title: Mining HIV protease cleavage data using genetic programming with a sum-product function.
abstract: BACKGROUND
  In order to design effective HIV inhibitors, studying and understanding the mechanism of HIV protease cleavage specification is critical. Various methods have been developed to explore the specificity of HIV protease cleavage activity. However, success in both extracting discriminant rules and maintaining high prediction accuracy is still challenging. The earlier study had employed genetic programming with a min-max scoring function to extract discriminant rules with success. However, the decision will finally be degenerated to one residue making further improvement of the prediction accuracy difficult. The challenge of revising the min-max scoring function so as to improve the prediction accuracy motivated this study.
  
  
  RESULTS
  This paper has designed a new scoring function called a sum-product function for extracting HIV protease cleavage discriminant rules using genetic programming methods. The experiments show that the new scoring function is superior to the min-max scoring function.
  
  
  BACKGROUND
  The software package can be obtained by request to Dr Zheng Rong Yang.
authors.affiliation: Department of Computer Science, Exeter University, UK. z.r.yang@ex.ac.uk <z.r.yang@ex.ac.uk>
authors.forename: Zheng Rong
authors.initials: ZR
authors.lastname: Yang
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Dalby
authors.forename: Jing
authors.initials: J
authors.lastname: Qiu
mesh_terms: D000465:Algorithms; D000595:Amino Acid Sequence; D001665:Binding Sites; D003198:Computer Simulation; D015195:Drug Design; D004789:Enzyme Activation; D004791:Enzyme Inhibitors / Q000737:chemistry; D016333:HIV Protease / Q000737:chemistry*; D017320:HIV Protease Inhibitors / Q000737:chemistry*; D008956:Models, Chemical; D008969:Molecular Sequence Data; D009716:Numerical Analysis, Computer-Assisted; D011485:Protein Binding; D025941:Protein Interaction Mapping / Q000379:methods*; D020539:Sequence Analysis, Protein / Q000379:methods*; D013329:Structure-Activity Relationship
chemical_list: D004791:Enzyme Inhibitors; D017320:HIV Protease Inhibitors; D016333:HIV Protease