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Prediction of functionally important sites from protein sequences using sparse kernel least squares classifiers.

Abstract：

:Identification of functionally important sites (FIS) in proteins is a critical problem and can have profound importance where protein structural information is limited. Machine learning techniques have been very useful in successful classification of many important biological problems. In this paper, we adopt the sparse kernel least squares classifiers (SKLSC) approach for classification and/or prediction of FIS using protein sequence derived features. The SKLSC algorithm was applied to 5435 FIS that have been extracted from 312 reliable alignments for a wide range of protein families. We obtained 68.28% sensitivity and 68.66% specificity for training dataset and 65.34% sensitivity and 66.88% specificity for testing dataset. Further, large scale benchmarking study using alignments of 101 protein families containing 1899 FIS showed that our method achieved an average approximately 70% sensitivity in predicting different types of FIS, such as active sites, metal, ligand or protein binding sites. Our findings also indicate that active sites and metal binding sites are comparably easier to predict compared to the ligand and protein binding sites. Despite moderate success, our results suggest the usefulness and potential of SKLSC approach in prediction of FIS using only protein sequence derived information.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Tang K,Pugalenthi G,Suganthan PN,Lanczycki CJ,Chakrabarti S

doi

10.1016/j.bbrc.2009.04.096

subject

Has Abstract

pub_date

2009-06-26 00:00:00

pages

155-9

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(09)00796-7

journal_volume

384

pub_type

杂志文章

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