Guan L, Scandalios J G
Department of Genetics, North Carolina State University, Raleigh 27695-7614, USA.
J Mol Evol. 1996 May;42(5):570-9. doi: 10.1007/BF02352287.
We have compared the nucleotide and protein sequences of the three maize catalase genes with other plant catalases to reconstruct the evolutionary relationship among these catalases. These sequences were also compared with other eukaryotic and prokaryotic catalases. Phylogenies based on distances and parsimony analysis show that all plant catalases derive from a common ancestral catalase gene and can be divided into three distinct groups. The first, and major, group includes maize Cat1, barley Cat1, rice CatB, and most of the dicot catalases. The second group is an apparent dicot-specific catalase group encompassing the tobacco Cat2 and tomato Cat. The third is a monocot-specific catalase class including the maize Cat3, barley Cat2, and rice CatA. The maize Cat2 gene is loosely related to the first group. The distinctive features of monocot-specific catalases are their extreme high codon bias at the third position and low degree of sequence similarity to other plant catalases. Similarities in the intron positions for several plant catalase genes support the conclusion of derivation from a common ancestral gene. The similar intron position between bean catalases and human catalase implies that the animal and plant catalases might have derived from a common progenitor gene sequence.
我们已将三个玉米过氧化氢酶基因的核苷酸和蛋白质序列与其他植物过氧化氢酶进行比较，以重建这些过氧化氢酶之间的进化关系。这些序列还与其他真核生物和原核生物的过氧化氢酶进行了比较。基于距离和简约分析的系统发育表明，所有植物过氧化氢酶均源自一个共同的祖先过氧化氢酶基因，并且可分为三个不同的组。第一组也是主要组，包括玉米Cat1、大麦Cat1、水稻CatB以及大多数双子叶植物的过氧化氢酶。第二组是一个明显的双子叶植物特异性过氧化氢酶组，包括烟草Cat2和番茄Cat。第三组是单子叶植物特异性过氧化氢酶类别，包括玉米Cat3、大麦Cat2和水稻CatA。玉米Cat2基因与第一组关系松散。单子叶植物特异性过氧化氢酶的独特特征是其在第三位的极高密码子偏好性以及与其他植物过氧化氢酶的低序列相似性。几种植物过氧化氢酶基因内含子位置的相似性支持了源自共同祖先基因的结论。豆类过氧化氢酶和人类过氧化氢酶之间相似的内含子位置意味着动植物过氧化氢酶可能源自共同的祖基因序列。
