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6 results for “Euglenozoa”
Gleaning Euglenozoa-specific DNA polymerases in public single-cell transcriptome data
<p><span>Multiple genes encoding family A DNA polymerases (famA DNAPs), which are evolutionary relatives of DNA polymerase </span><span>I</span><span> (Pol</span><span>I</span><span>) in bacteria and phages, have been found in eukaryotic genomes, and many of these proteins are used mainly in organelles. Among members of the phylum Euglenozoa, distinct types of famA DNAP, Pol</span><span>I</span><span>A, Pol</span><span>I</span><span>BCD+, POP, and eugPolA, have been found. It is intriguing how the suite of famA DNAPs had been established during the evolution of Euglenozoa, but the DNAP data have not been sampled from the taxa that sufficiently represent the diversity of this phylum. In particular, little sequence data were available for basal branching species in Euglenozoa until recently. Thanks to the single-cell transcriptome data from symbiontids and phagotrophic euglenids, we have an opportunity to cover the "hole" in the repertory of famA DNAPs in the deep branches in Euglenozoa. The current study identified 16 new famA DNAP sequences in the transcriptome data from 33 phagotrophic euglenids and two symbiontids, respectively. Based on the new famA DNAP sequences, the updated diversity and evolution of famA DNAPs in Euglenozoa are discussed.</span></p>
Gleaning Euglenozoa-specific DNA polymerases in public single-cell transcriptome data
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Fig. 1 in Ultrastructural and immunocytochemical investigation of paramylon combined with new 18S rDNA-based secondary structure analysis clarifies phylogenetic affiliation of Entosiphon sulcatum (Euglenida: Euglenozoa)
Fig. 1 Phylograms obtained from maximum likelihood (ML) analyses of 182 euglenozoan taxa with new 18S rDNA sequences boxed and most ingroup taxa pruned to major groupings, sequences of Heterolobosea and Jakobida were used as outgroup. Congruent Bayesian inference (BI) posterior probability values>0.50 were mapped onto both ML trees and are
Fig. 4 in Ultrastructural and immunocytochemical investigation of paramylon combined with new 18S rDNA-based secondary structure analysis clarifies phylogenetic affiliation of Entosiphon sulcatum (Euglenida: Euglenozoa)
Fig. 4 Schematic phylogram combining molecular and morphological findings corroborating phylogenetic position of Entosiphon as sister group of Helicales within Euglenida. States of key characters are illustrated tabularly: black squares code presence and blanks absence, e.g., paramylon is present only in Entosiphon and Helicales. Unpaired base in 18S rDNA helix 44 is present in primordial petalomonads and kinetoplastids, but absent in more derived taxa within respective groups. White Roman numerals depict heterogeneous dispersal of different types of feeding apparatuses (FA) according to Triemer and Farmer (1991), white Arabic numerals count for number of rods in FA. Heterolobosea and Jakobida represent outgroup taxa
Fig. 3 in Ultrastructural and immunocytochemical investigation of paramylon combined with new 18S rDNA-based secondary structure analysis clarifies phylogenetic affiliation of Entosiphon sulcatum (Euglenida: Euglenozoa)
Fig. 3 Transmission electron micrographs presenting ultrathin sections of phagotrophic euglenid key genera from top to bottom: Peranema trichophorum (a, b), Petalomonas cantuscygni (c, d), Ploeotia costata (e, f), and Entosiphon sulcatum (g, h). Left hand micrographs show ultrastructural examinations, while right hand micrographs display immunolabeled sections. Magnified detailed views of paramylon granules are given in inserts (a, b, g, h). FA feeding apparatus, FV food vacuole, M mitochondrion, N nucleus, No nucleolus, Pa paramylon, R reservoir, V vanes of the ingestion apparatus
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