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Comparative analysis reveals signatures of differentiation amid genomic polymorphism in Lake Malawi cichlids

BACKGROUND: Cichlid fish from East Africa are remarkable for phenotypic and behavioral diversity on a backdrop of genomic similarity. In 2006, the Joint Genome Institute completed low coverage survey sequencing of the genomes of five phenotypically and ecologically diverse Lake Malawi species. We report a computational and comparative analysis of these data that provides insight… [Read More]

The complete genome sequence of Moorella thermoacetica (f. Clostridium thermoaceticum)

This paper describes the genome sequence of Moorella thermoacetica (f. Clostridium thermoaceticum), which is the model acetogenic bacterium that has been widely used for elucidating the Wood-Ljungdahl pathway of CO and CO(2) fixation. This pathway, which is also known as the reductive acetyl-CoA pathway, allows acetogenic (often called homoacetogenic) bacteria to convert glucose stoichiometrically into… [Read More]

A genomic analysis of the archaeal system Ignicoccus hospitalis-Nanoarchaeum equitans

BACKGROUND: The relationship between the hyperthermophiles Ignicoccus hospitalis and Nanoarchaeum equitans is the only known example of a specific association between two species of Archaea. Little is known about the mechanisms that enable this relationship. RESULTS: We sequenced the complete genome of I. hospitalis and found it to be the smallest among independent, free-living organisms…. [Read More]

ARHGEF9 disruption in a female patient is associated with X linked mental retardation and sensory hyperarousal

Introduction: We identified a female patient with mental retardation and sensory hyperarousal. She has a de novo paracentric inversion of one X chromosome with completely skewed inactivation of the normal X chromosome. Objective: We aimed to identify whether a single gene or gene region caused her cognitive and behavioural impairment and that of others. Results:… [Read More]

IMG/M: a data management and analysis system for metagenomes

IMG/M is a data management and analysis system for microbial community genomes (metagenomes) hosted at the Department of Energys (DOE) Joint Genome Institute (JGI). IMG/M consists of metagenome data integrated with isolate microbial genomes from the Integrated Microbial Genomes (IMG) system. IMG/M provides IMGs comparative data analysis tools extended to handle metagenome data, together with… [Read More]

The genome of Laccaria bicolor provides insights into mycorrhizal symbiosis

Mycorrhizal symbioses – the union of roots and soil fungi – are universal in terrestrial ecosystems and may have been fundamental to land colonization by plants(1,2). Boreal, temperate and montane forests all depend on ectomycorrhizae(1). Identification of the primary factors that regulate symbiotic development and metabolic activity will therefore open the door to understanding the… [Read More]

Genome sequencing and analysis of the biomass-degrading fungus Trichoderma reesei (syn. Hypocrea jecorina)

Trichoderma reesei is the main industrial source of cellulases and hemicellulases used to depolymerize biomass to simple sugars that are converted to chemical intermediates and biofuels, such as ethanol. We assembled 89 scaffolds (sets of ordered and oriented contigs) to generate 34 Mbp of nearly contiguous T. reesei genome sequence comprising 9,129 predicted gene models…. [Read More]

Parallel evolution of truncated transfer RNA genes in arachnid mitochondrial genomes

The cloverleaf secondary structure of transfer RNA (tRNA) is highly conserved across all forms of life. Here, we provide sequence data and inferred secondary structures for all tRNA genes from 8 new arachnid mitochondrial genomes, including representatives from 6 orders. These data show remarkable reductions in tRNA gene sequences, indicating that T-arms are missing from… [Read More]