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A mammalian organelle map by protein correlation profiling.
Leonard J Foster1, Carmen L de Hoog, Yanling Zhang
1Center for Experimental BioInformatics (CEBI), Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
Cell
|April 18, 2006
Summary
Researchers mapped 1,404 proteins to ten subcellular locations in mouse liver using protein correlation profiling. This study reveals multiple locations for 39% of organellar proteins, integrating cell biology and genomics for organelle analysis.
Area of Science:
- Cellular Biology
- Proteomics
- Genomics
Background:
- Protein localization is crucial for cellular organization.
- Understanding organelle proteomes is essential for cell biology.
- Existing proteomic data requires validation and refinement.
Purpose of the Study:
- To map protein localization to ten subcellular locations in mouse liver.
- To assess the specificity of published organellar proteomic inventories.
- To integrate proteomic and genomic data for insights into organelle biogenesis.
Main Methods:
- Protein correlation profiling was used to map protein localization.
- Enzymatic assays, marker protein profiles, and confocal microscopy were employed for validation.
- Integration of proteomic and genomic data was performed.
Main Results:
- 1,404 proteins were mapped to ten subcellular locations in mouse liver.
- Multiple locations were identified for 39% of all organellar proteins.
- Networks of coexpressed genes, cis-regulatory motifs, and transcriptional regulators involved in organelle biogenesis were identified.
Conclusions:
- The study provides a comprehensive map of protein localization in mouse liver organelles.
- A significant proportion of organellar proteins exhibit multiple subcellular locations.
- The integration of multi-omics data offers a unified framework for studying organelle biogenesis and function.
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