Environmental Genomic Libraries
Environmental Genomic Libraries - Related Videos
20:59
Large Insert Environmental Genomic Library Production
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Cited by 18 •
2009
Construction of a fosmid library with environmental genomic DNA isolated from the vertical depth continuum of a seasonally hypoxic fjord is described. The resulting clone library is picked into 384-well plates and archived for downstream sequencing and functional screening by the application of an automated colony picking system.
11:59
Competitive Genomic Screens of Barcoded Yeast Libraries
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Cited by 44 •
2011
We have developed comprehensive, unbiased genome-wide screens to understand gene-drug and gene-environment interactions. Methods for screening these mutant collections are presented.
13:26
Automated Gel Size Selection to Improve the Quality of Next-generation Sequencing Libraries Prepared from Environmental Water Samples
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Cited by 9 •
2015
This manuscript describes an automated gel size selection approach for purifying DNA fragments for next-generation sequencing. The Ranger Technology provides complete automation of the entire process of agarose gel loading, electrophoretic analysis, and recovery of targeted DNA fragments allowing for high-throughput and high quality next-generation sequencing libraries.
08:40
Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
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Cited by 1 •
2012
The Target ID Library is a plasmid-based, genome-wide collection of cloned cDNA used to identify miRNA targets. Here we demonstrate its use and application.
08:31
Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Cited by 2 •
2013
Single Virus Genomics (SVG) is a method to isolate and amplify the genomes of single virons. Viral suspensions of a mixed assemblage are sorted using flow cytometry onto a microscope slide with discrete wells containing agarose, thereby capturing the virion and reducing genome shearing during downstream processing. Whole genome amplification is achieved using multiple displacement amplification (MDA) resulting in genomic material that is suitable for sequencing.
FAQs
The central mechanism is culture-independent recovery: DNA is taken directly from an environmental community, so genetic material from microbes that are not individually cultivated can still enter the investigation. Fragmenting that DNA creates manageable pieces for cloning or sequencing, allowing researchers to examine community-level genetic information rather than relying on a single isolate.
Cloning vectors and direct sequencing provide two routes for handling recovered fragments. A vector-based library stores environmental DNA inserts as cloned units, whereas direct sequencing analyzes the fragments without that cloning step. Both approaches provide access to community genetic material, but they represent different experimental routes for examining genes, pathways, and organisms.
Researchers can use these libraries to connect genetic content with broad ecological questions. The data may reveal which genes and metabolic pathways occur in a community, while also supporting assessment of biodiversity and microbial adaptation. In biology, this shifts attention from cultivable species alone toward the genetic potential present across an environmental sample.
Sample origin sets the environmental context for the library. Soil, water, and sediment can each supply DNA from microbial communities, making the approach useful for examining genetic material from different settings. That context matters when investigators relate library findings to nutrient cycling, biodiversity, or the ways microbes may adapt to their surroundings.
A basic workflow begins by collecting an environmental sample and extracting its DNA. The recovered material is fragmented, then either inserted into cloning vectors or sequenced directly. Researchers analyze the resulting collection for genes, metabolic pathways, and organisms. This sequence converts mixed environmental genetic material into data suitable for biological interpretation.
Analysis can identify genetic elements associated with metabolic pathways, indicate the organisms represented in the sample, and support evaluation of microbial biodiversity. Because the material comes from an entire community, the findings can also inform questions about nutrient cycling and adaptation rather than focusing only on the characteristics of one organism.
Environmental genomic libraries have both discovery and applied value. Examining them can support the search for novel enzymes, antibiotics, and other molecules, including candidates relevant to biotechnology and medicine. The same resource can contribute to environmental monitoring, linking community-derived genetic information with investigations of environmental systems and microbial activity.