Related Experiment Video
Updated: Jul 28, 2026
07:54
Dynamic Proteomic and miRNA Analysis of Polysomes from Isolated Mouse Heart After Langendorff Perfusion
Published on: August 29, 2018
An Optimized Proteomics Approach Reveals Novel Alternative Proteins in Mouse Liver Development
Ying Yang1, Hongwei Wang2, Yuanliang Zhang1
1State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, SAR, China.
Molecular & Cellular Proteomics : MCP
|December 9, 2022
Summary
Researchers developed a new mass spectrometry method using size-exclusion chromatography to identify novel alternative proteins (AltProts). This approach efficiently enriches small proteins, leading to more discoveries and insights into developmental biology.
Area of Science:
- Proteomics
- Genomics
- Developmental Biology
Background:
- Alternative open reading frames (AltORFs) encode alternative proteins (AltProts), but their identification via mass spectrometry is challenging due to short lengths and low abundance.
- Existing methods struggle to efficiently detect and characterize these novel peptides and proteins.
Purpose of the Study:
- To develop and validate an improved mass spectrometry methodology for the identification of alternative proteins (AltProts).
- To enrich and fractionate small proteins (<40 kDa) from complex proteomes for enhanced AltProt discovery.
Main Methods:
- Utilized size-exclusion chromatography for simultaneous enrichment and fractionation of alternative proteins (AltProts).
- Systematically compared the developed approach against 10 other methods for AltProt discovery efficiency.
Main Results:
- The novel size-exclusion chromatography approach identified more AltProts with higher intensities compared to existing workflows.
- Identified 89 novel AltProts in mouse liver, with 39 showing differential expression between embryonic and adult stages.
- Discovered distinct functional roles for AltProts during embryonic development (RNA splicing) versus adulthood (metabolism).
Conclusions:
- The reported size-exclusion chromatography method offers an effective strategy for identifying novel alternative proteins (AltProts).
- The identified AltProts provide new insights into molecular mechanisms underlying developmental biology and cellular processes.
