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The Use of Reverse Phase Protein Arrays RPPA to Explore Protein Expression Variation within Individual Renal Cell Cancers
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High-Throughput Post-Translational Modification Analyses by Reverse Phase Protein Array.

Zhongcheng Shi1, Michael Hoang Nguyen1, Yuan Yao1

  • 1Advanced Technology Cores, Baylor College of Medicine, Houston, TX, USA.

Methods in Molecular Biology (Clifton, N.J.)
|July 2, 2025
PubMed
Summary
This summary is machine-generated.

This study details a Reverse Phase Protein Array (RPPA) protocol for profiling post-translational protein modifications. RPPA technology enables comprehensive proteomic analysis, including phosphorylation and histone modifications.

Keywords:
Antibody-based proteomicsHigh throughputHistonePhosphorylationPost-translational modificationReverse phase protein array

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Proteomics

Background:

  • Post-translational modifications (PTMs) are critical for regulating protein function and cellular signaling.
  • PTMs involve chemical alterations to amino acids, influencing protein activity without changing the genetic sequence.
  • Cellular signal transduction relies on dynamic PTMs to switch proteins between active and inactive states.

Purpose of the Study:

  • To present a detailed Reverse Phase Protein Array (RPPA) protocol for profiling post-translational modifications.
  • To demonstrate the utility of RPPA for assessing both protein expression and specific PTMs.
  • To provide a method for analyzing protein phosphorylation and histone modifications.

Main Methods:

  • Utilized Reverse Phase Protein Array (RPPA) technology, an antibody-based platform.
  • Applied RPPA to analyze whole cell lysates for protein phosphorylation.
  • Employed RPPA for profiling histone modifications using purified histones.

Main Results:

  • Successfully demonstrated the capability of RPPA to detect and profile various post-translational modifications.
  • Validated RPPA as a robust method for assessing protein phosphorylation levels.
  • Confirmed RPPA's effectiveness in analyzing histone modifications.

Conclusions:

  • RPPA is a powerful and versatile tool for comprehensive proteomic profiling, including PTMs.
  • The presented protocol facilitates detailed analysis of protein phosphorylation and histone modifications.
  • This methodology aids in understanding the role of PTMs in cellular processes and disease states.