Peptides (version 2.4.6)

crucianiProperties: Compute the Cruciani properties of a protein sequence

Description

This function calculates the Cruciani properties of an amino-acids sequence using the scaled principal component scores that summarize a broad set of descriptors calculated based on the interaction of each amino acid residue with several chemical groups (or "probes"), such as charged ions, methyl, hydroxyl groups, and so forth.

Usage

crucianiProperties(seq)

Value

The computed average of Cruciani properties of all the amino acids in the corresponding peptide sequence. Each PP represent an amino-acid property as follows:

• PP2: Hydrophobicity,

• PP3: H-bonding

Arguments

seq

An amino-acids sequence

References

Cruciani, G., Baroni, M., Carosati, E., Clementi, M., Valigi, R., and Clementi, S. (2004) Peptide studies by means of principal properties of amino acids derived from MIF descriptors. J. Chemom. 18, 146-155.

Examples

crucianiProperties(seq = "QWGRRCCGWGPGRRYCVRWC")
#     PP1     PP2     PP3
#  -0.1130 -0.0220  0.2735