Delocalization-Enhanced Long-Range Energy Transfer between Cryptophyte Algae PE545 Antenna Proteins

被引：30

作者：

Hossein-Nejad, Hoda ^{[3
]}

Curutchet, Carles ^{[4
,5
]}

Kubica, Aleksander ^{[1
,2
]}

Scholes, Gregory D. ^{[1
,2
]}

机构：

[1] Univ Toronto, Inst Opt Sci, Lash Miller Chem Labs, Toronto, ON M5S 3H6, Canada

[2] Univ Toronto, Ctr Quantum Informat & Quantum Control, Toronto, ON M5S 3H6, Canada

[3] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[4] Univ Girona, Inst Quim Computac, Girona 17071, Spain

[5] Univ Girona, Dept Quim, Girona 17071, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2011年 / 115卷 / 18期

基金：

加拿大自然科学与工程研究理事会;

关键词：

QUANTUM COHERENCE; EXCITATION TRANSFER; DYNAMICS; PHYCOBILINS; SYSTEM; MODEL; FIELD;

D O I：

10.1021/jp108397a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We study the dynamics of interprotein energy transfer in a cluster, consisting of four units of phycoerythrin 545 (PE545) antenna proteins via a hybrid quantum-classical approach. Long-range exciton transport is viewed as a random walk in which the hopping probabilities are determined from a quantum theory. We apply two different formulations of the exciton transport problem to obtain the hopping probabilities, and find that a theory that regards energy transfer as relaxations among the excitonic eigenstates mediated by the vibrational bath, predicts the fastest dynamics. Our results indicate that persistent exciton delocalization is an important implication of the quantum nature of energy transfer on a multiprotein length scale, and that a hybrid quantum-classical approach is a viable starting point in studies of long-range energy transfer in condensed phase biological systems.

引用

页码：5243 / 5253

页数：11

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