PCPMer (Physical Chemical Property Based Motif Analyzer ) is a software package for determining conserved regions in multiple sequence alignments. The software represents each of the 20 naturally occuring amino acids by five quantitative descriptors and can detect motifs (short regions of significant conservation) in aligned sequences based on relative entropy or physicochemical similarity. It can be then used to search for related proteins in a protein sequence database and map the variability data on a 3D structure (to make a stereophysicochemical variability plot, or SVP). Such plots are particularly useful for identifying the spatial relationships of highly conserved or variable residues to one another.
M-GCAT is a tool for rapidly visualizing and aligning the most highly conserved regions in multiple (typically prokaryote) genomes. M-GCAT is based upon a highly efficient approach to anchor-based multiple genome comparison using a compressed suffix graph and thus can construct multiple genome alignment frameworks in closely related species usually in a few minutes. A couple of important limitations include (1) input sequences MUST be assembled, and (2) the comparison is reference-sequence biased.