Occurrence of the Bacteriochlorophyll-Binding Polypeptides B870a and B800— B850a in the Mutant Strains Y5 and A la + of Rhodopseudomonas capsulata, which are Defective in Formation of the Light-Harvesting Complexes B870 and B800 — 850, Respectively

Monier H. Tadros, Roland D ierstein *, and G erhart Drews Institut für Biologie 2, Mikrobiologie, Albert-Ludwigs-Universität, D-7800 Freiburg, Bundesrepublik Deutschland Z. Naturforsch. 39c, 922-926 (1984); received July 11, 1984 Rhodopseudomonas capsulata, Light Harvesting Complexes, Bacteriochlorophyll-Binding Poly­ peptides The mutant strains A la + and 75 of Rhodopseudomonas capsulata are defective in formation of the light-harvesting complexes B800-850 and B870, respectively, but synthesize the large bacteriochlorophyll-binding polypeptides of the respectively complexes, shown by amino acid composition, Nor C-terminal sequence and immunoblotting. The stable assembly of the light-harvesting complexes in the membrane seems to be dependent from the coordinated synthesis of all pigment and protein components.