IP Library Patent Application 13094663
Patent Application
App. No. 13/094,663

USE OF COMPUTATIONALLY DERIVED PROTEIN STRUCTURES OF GENETIC POLYMORPHISMS IN PHARMACOGENOMICS FOR DRUG DESIGN AND CLINICAL APPLICATIONS

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Patent No.
US None
App. No.
13/094,663
Abstract

Provided herein are computer-based methods for generating and using three-dimensional (3-D) structural models of target biomolecules. In particular, the target biomolecules are protein structural variants derived from genes containing genetic variations, or polymorphisms. The models are generated using molecular modeling techniques, such as homology modeling. The models can be used in structure-based drug design studies to identify drugs that bind to particular structural variants in structure-based drug design studies, for designing allele-specific drugs, population-specific drugs and for predicting clinical responses in patients. Molecular structure databases containing protein structural variant models also are provided.

Claims (33)

1 . A computer-based method for predicting clinical responses in patients based on genetic polymorphisms, comprising:

using a computer to identify proteins that are the products of a gene in the genome of patients, the gene exhibiting genetic polymorphisms,

obtaining from a computer amino acid sequences of the proteins that are the products of a gene in the genome of patients, the gene exhibiting genetic polymorphisms,

using a computer to construct 3-dimensional (3-D) protein structural variant models for the proteins that are the products of a gene in the genome of patients, the gene exhibiting genetic polymorphisms, wherein the 3-D model is obtained by a method selected from the group consisting of experimental methods, searching protein structure databases, homology modeling by comparison to an existing protein family member sequence and structure, and combinations thereof;

using a computer to perform energetic or dynamic refinement of the 3-D protein structural variant models;

using a computer to dock drugs against the protein structural variant models coded by the genome of the patients, the drugs having known activity;

building a computer-based relational database based on refined protein structural variants and observed clinical data associated with particular polymorphisms exhibited in the patients, wherein the database comprises: 3-D molecular coordinates for structural variant-drug complex models; and observed clinical data associated with the genetic polymorphisms,

using a computer to screen or compare a 3-D model of a protein from the patient to the structures contained in the computer-based database by:

identifying structures in the computer-based database that are similar to the 3-D model of the protein from the patient;

using a computer to predict a clinical outcome for the patient using the clinical data associated with the identified structures and variant-drug complex models, including the step of:

using a computer to compare free energy changes between a wild type and the protein structural variant models coded by the genome of the patients; and

outputting the result of the method to a computer interface display.

2 . The method of claim 2 , further comprising: providing the computer-based relational database with a molecular graphics interface that interfaces with the computer-based relational database for 3-D molecular structure visualization; providing the computer-based relational database with functionality that interfaces with the computer-based relational database for protein sequence and structural analysis; and providing the computer-based database with searching tools that interface with the computer-based relational database.

3 . The method of claim 1 , wherein the computer-based relational database further comprises 3-D molecular structural data of structural variant models.

4 . The method of claim 2 , wherein the computer-based relational database further comprises 3-D molecular structural data of structural variant models.

5 . A computer-based method for predicting clinical responses in patients based on genetic polymorphisms, comprising:

using a computer to construct a 3-D protein model based on a gene sequence in the genome of patients, the gene exhibiting polymorphisms, wherein the 3-D model is obtained by a method selected from the group consisting of experimental methods, searching protein structure databases, homology modeling by comparison to an existing protein family member sequence and structure, and combinations thereof;

using a computer to perform energetic or dynamic refinement of the 3-D protein model;

using a computer to dock drugs against protein structural variant models coded by the genome of the patients, the drugs having known activity;

using a computer to screen or compare the 3-D model of the protein from the patient to the 3-D structures contained in a computer-based relational database of 3-D protein structures by:

identifying structures in the computer-based relational database that are similar to the model of the protein derived from the patient;

using a computer to predict a clinical outcome for the patient based on clinical data associated with the identified structures and a drug interaction, including the step of:

using a computer to compare free energy changes between a wild type and the protein structural variant models coded by the genome of the patients; and

outputting the result of the method to a computer interface display.

6 . The method of claim 5 , wherein the step of determining a 3-D protein model is performed by a method selected from the group consisting of experimental methods, searching computer-based protein structure databases, homology modeling by comparison to a protein family member sequence and structure, computational protein structure prediction and combinations thereof.

7 . The method of claim 5 , wherein the step of determining a 3-D protein model is performed by homology modeling.

8 . The method of claim 1 , wherein the proteins that are the products of a gene exhibiting genetic polymorphisms are proteases.

9 . The method of claim 5 , wherein the gene that encodes polymorphisms is a protease gene.

10 . The method of claim 1 further comprising designing a new drug for a patient exhibiting a particular genetic polymorphism.

11 . The method of claim 1 further comprising selecting a drug therapy for a patient exhibiting a particular genetic polymorphism.

12 . The method of claim 1 wherein the step of performing energetic refinement comprises performing molecular mechanics calculations or molecular dynamics simulations.

13 . The method of claim 1 wherein the step of performing dynamic refinement comprises using a simulated annealing protocol.

14 . The method of claim 5 wherein the step of performing energetic refinement comprises performing molecular mechanics calculations or molecular dynamics simulations.