A plastome mutation affects processing of both chloroplast and nuclear DNA-encoded plastid proteins |
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Authors: | Ellen M Johnson Linda S Schnabelrauch and Barbara B Sears |
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Institution: | (1) Department of Genetics, Attila József University, K?zépfasor 52, 6726 Szeged, Hungary;(2) Agricultural Biotechnology Center, Institute of Molecular Genetics, 2101 G?d?ll?, PO Box 170, Hungary |
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Abstract: | Summary A bovine tRNA gene cluster has been characterized and the sequences of four tDNAs determined. Two of the tDNAs could encode tRNASer
IGA, one tDNASer
UGA, and the fourth tRNAGln
CUG. The three serine tDNAs representing the UCN codon isoacceptor family are almost identical. However, the sequence of the tDNASer
TGA differs from a previously sequenced bovine tDNASer
TGA at 12 positions (ca. 14%). This finding suggests that in the bovine genome, two subfamilies of genes might encode tRNASer
UGA. It also raises the possibility that new genes for a specific UCN isoacceptor might arise from the genes of a different isoacceptor, and could explain previously observed differences between species in the anticodons of coevolving pairs of tRNAsSer
UCN. The gene cluster also contains complete and partial copies, and fragments, of the BCS (bovine consensus sequence) SINE (short interspersed nuclear element) family, six examples of which were sequenced. Some of these elements occur in close proximity to two of the serine tDNAs. |
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Keywords: | Repressor Operator binding domain Repressor-β al fusion Temperate phage Rhizobium |
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