Highly bioresistant, hydrophilic and rigidly linked trityl-nitroxide biradicals for cellular high-field dynamic nuclear polarization.
Highly bioresistant, hydrophilic and rigidly linked trityl-nitroxide biradicals for cellular high-field dynamic nuclear polarization.
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用于细胞高场动态核极化的高度生物抗性、亲水性和刚性连接的三苯甲基氮氧双自由基
DOI:
10.1039/d2sc04668g
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发表时间:
2022-12-07
期刊:
影响因子:
8.4
通讯作者:
中科院分区:
文献类型:
--
作者:
Cellular dynamic nuclear polarization (DNP) has been an effective means of overcoming the intrinsic sensitivity limitations of solid-state nuclear magnetic resonance (ssNMR) spectroscopy, thus enabling atomic-level biomolecular characterization in native environments. Achieving DNP signal enhancement relies on doping biological preparations with biradical polarizing agents (PAs). Unfortunately, PA performance within cells is often limited by their sensitivity to the reductive nature of the cellular lumen. Herein, we report the synthesis and characterization of a highly bioresistant and hydrophilic PA (StaPol-1) comprising the trityl radical OX063 ligated to a gem-diethyl pyrroline nitroxide via a rigid piperazine linker. EPR experiments in the presence of reducing agents such as ascorbate and in HeLa cell lysates demonstrate the reduction resistance of StaPol-1. High DNP enhancements seen in small molecules, proteins and cell lysates at 18.8 T confirm that StaPol-1 is an excellent PA for DNP ssNMR investigations of biomolecular systems at high magnetic fields in reductive environments. The new polarizing agent combines extraordinarily high bioresistance with excellent DNP performance at high magnetic fields and provides uniform DNP enhancement of 183 at 18.8 T for [13C, 15N]-ubiquitin in HeLa cell lysates.
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影响因子:
1
作者:
Barnes, A. B.;De Paepe, G.;van der Wel, P. C. A.;Hu, K. -N.;Joo, C. -G.;Bajaj, V. S.;Mak-Jurkauskas, M. L.;Sirigiri, J. R.;Herzfeld, J.;Temkin, R. J.;Griffin, R. G.
通讯作者:
Griffin, R. G.
影响因子:
2.9
作者:
Albert, Brice J.;Gao, Chukun;Barnes, Alexander B.
通讯作者:
Barnes, Alexander B.
影响因子:
4.3
作者:
Cai, Xinyi;Paioni, Alessandra Lucini;Liu, Yangping
通讯作者:
Liu, Yangping
DOI:
10.1002/anie.202114103
发表时间:
2022-03-14
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Harrabi R;Halbritter T;Aussenac F;Dakhlaoui O;van Tol J;Damodaran KK;Lee D;Paul S;Hediger S;Mentink-Vigier F;Sigurdsson ST;De Paëpe G
通讯作者:
De Paëpe G
影响因子:
64.5
作者:
Frederick KK;Michaelis VK;Corzilius B;Ong TC;Jacavone AC;Griffin RG;Lindquist S
通讯作者:
Lindquist S