Editing Structural alignment (section)

==Data produced by structural alignment==

The minimum information produced from a successful structural alignment is a set of residues that are considered equivalent between the structures. This set of equivalences is then typically used to superpose the three-dimensional coordinates for each input structure. (Note that one input element may be fixed as a reference and therefore its superposed coordinates do not change.) The fitted structures can be used to calculate mutual RMSD values, as well as other more sophisticated measures of structural similarity such as the [[global distance test]] (GDT,<ref name="zemla"/> the metric used in [[CASP]]). The structural alignment also implies a corresponding one-dimensional [[sequence alignment]] from which a sequence identity, or the percentage of residues that are identical between the input structures, can be calculated as a measure of how closely the two sequences are related.