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Related Concept Videos

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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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TELP, a sensitive and versatile library construction method for next-generation sequencing.

Xu Peng1, Jingyi Wu2, Reinhard Brunmeir1

  • 1Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore 117609, Singapore.

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|September 17, 2014
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Summary
This summary is machine-generated.

We developed a versatile DNA library preparation method for ChIP-seq and RNA-seq, significantly increasing sensitivity for rare samples. This method enables high-quality epigenomic and gene expression profiling from minimal DNA amounts.

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Area of Science:

  • Genomics and Molecular Biology
  • Epigenetics
  • Transcriptomics

Background:

  • Next-generation sequencing (NGS) is crucial for genome-wide profiling of histone modifications, transcription factor binding, and gene expression.
  • Current chromatin immunoprecipitated DNA sequencing (ChIP-seq) methods require nanograms of DNA, limiting studies on rare cell types or clinical samples.
  • Standard cDNA sequencing (RNA-seq) also faces challenges with sample input limitations.

Purpose of the Study:

  • To introduce a versatile and highly sensitive library construction method applicable to both ChIP-seq and RNA-seq on Illumina platforms.
  • To overcome the limitations of low DNA input in standard ChIP-seq protocols.
  • To enable comprehensive genomic and transcriptomic analyses from limited biological samples.

Main Methods:

  • Developed a streamlined library construction protocol minimizing DNA purification steps to reduce sample loss.
  • Applied the method to ChIP-seq for epigenomic and transcription factor binding profiling in murine adipocytes.
  • Utilized the method for RNA-seq to profile gene expression dynamics during murine adipogenesis, preserving strand specificity.

Main Results:

  • Generated high-quality epigenomic and transcription factor binding maps using ChIP-seq.
  • Successfully prepared ChIP-seq libraries from as little as 25 pg of starting DNA, demonstrating high sensitivity.
  • Achieved paired-end sequencing for ChIP-seq and strand-specific RNA-seq, providing comprehensive transcriptomic data.
  • Systematically profiled gene expression dynamics during murine adipogenesis.

Conclusions:

  • The novel library construction method offers high sensitivity and versatility for both ChIP-seq and RNA-seq.
  • This approach significantly expands the applicability of NGS techniques to rare cell types and limited clinical samples.
  • The method facilitates robust genomic, epigenomic, transcriptomic, and interactomic studies.