Ohta N, Sato N, Kawano S, Kuroiwa T
Advanced Research Center for Human Sciences, Waseda University, Saitama, Japan.
Curr Genet. 1994 Apr;25(4):357-61. doi: 10.1007/BF00351490.
The trpA gene (for the alpha subunit of tryptophan synthase) was found on the plastid genome of the "primitive" unicellular red alga Cyanidium caldarium strain RK-1. This is the first example of an actively-transcribed gene for tryptophan synthase encoded on a plastid genome. In contrast to trpA, trpB (the gene for the beta subunit of tryptophan synthase) was encoded in the cell nucleus. Considering the primitive characteristics of C. caldarium, trpB must have been lost from the plastid genome before trpA.
在“原始”单细胞红藻嗜热蓝藻(Cyanidium caldarium)RK - 1株的质体基因组上发现了trpA基因(用于色氨酸合成酶的α亚基)。这是质体基因组上编码色氨酸合成酶的一个活跃转录基因的首个实例。与trpA不同,trpB(色氨酸合成酶的β亚基基因)是在细胞核中编码的。考虑到嗜热蓝藻的原始特征,trpB肯定在trpA之前就已从质体基因组中丢失。