A Comparative Study and a Phylogenetic Exploration of the Compositional Architectures of Mammalian Nuclear Genomes
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{"title"=>"A Comparative Study and a Phylogenetic Exploration of the Compositional Architectures of Mammalian Nuclear Genomes", "type"=>"journal", "authors"=>[{"first_name"=>"Eran", "last_name"=>"Elhaik", "scopus_author_id"=>"9939380900"}, {"first_name"=>"Dan", "last_name"=>"Graur", "scopus_author_id"=>"7004525157"}], "year"=>2014, "source"=>"PLoS Computational Biology", "identifiers"=>{"pui"=>"600617430", "sgr"=>"84912144697", "issn"=>"15537358", "pmid"=>"25375262", "scopus"=>"2-s2.0-84912144697", "doi"=>"10.1371/journal.pcbi.1003925"}, "id"=>"e910e88a-7ccf-3980-9659-83916b3aabab", "abstract"=>"Author Summary The non-uniformity of DNA composition in mammalian genomes has been known for over four decades. Many attempts have been made to provide a concise description of this heterogeneity and to identify the evolutionary driving forces behind this compositional phenomenology. The first concise description of the genome suggested an isochoric structure according to which the mammalian genome consists of a mosaic of long, compositionally homogenous DNA sequences. With the advent of genome sequencing, this description was found to be inappropriate. We have recently proposed an alternative “compositional domains” model that depicts the human and cow genomes as composed of mixture of compositionally homogeneous and nonhomogeneous domains. Most of these domains are very short. Since its proposal, this model has been validated in plethora of invertebrate genomes. Here, we test the validity of this model on eleven mammalian and avian genomes using seven attributes of compositional domains and discuss their evolution. We also use these attributes to decide between two competing phylogenetic hypotheses. Our findings provide strong supporting evidence for the “compositional domains” model and indicate that rodents are not as close to primates as envisioned by the Euarchontoglires hypothesis.", "link"=>"http://www.mendeley.com/research/comparative-study-phylogenetic-exploration-compositional-architectures-mammalian-nuclear-genomes", "reader_count"=>30, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>2, "Researcher"=>11, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>6, "Other"=>2, "Student > Master"=>2, "Lecturer"=>1, "Professor"=>4}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>2, "Researcher"=>11, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>6, "Other"=>2, "Student > Master"=>2, "Lecturer"=>1, "Professor"=>4}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Biochemistry, Genetics and Molecular Biology"=>8, "Agricultural and Biological Sciences"=>17, "Medicine and Dentistry"=>1, "Computer Science"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>17}, "Computer Science"=>{"Computer Science"=>2}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>8}, "Unspecified"=>{"Unspecified"=>2}}, "reader_count_by_country"=>{"United States"=>4, "France"=>1, "Germany"=>1, "Spain"=>1}, "group_count"=>0}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1782436"], "description"=>"<p>Phylogenetic trees illustrating two competing hypotheses concerning the relative kinships of murids, laurasiatherians, and primates to one another.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231406, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Phylogenetic_trees_illustrating_two_competing_hypotheses_concerning_the_relative_kinships_of_murids_laurasiatherians_and_primates_to_one_another_/1231406", "title"=>"Phylogenetic trees illustrating two competing hypotheses concerning the relative kinships of murids, laurasiatherians, and primates to one another.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782440"], "description"=>"<p>Homogeneous-domain lengths are shown above the diagonal; nonhomogeneous-domain lengths are below, where the distribution curves of the species on the X-axis are solid and those on the Y-axis are dashed. On the diagonal we compare homogeneous and nonhomogeneous domain length distributions within a taxon. The first value in each plot is the <i>p</i>-value of significant (Kolmogorov-Smirnov goodness-of-fit test) and the colors represent the actual <i>p</i>-value after correcting for multiple testing using the FDR method (black>0.05 and pink<0.05). The second and third values are effect size calculated as the nonoverlapping percentage of the two distributions and Cohen's <i>d</i> using the Hedges' <i>g</i> estimator, respectively.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231410, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Pairwise_comparisons_of_domain_length_distributions_for_five_taxa_/1231410", "title"=>"Pairwise comparisons of domain-length distributions for five taxa.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782442"], "description"=>"<p>For simplicity, the mean distributions of primates, murids, and laurasiatherians are shown. In the inset, the majority of the domains of medium-short length.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231412, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_cumulative_distribution_of_homogeneous_domain_lengths_in_log_scale_/1231412", "title"=>"The cumulative distribution of homogeneous domain lengths in log scale.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782444"], "description"=>"<p>Box plots summarize medians, quartiles, and range.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231414, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g004"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Compositional_domain_densities_of_all_chromosomes_/1231414", "title"=>"Compositional domain densities of all chromosomes.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782446"], "description"=>"<p>Homogeneous domains are in blue shades; nonhomogeneous domains are in green shades. Domains longer than 300 kb are in dark shades; domains shorter than 300 kb are in light shades. Compositionally homogeneous domains longer than 300 kb (i.e., isochoric domains) are in dark blue.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231416, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g005"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Genomic_coverage_of_four_compositional_domain_types_/1231416", "title"=>"Genomic coverage of four compositional domain types.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782454"], "description"=>"<p>The dashed lines represent the maximum likelihood power-law fits to the data.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231424, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g006"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_cumulative_density_function_P_x_of_compositional_homogeneous_domain_lengths_x_points_plotted_on_a_log_log_scale_/1231424", "title"=>"The cumulative density function <i>P</i>(x) of compositional homogeneous domain lengths (x) (points) plotted on a log-log scale.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782455"], "description"=>"<p>Homogeneous-domain lengths are shown above the diagonal; nonhomogeneous-domain lengths are below, where the distribution curves of the species on the X-axis are solid and those on the Y-axis are dashed. On the diagonal we compare homogeneous and nonhomogeneous domain GC content distributions within a taxon. The first value in each plot is the <i>p</i>-value of significant (Kolmogorov-Smirnov goodness-of-fit test) and the colors represent the actual <i>p</i>-value after correcting for multiple testing using the FDR method (black>0.05 and pink<0.05). The second and third values are effect size calculated as the nonoverlapping percentage of the two distributions and Cohen's <i>d</i> using the Hedges' <i>g</i> estimator, respectively.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231425, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g007"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Pairwise_comparisons_of_domain_GC_content_distributions_for_five_taxa_/1231425", "title"=>"Pairwise comparisons of domain GC content distributions for five taxa.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782458"], "description"=>"<p>Each domain GC content and <i>GCσ</i> are represented by a point on the map. The frequency of different points is represented by colors ranging from red (highest frequency) to blue (lowest frequency). The mean GC content of the mammalian genome is marked by horizontal line.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231428, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g008"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_A_two_dimensional_joint_distribution_of_homogeneous_domain_GC_content_and_its_standard_deviation_GC_963_/1231428", "title"=>"A two dimensional joint distribution of homogeneous domain GC content and its standard deviation (<i>GCσ</i>).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782461"], "description"=>"<p>Each domain's GC content and length are represented by a point in the map. The frequency of different points is represented by colors ranging from red (highest frequency) to blue (lowest frequency). The mean GC content of the mammalian genome is marked by horizontal line.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231431, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.g009"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_A_two_dimensional_joint_distribution_of_homogeneous_domain_GC_content_and_length_in_a_log_scale_/1231431", "title"=>"A two dimensional joint distribution of homogeneous domain GC content and length in a log scale.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782463"], "description"=>"<p>Genome statistics for compositional, homogeneous, nonhomogeneous, and “isochoric” domains.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231433, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Genome_statistics_for_compositional_homogeneous_nonhomogeneous_and_8220_isochoric_8221_domains_/1231433", "title"=>"Genome statistics for compositional, homogeneous, nonhomogeneous, and “isochoric” domains.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782465"], "description"=>"<p>A summary of the supporting evidences for the two phylogenetic hypotheses (<a href=\"http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1003925#pcbi-1003925-g001\" target=\"_blank\">Figure 1</a>) using seven genetic attributes as selection criteria.</p>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231435, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.t002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_A_summary_of_the_supporting_evidences_for_the_two_phylogenetic_hypotheses_Figure_1_using_seven_genetic_attributes_as_selection_criteria_/1231435", "title"=>"A summary of the supporting evidences for the two phylogenetic hypotheses (Figure 1) using seven genetic attributes as selection criteria.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-11-06 04:42:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/1782543", "https://ndownloader.figshare.com/files/1782545", "https://ndownloader.figshare.com/files/1782546", "https://ndownloader.figshare.com/files/1782547", "https://ndownloader.figshare.com/files/1782548", "https://ndownloader.figshare.com/files/1782549", "https://ndownloader.figshare.com/files/1782550", "https://ndownloader.figshare.com/files/1782551", "https://ndownloader.figshare.com/files/1782552", "https://ndownloader.figshare.com/files/1782553"], "description"=>"<div><p>For the past four decades the compositional organization of the mammalian genome posed a formidable challenge to molecular evolutionists attempting to explain it from an evolutionary perspective. Unfortunately, most of the explanations adhered to the “isochore theory,” which has long been rebutted. Recently, an alternative compositional domain model was proposed depicting the human and cow genomes as composed mostly of short compositionally homogeneous and nonhomogeneous domains and a few long ones. We test the validity of this model through a rigorous sequence-based analysis of eleven completely sequenced mammalian and avian genomes. Seven attributes of compositional domains are used in the analyses: (1) the number of compositional domains, (2) compositional domain-length distribution, (3) density of compositional domains, (4) genome coverage by the different domain types, (5) degree of fit to a power-law distribution, (6) compositional domain GC content, and (7) the joint distribution of GC content and length of the different domain types. We discuss the evolution of these attributes in light of two competing phylogenetic hypotheses that differ from each other in the validity of clade Euarchontoglires. If valid, the murid genome compositional organization would be a derived state and exhibit a high similarity to that of other mammals. If invalid, the murid genome compositional organization would be closer to an ancestral state. We demonstrate that the compositional organization of the murid genome differs from those of primates and laurasiatherians, a phenomenon previously termed the “murid shift,” and in many ways resembles the genome of opossum. We find no support to the “isochore theory.” Instead, our findings depict the mammalian genome as a tapestry of mostly short homogeneous and nonhomogeneous domains and few long ones thus providing strong evidence in favor of the compositional domain model and seem to invalidate clade Euarchontoglires.</p></div>", "links"=>[], "tags"=>["clade Euarchontoglires", "domain types", "murid genome", "domain GC content", "nonhomogeneous domains", "domain model", "Mammalian Nuclear Genomes"], "article_id"=>1231511, "categories"=>["Uncategorised"], "users"=>["Eran Elhaik", "Dan Graur"], "doi"=>["https://dx.doi.org/10.1371/journal.pcbi.1003925.s001", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s002", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s003", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s004", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s005", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s006", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s007", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s008", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s009", "https://dx.doi.org/10.1371/journal.pcbi.1003925.s010"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_A_Comparative_Study_and_a_Phylogenetic_Exploration_of_the_Compositional_Architectures_of_Mammalian_Nuclear_Genomes_/1231511", "title"=>"A Comparative Study and a Phylogenetic Exploration of the Compositional Architectures of Mammalian Nuclear Genomes", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2014-11-06 04:42:08"}

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Relative Metric

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