Light driven ultrafast electron transfer in oxidative redding of Green Fluorescent Proteins.
Light driven ultrafast electron transfer in oxidative redding of Green Fluorescent Proteins.
复制标题
DOI:
10.1038/srep01580
复制
发表时间:
2013
影响因子:
4.6
通讯作者:
Pal SK
中科院分区:
文献类型:
--
作者:
Saha R;Verma PK;Rakshit S;Saha S;Mayor S;Pal SK
Fluorescent proteins undergoing green to red (G/R) photoconversion have proved to be potential tools for investigating dynamic processes in living cells and for photo-localization nanoscopy. However, the photochemical reaction during light induced G/R photoconversion of fluorescent proteins remains unclear. Here we report the direct observation of ultrafast time-resolved electron transfer (ET) during the photoexcitation of the fluorescent proteins EGFP and mEos2 in presence of electron acceptor, p-benzoquinone (BQ). Our results show that in the excited state, the neutral EGFP chromophore accepts electrons from an anionic electron donor, Glu222, and G/R photoconversion is facilitated by ET to nearby electron acceptors. By contrast, mEos2 fails to produce the red emitting state in the presence of BQ; ET depletes the excited state configuration en route to the red-emitting fluorophore. These results show that ultrafast ET plays a pivotal role in multiple photoconversion mechanisms and provide a method to modulate the G/R photoconversion process.
登录
查看更多内容
影响因子:
16
作者:
Mizuno, H;Mal, TK;Miyawakil, A
通讯作者:
Miyawakil, A
影响因子:
3.5
作者:
Carpentier, Philippe;Violot, Sebastien;Bourgeois, Dominique
通讯作者:
Bourgeois, Dominique
影响因子:
56.9
作者:
Patterson, GH;Lippincott-Schwartz, J
通讯作者:
Lippincott-Schwartz, J
影响因子:
2.9
作者:
Hanson, GT;McAnaney, TB;Remington, SJ
通讯作者:
Remington, SJ
影响因子:
8
作者:
Saxena, AM;Udgaonkar, JB;Krishnamoorthy, G
通讯作者:
Krishnamoorthy, G