About: The Evolutionary History of the Genus Acanthamoeba and the Identification of Eight New 18S rRNA Gene Sequence Types

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	The Evolutionary History of the Genus Acanthamoeba and the Identification of Eight New 18S rRNA Gene Sequence Types
Creator	Awwad, Mohammad Byerw6, Thomas Dean, Chantal Fuerst, Paul Gast,', Rebecca Ledee, Dolena Rodriguez-Zaragoza, Salvador Schroeder-Diedrich, Jill Stothard,', Diane
source	PMC
abstract	ABSTRACT The 18S rRNA gene (Rns) phylogeny of Acanthamoeba is being investigated as a basis for improvements in the nomenclature and taxonomy of the genus. We previously analyzed Rns sequences from 18 isolates from morphological groups 2 and 3 and found that they fell into four distinct evolutionary lineages we called sequence types T1‐T4. Here, we analyzed sequences from 53 isolates representing 16 species and including 35 new strains. Eight additional lineages (sequence types T5‐T12) were identified. Four of the 12 sequence types included strains from more than one nominal species. Thus, sequence types could be equated with species in some cases or with complexes of closely related species in others. The largest complex, sequence type T4, which contained six closely related nominal species, included 24 of 25 keratitis isolates. Rns sequence variation was insufficient for full phylogenetic resolution of branching orders within this complex, but the mixing of species observed at terminal nodes confirmed that traditional classification of isolates has been inconsistent. One solution to this problem would be to equate sequence types and single species. Alternatively, additional molecular information will be required to reliably differentiate species within the complexes. Three sequence types of morphological group 1 species represented the earliest divergence in the history of the genus and, based on their genetic distinctiveness, are candidates for reclassification as one or more novel genera.
has issue date	2007-05-02(xsd:dateTime)
bibo:doi	10.1111/j.1550-7408.1998.tb05068.x
bibo:pmid	9495032
has license	no-cc
sha1sum (hex)	16f093d0757e3ddab14b0d1c011be67581c5ceb5
schema:url	https://doi.org/10.1111/j.1550-7408.1998.tb05068.x
resource representing a document's title	The Evolutionary History of the Genus Acanthamoeba and the Identification of Eight New 18S rRNA Gene Sequence Types
has PubMed Central identifier	PMC7194170
has PubMed identifier	9495032
schema:publication	J Eukaryot Microbiol
resource representing a document's body	covid:16f093d0757e3ddab14b0d1c011be67581c5ceb5#body_text
is schema:about of	named entity 'SEQUENCE TYPE' named entity 'morphological' named entity 'molecular information' named entity 'evolutionary lineages' named entity 'Acanthamoeba' named entity 'keratitis' named entity 'Acanthamoeba' named entity 'Evolutionary History' named entity 'opportunistic human pathogens' named entity 'morphology' named entity 'genomic DNA' named entity 'allele' named entity 'phylogeny' named entity 'Nucleotide sequence' named entity 'Taq polymerase' named entity 'introns' named entity 'morphology' named entity 'alleles' named entity 'Acanthamoeba' named entity 'taxa' named entity 'cloned' named entity 'Vanderbilt University' named entity 'rhysodes' named entity 'allele' named entity 'Acanthamoeba' named entity 'eye infections' named entity 'morphological characters' named entity 'phylogeny' named entity 'genetic divergence' named entity 'PCR' named entity 'PCR reaction' named entity 'homologous' named entity 'multiple alleles' named entity 'phylogenetic analysis' named entity 'secondary structure' named entity 'rRNA' named entity 'phylogeny' named entity 'nucleotide' named entity 'alleles' named entity 'Balamuthia mandrillaris' named entity '17.04' named entity 'eukaryotic' named entity 'morphology' named entity 'keratitis' named entity 'keratitis' named entity 'Acanthamoeba' named entity 'common ancestor' named entity 'lung' named entity 'cloned' named entity 'introns' named entity 'University of Nijmegen' named entity 'Sogin' named entity 'alleles' named entity 'isoenzyme' named entity 'PCR' named entity 'secondary structure' named entity 'keratitis' named entity 'base pairs' named entity 'divergence event' named entity 'Kimura two-parameter' named entity 'taxa' named entity 'double stranded' named entity 'Acanthamoeba' named entity 'polyphyletic' named entity 'morphological' named entity 'genus' named entity 'amoeba' named entity 'alleles' named entity 'neighbor-joining' named entity 'primers' named entity 'DNA sequencing' named entity 'EDTA' named entity 'infection'

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