Engineering Production of a Novel Diterpene Synthase Precursor in Nicotiana benthamiana.
Engineering Production of a Novel Diterpene Synthase Precursor in Nicotiana benthamiana.
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DOI:
10.3389/fpls.2021.757186
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发表时间:
2021
影响因子:
5.6
通讯作者:
Graham IA
中科院分区:
文献类型:
--
作者:
Forestier ECF;Brown GD;Harvey D;Larson TR;Graham IA
Diterpene biosynthesis commonly originates with the methylerythritol phosphate (MEP) pathway in chloroplasts, leading to the C20 substrate, geranylgeranyl pyrophosphate (GGPP). The previous work demonstrated that over-expression of genes responsible for the first and last steps in the MEP pathway in combination with GERANYLGERANYL PYROPHOSPHATE SYNTHASE (GGPPS) and CASBENE SYNTHASE (CAS) is optimal for increasing flux through to casbene in Nicotiana benthamiana. When the gene responsible for the last step in the MEP pathway, 4-HYDROXY-3-METHYLBUT-2-ENYL DIPHOSPHATE REDUCTASE (HDR), is removed from this combination, casbene is still produced but at lower amounts. Here, we report the unexpected finding that this reduced gene combination also results in the production of 16-hydroxy-casbene (16-OH-casbene), consistent with the presence of 16-hydroxy-geranylgeranyl phosphate (16-OH-GGPP) in the same material. Indirect evidence suggests the latter is formed as a result of elevated levels of 4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP) caused by a bottleneck at the HDR step responsible for conversion of HMBPP to dimethylallyl pyrophosphate (DMAPP). Over-expression of a GERANYLLINALOOL SYNTHASE from Nicotiana attenuata (NaGLS) produces 16-hydroxy-geranyllinalool (16-OH-geranyllinalool) when transiently expressed with the same reduced combination of MEP pathway genes in N. benthamiana. This work highlights the importance of pathway flux control in metabolic pathway engineering and the possibility of increasing terpene diversity through synthetic biology.
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影响因子:
13.8
作者:
Forestier ECF;Czechowski T;Cording AC;Gilday AD;King AJ;Brown GD;Graham IA
通讯作者:
Graham IA
影响因子:
3.9
作者:
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通讯作者:
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影响因子:
2.1
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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作者:
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通讯作者:
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