Short hydrogen bonds enhance nonaromatic protein-related fluorescence

被引：37

作者：

Stephens, Amberley D. ^{[1
]}

Qaisrani, Muhammad Nawaz ^{[2
,3
,4
]}

Ruggiero, Michael T. ^{[1
,5
]}

Miron, Gonzalo Diaz ^{[6
]}

Morzan, Uriel N. ^{[2
]}

Lebrero, Mariano C. Gonzalez ^{[6
]}

Jones, Saul T. E. ^{[7
]}

Poli, Emiliano ^{[2
]}

Bond, Andrew D. ^{[8
]}

Woodhams, Philippa J. ^{[1
]}

Kleist, Elyse M. ^{[5
]}

Grisanti, Luca ^{[9
]}

Gebauer, Ralph ^{[2
]}

Zeitler, J. Axel ^{[1
]}

Credgington, Dan ^{[7
]}

Hassanali, Ali ^{[2
]}

Schierle, Gabriele S. Kaminski ^{[1
]}

机构：

[1] Univ Cambridge, Chem Engn & Biotechnol, Cambridge CB3 0AS, England

[2] Abdus Salam Int Ctr Theoret Phys, Condensed Matter & Stat Phys, I-34151 Trieste, Italy

[3] Int Sch Adv Studies SISSA, I-34136 Trieste, Italy

[4] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[5] Univ Vermont, Dept Chem, Burlington, VT 05405 USA

[6] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Inst Quim Fis Mat, Dept Quim Inorgan Analit & Quim Fis, C1428EHA, Buenos Aires, DF, Argentina

[7] Univ Cambridge, Cavevdish Lab, Cambridge CB3 0HE, England

[8] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[9] Rudjer Boskovic Inst, Div Theoret Phys, Zagreb 10000, Croatia

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2021年 / 118卷 / 21期

基金：

英国医学研究理事会; 英国惠康基金; 英国工程与自然科学研究理事会;

关键词：

short hydrogen bond; intrinsic fluorescence; ultraviolet fluorescence; DENSITY-FUNCTIONAL THEORY; OPTICAL-PROPERTIES; INTRINSIC FLUORESCENCE; MOLECULAR-DYNAMICS; PROTON; PHASE; MECHANISM; ACIDS;

D O I：

10.1073/pnas.2020389118

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fluorescence in biological systems is usually associated with the presence of aromatic groups. Here, by employing a combined experimental and computational approach, we show that specific hydrogen bond networks can significantly affect fluorescence. In particular, we reveal that the single amino acid L-glutamine, by undergoing a chemical transformation leading to the formation of a short hydrogen bond, displays optical properties that are significantly enhanced compared with L-glutamine itself. Ab initio molecular dynamics simulations highlight that these short hydrogen bonds prevent the appearance of a conical intersection between the excited and the ground states and thereby significantly decrease nonradiative transition probabilities. Our findings open the door to the design of new photoactive materials with biophotonic applications.

引用

页数：9

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