TEMPERATURE-DEPENDENT HOLE-BURNING OF THE 684 NM CHLOROPHYLL-A OF THE ISOLATED REACTION-CENTER OF PHOTOSYSTEM-II - CONFIRMATION OF THE LINKER MODEL

被引:25
作者
CHANG, HC
SMALL, GJ
JANKOWIAK, R
机构
[1] IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011
[2] IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011
关键词
D O I
10.1016/0301-0104(95)00076-Z
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
Currently the nature of the additional chlorophyll a (Chl a) molecules which take the number of Chl a per isolated D1-DZ(cyt) b(559) complex beyond the value of four for the bacterial reaction center is a subject of much importance and interest. Chang et al. [J. Phys. Chem. 98 (1994) 7725], who studied preparations of this complex with significantly different Chl a contents, concluded that the 684 nm absorbing Chl a contribute to the additional Chl a and proposed that they are of the linker type, serving to shuttle energy from the proximal antenna complex to the reaction center. Implicit in this model is that the 684 nm Chl a communicate with the primary electron donor Chi a (P680) via energy transfer and that the resulting detrapping of the Q(y)-state of the 684 nm Chl a should depend strongly on temperature. Temperature dependent transient hole spectra are presented that are in complete accord with this prediction. Theoretical calculations on the kinetics and temperature dependence of the hole profile of the 680 nm absorption band are presented and provide convincing support for the linker model. The data are argued to be inconsistent with other models.
引用
收藏
页码:323 / 333
页数:11
相关论文
共 46 条
[21]   TRANSIENT AND PERSISTENT HOLE BURNING OF THE REACTION CENTER OF PHOTOSYSTEM-II [J].
JANKOWIAK, R ;
TANG, D ;
SMALL, GJ ;
SEIBERT, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (04) :1649-1654
[22]  
Jankowiak R., 1993, PHOTOSYNTHETIC REACT, P133
[23]  
KARUKSTIS KK, 1991, CHLOROPHYLLS, P769
[24]  
Kirmaier C., 1993, PHOTOSYNTHETIC REACT, P49
[25]   LOCATION OF CHLOROPHYLL(Z) IN PHOTOSYSTEM-II [J].
KOULOUGLIOTIS, D ;
INNES, JB ;
BRUDVIG, GW .
BIOCHEMISTRY, 1994, 33 (39) :11814-11822
[26]   SITE-SELECTION SPECTROSCOPY OF THE REACTION-CENTER COMPLEX OF PHOTOSYSTEM-II .1. TRIPLET-MINUS-SINGLET ABSORPTION DIFFERENCE - SEARCH FOR A 2ND EXCITON BAND OF P-680 [J].
KWA, SLS ;
EIJCKELHOFF, C ;
VANGRONDELLE, R ;
DEKKER, JP .
JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (31) :7702-7711
[27]   STABILIZATION OF ISOLATED PHOTOSYSTEM-II REACTION CENTER COMPLEX IN THE DARK AND IN THE LIGHT USING POLYETHYLENE-GLYCOL AND AN OXYGEN-SCRUBBING SYSTEM [J].
MCTAVISH, H ;
PICOREL, R ;
SEIBERT, M .
PLANT PHYSIOLOGY, 1989, 89 (02) :452-456
[28]  
MONTOYA G, 1990, FEBS LETT, V283, P255
[29]  
MOORE JW, 1981, KINETICS MECHANISMS, P313
[30]   ISOLATION OF A PHOTOSYSTEM-II REACTION CENTER CONSISTING OF D-1 AND D-2 POLYPEPTIDES AND CYTOCHROME-B-559 [J].
NANBA, O ;
SATOH, K .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1987, 84 (01) :109-112