Köhler U, Cerff R, Brinkmann H
Institut für Genetik, Braunschweig, Germany.
Plant Mol Biol. 1996 Jan;30(1):213-8. doi: 10.1007/BF00017817.
We have sequenced and analysed the transaldolase (tal) genes from two cyanobacteria, Anabaena variabilis (ATCC 29413) and Synechocystis sp. PCC 6803, which are filamentous heterocyst-forming and unicellular organisms, respectively. The deduced amino acid sequences of the two cyanobacterial tal genes are 78% identical and are highly homologous to both eubacterial and eukaryotic transaldolases (Escherichia coli, two yeasts, and man) with values ranging from 54 to 60% amino acid identity. In contrast, the transaldolase homologous sequences from the cyanobacterium Nostoc sp. ATCC 29133, from Mycobacterium leprae, and the partial sequence from the higher plant Arabidopsis thaliana have a much lower degree of homology with each other and relative to the sequences mentioned above. These data indicate three different types of transaldolases.
我们对两种蓝细菌——可变鱼腥藻（ATCC 29413）和聚球藻属PCC 6803的转醛醇酶（tal）基因进行了测序和分析，它们分别是丝状异形胞形成菌和单细胞生物。这两个蓝细菌tal基因推导的氨基酸序列有78%相同，并且与真细菌和真核生物的转醛醇酶（大肠杆菌、两种酵母和人类）高度同源，氨基酸同一性值在54%至60%之间。相比之下，来自蓝细菌念珠藻属ATCC 29133、麻风分枝杆菌的转醛醇酶同源序列以及高等植物拟南芥的部分序列彼此之间以及相对于上述序列具有低得多的同源性。这些数据表明存在三种不同类型的转醛醇酶。
