WO2004031999A1 - 三次元構造活性相関法 - Google Patents
三次元構造活性相関法 Download PDFInfo
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- WO2004031999A1 WO2004031999A1 PCT/JP2003/012810 JP0312810W WO2004031999A1 WO 2004031999 A1 WO2004031999 A1 WO 2004031999A1 JP 0312810 W JP0312810 W JP 0312810W WO 2004031999 A1 WO2004031999 A1 WO 2004031999A1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/30—Prediction of properties of chemical compounds, compositions or mixtures
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/50—Molecular design, e.g. of drugs
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/70—Machine learning, data mining or chemometrics
Definitions
- the present invention relates to a 3D QSAR (Quantitative Structure-Activity Relationship) method for quantitatively analyzing the correlation between the steric structure of a compound and biological activity using a statistical method, and a program therefor.
- 3D QSAR Quantitative Structure-Activity Relationship
- a logical molecular design method using three-dimensional structure-activity relationship (3D QSAR) angle analysis / pharmacophore mapping is used.
- existing drugs are superimposed in a virtual space according to appropriate rules, and then the partial least squares of latent valuables (PLS) method, neural net (NN) method, or genetic algorithm (GA)
- PLA latent valuables
- NN neural net
- GA genetic algorithm
- Statistical processing is used to extract characteristics between various parameters such as biological activity, hydrophobicity, and electrostatic interaction.
- the obtained results can be displayed graphically, which makes it possible to visually recognize the parts (functional groups, three-dimensional structures) that contribute to the activity in the molecular structure, and to use the results as clues for molecular design. . It can also be applied to predicting the activity of newly designed molecules.
- the method of automatically extracting functional groups by a computer involves the problem that the method of selecting the type and number of functional groups to be superimposed includes software-dependent arbitrariness and the subjectivity of researchers. The title remained.
- the method using the evaluation function is ideal as a method for superimposing molecules, but the problem is that the calculation takes time. Therefore, the inventors of the present application are studying the development of a faster and less arbitrary molecular superposition method, which can be executed on a general PC and has a calculation speed 100 to 1000 times faster than before. A method was devised and reported (Kotani, T .; Hi gashiura, K. Rapid evaluation of molecul ar shape similarity index using pairwise calculation of the nearest atomic distances. J. Chem. Inf. Comput. Sci. 2002, 42, 58- 63.).
- the classical QSAR method typified by the Fujita-Hansch method uses multiple regression calculations in its analysis, using parameters such as the hydrophobic parameter ⁇ , electrostatic parameter ⁇ , and steric parameter Es assigned to functional groups.
- MRA Multiple Regression Analysis
- the compound group having a functional group with no parameter was not able to be analyzed by QSAR, and the analysis was possible only for the compound group having a relatively close structure and skeleton.
- the biggest disadvantage was that it could not be applied to three-dimensional QSAR analysis.
- CoMFA developed by Cramer et al. (Cramer II I, RD; Patterson, DE; Bunce, JD Comparative Molecular Field Analysis (CoMFA). 1. Effect of Shape on Binding of Steroids to Carrier Proteins. J. Am. Chem. So 1988 , 110, 5959-5967) focuses on the “field” around a drug molecule and performs QSAR analysis. CoMFA analysis assumes that the difference in the structure of each molecule is the difference in the "field” around the molecule, and that this affects the biological activity value. For this reason, as in the case of 3D QSAR methods other than CoMFA, it is necessary to appropriately overlap molecular structures in order to appropriately reflect structural differences in data.
- the steric interaction is calculated by the Lennard-Jones equation, and the electrostatic interaction is calculated by the Coulomb potential.
- This CoMFA field is calculated for each superimposed molecule, and is used as a three-dimensional structural descriptor of each molecule to statistically analyze the relationship with the activity value.
- the statistical analysis uses the PLS (Partial Least Square) method, and the calculated activity prediction formula represents the properties required for the drug molecule, and can be shown three-dimensionally.
- PLS Partial Least Square
- HINT HINT
- CoMFA analysis Kerman, GE; Semus, SF; Abraham, DJ HINT: a new method of empirical hydrophobic field calculation for CoMFA. J. Comput. Aided Mol. Des. 1991, 5, 545-552, Kellogg, GE; Abraham, DJ Hydrophobicity: isog ogP (o / w) more than the sum of its parts? Eur. J. Med. Chem. 2000, 35, 651-661.
- CoMFA calculations were performed using steric potentials, electrostatic potentials, and some additional fields, but similar calculations were performed using the Simi larity Index to calculate the “field”. It is carried out.
- CoMSIA has proposed improvements to some of the disadvantages of CoMFA.
- the Lennard-Jones potential used in CoMFA has a steep gradient near the van der Waals surface, so that the potential energy changes sharply at lattice points near the molecular surface. For this reason, the results may differ significantly due to small conformational changes in the molecule.
- the Lennard-Jones potential and Coulomb potential the lattice points existing on the atoms become singular points, and have a meaningless value such as infinity or infinity.
- the drawback is that the distance from the molecule to be cut off is different due to the difference.
- CoMSIA calculates the three-dimensional field 'electrostatic field' using the SEAL function used as a molecular superposition method (“SEAL function” t).
- SEAL function used as a molecular superposition method
- the HASL method differs from CoMFA and CoMSIA in that HASL generates lattice points at an interval of about 2 A in the region within the radius of the van der Waals of the molecule, and the physicochemical properties of the molecule at each lattice point after allocating, is one cormorant way your own fitting (Doweyko, AM Three-dimensional pharmacophores from binding data. J. Med. Chem. 1994, 37, 1769-1778, Guccione, S .; Doweyko, A.. Chen, H .; Barretta, GU; Balzano, F.
- 3D QSAR using 'multiconformer' al ignment the use of HASL in the analysis of 5-HT1A thienopyrimi dinone ligands. J. Comput. Aided Mol. Des. 2000, 14, 647-657.).
- HASL the number of grid points required is much smaller than that of CoMFA, CoMSIA, and MFA (provided by Accelrys Inc.), and it can be calculated with a normal PC.
- CoMFA and CoMSIA it has the same problem as CoMFA and CoMSIA in that the creation of the grid remains arbitrary.
- there is only one kind of HASL atom type in HAS and these can take only values of +1, 0, and -1 due to their physicochemical properties. QSAR analysis cannot be performed on derivatives for which the HASL atom type is not defined.
- This method is a 3D QSAR method that evaluates how many physical properties are required in the model, such as hydrogen bonds, electrostatic interactions, and hydrophobic pockets, required for expression of activity.
- DISCO DISCO
- Catalyst Apex_3D
- these calculation methods are sometimes used for superposition of derivatives for simplicity, they have the disadvantage that the results differ depending on how the physicochemical properties are defined.
- DISCO artin, YC; Bures, MG; Danaher, EA; DeLazzer, J .; Lico, I .; Pavlik, PA A fast new approach to pharmacophore mapping ana its application to dopaminergic and benzodiazepine agonists. J. Comput. Aided Mol.
- the traditional 3D QSAR method has the following disadvantages.
- results may differ depending on how the model compound is arranged at the lattice points.
- Step C of calculating the interaction eg, steric interaction, electrostatic interaction, hydrophobic interaction
- a fifth step B5 of ending the step B is included.
- the step B when the molecule superimposed in the virtual space has a ring structure or a functional group, the step B represents the ring structure or the functional group.
- the step B2 calculates the interatomic distance to the other atoms.
- the method includes a step B5 of ending the step B.
- a pseudo atom is assumed as a point representing a functional group, the number of "atoms" used in the calculation is reduced, and the amount of calculation required for 3D QSAR analysis can be reduced, and faster. Simple analysis becomes possible.
- a point representing a functional group may be appropriately determined according to the type of the functional group and the parameter to be used. That is, the point representing the functional group can be set at a position using a weighted average or a simple average in consideration of the center of the functional group and the atomic weight, and may be plural.
- a pseudo atom may be set at a position representative of the ring structure.
- the atom constituting the ring structure is left, and a pseudo atom is additionally set.
- the characteristics of the ring portion of the molecule can be taken into account, and a more favorable structure-activity relationship can be found.
- the position where the pseudo atom is set is the above functional group Can be set appropriately as in the case of setting a pseudo atom representing
- the present invention is also applicable to a three-dimensional structure-activity correlation method for extracting characteristics of a compound based on atomic coordinates of a plurality of molecules superimposed in a virtual space using a computer and visually displaying the extracted characteristics.
- a process C for calculating an interaction with each atom of a plurality of molecules superimposed on the representative point and a process D for statistically analyzing the interaction are executed.
- a fifth process B5 for terminating the process B is executed.
- the processing B of cluster-analysis further includes, if necessary, when the molecules superimposed in the virtual space have a ring structure or a functional group, the ring structure or the functional group A first process B 1 for imagining an atom at a position representing
- a second process B2 for identifying the two atoms that make up the distance If the calculated shortest interatomic distance is less than or equal to a predetermined threshold, two atoms having the shortest interatomic distance are deleted from the three-dimensional space, and the weighted average coordinates of the coordinates of the two atoms to be deleted are added to the two atoms.
- a fifth process B5 for terminating the process B is executed.
- the points at which the interaction is calculated are determined not by using lattice points but by performing cluster analysis using the atomic coordinates of molecules as a threshold. That is, the atomic coordinates of the molecules used in the calculation and the pseudo-atom coordinates set as necessary are extracted, and the xyz coordinates obtained by weighting the xyz coordinates of the atoms and pseudo-atom coordinates within a certain threshold are used. . By doing so, the results obtained are the same regardless of the arrangement of the molecules with respect to the xyz axes. Furthermore, since many coordinate points are generated in a portion where the structural change is large, the interval between the coordinate points is small in an area that is expected to contribute to the activity, while the coordinate point is small in an area that is not expected to significantly affect the activity. It can be expected that the interval will be wider.
- Electrostatic parameters correspond to all types of atoms by using the van der Waals radius and partial charges of electrons as they are, or by using pseudo coefficients derived from these values. it can.
- Known parameters can be applied to the hydrophobic parameter and the hydrogen bonding parameter.
- FIG. 1 is a flowchart showing an outline of the three-dimensional structure-activity relationship method according to the present invention.
- Fig. 2 Diagram showing the details of the cluster analysis (STEP2) in Fig. 1.
- Figure 3 Diagram showing the calculation process of the CoMFA method.
- Figure 4 Diagram showing the steroid derivative compound set used for superposition.
- FIG. 5 Visual representation of CoMSIA analysis results (steric interactions).
- Figure 7 Diagram showing representative points created based on the atomic coordinates of overlapping molecules.
- Figure 8 Diagram showing a representative point created by adding a new point (pseudo atom) to the center of the ring.
- Figure 9 Drafts showing the results of the PLS analysis using the fast overlay method.
- Figure 10 Diagram visualizing the results of the PLS analysis using the high-speed superposition method.
- Figure 12 Visualization of the contribution of the solid term in the results of PLS analysis using the SEAL evaluation formula.
- Fig. 13 Visualization of the contribution of the electrostatic term in the PLS analysis results using the SEAL evaluation formula.
- Figure 14 Graph showing the results of PLS analysis using the molecular similarity evaluation formula of Good et al.
- Figure 15 Visualization of the contribution of the standing term in the results of the PLS analysis using the evaluation formula of molecular similarity of Good et al.
- Figure 16 Visualization of the contribution of the electrostatic term to the results of the PLS analysis using the evaluation equation of molecular similarity of Good et al.
- Figure 17 Graph showing the results of PLS analysis using pseudo variables.
- Figure 18 A diagram visualizing the contribution of the solid term in the results of the PLS analysis using the pseudo variables.
- Figure 19 Visualization of the contribution of the electrostatic term to the results of the PLS analysis using pseudo variables.
- Fig. 20 Graph showing the results of PLS analysis using the SEAL evaluation formula with an atom in the center of the ring.
- Fig. 21 A diagram visualizing the contribution of the steric term in the results of PLS analysis using the SEAL evaluation formula with an atom set at the center of the ring.
- Fig. 22 A diagram that visualizes the contribution of the electrostatic term in the results of PLS analysis using the SEA evaluation formula with atoms set at the center of the ring.
- Fig. 23 Graph showing the results of PLS analysis using an evaluation formula for molecular similarity of Good et al.
- Fig. 24 A diagram in which atoms are provided at the center of the ring, and the contribution of steric terms is visualized in the results of PLS analysis using the evaluation formula of molecular similarity of Good et al.
- Fig. 25 Diagram showing the contribution of the electrostatic term to the results of the PLS analysis using the molecular similarity evaluation formula of Good et al.
- Figure 26 Visualization of the contribution of the hydrophobic term in the results of PLS analysis performed using the Gaussian evaluation formula with the hydrophobic parameters used in the SEAL method.
- Figure 27 Visualization of the contribution of the hydrophobic term in the results of PLS analysis using pseudo variables with the hydrophobic parameters used in the SEAL method.
- Figure 29 Visualization of the contribution of the hydrophobic term in the results of PLS analysis using pseudo-variables with the hydrophobic parameters used in the FLEXS method.
- Fig. 30 A diagram visualizing the contribution of the HSAL parameters to the results of PLS analysis using Gaussian-type evaluation formulas with the parameters used in HAS.
- Figure 31 Visualization of the contribution of HSAL parameters to the results of PLS analysis using pseudo variables with parameters used in HASL.
- Figure 32 PLS analysis using Audry's equation as a damping function, visualizing the contribution of the solid term.
- Figure 33 Visualization of the contribution of the solid term in the result of PLS analysis using Fauch0re's equation as a damping function.
- Fig. 34 PLS analysis using the modified Fauch0re equation as a damping function, visualizing the contribution of the solid term.
- Figure 35 PAL analysis using Gaussian function of SEAL The figure which visualized the contribution of.
- Figure 36 Visualization of the contribution of the solid term in the results of PLS analysis using pseudo variables.
- Fig. 37 Visualization of the contribution of the electrostatic term in the results of PLS analysis using Audry's equation as a damping function.
- Fig. 38 A diagram visualizing the contribution of the electrostatic term in the results of PLS analysis using Fauchdre's equation as a damping function.
- Figure 39 Visualization of the contribution of the electrostatic term in the results of PLS analysis using the modified Faucl ⁇ re equation as the damping function.
- Figure 40 Visualization of the contribution of the electrostatic term to the results of PLS analysis using the SEAL Gaussian function.
- Figure 41 Visualization of the contribution of the electrostatic term in the results of PLS analysis using pseudo variables.
- Fig. 42 PLS analysis using FLEXS parameters and Fauch0re's equation as a damping function.
- Figure 43 Visualization of the contribution of the hydrophobic term in the results of PLS analysis using the FLEXS parameters and the modified Fauch0re equation as an attenuation function.
- Fig. 4 4 PLS analysis using FLEXS parameters with SEAL's Gaussian function as the decay function, visualizing the contribution of the hydrophobic term.
- Fig. 4 5 A diagram visualizing the contribution of the hydrophobic term in the result of PLS analysis using the parameters of AlogP and Audry's equation as an attenuation function.
- Figure 46 Visualization of the contribution of the hydrophobic term in the results of PLS analysis using the AlogP parameters and the Fauch0re equation as an attenuation function.
- Figure 47 Visualization of the contribution of the hydrophobic term in the results of PLS analysis using the modified Fauch0re equation as an attenuation function using AlogP parameters.
- Figure 48 A diagram visualizing the contribution of the electrostatic term in the results of 3D QSAR of COX-2.
- Fig. 49 A diagram visualizing the contribution of the solid term in the result of 3D QSAR of COX-2.
- Figure 50 A diagram visualizing the contribution of the hydrophobic term in the results of 3D QSAR of COX-2.
- the structure-activity relationship method of the present invention is performed using a computer, and is realized by executing a program written in an appropriate programming language on the computer. is there.
- the program is recorded on various existing recording media such as CD-ROM, or provided through a communication line such as the Internet or a telephone line.
- FIG. 1 shows a schematic process of the structure activity correlation method according to the present invention.
- this structure-activity relationship method multiple molecules to be analyzed are superimposed in a virtual space (x, y, z coordinate space) (STEP1).
- a virtual space x, y, z coordinate space
- FIG. 2 (A) shows the three-dimensional structural data of both nitrobenzene 1 and methylvirol 2 molecules.
- both molecules are superimposed in the three-dimensional space of the virtual S, and a superimposition model 3 is created.
- the drawing shows a state where two molecules are superimposed, but the number of molecules is arbitrary.
- cluster analysis is performed on the superimposed molecules (STEP2).
- the atomic coordinates of two molecules superimposed in virtual space are first extracted. For example, as shown in Fig. 2 (B), only the coordinates of the atoms contained in two superimposed molecules (nitrobenzene and methylpyrrol) are extracted, and an atomic coordinate model 4 is created.
- the setting of the threshold value is arbitrary, for example, 0.75 A is used.
- the two atoms constituting the closest atom pair 5 are deleted from the virtual space, and Two fields Calculate the weighted average coordinates of the coordinates of the child (the coordinates between the two atoms), and create a representative atom 6 at the 3 ⁇ 41 weighted average coordinate (STEP3).
- the representative atom 6 is preferably weighted according to the number of atoms constituting the representative atom so as to be distinguished from atoms other than the representative atom in the subsequent calculation.
- a force capable of imagining a pseudo atom at a position representing the functional group when the molecules superimposed in the virtual space have a functional group, if necessary, a force capable of imagining a pseudo atom at a position representing the functional group.
- the number of “atoms” used in the calculation is reduced, and the amount of calculation required for 3D QSAR analysis can be reduced, enabling faster and easier analysis.
- Whether or not a point representing a functional group is set, and at which position it is set may be determined as appropriate according to the type of the functional group and the parameter used. That is, a point representing a functional group can be set at a position using a weighted average or a simple average in consideration of the center and the atomic weight of the functional group, and a plurality of points may be used.
- a pseudo atom may be set at a position representative of the ring structure.
- the atom constituting the ring structure is left, and a pseudo atom is additionally set.
- the position at which the pseudo atom is set can be appropriately set in the same manner as in the case of setting the pseudo atom representing the functional group.
- the newly created representative atom 6 is regarded as one atom, and in the same manner as described above, the interatomic distance between each atom and another atom is calculated, and the shortest interatomic distance is equal to or less than the threshold (or less than). In the case of, the two atoms constituting the shortest interatomic distance are deleted from the virtual space, and a new representative atom 6 is created.
- the creation of the representative atom 6 is repeatedly performed until the shortest interatomic distance becomes equal to or greater than the threshold, and an atom model 7 is created as shown in FIG. 2 (D).
- the coordinates of the representative atom 6 created as described above are referred to as “representative points”.
- the interaction between the representative point and the molecule is calculated using an appropriate evaluation function (STEP4).
- the steric interaction, electrostatic interaction, and hydrophobic interaction between each atom of the superimposed molecules and the representative point are calculated.
- three-dimensional interaction, electrostatic interaction Calculated using The steric interaction is described by Kotani, T .; Higashiura, K. Rapid evaluation of molecular shape similarity index using pairwi se ca lculation of the nearest atomic distances.J. Chem. Inf. Comput. Sci. The method of evaluating molecular similarity proposed in 2002, 42, 58-63.
- the hydrophobic interaction is based on the parameters of the FLEXS method (Lemmen, C .; Lengauer, T .; Klebe, G. FLEXS: a method for fast flexible ligand superposition. J. Med. Cnem. 1998, 41, 4502-4520). It can be suitably used.
- This “component” has properties that are very similar to the principal components calculated by principal component analysis, and when multiple components are extracted, each component is orthogonal. For this reason, activity prediction formulas can be created from data such as CoMFA that contains a large number of variables.
- the number of PLS components is determined by a reliability evaluation method called the leave-one-out method, and an activity prediction formula is constructed using the number of components necessary to create the most reliable activity prediction formula. Is performed.
- Example 1 The pseudo-atom was placed in the center of the ring as a representative position of the ring, and it was created by overlapping with the atomic coordinates (Example 2).
- the A) -C) method is the evaluation function used to calculate molecular similarity.
- 3D QSAR that takes account of not only the three-dimensional contribution but also the electrostatic contribution and hydrophobic interaction is possible for those for which parameters are reported.
- Method D) is an improved method of Method A and can perform 3D QSAR taking into account electrostatic interaction. It is possible to calculate these interactions by adding parameters such as hydrophobic interaction, hydrogen donor, and hydrogen acceptor.
- the number of representative points increased to 97 (see Fig. 8).
- the representative points obtained by cluster-one analysis are much smaller than the thousands of CoMFA and CoMSIA grid points. This not only shortened the time required for subsequent calculations, but also reduced the amount of PC memory used.
- CoMFA the interaction at the lattice points obtained by calculation is all potential energy (kcal / mol), so there was no need for scaling.
- CoMSIA and the present invention use descriptors with different units that are not potential energies such as logP, it is necessary to perform scaling to match the influence of each item such as hydrophobic term and electrostatic term . For this reason, block scaling was used in this method.
- Example 1 When a representative point is created based on the atomic coordinates of each overlapping molecule
- FIG. 10 shows a visualization of the results obtained by the calculation.
- the green part indicates a region where the activity is sterically enhanced, that is, the activity is enhanced by the presence of a bulky substituent, and the yellow part is the opposite, and the activity is attenuated by the presence of a bulky substituent. Indicates the area.
- Fig. 14 shows a graph of r 2 , q 2 , Hn-1) (g q 2 ) / (n-c) using the evaluation formula of molecular similarity of Good et al.
- the figures showing the contribution of the solid term and the electrostatic term (Fig. 15 and Fig. 16) were found to be significantly different from the previous three.
- Example 2 When a new point is added to the position representing the ring to create a representative point
- FIG. 23 shows graphs of r 2 , q 2 , and (n ⁇ 1) (1-q 2 ) n ⁇ c) using the evaluation formula of molecular similarity of Good et al.
- the figures showing the contribution of its solid and electrostatic terms are the same as in Example C (Fig. 24 and Fig. 25). It was found that the results were significantly different from those of the above.
- the value of the parameter depending on the atomic species is set to 0.5 if the position is within twice the threshold value. Is multiplied by 0, otherwise 0.
- the hydrophobicity contribution in the present invention was evaluated for a total of 6 techniques including the above-described combination of the hydrophobic parameter and the evaluation function.
- Equations 1-3 and the SEAL Gaussian function and pseudovariables were used as the decay function.
- the probe atom had a charge of 1 and an atomic radius of 1 A.
- cluster analysis was performed without adding pseudo atoms at positions representative of the ring.
- the threshold for creating a representative point was set at 0.75 A. At this time, 97 points were obtained as representative points.
- the interaction between the representative point and each atom used for the keratinaceous loin was performed using a combination of methods that gave good results among the methods that had been used so far.
- the method using SEAL's decay function (10; a method combining 11-B and 41-E to calculate steric, electrostatic and hydrophobic interactions) and the method using pseudo-variables (1 1 3D QSAR analysis was performed using two methods, that is, a method that combines steric, electrostatic and hydrophobic interactions with 6-J, 7-K, and 4-F.
- Table 2 shows the results of the present invention and the results of CoMFA and CoMSIA.
- CoMFA uses only the solid contribution for QSAR analysis.
- the three-dimensional terms in CoMSIA electrostatic term, such possible precise comparison for doing QSAR analysis using the three parameters of the sparse Mizuko Iga, q 2 is CoMFA, also obtained the same value as CoMSIA cage, r 2 is slightly better results at CoMSIA obtained.
- the parameters of the HASL method are parameters that include not only the hydrophobicity parameter but also the electron density, compared to the CoMSIA method, ⁇ was higher than that of the CoMSIA method, but a different figure was obtained.
- Fig. 30 In other words, when the decay function used in the SEAL method is used (5-E), a region where the positive HASL parameter enhances the activity appears near the 3rd and 17th side chains, and C A portion of the ring side chain that reduced the activity appeared. Positive HASL parameters are more likely to be negatively charged atoms with hydrophobic interactions, while negative parameters are more likely to be negatively charged atoms exhibiting hydrophobic interactions.
- MLP molecular hydrophobic field potential
- a region that is three-dimensionally unfavorable may appear in the vicinity of the preferred region. This makes it possible to specifically propose molecular synthesis candidates with higher accuracy than CoMFA or CoMSIA.
- any evaluation expression other than the above-mentioned existing evaluation expression can be used.
- the method using the SEAL evaluation formula (1-B) and the method using the pseudo-variable (1-D) are simple and good 3D QSAR methods that can be performed on a normal PC. It was shown that the provided method can be applied to efficient drug design.
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CA002501591A CA2501591A1 (en) | 2002-10-07 | 2003-10-07 | Three-dimensional structural activity correlation method |
EP03748737A EP1560133A4 (en) | 2002-10-07 | 2003-10-07 | THREE-DIMENSIONAL STRUCTURE ACTIVITY CORRELATION PROCEDURE |
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CN108416184B (zh) * | 2017-02-09 | 2020-06-16 | 清华大学深圳研究生院 | 化合物的3d展示方法和系统 |
CN113284565B (zh) * | 2021-05-18 | 2023-09-22 | 百度时代网络技术(北京)有限公司 | 信息处理的方法和装置 |
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Cited By (3)
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WO2007004643A1 (ja) * | 2005-07-04 | 2007-01-11 | Nippon Zoki Pharmaceutical Co., Ltd. | 3次元構造活性相関法と共に利用される分子重ね合わせ方法 |
JP2021140701A (ja) * | 2020-03-09 | 2021-09-16 | 株式会社豊田中央研究所 | 材料設計プログラム |
JP7303765B2 (ja) | 2020-03-09 | 2023-07-05 | 株式会社豊田中央研究所 | 材料設計プログラム |
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US20060080073A1 (en) | 2006-04-13 |
CN1703704A (zh) | 2005-11-30 |
CA2501591A1 (en) | 2004-04-15 |
JP4436759B2 (ja) | 2010-03-24 |
EP1560133A1 (en) | 2005-08-03 |
KR20050055752A (ko) | 2005-06-13 |
EP1560133A4 (en) | 2009-06-10 |
JPWO2004031999A1 (ja) | 2006-02-02 |
AU2003268780A1 (en) | 2004-04-23 |
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