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Related Concept Videos

Protein Organization01:13

Protein Organization

Overview
Protein Folding01:22

Protein Folding

Overview
Protein Organization01:13

Protein Organization

Overview
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Protein Folding01:25

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.

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Related Experiment Video

Updated: Jun 18, 2026

A Whole Mount In Situ Hybridization Method for the Gastropod Mollusc Lymnaea stagnalis
07:33

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Molluscan shell proteins: primary structure, origin, and evolution.

Frédéric Marin1, Gilles Luquet, Benjamin Marie

  • 1UMR CNRS 5561 Biogéosciences, Université de Bourgogne 6 Boulevard Gabriel, 21000 DIJON, France.

Current Topics in Developmental Biology
|October 24, 2007
PubMed
Summary
This summary is machine-generated.

Molluscan shell biomineralization is regulated by a complex matrix of proteins controlling mineral formation. These shell matrix proteins offer potential for biomaterials and biomedical applications.

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Last Updated: Jun 18, 2026

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Published on: March 15, 2016

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An Integrated Approach for Microprotein Identification and Sequence Analysis
09:37

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Published on: July 12, 2022

Area of Science:

  • Biomineralization
  • Materials Science
  • Biochemistry

Background:

  • Molluscan shell biomineralization research has evolved, focusing on nanoscale structures and matrix proteins.
  • The shell matrix, though minor by weight, is crucial for controlling mineral synthesis, polymorph selection (calcite vs. aragonite), and microstructural organization.
  • Classical models of shell synthesis control (nucleation and growth inhibition) are being replaced by more complex concepts.

Purpose of the Study:

  • To review recent advances in understanding molluscan shell biomineralization.
  • To highlight the role of shell matrix proteins in controlling shell formation.
  • To explore the potential applications of molluscan shell matrix proteins.

Main Methods:

  • Characterization of shell matrix protein components.
  • Analysis of protein primary structure and potential functionalities (e.g., enzymatic activity, cell signaling).
  • Discussion of evolutionary aspects of shell proteins.

Main Results:

  • A wide variety of shell proteins have been identified since the mid-1990s, with diverse physicochemical properties (pI range).
  • Many proteins possess modular structures, suggesting multifunctional roles in biomineralization.
  • The extracellular calcifying shell matrix functions as an integrated system regulating protein-mineral and protein-protein interactions.

Conclusions:

  • The molluscan shell matrix is a sophisticated regulatory system.
  • Shell matrix proteins are key to controlling the intricate process of shell formation.
  • These proteins represent a promising source of bioactive molecules for biomaterials and biomedical fields.