高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (11): 1746.

• 论文 • 上一篇    下一篇

藻胆体发射终端能量传递过程的研究

王慧1, 赵井泉2, 蒋丽金2   

  1. 1. 清华大学环境科学与工程系, 北京 100084;
    2. 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1998-11-04 出版日期:1999-11-24 发布日期:1999-11-24
  • 通讯作者: 王慧,女,29岁,博士,讲师.
  • 作者简介:王慧,女,29岁,博士,讲师.
  • 基金资助:

    国家自然科学基金(批准号:3970065)资助课题

Picosecond Energy Transfer Between Choromophores in Allophycocyanin Terminal Emitters

WANG Hui1, ZHAO Jing-Quan2, JIANG Li-Jin 2   

  1. 1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China;
    2. Institute of Photographic Chemistry, Chinese Academy of Sciences, Beijing 100101, China
  • Received:1998-11-04 Online:1999-11-24 Published:1999-11-24

摘要: 利用超快速时间分辨光谱研究了蓝绿藻藻胆体的2个变藻蓝发射终端(APB,API)单体和三聚体内的能量传递过程,探测到APB和API单体的两组亚基αAPAP和αAPBAPAP18)间的能量传递时间常数分别为30ps和194ps.APB和API三聚体所共有的9~32ps的短寿命组分来源于同一单体内能量由αAP向βAP的传递过程。另2个短寿命组分(68ps和50ps)则可分别指认为APB内βAP→αAPB和API内αAP→β18能量传递的时间常数,所测得的长寿命组分则是几种终端基团基态恢复的平衡时间。

关键词: 藻胆体, 变藻蓝蛋白, 皮秒时间分辨光谱, 能量传递

Abstract: Ultrafast time-resolved fluorescence spectra were used to study the energy transfer kinetics of API and APB from Cynobacteria Spirulina platensis. The same fast lifetime component(38 ps) was found in API and APB monomers which was attributed to energy transfer between αAPAP, another two lifetimes(198 ps,141 ps) observed describe the energy transfer processes of βAP→ αAPBand αAP/ β18. In trimers, we also found the excited energy transfer between αAPAP in API and APB with 29-32 ps constants. The substitution of αAPBin AP Iand β18in APB gives rise to a heterogeneity in the chromophore-conformations and chromophore chromophore interactions, another fast lifetimes(68 ps and 50 ps) was also found and attributed to the excited energy transfer between βAP/ αAPB and αAP18in the same monomers.

Key words: Phycobilisome, Allophycocyanin, ps time-resolved fluorescence spectra, Energy transfer

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