A genetically encoded photosensitizer protein facilitates the rational design of a miniature photocatalytic CO2-reducing enzyme
A genetically encoded photosensitizer protein facilitates the rational design of a miniature photocatalytic CO2-reducing enzyme
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基因编码的光敏剂蛋白有助于合理设计微型光催化二氧化碳还原酶
DOI:
10.1038/s41557-018-0150-4
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发表时间:
2018-11
期刊:
影响因子:
21.8
通讯作者:
Jiangyun Wang
中科院分区:
文献类型:
--
作者:
Xiaohong Liu;Fuying Kang;Cheng Hu;Li Wang;Zhen Xu;D;an Zheng;Weimin Gong;Yi Lu;Yanhe Ma;Jiangyun Wang
Photosensitizers, which harness light energy to upgrade weak reductants to strong reductants, are pivotal components of the natural and artificial photosynthesis machineries. However, it has proved difficult to enhance and expand their functions through genetic engineering. Here we report a genetically encoded, 27 kDa photosensitizer protein (PSP), which facilitates the rational design of miniature photocatalytic CO2-reducing enzymes. Visible light drives PSP efficiently into a long-lived triplet excited state (PSP*), which reacts rapidly with reduced nicotinamide adenine dinucleotide to generate a super-reducing radical (PSP•), which is strong enough to reduce many CO2-reducing catalysts. We determined the three-dimensional structure of PSP•at 1.8 Å resolution by X-ray crystallography. Genetic engineering enabled the site-specific attachment of a nickel–terpyridine complex and the modular optimization of the photochemical properties of PSP, the chromophore/catalytic centre distance and the catalytic centre microenvironment, which culminated in a miniature photocatalytic CO2-reducing enzyme that has a CO2/CO conversion quantum efficiency of 2.6%.
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DOI:
10.1002/anie.201607176
发表时间:
2016
期刊:
Angewandte Chemie International Edition
影响因子:
--
作者:
Li Han;Zhang Ming-Tian
通讯作者:
Zhang Ming-Tian
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
通讯作者:
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DOI:
10.1126/science.aaa2424
发表时间:
2015-02-20
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Pearson AD;Mills JH;Song Y;Nasertorabi F;Han GW;Baker D;Stevens RC;Schultz PG
通讯作者:
Schultz PG
DOI:
10.1126/science.aah6219
发表时间:
2016-11-25
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Kan SB;Lewis RD;Chen K;Arnold FH
通讯作者:
Arnold FH
DOI:
10.1126/science.1261172
发表时间:
2014-12-19
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Joh NH;Wang T;Bhate MP;Acharya R;Wu Y;Grabe M;Hong M;Grigoryan G;DeGrado WF
通讯作者:
DeGrado WF