-seq) of sntB-HA and WT and RNA sequencing(RNA-seq) of ΔsntB and WT strains revealed that SntB played key roles in oxidative stress response of *** function of catC(encode a catalase) gene was further analyzed based on the integration results of ChIP-seq and *** ?sntB strain,the relative expression level of catC was significantly higher than in WT strain,while a secretory lipase encoding gene(G4B8408359) was *** the stress of oxidant menadione sodium bisulfite(MSB),the deletion of sntB obvious down-regulated the expression level of *** deletion of catC gene,the mycelia growth,conidial production,and sclerotia formation were inhibited,while ROS level and aflatoxin production were increased compared to the WT *** also showed that the inhibition rate of MSB to ΔcatC strain was significantly lower than that of WT group and AFB1 yield
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