Abstract：
:Fusarium graminearum (FG) is a serious plant pathogen causing huge losses in global production of wheat and other cereals. Tri5-gene encoded trichodiene synthase is the first key enzyme for biosynthesis of trichothecene mycotoxins in FG. To further our understandings of FG metabolism which is essential for developing novel strategies for controlling FG, we conducted a comprehensive investigation on the metabolic changes caused by Tri5-deletion by comparing metabolic differences between the wild-type FG5035 and an FG strain, Tri5(-), with Tri5 deleted. NMR methods identified more than 50 assigned fungal metabolites. Combined metabonomic and quantitative RT-PCR (qRT-PCR) analyses revealed that Tri5 deletion caused significant and comprehensive metabolic changes for FG apart from mycotoxin biosynthesis. These changes involved both carbon and nitrogen metabolisms including alterations in GABA shunt, TCA cycle, shikimate pathway, and metabolisms of lipids, amino acids, inositol, choline, pyrimidine, and purine. The hexose transporter has also been affected. These findings have shown that Tri5 gene deletion induces widespread changes in FG primary metabolism and demonstrated the combination of NMR-based metabonomics and qRT-PCR analyses as a useful way to understand the systems metabolic changes resulting from a single specific gene knockout in an eukaryotic genome and thus Tri5 gene functions.
journal_name
J Proteome Resjournal_title
Journal of proteome researchauthors
Chen F,Zhang J,Song X,Yang J,Li H,Tang H,Liao YCdoi
10.1021/pr101095tsubject
Has Abstractpub_date
2011-05-06 00:00:00pages
2273-85issue
5eissn
1535-3893issn
1535-3907journal_volume
10pub_type
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