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Genome sequence of Candidatus Westeberhardia cardiocondylae strain obscurior, a mutualistic endosymbiont from the invasive ant Cardiocondyla obscurior

ABSTRACT: Genome sequence of Candidatus Westeberhardia cardiocondylae strain obscurior, a mutualistic endosymbiont from the invasive ant Cardiocondyla obscurior

PROVIDER: PRJEB8217 | ENA |

REPOSITORIES: ENA

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Cardiocondyla obscurior

Project description:Cardiocondyla obscurior overview

| PRJNA269085 | ENA

Cardiocondyla obscurior

Project description:Cardiocondyla obscurior Raw sequence reads

| PRJNA819887 | ENA

Cardiocondyla obscurior

Project description:Cardiocondyla obscurior Raw sequence reads

| PRJNA384518 | ENA

A novel intracellular mutualistic bacterium in the invasive ant Cardiocondyla obscurior.

Project description:The evolution of eukaryotic organisms is often strongly influenced by microbial symbionts that confer novel traits to their hosts. Here we describe the intracellular Enterobacteriaceae symbiont of the invasive ant Cardiocondyla obscurior, 'Candidatus Westeberhardia cardiocondylae'. Upon metamorphosis, Westeberhardia is found in gut-associated bacteriomes that deteriorate following eclosion. Only queens maintain Westeberhardia in the ovarian nurse cells from where the symbionts are transmitted to late-stage oocytes during nurse cell depletion. Functional analyses of the streamlined genome of Westeberhardia (533?kb, 23.41% GC content) indicate that neither vitamins nor essential amino acids are provided for the host. However, the genome encodes for an almost complete shikimate pathway leading to 4-hydroxyphenylpyruvate, which could be converted into tyrosine by the host. Taken together with increasing titers of Westeberhardia during pupal stage, this suggests a contribution of Westeberhardia to cuticle formation. Despite a widespread occurrence of Westeberhardia across host populations, one ant lineage was found to be naturally symbiont-free, pointing to the loss of an otherwise prevalent endosymbiont. This study yields insights into a novel intracellular mutualist that could play a role in the invasive success of C. obscurior.

| S-EPMC4737929 | biostudies-literature

Cardiocondyla obscurior

Project description:Genome assembly of the invasive ant Cardiocondyla obscurior

| PRJNA680013 | ENA

Cardiocondyla obscurior strain:BR alpha

Project description:Cardiocondyla obscurior strain:BR alpha Genome sequencing

| PRJNA237579 | ENA

Genome sequencing of the ant Cardiocondyla obscurior BR2009-alpha

Project description:Genome sequencing of the ant Cardiocondyla obscurior BR2009-alpha and its associated microbes

| PRJEB35866 | ENA

Genome sequencing of the ant Cardiocondyla obscurior JP2010-OypB

Project description:Genome sequencing of the ant Cardiocondyla obscurior JP2010-OypB and its associated microbes

| PRJEB35867 | ENA

Accelerated Evolution of Developmentally Biased Genes in the Tetraphenic Ant Cardiocondyla obscurior.

Project description:Plastic gene expression underlies phenotypic plasticity and plastically expressed genes evolve under different selection regimes compared with ubiquitously expressed genes. Social insects are well-suited models to elucidate the evolutionary dynamics of plastic genes for their genetically and environmentally induced discrete polymorphisms. Here, we study the evolution of plastically expressed genes in the ant Cardiocondyla obscurior-a species that produces two discrete male morphs in addition to the typical female polymorphism of workers and queens. Based on individual-level gene expression data from 28 early third instar larvae, we test whether the same evolutionary dynamics that pertain to plastically expressed genes in adults also pertain to genes with plastic expression during development. In order to quantify plasticity of gene expression over multiple contrasts, we develop a novel geometric measure. For genes expressed during development, we show that plasticity of expression is positively correlated with evolutionary rates. We furthermore find a strong correlation between expression plasticity and expression variation within morphs, suggesting a close link between active and passive plasticity of gene expression. Our results support the notion of relaxed selection and neutral processes as important drivers in the evolution of adaptive plasticity.

| S-EPMC5400372 | biostudies-literature

Sphingolipids, Transcription Factors, and Conserved Toolkit Genes: Developmental Plasticity in the Ant Cardiocondyla obscurior.

Project description:Developmental plasticity allows for the remarkable morphological specialization of individuals into castes in eusocial species of Hymenoptera. Developmental trajectories that lead to alternative caste fates are typically determined by specific environmental stimuli that induce larvae to express and maintain distinct gene expression patterns. Although most eusocial species express two castes, queens and workers, the ant Cardiocondyla obscurior expresses diphenic females and males; this provides a unique system with four discrete phenotypes to study the genomic basis of developmental plasticity in ants. We sequenced and analyzed the transcriptomes of 28 individual C. obscurior larvae of known developmental trajectory, providing the first in-depth analysis of gene expression in eusocial insect larvae. Clustering and transcription factor binding site analyses revealed that different transcription factors and functionally distinct sets of genes are recruited during larval development to induce the four alternative trajectories. In particular, we found complex patterns of gene regulation pertaining to sphingolipid metabolism, a conserved molecular pathway involved in development, obesity, and aging.

| S-EPMC4615751 | biostudies-literature

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