Ultrafast energy transfer pathways in R-phycoerythrin from Polysiphonia urceolata

doi:10.1007/s11120-011-9708-3

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	Ultrafast energy transfer pathways in R-phycoerythrin from Polysiphonia urceolata
	Chen, Hailong 1; Dang, Wei 1; Xie, Jie 2; Zhao, Jingquan 2; Weng, Yuxiang 1
刊名	PHOTOSYNTHESIS RESEARCH
	2012-03-01
卷号	111 期号:1-2 页码:81-86
关键词	R-phycoerythrin Ultrafast Energy Transfer Time-resolved Spectroscopy Polysiphonia Urceolata
ISSN号	0166-8595
DOI	10.1007/s11120-011-9708-3
英文摘要	Energy transfer (ET) processes between chromophores in R-phycoerythrin (R-PE) from Polysiphonia urceolata were studied by use of ultrafast spectroscopic methods. Several primary ET pathways were elaborated. A fluorescence decay component with a time constant of several hundred picoseconds observed by streak camera is tentatively assigned to the reversible formation of exciton traps between alpha 84 and beta 84 pigment pairs. In order to investigate much faster ET processes in R-PE, a noncollinear optical parametric amplifier based femtosecond time-resolved transient fluorescence spectrometer was employed. The results reveal that the ET between alpha 84 and beta 84 pigment pair has a time constant of 1-2 ps; the energy migration between alpha 84 and beta 84 pairs within the R-PE trimer has a time constant of 30-40 ps. We also demonstrated an ET process from phycourobilin to phycoerythrobilin with a time constant as fast as 2.5-3.0 ps, which was directly observed in fluorescence kinetics by selective excitation of the phycourobilin molecules acting as the energy donor.
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000302768500010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49415]
专题	中国科学院化学研究所
通讯作者	Weng, Yuxiang
作者单位	1.Chinese Acad Sci, Inst Phys, Lab Soft Matter Phys, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Photochem, BNLMS, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen, Hailong,Dang, Wei,Xie, Jie,et al. Ultrafast energy transfer pathways in R-phycoerythrin from Polysiphonia urceolata[J]. PHOTOSYNTHESIS RESEARCH,2012,111(1-2):81-86.
APA	Chen, Hailong,Dang, Wei,Xie, Jie,Zhao, Jingquan,&Weng, Yuxiang.(2012).Ultrafast energy transfer pathways in R-phycoerythrin from Polysiphonia urceolata.PHOTOSYNTHESIS RESEARCH,111(1-2),81-86.
MLA	Chen, Hailong,et al."Ultrafast energy transfer pathways in R-phycoerythrin from Polysiphonia urceolata".PHOTOSYNTHESIS RESEARCH 111.1-2(2012):81-86.