Differential influence of stimulating factors on cytoplasmic and chloroplastic aminoacyl-tRNA synthetase activity

Inhibition of the activity of aminoacyl‐tRNA synthetases in pollen grains of maize

“…Most of these factors are stimulatory. In lupin and maize a stimulating factor for aminoacylation reaction was a low-molecular-mass peptide (Bartkowiak 1982), which in different ways enhanced the activity of the Materials and methods enzymes from chloroplasts and cytoplasm (Radlowski and Bartkowiak 1989), Materials Studies on the chemical nature of effectors from pol-Aminoacyl-tRNA synthetases and the inhibitor were len grains, which regulate tbe activity of the enzymes, isolated from the pollen grains of S 26 inbred line of show that they are phenolic compounds, sugar nucleo-maize (Zea mays L,), The enzymes were also isolated tides or vitamins (Hopper and Dickinson 1972, Stanley from the seeds of S 26 inbred line. Tbe effector and the and Linskens 1985), In our laboratory, we previously synthetases were isolated occasionally from tbe pollen studied tbe factors stimulating the activity of aminoacyl-grains of the inbred lines S 146, SR 10, Co 255 and their…”