Recognition of gene promoter DNA sequence is difficult with the complex structure and the huge amount of data.In this paper
the positional densities of oligonucleotides are modeled by Gaussian mixture model.It can identify less frequent but important motifs
since the positional density is independent of the actual occurrence frequency of the oligonucleotide.These motifs generally correspond to the consensus sequences of transcription factor binding site.GMM is used as eukaryotic promoter LS-SVM kernel
which simplifies the LS-SVM as LS model.The algorithm is simplified and the computational complexity is decreased.The simulation results show the accuracy is improved compared with Bayesian classifier