ISSN:
1432-0983
Schlagwort(e):
Chloroplast tRNA genes
;
URF
;
Chloroplast genome evolution
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Summary The genes for the initiator tRNACAU Met. tRNAUCC Gly, tRNAGGU Thr, tRNAUUC Glu and tRNAGUA Tyr and an open reading frame of 62 codons have been identified by sequencing a 2,358 by BamHl and a 1,378 by BamHI-Sst2 DNA fragments from wheat chloroplasts. A comparison of the organization of these five tRNA genes and of the open reading frame on the wheat, tobacco and spinach chloroplast genomes suggests that at least three genomic inversions must have occurred during the evolution of the wheat chloroplast genome from a spinach-like ancestor genome. Furthermore, it seems that in wheat the 91 by intergenic region between the genes for the initiator tRNAMet and the gene for tRNAUCC Gly is one end-point of the 20 kbp genomic inversion proposed by Palmer and Thompson in the case of maize (Palmer and Thompson 1982). A 119 bp duplication is located at this junction: the first copy comprises the 91 by of the intergenic region and the first 28 by of the tRNAMet gene, the second copy is found downstream of the tRNAMet gene.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00434054
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