Back to Search
Start Over
A new gene encoding tRNAPro (GGG) is present in the chloroplast genome of black pine: a compilation of 32 tRNA genes from black pine chloroplasts
- Source :
- Current Genetics; August 1994, Vol. 26 Issue: 2 p153-158, 6p
- Publication Year :
- 1994
-
Abstract
- The chloroplast genome of black pine (Pinus thumbergii), a gymnosperm, contains 32 different tRNA genes, 30 of which correspond to those previously identified in tobacco and rice chloroplast genomes. Two additional genes encode tRNA<superscript>Pro</superscript> (GGG) and tRNA<superscript>Arg</superscript> (CCG); the former is newly identified while the latter is present in liverwort, Physcomitrella patens and Angiopteris lygodiifolia, chloroplast genomes. Moreover, a partial copy of the split tRNA<superscript>Gly</superscript> (UCC) gene and full copies of tRNA<superscript>His</superscript> (GUG), tRNA<superscript>Thr</superscript> (GGU) and tRNA<superscript>Ser</superscript> (GCU) genes are present in the large single-copy region of the genome, suggesting extensive rearrangements of the chloroplast genome during evolutio. No tRNA genes whose tRNA products can recognize codons CUU/C (Leu) and GCU/C (Ala) have been found. We propose that the 32 tRNAs are sufficient to read all the 61 sense codons in the black pine system using the “two-out-of-three” and the “U:N wobble” mechanisms.
Details
- Language :
- English
- ISSN :
- 01728083 and 14320983
- Volume :
- 26
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- Current Genetics
- Publication Type :
- Periodical
- Accession number :
- ejs15303056
- Full Text :
- https://doi.org/10.1007/BF00313804