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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...
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Ribosome Profiling

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Related Experiment Video

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A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA
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Published on: December 2, 2009

Identification of proteins binding coding and non-coding human RNAs using protein microarrays.

Zurab Siprashvili1, Dan E Webster, Markus Kretz

  • 1The Program in Epithelial Biology, Stanford University School of Medicine, 269 Campus Drive, Room 2145, Stanford, CA 94305, USA.

BMC Genomics
|November 20, 2012
PubMed
Summary

Researchers developed a rapid protein microarray method to identify novel RNA-protein interactions. This approach uncovered new interactions, including Staufen 1 binding to TP53 mRNA, revealing its role in RNA stability.

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13:00

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Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip
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Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip

Published on: September 29, 2012

Area of Science:

  • Molecular Biology
  • Genomics
  • Biochemistry

Background:

  • Mammalian RNA regulation heavily relies on RNA-protein interactions.
  • High-throughput sequencing reveals numerous novel human RNAs, necessitating efficient interaction discovery methods.
  • Current methods for identifying RNA-binding proteins are time-consuming and material-intensive.

Purpose of the Study:

  • To develop a rapid, large-scale method for characterizing RNA-protein interactions.
  • To identify novel RNA-protein interactions using a high-throughput protein microarray approach.

Main Methods:

  • Developed and optimized a method to probe human protein microarrays with labeled, in vitro transcribed RNA.
  • Utilized protein microarrays containing approximately 9,400 human recombinant proteins.
  • Performed biochemical validation using reciprocal pull-down experiments (in vitro and in vivo).

Main Results:

  • Identified 137 specific RNA-protein interactions for 10 coding and non-coding RNAs.
  • Discovered novel interactions, including TP53 mRNA with Staufen 1 (Stau1) and HRAS mRNA with CNBP.
  • Proteins identified were enriched for known RNA-binding domains (RRM, RBD, zinc fingers).

Conclusions:

  • The developed protein microarray approach is scalable, rapid, and efficient for identifying novel human RNA-protein interactions.
  • Biochemical validation confirmed the utility of this method for studying uncharacterized RNA-protein interactions.
  • Functional analysis revealed a new role for Staufen 1 in maintaining TP53 RNA stability.