Network Clustering Revealed the Systemic Alterations of Mitochondrial Protein Expression
Author Information
Author(s): Jeon Jouhyun, Jeong Jae Hoon, Baek Je-Hyun, Koo Hyun-Jung, Park Wook-Ha, Yang Jae-Seong, Yu Myeong-Hee, Kim Sanguk, Pak Youngmi Kim
Primary Institution: Pohang University of Science and Technology
Hypothesis
How do nuclear-encoded mitochondrial proteins change under dysfunctional states caused by mitochondrial DNA depletion?
Conclusion
The study demonstrates that mitochondrial protein composition changes to remodel the functional organization of mitochondrial protein networks in response to dysfunctional cellular states.
Supporting Evidence
- Up-regulated and down-regulated proteins were organized into two predominant subnetworks that exhibited distinct biological processes.
- The down-regulated network modules are involved in typical mitochondrial functions.
- Up-regulated proteins are responsible for mtDNA repair and regulation of mt protein expression and transport.
- Cells attempted to compensate for mtDNA depletion by modulating the coordinated expression/transport of mt proteins.
Takeaway
When mitochondria are not working properly, the proteins inside them change to help fix the problem, like how you might change your clothes to fit the weather.
Methodology
The study used network analysis of gene expression data and quantitative proteomic analysis to investigate mitochondrial protein alterations.
Statistical Information
P-Value
7.55×10−78
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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