Structure of nuclear-localized cox3 genes in Chlamydomonas reinhardtii and in its colorless close relative Polytomella sp

Current Genetics
Xochitl Pérez-MartínezDiego González-Halphen

Abstract

Several chlorophyte algae do not have the cox3 gene, encoding subunit III of cytochrome c oxidase, in their mitochondrial genomes. The cox3 gene is nuclear-encoded in the photosynthetic alga Chlamydomonas reinhardtii and in the colorless alga Polytomella sp. In this work, the genomic sequences of the cox3 genes of these two closely related algae are reported. The cox3 genes of both C. reinhardtii and Polytomella sp. contain four introns in the region encoding the putative mitochondrial-targeting sequences. These four introns show low sequence identities, but their locations are conserved between these species. The cox3 gene of C. reinhardtii has five additional introns in the region encoding the mature subunit III of cytochrome c oxidase. Sequence analysis of intron 6 of the cox3 gene of C. reinhardtii revealed similarity with two sequence elements present in introns of several other nuclear genes from this green alga. In the majority of the genes, these conserved sequences are located either near the 3' end or near the 5' end of the introns. Based on these data, we propose that the colorless genus Polytomella separated from C. reinhardtii after the cox3 gene was transferred to the nucleus. The data also support the evolutionar...Continue Reading

Citations

Dec 13, 2005·Eukaryotic Cell·Ariane AtteiaSamuel I Beale
Feb 25, 2014·Mitochondrion·Miriam Vázquez-AcevedoDiego González-Halphen
Oct 1, 2011·Biochimica Et Biophysica Acta·Ileana C SotoAntoni Barrientos
Dec 1, 2004·Annual Review of Genetics·Michael W GrayGertraud Burger
Jun 23, 2012·Molecular Phylogenetics and Evolution·Elizabeth Rodríguez-SalinasDiego González-Halphen
Mar 20, 2012·Biochimica Et Biophysica Acta·Alejandra Jiménez-SuárezDiego González-Halphen
Oct 19, 2017·Journal of Bioenergetics and Biomembranes·Alejandra Jiménez-SuárezDiego González-Halphen

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