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Ribbon diagrams, also known as Richardson diagrams, are 3D schematic representations of protein structure and are one of the most common methods of protein depiction used today. The ribbon depicts the general course and organisation of the protein backbone in 3D and serves as a visual framework for hanging details of the entire atomic structure ...
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. A single amino acid monomer may also be called a residue, which indicates a repeating unit of a polymer.
The complementarity plot has been largely inspired by the Ramachnadran Plot in its design (but not in its physicochemical attributes). Ramachandran Plot is deterministic in nature, in contrast, CP is probabilistic. Ramachandran plot deals with main-chain torsion angles and errors in such parameters are essentially locally restricted.
The description of a protein three dimensional structure as a network of hydrogen bonding interactions (HB plot) [12] was introduced as a tool for exploring protein structure and function. By analyzing the network of tertiary interactions, the possible spread of information within a protein can be investigated.
Ramachandran plot - validate the torsion angles of a protein chain. Kleywegt plot - examine differences between the torsions of NCS-related chains. Incorrect chiral volumes - check for chiral centres with the wrong handedness. Unmodelled blobs - check for electron density not accounted for by existing atoms.
Backbone-dependent rotamer library for serine.Each plot shows the population of the χ 1 rotamers of serine as a function of the backbone dihedral angles φ and ψ. In biochemistry, a backbone-dependent rotamer library provides the frequencies, mean dihedral angles, and standard deviations of the discrete conformations (known as rotamers) of the amino acid side chains in proteins as a function ...
For instance, the small strip of allowed values along the lower-left edge of the plot are a continuation of the large, extended-chain region at upper left. A Ramachandran plot generated from human PCNA, a trimeric DNA clamp protein that contains both β-sheet and α-helix (PDB ID 1AXC). The red, brown, and yellow regions represent the favored ...
The protein chain runs upwards, i.e., its N-terminus is at the bottom and its C-terminus at the top of the figure. Note that the sidechains point slightly downwards , i.e., towards the N-terminus. A 3 10 helix is a type of secondary structure found in proteins and polypeptides.
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