hydropathy plot

hydropathy plot
Approximate way of deducing the higher order structure of a protein, based on the principle that 20-30 consistently hydrophobic residues are necessary to make a membrane-spanning a-helix. For each amino acid residue, a weighted average of the hydrophobicity of the residue and its immediate neighbours are calculated and graphically displayed as a hydropathy plot, with hydrophobic domains plotted as positive numbers. There are several formulae for the calculation, that differ in the calculation of the moving average, the window size, and the scoring system for hydrophobicity of individual residues (eg. Kyte-Doolittle, Hopp Wood, Eisenberg).

Dictionary of molecular biology. 2004.

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