Proteins are critical building blocks and working molecules in all cells. They are found in all living tissues and play a major role in the biological processes. They are produced in the same way in all organisms, through a process called protein synthesis. Other scientific methods can also be used to produce proteins. Read on to learn what protein product is and why it is significant.
Protein Production and Role of Genes
Protein production is known as a biotechnological process used to produce a specific protein. It is also called protein synthesis or gene expression. This is a two-step process that includes the transcription of recombinant DNA into mRNA. When an mRNA molecule is produced, it should align with the DNA sequence of a specific gene. The second stage involves the translation of mRNA into a functional protein. The final step involves the purification of the protein that has been expressed.
Most genes have the information required to make proteins and the two steps involved in the process, which include transcription and translation are called gene expression. The information in the gene’s DNA flows to a molecule called ribonucleic acid (RNA), which is found in the cell’s nucleus. Both RNA and DNA consist of building blocks called nucleotides, but their chemical properties slightly differ. The RNA with information for making a protein is known as messenger RNA (mRNA) since it carries the information from the DNA’s nucleus to the cytoplasm where the translation process takes place. The mRNA will interact with a ribosome, which can read the sequence of the nucleotides in the mRNA. The flow of information from DNA to RNA is critical in cell production, and it is a fundamental principle of molecular biology.
Protein Expression Systems
Protein expression refers to the way proteins are modified, synthesized, and regulated in different living organisms. The term can also refer to the scientific techniques utilized to manufacture proteins synthetically. Protein expression involves the production of recombinant proteins which are commonly used in life sciences for different functions like antibody generation and crystallography. There are various forms of protein expression systems used in the production of proteins.
Trichoderma reesei Protein Expression
Trichoderma reesei (Treesei) is an attractive expression host involved in the creation of recombinant proteins. Mesophilic filamentous fungus is one of the commonly used strains in the t reesei protein secretion as a result of its extremely high yield. The strain is also famous for its capability to grow in low-cost and simple environments. A protein can be produced at a high rate when appropriate recombinant protein expression technology is used.
E. coli
E. coli is the gram-negative bacteria that is the most preferred choice of expression host in the production of recombinant proteins. It is also utilized to produce eukaryotic proteins, especially the functional components of bigger proteins. There are many benefits of using E. coli, such as rapid production of samples, ease of handling, high yields of proteins, and short cell doubling time. Many microbiology laboratories use E. coli expression technology.
Baculovirus/insect cells (BEVS)
The baculovirus expression vector system (BEV) is an effective eukaryotic method used in the making of proteins and protein complexes. It uses the recombinant baculovirus consisting of the heterologous genes to infect specific insect cell cultures given as suspension or monolayers. It is used to produce eukaryotic proteins which are often challenging, but this method produces high yields. The production of recombinant baculoviruses used to be time-consuming, but the BEV system has streamlined the procedure.
Mammalian Cells
The lack of ideal folding machinery can hinder the production of mammalian cells in E.coli. However, the mammalian cell expression system can help overcome this challenge. Viral and non-viral delivery systems can be used for this particular expression of proteins in mammalian cells.
Cell-free Expression
Cell-free expression is ideal for the creation of difficult proteins like toxins, membrane proteins, peptides, and complexes. The expression is often conducted in cell-free extracts from various cellular origins. The reactions can be supplemented by different compounds like cofactors, ligands, chemicals, inhibitors, lipids, and detergents. However, cell-free technology is expensive.
Significance of Protein Production
Proteins play a critical role since they control all aspects of cellular life, and are also viewed as the major building blocks in molecules. They are used for countless processes and other proteins are produced constantly while others can only be expressed when they are required by different organs of the body.
Proteins Catalyze Reactions
Several chemical reactions take place in our bodies, and proteins play a crucial role in catalyzing them. Proteins are essential since they transport oxygen and nutrients to different body parts to enhance functionality. They also help in building blocks of organisms while simultaneously improving your immune system.
Wound Healing
When you are injured, have a broken bone, or burn, your body must be able to repair the damaged tissue without the interference of heavy doses of medicine. This can be possible through the production of more cells. Proteins help in the creation of more cells, which will build the damaged tissue. New cells will cover the open wound, protecting your body from infection, while at the same time replacing the dead cells. The proteins called cyclins are responsible for signaling the healing process to begin, and they also communicate with the cells about the right time to divide. DNA polymerase is another vital protein that promotes the healing of wounds. Your wounds may not heal properly if your body lacks these integral proteins. In the same vein, proteins promote the growth and development of your body.
Production of Enzymes
Other protein expression systems are capable of secreting cellulases and hemicellulases that can be used in the production of industrial enzymes meant for fermentation processes. Other enzymes are approved for bio-pharmaceutical and nutritional purposes.
Proteins play many roles in our bodies or any living organism. They help build and repair body tissues, promote metabolic reactions to take place, maintain pH balance, and keep your immune system strong. They also help transport nutrients and act as an energy source. These functions make protein one of the most crucial components for your health.
