AtnMat2, a nuclear-encoded maturase required for splicing of group-II introns in Arabidopsis mitochondria.

ABSTRACT: Mitochondria (mt) in plants house about 20 group-II introns, which lie within protein-coding genes required in both organellar genome expression and respiration activities. While in nonplant systems the splicing of group-II introns is mediated by proteins encoded within the introns themselves (known as "maturases"), only a single maturase ORF (matR) has retained in the mitochondrial genomes in plants; however, its putative role(s) in the splicing of organellar introns is yet to be established. Clues to other proteins are scarce, but these are likely encoded within the nucleus as there are no obvious candidates among the remaining ORFs within the mtDNA. Intriguingly, higher plants genomes contain four maturase-related genes, which exist in the nucleus as self-standing ORFs, out of the conte

SUBMITTER: Keren I 

PROVIDER: S-EPMC2779688 | biostudies-literature | 2009 Dec

REPOSITORIES: biostudies-literature