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Tineola bisselliella

ABSTRACT: Tineola bisselliella Genome Assembly and Annotation

PROVIDER: PRJNA1102366 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR29372509_1.fastq.gz	Fastqsanger.gz
	SRR29372509_2.fastq.gz	Fastqsanger.gz
	SRR29372510_1.fastq.gz	Fastqsanger.gz
	SRR29372510_2.fastq.gz	Fastqsanger.gz

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Tineola bisselliella

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Next-Generation Sequencing Analysis of the Tineola bisselliella Larval Gut Transcriptome Reveals Candidate Enzymes for Keratin Digestion.

Project description:The clothes moth Tineola bisselliella is one of a few insects that can digest keratin, leading to the destruction of clothing, textiles and artwork. The mechanism of keratin digestion is not yet fully understood, partly reflecting the lack of publicly available genomic and transcriptomic data. Here we present a high-quality gut transcriptome of T. bisselliella generated from larvae reared on keratin-rich and keratin-free diets. The overall transcriptome consists of 428,221 contigs that were functionally annotated and screened for candidate enzymes involved in keratin utilization. As a mechanism for keratin digestion, we identified cysteine synthases, cystathionine β-synthases and cystathionine γ-lyases. These enzymes release hydrogen sulfite, which may reduce the disulfide bonds in keratin. The dataset also included 27 differentially expressed contigs with trypsin domains, among which 20 were associated with keratin feeding. Finally, we identified seven collagenases that were upregulated on the keratin-rich diet. In addition to this enzymatic repertoire potentially involved in breaking down keratin, our analysis of poly(A)-enriched and poly(A)-depleted transcripts suggested that T. bisselliella larvae possess an unstable intestinal microbiome that may nevertheless contribute to keratin digestion.

| S-EPMC8394580 | biostudies-literature

Larvae of the Clothing Moth Tineola bisselliella Maintain Gut Bacteria that Secrete Enzyme Cocktails to Facilitate the Digestion of Keratin.

Project description:The evolutionary success of insects is promoted by their association with beneficial microbes that enable the utilization of unusual diets. The synanthropic clothing moth Tineola bisselliella provides an intriguing example of this phenomenon. The caterpillars of this species have adapted to feed on keratin-rich diets such as feathers and wool, which cannot be digested by most other animals and are resistant to common digestive enzymes. Inspired by the hypothesis that this ability may be conferred by symbiotic microbes, we utilized a simple assay to detect keratinase activity and a method to screen gut bacteria for candidate enzymes, which were isolated from feather-fed larvae. The isolation of DNA from keratin-degrading bacterial strains followed by de novo genome sequencing resulted in the identification of a novel bacterial strain related to Bacillus sp. FDAARGOS_235. Genome annotation identified 20 genes with keratinase domains. Proteomic analysis of the culture supernatant from this gut bacterium grown in non-nutrient buffer supplemented with feathers revealed several candidate enzymes potentially responsible for keratin degradation, including a thiol-disulfide oxidoreductase and multiple proteases. Our results suggest that the unusual diet of T. bisselliella larvae promotes their association with keratinolytic microorganisms and that the ability of larvae to feed on keratin can at least partially be attributed to bacteria that produce a cocktail of keratin-degrading enzymes.

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RNA-seq analysis of Selaginella kraussiana leaf, rhizophore, seedling and stem

Project description:Annotation of the draft assembly of selaginella kraussiana

2016-02-09 | GSE69388 | GEO

Proteomics Informed by Transcriptomics for Characterising Active Transposable Elements and Genome Annotation in Aedes aegypti

Project description:The incomplete genome annotation of non-model organisms hampers molecular and proteomic studies. Proteomics informed by transcriptomics (PIT) is suited to non-model organisms because peptides are identified using transcriptomic, not genomic, data. Aedes aegypti is the mosquito vector for the (re-)emerging dengue, chikungunya, yellow fever and Zika viruses. An Ae. aegypti genome sequence is available, however experimental evidence for >90% of the Ae. aegypti proteome or the activity of transposable elements (TEs) that constitute 50% of the Ae. aegypti genome is lacking. We used PIT to characterise the proteome of the Aedes aegypti derived cell line Aag2. Hotspots of incomplete genome annotation were identified which are not explained by poor sequence and assembly quality. We developed criteria for the characterisation of proteomically active TEs and demonstrate that protein expression does not correlate with a TE’s genomic abundance. Finally, we identify Phasi Charoen-like virus as an unrecognised contaminant of Aag2 cells. We therefore present the first proteomic characterisation of mobile genetic elements, and provide proof-of-principle that PIT can evaluate a genome’s annotation to guide annotation efforts.

2017-02-15 | PXD003799 | Pride

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