Diterpene cyclases and the nature of the isoprene fold.

Diterpene cyclases and the nature of the isoprene fold.
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DOI:
10.1002/prot.22751
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发表时间:
2010-08-15
影响因子:
2.9
通讯作者:
Odfield, Eric
Odfield, Eric
中科院分区:
生物学4区
文献类型:
--
作者:
Cao, Rong;Zhang, Yonghui;Mann, Francis M.;Huang, Cancan;Mukkamala, Dushyant;Hudock, Michael P.;Mead, Matthew E.;Prisic, Sladjana;Wang, Ke;Lin, Fu-Yang;Chang, Ting-Kai;Peters, Reuben J.;Odfield, Eric

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许多萜烯环化酶的结构和作用机制是已知的,但没有二萜环化酶的结构。在这里,我们提出了基于生物信息学,定点诱变,结构域交换,酶抑制和光谱学的结构模型,有助于解释二萜环化酶的结构,功能和进化的性质。细菌二萜环化酶含有120个α-螺旋和与三萜环化酶相同的保守的“QW”和DxDD基序,表明存在βγ桶结构。植物二萜环化酶具有类似的催化基序和βγ结构域,与第三个结构域α结构域一起形成αβγ结构,在H+启动的环化酶中,γ结构域中存在EDxxD样Mg 2 +/二磷酸结合基序。这些结果支持了萜环化酶结构和功能的新观点,并提示了从古老的(βγ)细菌三萜环化酶到(βγ)细菌再到(αβγ)植物二萜环化酶的进化。
The structures and mechanism of action of many terpene cyclases are known, but there are no structures of diterpene cyclases. Here, we propose structural models based on bioinformatics, site-directed mutagenesis, domain swapping, enzyme inhibition and spectroscopy that help explain the nature of diterpene cyclase structure, function, and evolution. Bacterial diterpene cyclases contain ∼20 α-helices and the same conserved “QW” and DxDD motifs as in triterpene cyclases, indicating the presence of a βγ barrel structure. Plant diterpene cyclases have a similar catalytic motif and βγ-domain structure together with a third, α-domain, forming an αβγ structure, and in H+-initiated cyclases, there is an EDxxD-like Mg2+/diphosphate binding motif located in the γ-domain. The results support a new view of terpene cyclase structure and function and suggest evolution from ancient (βγ) bacterial triterpene cyclases to (βγ) bacterial and thence to (αβγ) plant diterpene cyclases.
DOI: 10.1016/j.febslet.2006.10.018
发表时间: 2006-11-13
期刊: FEBS LETTERS
影响因子: 3.5
作者:
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期刊: BIOINFORMATICS
影响因子: 5.8
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发表时间: 1998-04-28
期刊: BIOCHEMISTRY
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DOI: 10.1111/j.1432-1033.1996.0051r.x
发表时间: 1996-11-01
期刊: EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子: --
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