Wada K, Hase T, Matsubara H
J Biochem. 1975 Sep;78(3):637-9. doi: 10.1093/oxfordjournals.jbchem.a130950.
The complete amino acid sequence of a chloroplast-type ferredoxin from a fresh water prokaryote, Aphanothece sacrum, was determined. The sequence consisted of 96 amino acid residues and was homologous to those of ferredoxins of higher plants. Comparison of eight ferredoxins, including one from a green alga and three from blue-green algae, suggested that the sequences of algal ferredoxins were as different from one another as from those of higher plants. The relationship between the numbers of differences in amino acids and the period since separation from a common ancestor was not linear, even after correction for multiple substitution at an amino acid site in the sequence. It is very likely that the ferredoxins of angiosperms evolved rather rapidly and that those of algae, and particularly blue-green algae evolved rather slowly in the evolutionary scale. Several possible mechanisms of evolution of plants are discussed.
测定了来自淡水原核生物聚球藻的一种叶绿体型铁氧化还原蛋白的完整氨基酸序列。该序列由96个氨基酸残基组成，与高等植物的铁氧化还原蛋白序列同源。对包括一种绿藻和三种蓝藻在内的八种铁氧化还原蛋白进行比较表明，藻类铁氧化还原蛋白的序列彼此之间以及与高等植物的序列一样存在差异。即使对序列中氨基酸位点的多重取代进行校正后，氨基酸差异数量与从共同祖先分离后的时间之间的关系也不是线性的。在进化尺度上，被子植物的铁氧化还原蛋白很可能进化得相当快，而藻类，尤其是蓝藻的铁氧化还原蛋白进化得相当慢。文中讨论了植物进化的几种可能机制。
