AMINOACYL TRANSFER RIBONUCLEIC ACID SYNTHETASES FROM CELL-FREE EXTRACT OF PLASMODIUM BERGHEI

被引:13
作者
ILAN, J
ILAN, J
机构
[1] Department of Biology, Temple University, Philadelphia
关键词
D O I
10.1126/science.164.3879.560
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Aminoacyl transfer ribonucleic acid synthetases for leucine, tyrosine, histidine, valine, proline, threonine, and lysine were obtained from cell-free extract of Plasmodium berghei. The leucyl-tRNA synthetase can charge tRNA from liver or Escherichia coli with leucine-C14, liver tRNA being a better substrate. The amount of aminoacylation increases linearly with respect to the quantity of tRNA added from either source and is dependent on the amount of enzyme added. The rate of aminoacylation is constant for 10 minutes and then decreases. It is enhanced by polyvinylsulfate. One-tenth millimolar pyrimethamine, hydroxystilbamidine, quinacrine, and acriflavine inhibited the formation of C14-valyl-tRNA. Species specificity between tRNA and its charging enzyme with respect to the recognition site is discussed.
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页码:560 / +
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