Structural features and phylogeny of the actin gene of Chondrus crispus (Gigartinales, Rhodophyta)

Bouget, François‐Yves; Kerbourc'h, Corinne; Liaud, Marie-Françoise; Goër, Susan Loiseaux de; Quatrano, Ralph S.; Cerff, Rüdiger; Kloareg, Bernard

doi:10.1007/bf00315783

Cited by 25 publications

(26 citation statements)

References 58 publications

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“…Analyses of actin genes from two different rhodophytes (17,47) place the red algae as the immediate outgroup to the plant͞animal͞fungal clade, in agreement with our results. Only trees based on genes encoding cytosolic glyceraldehyde-3-phosphate dehydrogenase (GapC) (6,15) have suggested a relationship between the red algal and plant sequences; however, statistical support is lacking for this relationship (an equally parsimonious tree does not include the rhodophyte-plant clade) (6).…”

Section: Discussionsupporting

confidence: 90%

“…before the common ancestor of plants, animals, and fungi (13,17,18,47). Still another position for red algae in the eukaryotic hierarchy has been suggested because of similarities between rhodophyte chloroplast and mitochondrial genomes and those of green plants.…”

Section: Discussionmentioning

confidence: 99%

“…Although SSU rDNA trees consistently show the Rhodophyta to have emerged before the common ancestor of plants, animals, and fungi (8,13,14), intervening branches are poorly supported statistically and are considered unreliable (3,8). Other nuclear genes examined thus far also fail to provide robust support either for or against a monophyletic relationship of plants with red algae (6,8,(15)(16)(17)(18). Additional nuclear markers clearly are needed to resolve the relationship between the host components of these symbiotic associations.…”

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confidence: 99%

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The origin of red algae: Implications for plastid evolution

Stiller

Hall

1997

Proc. Natl. Acad. Sci. U.S.A.

337

157

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The origin of the red algae has remained an enigma. Historically the Rhodophyta were classified first as plants and later as the most ancient eukaryotic organisms. Recent molecular studies have indicated similarities between red and green plastids, which suggest that there was a single endosymbiotic origin for these organelles in a common ancestor of the rhodophytes and green plants. Previous efforts to confirm or reject this effort by analyses of nuclear DNA have been inconclusive; thus, additional molecular markers are needed to establish the relationship between the host cell lineages, independent of the evolutionary history of their plastids. To furnish such a data set we have sequenced the largest subunit of RNA polymerase II from two red algae, a green alga and a relatively derived amoeboid protist. Phylogenetic analyses provide strong statistical support for an early evolutionary emergence of the Rhodophyta that preceded the origin of the line that led to plants, animals, and fungi. These data, which are congruent with results from extensive analyses of nuclear rDNA, argue for a reexamination of current models of plastid evolution.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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The origin of red algae: Implications for plastid evolution

Stiller

Hall

1997

Proc. Natl. Acad. Sci. U.S.A.

337

157

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“…Species in which this status has been confirmed include Candida albicans (Losberger & Ernst, 1989), Saccharomyces cerevisiae (Gallwitz & Sures, 1980 ;Ng & Abelson, 1980), Schizosaccharomyces pombe (Mertins & Gallwitz, 1987), Kluyveromyces lactis (Deshler et al, 1989) and Filobasidiella neoformans (Cox et al, 1995). The actin gene has been used successfully to determine phylogenetic relationships among a number of eukaryotes (Bhattacharya et al, 1991 ;Bhattacharya & Ehlting, 1995 ;Drouin et al, 1995 ;Bouget et al, 1995), including certain fungi (Cox et al, 1995 ;Wery et al, 1996). Some of these studies demonstrated that actin gene sequences do not show an independent evolution of characters on all hierarchical levels.…”

Section: # 2001 Iumsmentioning

confidence: 99%

Partial sequence analysis of the actin gene and its potential for studying the phylogeny of Candida species and their teleomorphs.

Daniel¹,

Sorrell²,

Meyer³

2001

International Journal of Systematic and Evolutionary Microbiology

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The actin gene has been studied as a potential phylogenetic marker for selected members of the anamorphic genus Candida and seven related teleomorphic genera (Debaryomyces, Issatchenkia, Kluyveromyces, Saccharomyces and Pichia from the Saccharomycetaceae ; Clavispora and Metschnikowia from the Metschnikowiaceae). The nucleotide sequences of 36 fungal taxa were analysed with respect to their molecular evolution and phylogenetic relationships. A total of 460 bp (47 %) of the coding 979 bp were variable and 396 bp (40 %) of these were found to be phylogenetically informative. Further analysis of the sequences showed that the genic GMC contents were higher than the nuclear GMC contents for most of the taxa. A strong positive correlation was found between GMC content over all codon positions and third positions. First and second codon positions were considered to be independent of the genic GMC content. The expected transition/transversion bias was detected only for third positions. Pairwise comparisons of transitional and transversional changes (substitutions) with total percentage sequence divergences revealed that the third position transitions showed no saturation for ingroup comparisons. A specific weighting scheme was set up, combining codon-position weights with changefrequency weights to enable the inclusion of distant outgroup taxa. Parsimony analyses of the investigated taxa showed four groups, three of which corresponded to major clusters that had been established previously in Candida by rDNA analysis. Interrelationships among the species groups in this heterogeneous anamorphic genus were determined. The polyphyletic origin of the selected Candida species and their close associations with several ascomycete genera were verified and known anamorph/teleomorph pairs confirmed. The actin gene was established as a valuable phylogenetic marker with the particular advantage of an unambiguous alignment.

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“…More recently, red algae have been attributed a relationship to glaucocystophytes and chlorobionts (Cavalier-Smith, 1993;Ragan and Gutell, 1995). In molecular studies based on 18S rRNA (e.g., Cavalier-Smith et al, 1994;Schlegel, 1994;Ragan and Gutell, 1995;Kumar and Rzhetsky, 1996; Van de Peer et al, 1996a), partial 28S rRNA (Perasso et al, 1989), and actin (Bouget et al, 1995;Takahashi et al, 1995) gene sequences, rhodophytes were found to belong to the eukaryotic ''crown'' taxa (Knoll, 1992), although the relationships between these taxa and the exact position of the red algae remain unclear.…”

Section: Introductionmentioning

confidence: 98%