Natural proteins: Sources, isolation, characterization and applications

Area of Science:

• Biochemistry
• Molecular Biology
• Food Science

Background:

• Plant proteins are vital nutritional sources, providing essential amino acids for human health.
• Biotechnological advancements enable the use of plant proteins as medicinal agents.
• Plant seeds are abundant and economical sources of diverse proteins.

Purpose of the Study:

• To review the diverse sources of natural proteins.
• To detail the methodologies for protein isolation and purification.
• To discuss the characterization techniques for natural proteins.

Main Methods:

• Protein isolation relies on unique physicochemical properties such as amino acid composition, charge, solubility, and hydrophobicity.
• Common isolation methods include salting out and isoionic precipitation.
• Purification employs techniques like sodium dodecyl sulfate gel electrophoresis and various chromatography methods.
• Characterization utilizes mass spectrometry (MS) and liquid chromatography-mass spectrometry (LC-MS), including tandem MS for amino acid sequencing.

Main Results:

• The inherent physical and chemical attributes of proteins allow for the isolation of specific proteins from complex cellular mixtures.
• A range of established methods exists for both the isolation and purification of proteins.
• Advanced analytical techniques provide comprehensive characterization, including precise amino acid sequencing.

Conclusions:

• Natural proteins, particularly from plant sources, are versatile biomolecules with significant applications in food and medicine.
• Effective isolation, purification, and characterization are achievable through understanding and applying protein-specific properties and advanced methodologies.
• Continued research into protein science will further unlock their potential in various scientific and industrial fields.