2020
DOI: 10.1002/anie.202010084
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The Biosynthetic Gene Cluster for Sestermobaraenes—Discovery of a Geranylfarnesyl Diphosphate Synthase and a Multiproduct Sesterterpene Synthase from Streptomyces mobaraensis

Abstract: A biosynthetic gene cluster from Streptomyces mobaraensis encoding the first cases of a bacterial geranylfarnesyl diphosphate synthase and a type I sesterterpene synthase was identified. The structures of seven sesterterpenes produced by these enzymes were elucidated, including their absolute configurations. The enzyme mechanism of the sesterterpene synthase was investigated by extensive isotope labeling experiments.

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Cited by 46 publications
(74 citation statements)
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“…Next, we discuss in detail the biosynthesis of mangicol-type sesterterpenoids. Only a few C20/C25 terpenoids based on 5,11-bicyclic systems, such as ophiobolin, 34 , 35 cotylenin A, 36 and fusicoccadiene, 37 have been reported, 38 in contrast to those derived from 5,15-systems, such as quiannulatene, 5 , 39 sesterfisherol, 40 , 41 (+)-astellatene, 42 , 43 arathanadiene derivatives, sestermobaraenes, 44 and aspergildienes. 45 In the present study, IM8 was adopted as the simplest chemical model ( Figure 4 ).…”
Section: Resultsmentioning
confidence: 99%
“…Next, we discuss in detail the biosynthesis of mangicol-type sesterterpenoids. Only a few C20/C25 terpenoids based on 5,11-bicyclic systems, such as ophiobolin, 34 , 35 cotylenin A, 36 and fusicoccadiene, 37 have been reported, 38 in contrast to those derived from 5,15-systems, such as quiannulatene, 5 , 39 sesterfisherol, 40 , 41 (+)-astellatene, 42 , 43 arathanadiene derivatives, sestermobaraenes, 44 and aspergildienes. 45 In the present study, IM8 was adopted as the simplest chemical model ( Figure 4 ).…”
Section: Resultsmentioning
confidence: 99%
“… 6 As a result, only a few bacterial geranylfarnesyl polyprenyl synthases have been biochemically characterized, such as those involved in the biosynthesis of somaliensenes A and B, 7 atolypenes, 8 and the sestermobaraenes. 9 Marinoterpins 1 – 3 are structurally related to the aurachins, a small family of natural products bearing prenylated quinoline, 4-quinolone, or quinoline N -oxide cores. While the marinoterpins are composed of previously unknown sesterterpenoid side chains with two unusual five-membered ethers, the aurachins more commonly possess sesquiterpenoid and monoterpenoid side chains ( Figure 4 ).…”
Section: Results and Discussionmentioning
confidence: 99%
“…The 25 isotopomers of ( 13 C)-1, ( 13 C)-2, and ( 13 C)-3 were prepared enzymatically with SmTS1 from the correspondingly labelled oligoprenyl diphosphates as reported previously [1]. The compounds were obtained as mixtures that were directly analysed by GC-MS.…”
Section: Experimental Preparation Of 13 C-labelled Compounds 1-3 and mentioning
confidence: 99%
“…The sestermobaraenes A-F (1-6) and sestermobaraol (7) are a series of bacterial sesterterpenes that were recently discovered by us from the actinomycete Streptomyces mobaraensis through a genome mining approach ( Figure 1) [1]. All seven compounds are produced by a canonical terpene synthase, representing the first reported sesterterpene synthase of the classical type I from bacteria, that is characterised by an aspartate-rich motif (DDXXD) and an NSE triad (NDLXSXXXE) for binding of a trinuclear Mg 2+ cluster [2,3].…”
Section: Introductionmentioning
confidence: 99%