The Levels of Protein Structures Essay Example

The Levels of Protein Structures Essay Proteins, one of the four main classes of organic compounds, are a fundamental building block of life. They are involved in everything organisms do, and in most of the cell’s processes. Proteins are found everywhere in the cell, locations vary from being suspended in the cytoplasm to being embedded in the cell membrane. They provide support, store amino acids, transport substances within the cell and between cells, detect and respond to chemical signals, combat diseases, and monitor chemical reactions in the cell. They have extremely complex and intricate structures, and display considerable diversity. Proteins are a varied group of organic compounds essential to life due to their unique structure and functions. The synthesis of proteins gives insight into their composition and structure. Proteins are made of a vast variety of combinations of twenty different monomers called amino acids. These monomers can be assembled into polymers called polypeptides. Protein synthesis begins after transcription, when an mRNA molecule moves from the nucleus to the cytoplasm via the nuclear pores bearing coded instructions for the creation of a single protein. This messenger RNA interacts with a ribosome, an organelle consisting of proteins and rRNA that serves as the site of protein assembly. The ribosome is made of two subunits; the molecule of mRNA binds to one of these subunits, called the small ribosomal subunit. Binding to the subunit triggers the approach of a molecule of tRNA, which has an antiocodon complementary to the first of the mRNA’s codon. The tRNA picks up the amino acid specified by the instructions and attaches to the mRNA, and the other subunit, the large ribosomal subunit, binds to this, completing the ribosome structure. The next tRNA molecule, with an anticodon matching the second codon of the mRNA, arrives and once again attaches to the mRNA with an amino acid. The amino acids are bonded together using energy from ATP. Each We will write a custom essay sample on The Levels of Protein Structures specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on The Levels of Protein Structures specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on The Levels of Protein Structures specifically for you FOR ONLY $16.38 $13.9/page Hire Writer