Physiologie Végétale Métabolique E. R. A. CNRS, Université de Paris-Sud, no 799 Bâtiment 430, 91405, Orsay Cedex, France.
Plant Cell Rep. 1984 Jun;3(3):106-8. doi: 10.1007/BF02441011.
In two tobacco mutants lacking ribulose, 1,5-bisphosphate carboxylase/oxygenase the amount of glutamine synthetase and its activity were determined and compared with the wild type green cells. It was shown that in these two mutants glutamine synthetase protein content was six times lower than in the wild type. This situation was comparable to that found in etiolated cells where ribulose 1,5-bisphosphate carboxylase/oxygenase was absent. These observations suggest that a common regulatory mechanism might control the dual light dependent biosynthesis of both enzymes. The results have also implications concerning the efficiency of the reassimilation of ammonia by chloroplastic glutamine synthetase during the photorespiratory process.
在两个缺乏核酮糖-1,5-二磷酸羧化酶/加氧酶的烟草突变体中，测定了谷氨酰胺合成酶的含量和活性，并与野生型绿色细胞进行了比较。结果表明，这两个突变体中的谷氨酰胺合成酶蛋白含量比野生型低 6 倍。这种情况与不存在核酮糖 1,5-二磷酸羧化酶/加氧酶的黄化细胞相似。这些观察结果表明，一种共同的调节机制可能控制这两种酶的双重光依赖性生物合成。这些结果还与叶绿体谷氨酰胺合成酶在光呼吸过程中再同化氨的效率有关。
