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Published on: April 9, 2017
Microstructure and in-depth proteomic analysis of Perna viridis shell
Zhi Liao1, Yu-Ting Jiang1, Qi Sun1
1Laboratory of Marine Biological Source and Molecular Engineering, College of Marine Science, Zhejiang Ocean University, Zhoushan, Zhejiang, P.R. China.
This study reveals the proteome of the Perna viridis shell, identifying 378 shell proteins, including abundant myosin-tail, filament-like, and chitin-binding proteins. These findings enhance understanding of shell formation and muscle-shell attachment in this genus.
Area of Science:
- Marine Biology
- Biochemistry
- Materials Science
Background:
- The Perna viridis shell, composed of distinct mineral layers (myostracum and nacre), exhibits unique structural characteristics.
- Understanding the protein composition of mollusk shells is crucial for insights into biomineralization processes.
Purpose of the Study:
- To investigate the structural characteristics and proteome of the adult Perna viridis shell.
- To identify shell matrix proteins (SMPs) and their roles in shell formation and muscle-shell attachment.
Main Methods:
- Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray crystalline diffraction (XRD) for structural and polymorph analysis.
- Illumina sequencing for mantle transcriptome analysis.
- Combined proteomic/transcriptomic approach for shell protein identification.
Main Results:
- The P. viridis shell consists of aragonite, with two mineral layers: myostracum and nacre.
- A total of 378 shell proteins were identified, with myosin-tail, filament-like, and chitin-binding proteins being most abundant.
- Biomineralization-related SMPs, including those with Kunitz, A2M, WAP, and collagen domains, were identified, highlighting the roles of collagen and chitin.
Conclusions:
- This study presents the first comprehensive proteome of the Perna viridis shell.
- The identified SMPs provide new insights into the mechanisms of shell formation and muscle-shell attachment in Perna genus.
- The findings contribute to the broader understanding of biomineralization in marine invertebrates.
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