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Science 14 December 1990:
Vol. 250. no. 4987, pp. 1566 - 1570
DOI: 10.1126/science.2125747
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Articles

Science, Vol 250, Issue 4987, 1566-1570
Copyright © 1990 by American Association for the Advancement of Science

articles

Bacterial origin of a chloroplast intron: conserved self-splicing group I introns in cyanobacteria

MQ Xu, SD Kathe, H Goodrich-Blair, SA Nierzwicki-Bauer, and DA Shub

Department of Biological Sciences, State University of New York, Albany 12222.

A self-splicing group I intron has been found in the gene for a leucine transfer RNA in two species of Anabaena, a filamentous nitrogen-fixing cyanobacterium. The intron is similar to one that is found at the identical position in the same transfer RNA gene of chloroplasts of land plants. Because cyanobacteria were the progenitors of chloroplasts, it is likely that group I introns predated the endosymbiotic association of these eubacteria with eukaryotic cells.


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Splicing of the rolA transcript of Agrobacterium rhizogenes in Arabidopsis.
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Science 266, 1986-1988
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An expanding universe of introns.
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Splice-site selection and decoding: are they related?.
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Introns pop up in new places--what does it mean?.
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Science 250, 1512
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Science. ISSN 0036-8075 (print), 1095-9203 (online)