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glossary:ramachandran_plot [2008/08/07 14:47] cuff |
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+ | {{tag>other}} | ||
+ | ====== Ramachandran Plot ======= | ||
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+ | This is a diagram of the sterically allowed regions for a dipeptide unit in phi,psi | ||
+ | space. The conformation of the dipepetide is defined by 2 dihedral angles: | ||
+ | phi (the angle of rotation around the N-C-alpha bond in a peptide unit), | ||
+ | and psi (the angle of rotation around the | ||
+ | C-alpha-C' bond in a peptide unit). The plot indicates whether a given phi,psi | ||
+ | conformation is sterically allowed. A conformation is not allowed if atoms | ||
+ | approach closer than the sum of their van der Waals radii. The diagram is named | ||
+ | after G.N Ramachandran, who was the first to make calculations of the allowed regions | ||
+ | in protein structures. | ||
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+ | ===== References ===== | ||
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+ | {{pubmed>long:13990617}} | ||
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