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A reference proteomic database of Lactobacillus plantarum CMCC-P0002
1State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, China.
Plos One
|October 15, 2011
Summary
This study identified 434 proteins in Lactobacillus plantarum, including key proteins for genetic manipulation. It also mapped protein interactions, revealing complexes involved in important cellular functions for probiotic research.
Area of Science:
- Microbiology
- Proteomics
- Biochemistry
Background:
- Lactobacillus plantarum is a common probiotic bacteria found in fermented foods.
- Understanding its proteome is crucial for leveraging its probiotic potential and for genetic engineering applications.
Purpose of the Study:
- To comprehensively identify and characterize the proteome of Lactobacillus plantarum.
- To construct the first protein interaction map for L. plantarum.
- To provide foundational data for advanced proteomic research and genetic manipulation.
Main Methods:
- Two-dimensional electrophoresis was used to separate whole-cell and secretory proteins.
- Tandem mass spectrometry (MS/MS) was employed for protein identification.
- Blue-Native/SDS-PAGE techniques were utilized to map protein interactions.
Main Results:
- A total of 434 proteins were identified, including a plasmid-encoded hypothetical protein (pLP9000_05).
- The top 20 most abundant proteins were cataloged for potential use in expression systems.
- The study identified a heterodimeric complex (maltose phosphorylase Map3 and Map2) and two homodimeric complexes (Map3 and Map2), highlighting their functional significance.
Conclusions:
- This research provides a valuable proteomic dataset for Lactobacillus plantarum.
- The identified protein complexes offer insights into the bacterium's cellular mechanisms.
- The findings facilitate future genetic manipulation and proteomic studies of L. plantarum.
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