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Comparative proteomics of matrix fractions between pimpled and normal chicken eggshells
Zhangguo Liu1, Lingzi Song1, Lizhi Lu2
1College of Animal Science and Technology, Zhejiang Agriculture & Forestry University, Lin'an 311300, Zhejiang, PR China.
Journal of Proteomics
|July 31, 2017
Summary
Researchers compared eggshell matrix fractions using proteomics to identify proteins affecting eggshell quality. They found common proteins form the matrix backbone and identified 25 differential proteins that negatively impact eggshell quality.
Area of Science:
- Proteomics and Biomaterials Science
- Animal Science and Poultry Husbandry
Background:
- Eggshell matrix proteins are crucial for structural integrity and calcification.
- Understanding the proteomic differences between eggshell matrix fractions (acid-insoluble, water-insoluble, acid-water facultative-soluble) is key to improving eggshell quality.
- Previous research has broadly categorized eggshell proteins as insoluble (inter-mineral) or soluble (intra-mineral), but fraction-specific differences remain unclear.
Purpose of the Study:
- To compare the proteomic profiles of three distinct eggshell matrix fractions (M1, M2, M3) from normal and pimpled eggshells.
- To identify candidate proteins that significantly influence chicken eggshell quality.
- To elucidate the role of specific proteins in the structural framework and calcification processes of the eggshell.
Main Methods:
- Label-free quantitative proteomics was employed to analyze proteins in acid-insoluble (M1), water-insoluble (M2), and acid-water facultative-soluble (M3) matrix fractions.
- Comparative proteomic analysis was conducted between normal and pimpled eggshell matrix fractions.
- Proteomic data was analyzed to identify common major proteins and differentially abundant proteins using iBAQ values and fold-change cutoffs.
Main Results:
- A high degree of proteomic similarity was observed within the three matrix fractions of the same eggshell type, with common proteins dominating proteomic abundance.
- Forty-two common major proteins were identified across all three fractions, suggesting their role as backbone constituents of the chicken eggshell matrix.
- Twenty-five differential major proteins were identified between normal and pimpled eggshells, all of which were found to negatively influence eggshell quality.
Conclusions:
- Common proteins are the predominant contributors to the proteomic abundance in eggshell matrix fractions, forming a structural backbone.
- Abundance variations in common proteins may explain solubility differences between matrix fractions.
- Differential proteins screened from normal versus pimpled eggshells represent key candidates influencing eggshell quality, with potential origins from organs like the liver, spleen, or lymphocytes.
