Premium
Evidence for a trimeric organization of the photosystem I complex from the thermophilic cyanobacterium Synechococcus sp.
Author(s) -
Boekema E.J.,
Dekker J.P.,
van Heel M.G.,
Rögner M.,
Saenger W.,
Witt I.,
Witt H.T.
Publication year - 1987
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(87)80679-8
Subject(s) - synechococcus , photosystem ii , cyanobacteria , photosystem i , thermophile , electron micrographs , photosynthetic reaction centre , photosynthesis , chemistry , photosystem , biophysics , molecule , electron transport chain , photochemistry , crystallography , botany , biology , biochemistry , bacteria , electron microscope , physics , optics , organic chemistry , genetics , enzyme
A photosystem I (PS I) reaction center complex was isolated and purified from the cyanobacterium Synechococcus sp. The complex has a molecular mass of about 600 kDa and contains 120 Chl a molecules per photoactive Chl a I (P‐700). Electron micrographs show that the PS I complex has the shape of a disk with a diameter of about 19 nm and a thickness of 6 nm. Computer analysis reveals that the complex is composed of three similar units.