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Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers – specifically polypeptides – formed from sequences of amino acids , which are the monomers of the polymer.
Protein folding is the physical process by which a protein, after synthesis by a ribosome as a linear chain of amino acids, changes from an unstable random coil into a more ordered three-dimensional structure. This structure permits the protein to become biologically functional.
Protein tertiary structure is the three-dimensional shape of a protein. The tertiary structure will have a single polypeptide chain "backbone" with one or more protein secondary structures, the protein domains. Amino acid side chains and the backbone may interact and bond in a number of ways. The interactions and bonds of side chains within a ...
Biomolecular structure is the intricate folded, three-dimensional shape that is formed by a molecule of protein, DNA, or RNA, and that is important to its function.The structure of these molecules may be considered at any of several length scales ranging from the level of individual atoms to the relationships among entire protein subunits.
A single protein subunit is highlighted. Chaperonins assist protein folding. Three possible representations of the three-dimensional structure of the protein triose phosphate isomerase. Left: All-atom representation colored by atom type. Middle: Simplified representation illustrating the backbone conformation, colored by secondary structure.
The first ribbon diagrams, hand-drawn by Jane S. Richardson in 1980 (influenced by earlier individual illustrations), [3] were the first schematics of 3D protein structure to be produced systematically. [3] [4] They were created to illustrate a classification of protein structures for an article in Advances in Protein Chemistry [5] (now ...
The primary structure (string of amino acids) of a protein ultimately encodes its uniquely folded three-dimensional (3D) conformation. [20] The most important factor governing the folding of a protein into 3D structure is the distribution of polar and non-polar side chains. [21]
Homology model of the DHRS7B protein created with Swiss-model and rendered with PyMOL. Homology modeling, also known as comparative modeling of protein, refers to constructing an atomic-resolution model of the "target" protein from its amino acid sequence and an experimental three-dimensional structure of a related homologous protein (the "template").