Benzalacetone synthase.
Benzalacetone synthase.
复制标题
苯甲酰酮合酶。
DOI:
10.3389/fpls.2012.00057
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发表时间:
2012
影响因子:
5.6
通讯作者:
Abe I
中科院分区:
文献类型:
--
作者:
Shimokawa Y;Morita H;Abe I
Benzalacetone synthase, from the medicinal plant Rheum palmatum (RpBAS), is a plant-specific chalcone synthase (CHS) superfamily of type III polyketide synthase (PKS). RpBAS catalyzes the one-step, decarboxylative condensation of 4-coumaroyl-CoA with malonyl-CoA to produce the C6–C4 benzalacetone scaffold. The X-ray crystal structures of RpBAS confirmed that the diketide-forming activity is attributable to the characteristic substitution of the conserved active-site “gatekeeper” Phe with Leu. Furthermore, the crystal structures suggested that RpBAS employs novel catalytic machinery for the thioester bond cleavage of the enzyme-bound diketide intermediate and the final decarboxylation reaction to produce benzalacetone. Finally, by exploiting the remarkable substrate tolerance and catalytic versatility of RpBAS, precursor-directed biosynthesis efficiently generated chemically and structurally divergent, unnatural novel polyketide scaffolds. These findings provided a structural basis for the functional diversity of the type III PKS enzymes.
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DOI:
10.1046/j.1432-1327.2001.02255.x
发表时间:
2001-06-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
Abe, I;Takahashi, Y;Noguchi, H
通讯作者:
Noguchi, H
影响因子:
5.2
作者:
Abe, Ikuro;Abe, Tsuyoshi;Noguchi, Hiroshi
通讯作者:
Noguchi, Hiroshi
影响因子:
4.3
作者:
Ma, Lan-Qing;Guo, Yan-Wu;Ye, He-Chun
通讯作者:
Ye, He-Chun
影响因子:
5.2
作者:
Abe, I;Takahashi, Y;Noguchi, H
通讯作者:
Noguchi, H
DOI:
10.1038/11553
发表时间:
1999-08-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Ferrer, JL;Jez, JM;Noel, JP
通讯作者:
Noel, JP