Reference Methods (URL) Features
Chou  et al. [8] CDA AAC
Chou [9] CDA AmPseAAC
Shah et al. [2] BLAST, FASTA Sequence information
Audit et al. [14] BLAST Sequence information
Tian et al. [6] PSI-BLAST Sequence and function information
Espadaler et al. [7] PSI-BLAST and BLAST Sequence information and protein interactions
Otto et al. [16] BLASTp and HMMer Sequence information
Galperin et al. [17] PSI-BLAST Sequence information
Chou et al. [10] Statistical analysis PseAAC
Bray et al. [25] Statistical analysis Structural and sequence properties
Munteanu et al. [19] Statistical analysis Structural properties and AAC
Cai et al. [31] NN Domain composition (GO) and  PseAAC
Cai et al. [4] NN Domain composition (interPro)
EzyPred [34] NN( http://www.csbio.sjtu.edu.cn/bioinf/EzyPred/) Domain composition (Pfam) and Evolutionary information
Nasibov et al. [42] K-NN AAC
Huang et al. [41] AFK-NN AmPseAAC
Chou et al. [30] ISort Domain composition (GO) and AmPseAAC
Cai et al. [32] ISort Domain composition (interPro) and PseAAC
Borro et al. [53] Bayesian Structural information
Levy et al. [54] Bayesian Sequence information
Detect [55] Bayesian Sequence information
Latino et al. [52] SOM Physicochemical and topology descriptors
SVMProt [43,44] SVM (http://jing.cz3.nus.edu.sg/cgi-bin/svmprot.cgi) AAC
ECS [33] SVM ( http://pcal.biosino.org/enzyme_classification.html) Domain composition (Pfam)
Dobson et al. [18] SVM Structural properties
ASC [20] SVM (http://asc.informatik.uni-tuebingen.de) Structural and sequence properties
SPSearch [38] SVM ( http://adios.tau.ac.il/SPSearch/) Specific peptides ( MEX[38])
Qiu et al. [46] SVM PseAAC
Wang et al. [48] SVM AAC and Neighbor relationships
Shi et al. [47] SVM PseAAC
Almonacid et al. [28] Tanimoto coefficients and similarity search Structural information
Almonacid et al. [29] Tanimoto coefficients and similarity search Structural information
Kristensen et al. [27] Structure template matching Structural information (Evolutionary)
Kato et al. [23] Structure template matching Structural properties
Concu et al. [21] LDA and ANN Structural information
Concu et al. [22] LDA and ANN (http://miaja.tic.udc.es/Bio-AIMS/EnzClassPred.php) Structural information
Astikainen et al. [49] HM3 algorithm String kernels
DME [39] MEX [38] ( http://adios.tau.ac.il/DME/) Specific peptides ( MEX[38])
Liewlom et al. [40] Mutation control Reactive motifs
Izrailev et al. [24] Nearest neighbor distance Ligand interactions
EFICAz [60] Ensemble Sequence similarity, Pfam and Prosite patterns
EFICAz2 [61] Ensemble (http:/cssb.biology.gatech.edu/skolnick/webservice/EFICAz2/index.html) Sequence similarity, Pfam and Prosite patterns
Umar et al. [62] Ensemble Sequence and structure information
Kumar et al. [63] Ensemble Sequence information
Wang et al. [65] Ensemble AAC and Neighbor relationships


AAC: Amino Acid Composition
AFK-NN: Adaptive fuzzy k-NN
AmPseAAC: Amphiphilic Pseudo Amino Acid Composition
ANN: Artificial Neural Network
CDA: Covariant Discriminant Algorithm
Hierarchical Max-Margin Markov algorithm
ISort: Intimate Sort predictor
LDA: Linear Discriminant Analysis
NN: Nearest Neighbor predictor
MEX [38]: Motif Extraction algorithm
SVM: Support Vector Machine
Table 1: Enzyme classification work grouped by methods used.