Ascaris hemoglobin gene: plant-like structure reflects the ancestral globin gene.

AUTOR(ES)

Sherman, D R

RESUMO

Animal globin genes have two introns at strictly conserved positions, while plant globin genes have both of these as well as an additional, central intron. It has been proposed that a common ancestor gene had three introns, one of which was subsequently lost from animal but not plant globin genes. We have elucidated the cDNA sequence and gene structure of a hemoglobin from the parasitic nematode Ascaris suum and found a plant-like central intron, providing strong evidence for a three-intron ancestor of modern globin genes.

Documentos Relacionados

• Evidence That Plant-Like Genes in Chlamydia Species Reflect an Ancestral Relationship between Chlamydiaceae, Cyanobacteria, and the Chloroplast
• Plant-like traits associated with metabolism of Trypanosoma parasites
• Trypanosoma cruzi expresses a plant-like ascorbate-dependent hemoperoxidase localized to the endoplasmic reticulum
• Saccharomyces cerevisiae has a single glutamate synthase gene coding for a plant-like high-molecular-weight polypeptide.
• Mammalian multidrug-resistance gene: correlation of exon organization with structural domains and duplication of an ancestral gene.