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Identification of a family of group II introns encoding LAGLIDADG ORFs typical of group I introns

Published online by Cambridge University Press:  07 November 2002

NAVTEJ TOOR  and
STEVEN ZIMMERLY
NAVTEJ TOOR
Affiliation:
Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada
STEVEN ZIMMERLY
Affiliation:
Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada

Abstract

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Group I and group II introns are unrelated classes of introns that each encode proteins that facilitate intron splicing and intron mobility. Here we describe a new subfamily of nine introns in fungi that are group II introns but encode LAGLIDADG ORFs typical of group I introns. The introns have fairly standard group IIB1 RNA structures and are inserted into three different sites in SSU and LSU rRNA genes. Therefore, introns should not be assumed to be group I introns based solely on the presence of a LAGLIDADG ORF.

Keywords

catalytic RNAfungiintron-encoded proteinmitochondriaribozyme

Information

Type
LETTER TO THE EDITOR
Information
RNA , Volume 8 , Issue 11 , November 2002 , pp. 1373 - 1377
Copyright
2002 RNA Society