Construction of a hybrid biocatalyst containing a covalently-linked terpyridine metal complex within a cavity of aponitrobindin.
Construction of a hybrid biocatalyst containing a covalently-linked terpyridine metal complex within a cavity of aponitrobindin.
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构建在脱硝结合素空腔内含有共价连接的三联吡啶金属配合物的杂化生物催化剂
DOI:
10.1016/j.jinorgbio.2015.12.026
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发表时间:
2016
影响因子:
3.9
通讯作者:
Hayashi
中科院分区:
文献类型:
--
作者:
Himiyama;Spaniol;Hayashi
A hybrid biocatalyst containing a metal terpyridine (tpy) complex within a rigid β-barrel protein nitrobindin (NB) is constructed. A tpy ligand with a maleimide group,N-[2-([2,2′:6′,2′′-terpyridin]-4′-yloxy)ethyl]maleimide (1), was covalently linked to Cys96 inside the cavity of NB to prepare a conjugate NB–1. Binding of Cu2 +, Zn2 +, or Co2 +ion to the tpy ligand in NB–1was confirmed by UV–vis spectroscopy and ESI–TOF MS measurements. Cu2 +-bound NB–1is found to catalyze a Diels–Alder reaction between azachalcone and cyclopentadiene in 22% yield, which is higher than that of the Cu2 +–tpy complex without the NB matrix. The results suggest that the hydrophobic cavity close to the copper active site within the NB scaffold supports the binding of the two substrates, dienophile and diene, to promote the reaction.
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影响因子:
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