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The specific activities of 13 aminoacyl-soluble ribonucleic acid (sRNA) synthetases were measured at various time intervals during the germination of Botryodiplodia theobromae conidiospores. The enzyme activities were low or absent in ungerminated spores, and they increased rapidly as germination proceeded. When extracts of the ungerminated spores were prepared with mortar and pestle, very little or no enzyme activity was detected. When the extracts were prepared with a mechanical homogenizer, however, they exhibited some enzyme activity, although less than did the extracts from germinated spores. Enzyme activities from germinated spores were approximately the same, regardless of the method of preparation. The enzyme fraction from ungerminated spores prepared with a mechanical homogenizer could also stimulate incorporation of phenylalanine into polyphenylalanine in the presence of ribosomes, polyuridylic acid, and sRNA, although the activity was approximately only 15 to 20% that of a similar enzyme fraction from germinated spores. It is concluded that ungerminated spores of B. theobromae contain active aminoacyl-sRNA synthetases and transfer enzymes, although the activities are low when compared to germinated spores.

journal of bacteriology

Protein Synthesis During Fungal Spore Germination II. Aminoacyl-soluble Ribonucleic Acid Synthetase Activities During Germination of <i>Botryodiplodia theobromae</i> Spores

Protein Synthesis During Fungal Spore Germination II. Aminoacyl-soluble Ribonucleic Acid Synthetase Activities During Germination of Botryodiplodia theobromae Spores