Summary.
In the Post Genome Age, there is an urgent need to develop the reliable and effective computational methods to predict the subcellular localization for the explosion of newly found proteins. Here, a novel method of pseudo amino acid (PseAA) composition, the so-called “amino acid composition distribution” (AACD), is introduced. First, a protein sequence is divided equally into multiple segments. Then, amino acid composition of each segment is calculated in series. After that, each protein sequence can be represented by a feature vector. Finally, the feature vectors of all sequences thus obtained are further input into the multi-class support vector machines to predict the subcellular localization. The results show that AACD is quite effective in representing protein sequences for the purpose of predicting protein subcellular localization.
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Abbreviations
- AAC:
-
amino acid composition
- AACD:
-
amino acid composition distribution
- 5CV:
-
5-fold cross validation
- DAG:
-
directed acyclic graph
- DPC:
-
dipeptide composition
- KNN:
-
k-nearest neighbor
- OVO:
-
one-versus-one
- OVR:
-
one-versus-rest
- PPC:
-
polypeptide composition
- PseAA:
-
pseudo amino acid composition
- RBF:
-
radial basis function
- SVM:
-
support vector machines
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Authors’ address: Shao-Wu Zhang, College of Automation control, Northwestern Polytechnical University, 127 YouYi West Rd., Xi’an 710072, Shaanxi, China
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Shi, JY., Zhang, SW., Pan, Q. et al. Using pseudo amino acid composition to predict protein subcellular location: approached with amino acid composition distribution. Amino Acids 35, 321–327 (2008). https://doi.org/10.1007/s00726-007-0623-z
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DOI: https://doi.org/10.1007/s00726-007-0623-z