Abstract：
:Valerophenone synthase (VPS) is a polyketide synthase that catalyzes the formation of the phloroglucinol derivatives in the synthesis of the bitter acids in hop (Humulus lupulus). The reaction uses isovaleryl-CoA or isobutyryl-CoA, but otherwise it is identical to that of the chalcone synthase in flavonoid biosynthesis. Our study showed that chalcone synthase can perform the function of VPS, but not perfectly, because the majority of the reactions terminated after two condensation reactions (products: 4-hydroxy-2-pyrone derivatives). The same experiments with stilbene synthase yielded exclusively the 4-hydroxy-2-pyrone derivatives, not the products expected from three condensation reactions. The results are discussed in the context of the functional diversity and evolution in the family of CHS-related polyketide synthases.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Zuurbier KW,Leser J,Berger T,Hofte AJ,Schröder G,Verpoorte R,Schröder Jdoi
10.1016/s0031-9422(98)00346-xsubject
Has Abstractpub_date
1998-12-01 00:00:00pages
1945-51issue
7eissn
0031-9422issn
1873-3700pii
S0031-9422(98)00346-Xjournal_volume
49pub_type
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