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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...

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A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA
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Toward a universal microarray: prediction of gene expression through nearest-neighbor probe sequence identification.

Thomas E Royce1, Joel S Rozowsky, Mark B Gerstein

  • 1Interdepartmental Program in Computational Biology and Bioinformatics, Yale University, USA.

Nucleic Acids Research
|August 10, 2007
PubMed
Summary

A novel DNA microarray design uses off-target probes to accurately measure gene expression. This approach advances comparative genomics by enabling species-agnostic genomic tiling microarray analysis.

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Area of Science:

  • Genomics and Bioinformatics
  • Molecular Biology

Background:

  • Comparative genomics requires versatile tools for analyzing diverse species.
  • Genomic tiling microarrays offer high feature density and unbiased data.
  • A universal DNA microarray design is needed to facilitate cross-species genomic studies.

Purpose of the Study:

  • To assess the feasibility of a generic DNA microarray design for any species.
  • To leverage genomic tiling microarrays for a species-agnostic approach.
  • To demonstrate proof-of-principle for probing nucleic acid targets using off-target features.

Main Methods:

  • Divided human gene sequences into 25-nucleotide subsequences.
  • Identified 25-nucleotide probes with minimal mismatches (not exact matches) to subsequences.
  • Averaged signal intensities from nearest-neighbor features to predict gene expression levels across 33 hybridizations.

Main Results:

  • Evaluated the sensitivity and specificity of the approach for detecting active genes.
  • Assessed transcriptional consistency between exons of the same gene.
  • Determined the reproducibility of the method across different tiling array designs.

Conclusions:

  • The study provides proof-of-principle for using off-target, nearest-neighbor features to probe nucleic acid targets.
  • This method demonstrates potential for developing a generic DNA microarray applicable to any species.
  • The findings support the advancement of comparative genomics through versatile microarray designs.