Systems and methods for rapid evaluation and design of molecules for predicted biological activity

• US 20040002052A1
• Filed: 10/23/2002
• Published: 01/01/2004
• Est. Priority Date: 10/23/2001
• Status: Abandoned Application

• Current Assignee: Pharmacogenetics Development Company, Inc.
• Original Assignee: Pharmacogenetics Development Company, Inc.
• Inventors: Hendry, Lawrence B.
• Application Number:
  US10/279,546
• Publication Number:
  US 20040002052A1
• Time in Patent Office: Days
• US Class Current: 435/1.1
• CPC Class Codes: G16B 15/00 ICT specially adapted for analysing two-dimensional or three-dimensional molecular structures, e.g. structural or functional relations or structure alignment
• CPC Class Codes: G16B 15/20 Protein or domain folding
• CPC Class Codes: G16B 20/00 ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations

Abstract

The computer-based systems and methods are for rapidly evaluating molecules for suspected biological activity and relative potency, and for designing molecules for desired biological activity. The systems and methods enable rapid screening of large molecular databases using one or more search engines designed to identify molecules predicted to possess specific biological activities.

Claims

1. A method of creating a search engine, comprising:

selecting a binding site within nucleic acid;

selecting a molecule having a known biological activity that fits with the binding site; and

defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) docking the molecule having the known biological activity with the binding site by evaluating electrostatic interactions between the molecule and the binding site within the nucleic acid, the electrostatic interactions defining a spatial;

(2) defining an included volume based on surfaces of the molecule that fit within the nucleic acid binding site; and

(3) defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

the search engine for using at least one of the spatial, the included volume, or the excluded volume in evaluating a potential biological activity of a molecule having an unknown biological activity.

2. The method as set forth in claim 1, wherein the spatial defines locations and charge characteristics of hydrogen bonds formed between the molecule having the known biological activity and the binding site within nucleic acid.

3. The method as set forth in claim 1, wherein the included volume comprises a Connolly surface.

4. The method as set forth in claim 1, wherein the excluded volume comprises a van der Waals surface of DNA.

5. The method as set forth in claim 1, wherein the molecule having the known biological activity comprises a plurality of molecules having the known biological activity.

6. The method as set forth in claim 1, further comprising using the search engine to evaluate the potential biological activity of the molecule having the unknown biological activity.

7. The method as set forth in claim 1, further comprising adjusting a distance within the included volume.

8. The method as set forth in claim 1, further comprising setting a number of conformations that the search engine performs in evaluating the molecule having the unknown biological activity.

9. The method as set forth in claim 1, wherein the search engine is configured to evaluate the molecule having the unknown biological activity using the spatial.

10. The method as set forth in claim 1, wherein the search engine is configured to evaluate the molecule having the unknown biological activity using the spatial followed by excluded volume.

11. The method as set forth in claim 1, wherein the search engine is configured to evaluate the molecule having the unknown biological activity using the spatial followed by included volume.

12. The method as set forth in claim 1, wherein the search engine is configured to evaluate the molecule having the unknown biological activity using the spatial followed by excluded volume followed by included volume.

13. The method as set forth in claim 1, wherein the search engine is configured to evaluate the molecule having the unknown biological activity using the included volume followed by the excluded volume.

14. A method of using a search engine to evaluate a potential biological activity of a molecule having an unknown biological activity, comprising:

selecting the search engine based on the biological activity to be evaluated, the search engine being formed by;

(a) selecting a binding site within nucleic acid;

(b) selecting a molecule having a known biological activity that fits with the binding site; and

(c) defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) docking the molecule having the known biological activity with the binding site by evaluating electrostatic interactions between the molecule having the known biological activity and the binding site within the nucleic acid, the electrostatic interactions defining a spatial;

(2) defining an included volume based on surfaces of the molecule having the known biological activity that fit within the nucleic acid binding site; and

(3) defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

selecting the molecule having the unknown biological activity; and

running the search engine using at least one of the spatial, the included volume, or the excluded volume to determine the potential biological activity of the molecule having the unknown biological activity.

15. The method as set forth in claim 14, wherein selecting the molecule having the unknown biological activity comprises selecting a database of molecules having the unknown biological activity.

16. The method as set forth in claim 14, further comprising configuring the search engine.

17. The method as set forth in claim 16, wherein configuring comprises adjusting tolerances associated with the included volume.

18. The method as set forth in claim 14, wherein running the search engine comprises running the search engine to evaluate the molecule having the unknown biological activity using the spatial.

19. The method as set forth in claim 14, wherein running the search engine comprises running the search engine to evaluate the molecule having the unknown biological activity using the spatial followed by excluded volume.

20. The method as set forth in claim 14, wherein running the search engine comprises running the search engine to evaluate the molecule having the unknown biological activity using the spatial followed by included volume.

21. The method as set forth in claim 14, wherein running the search engine comprises running the search engine to evaluate the molecule having the unknown biological activity using the spatial followed by excluded volume followed by included volume.

22. The method as set forth in claim 14, wherein running the search engine comprises running the search engine to evaluate the molecule having the unknown biological activity using the included volume followed by the excluded volume.

23. A system for creating a search engine, comprising:

means for selecting a binding site within nucleic acid;

means for selecting a molecule having a known biological activity that fits with the binding site; and

means for defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) means for defining a spatial by docking the molecule having the known biological activity with the binding site to evaluate electrostatic interactions between the molecule and the binding site within the nucleic acid, the electrostatic interactions defining the spatial;

(2) means for defining an included volume based on surfaces of the molecule that fit within the nucleic acid binding site; and

(3) means for defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

the search engine for using at least one of the spatial defining means, the included volume defining means, or the excluded volume defining means in evaluating a potential biological activity of a molecule having an unknown biological activity.

24. A computer-readable medium for storing software for use in performing a method of creating a search engine, the method comprising:

selecting a binding site within nucleic acid;

selecting a molecule having a known biological activity that fits with the binding site; and

defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) docking the molecule having the known biological activity with the binding site by evaluating electrostatic interactions between the molecule and the binding site within the nucleic acid, the electrostatic interactions defining a spatial;

(2) defining an included volume based on surfaces of the molecule that fits within the nucleic acid binding site; and

(3) defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

the search engine for using at least one of the spatial, the included volume, or the excluded volume in evaluating a potential biological activity of a molecule having an unknown biological activity.

25. A system for using a search engine to evaluate a potential biological activity of a molecule having an unknown biological activity, comprising:

means for selecting the search engine based on the biological activity to be evaluated, the search engine being formed by;

(a) selecting a binding site within nucleic acid;

(b) selecting a molecule having a known biological activity that fits with the binding site; and

(c) defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) docking the molecule having the known biological activity with the binding site by evaluating electrostatic interactions between the molecule having the known biological activity and the binding site within the nucleic acid, the electrostatic interactions defining a spatial;

(2) defining an included volume based on surfaces of the molecule having the known biological activity that fit within the nucleic acid binding site; and

(3) defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

means for selecting the molecule having the unknown biological activity; and

means for running the search engine using at least one of the spatial, the included volume, or the excluded volume to determine the potential biological activity of the molecule having the unknown biological activity.

26. The system as set forth in claim 25, further comprising means for accessing a database containing the molecule having the unknown biological activity.

27. The system as set forth in claim 26, further comprising the database.

28. A computer-readable medium for storing software for use in performing a method of using a search engine to evaluate a potential biological activity of a molecule having an unknown biological activity, the method comprising:

selecting the search engine based on the biological activity to be evaluated, the search engine being formed by;

(a) selecting a binding site within nucleic acid;

(b) selecting a molecule having a known biological activity that fits with the binding site; and

(c) defining search criteria forming part of the search engine, the search criteria comprising at least one of the following;

(1) docking the molecule having the known biological activity with the binding site by evaluating electrostatic interactions between the molecule having the known biological activity and the binding site within the nucleic acid, the electrostatic interactions defining a spatial;

(2) defining an included volume based on surfaces of the molecule having the known biological activity that fit within the nucleic acid binding site; and

(3) defining an excluded volume based on surfaces of the binding site that cannot be penetrated;

selecting the molecule having the unknown biological activity; and

running the search engine using at least one of the spatial, the included volume, or the excluded volume to determine the potential biological activity of the molecule having the unknown biological activity.

29. A method of designing a new molecule for a biological activity, comprising:

selecting a binding site within nucleic acid;

selecting an existing molecule having a known biological activity that fits with the binding site;

defining a molecular skeleton formed from at least one of the following;

(1) a spatial defined by docking the existing molecule having the known biological activity with the binding site to evaluate electrostatic interactions between the existing molecule and the binding site within the nucleic acid, the electrostatic interactions defining the spatial;

(2) an included volume defined by surfaces of the existing molecule that fit within the nucleic acid binding site; and

(3) an excluded volume defined by surfaces of the binding site that cannot be penetrated;

selecting at least two functional groups from a plurality of functional groups;

combining functional groups that were selected to form the new molecule; and

checking if the new molecule fits along the molecular skeleton;

wherein the new molecule has a potential for the biological activity if the new molecule fits along the molecular skeleton.

30. The method as set forth in claim 29, wherein selecting at least two functional groups comprises selecting more than two functional groups to form the new molecule.

31. The method as set forth in claim 29, wherein selecting at least two functional groups comprises selecting chemical structures.

32. The method as set forth in claim 29, wherein defining a molecular structure comprises forming the molecular skeleton from the spatial.

33. The method as set forth in claim 29, wherein defining a molecular structure comprises forming the molecular skeleton from the spatial and the included volume.

34. The method as set forth in claim 29, wherein defining a molecular structure comprises forming the molecular skeleton from the spatial and the excluded volume.

35. The method as set forth in claim 29, wherein defining a molecular structure comprises forming the molecular skeleton from the spatial, the included volume, and the excluded volume.

36. The method as set forth in claim 29, wherein defining a molecular structure comprises forming the molecular skeleton from the excluded volume and the included volume.

37. The method as set forth in claim 29, wherein selecting at least two functional groups and combining functional groups comprises:

combining the at least two functional groups to form a first portion of the new molecule;

checking if the first portion of the new molecule fits along a corresponding first portion of the molecular skeleton;

selecting at least one other functional group;

combining the at least one other functional group with the first portion of the new molecule to form the new molecule.

38. The method as set forth in claim 29, wherein selecting at least two functional groups and combining functional groups comprises:

combining the at least two functional groups to form a first portion of the new molecule;

selecting at least one other functional group; and

combining the at least one other functional group with the first portion of the new molecule to form the new molecule.