Terminal steps of bacteriochlorophyll a phytol formation in purple photosynthetic bacteria.
نویسندگان
چکیده
Four chemically different bacteriochlorophylls (Bchls) a esterified with geranylgeraniol, dihydrogeranylgeraniol, tetrahydrogeranylgeraniol, and phytol have been detected by high-pressure liquid chromatography in cell extracts from Rhodopseudomonas sphaeroides and Chromatium vinosum. Bchl a containing phytol is the principal component, and the other three Bchls a comprise about 4% of the total Bchls a in stationary-phase cells of R. sphaeroides and C. vinosum. The high levels of the minor pigments occur in the beginning of Bchl a phytol formation, indicating that they are not degradation products, but intermediates of Bchl a phytol formation.
منابع مشابه
Physical mapping and functional assignment of the geranylgeranyl-bacteriochlorophyll reductase gene, bchP, of Rhodobacter sphaeroides.
The bacteriochlorophyll of the purple photosynthetic bacterium Rhodobacter sphaeroides is esterified with phytol. The presence of this alcohol moiety is essential for the correct assembly of the photosynthetic apparatus. Despite this, and the fact that R. sphaeroides is widely used for the study of structure-function relationships in photosynthesis, the molecular genetics of the steps in which ...
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عنوان ژورنال:
- Journal of bacteriology
دوره 158 1 شماره
صفحات -
تاریخ انتشار 1984