accessibility
mprap
mprap predicts the relative surface accessibility of a protein sequence. The predictor is optimized for membrane proteins.
The ELM Resource Structure Filter
This web service is useful for evaluating the location of candidate short regulatory sequences in proteins (linear motifs) which need to be accessible to interact with their ligand domains. The StructureFilter web-service calculates an accessibility score, secondary structure score and total score (as well as various other features) for each match of a regular expression or ELM in the query sequence for which structural information is available.