ISSN:
1432-1432
Schlagwort(e):
Evolution
;
Catalase
;
Phylogenetic tree,Zea mays L.
;
Isozyme
;
Antioxidant genes
;
Gene Structure
;
Oxidative stress
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract 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 maizeCatl, barleyCat1, riceCatB and most of the dicot catalases. The second group is an apparent dicot-specific catalase group encompassing the tobaccoCat2 and tomatoCat. The third is a monocot-specific catalase class including the maize Cat3, barley Cat2, and riceCatA. 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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02352287
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