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The genes encoding cAMP-dependent protein kinase catalytic subunit homologues of the microsporidia Encephalitozoon intestinalis and E. cuniculi: molecular characterisation and phylogenetic analysis |
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| Authors: | Equinet Leila Bapteste Eric Thellier Marc Ouarzane-Amara Meryem Vivarès Christian P Desportes-Livage Isabelle Doerig Christian |
| Affiliation: | a INSERM U609, Wellcome Centre for Molecular Parasitology, University of Glasgow, 56 Dumbarton Road, Glasgow G11 6NU, Scotland, UK b Phylogénie, Bio-informatique et Génome, UMR CNRS 7622, Université Pierre et Marie Curie, Paris 6, Paris, France c INSERM U511, Centre Hospitalier et Universitaire Pitié-Salpêtrière, Université Pierre et Marie Curie, Paris 6, Paris, France d Laboratoire de parasitologie moléculaire et cellulaire, UMR CNRS 6023, Université Blaise Pascal, Aubière, France |
| Abstract: | A gene encoding a protein kinase was identified by homology-based PCR amplification in Encephalitozoon intestinalis, a microsporidian parasite pathogenic to humans, and its orthologue has been identified by database mining in the genome of the related species E. cuniculi, whose sequence has been recently published. Phylogenetic analysis revealed that the proteins encoded by these genes are homologues of the cAMP-dependent protein kinase catalytic subunits (PKAc). Southern blot analysis indicated that the EiPKAc gene is present in two copies in the E. intestinalis genome, whereas the E. cuniculi orthologue (EcPKAc) is a single copy gene. RT-PCR data showed that the EiPKAc gene is expressed in at least one of the intracellular stages during infection of the mammalian host cell by E. intestinalis. |
| Keywords: | Microsporidia Protein kinase Protein kinase A Phosphorylation Phylogeny |
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