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2014 ; 54
(5
): 1512-23
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Prediction of linear cationic antimicrobial peptides based on characteristics
responsible for their interaction with the membranes
#MMPMID24730612
Vishnepolsky B
; Pirtskhalava M
J Chem Inf Model
2014[May]; 54
(5
): 1512-23
PMID24730612
show ga
Most available antimicrobial peptides (AMP) prediction methods use common
approach for different classes of AMP. Contrary to available approaches, we
suggest that a strategy of prediction should be based on the fact that there are
several kinds of AMP that vary in mechanisms of action, structure, mode of
interaction with membrane, etc. According to our suggestion for each kind of AMP,
a particular approach has to be developed in order to get high efficacy.
Consequently, in this paper, a particular but the biggest class of AMP, linear
cationic antimicrobial peptides (LCAP), has been considered and a newly developed
simple method of LCAP prediction described. The aim of this study is the
development of a simple method of discrimination of AMP from non-AMP, the
efficiency of which will be determined by efficiencies of selected descriptors
only and comparison the results of the discrimination procedure with the results
obtained by more complicated discriminative methods. As descriptors the
physicochemical characteristics responsible for capability of the peptide to
interact with an anionic membrane were considered. The following characteristics
such as hydrophobicity, amphiphaticity, location of the peptide in relation to
membrane, charge density, propensities to disordered structure and aggregation
were studied. On the basis of these characteristics, a new simple algorithm of
prediction is developed and evaluation of efficacies of the characteristics as
descriptors performed. The results show that three descriptors, hydrophobic
moment, charge density and location of the peptide along the membranes, can be
used as discriminators of LCAPs. For the training set, our method gives the same
level of accuracy as more complicated machine learning approaches offered as CAMP
database service tools. For the test set accuracy obtained by our method gives
even higher value than the one obtained by CAMP prediction tools. The AMP
prediction tool based on the considered method is available at
http://www.biomedicine.org.ge/dbaasp/.