{"title":"Molecular Mechanics and Molecular Orbital Simulations on Specific Interactions between Peroxisome Proliferator-Activated Receptor PPAR and Plasticizers","authors":"Shingo Iwabuchi, Tomohiko Nakagawa, Haruhiko Nakamura, Yoko Yamaguchi, Tamie Nasu, N. Kurita","doi":"10.2751/JCAC.8.1","DOIUrl":"https://doi.org/10.2751/JCAC.8.1","url":null,"abstract":"ペルオキシゾーム増殖剤活性化受容体(Peroxisome proliferator-activated receptor : PPAR)は、リガンド依存的転写因子であり、最近の医学的研究により、多くの病気に関与することが明らかになっている。また、プラスチック類の可塑剤として使用されるフタル酸ジ-2-エチルヘキシル(DEHP)などのフタル酸エステル類は、PPARを誘導し、様々な毒性を発揮することが生理医学的研究により分かっている。本研究では、PPARのサブタイプであるPPARαとプラスチック可塑剤の特異的相互作用機構を原子・電子レベルで解明することを目的とし、PPARαとフタル酸エステル類及びアジピン酸エステルとの複合体の安定構造を、古典分子力場AMBERを用いて求めた。また、安定構造に対し、半経験的分子軌道法MOPACを用いて電子状態を計算した。これらの結果を基に、PPARαとフタル酸エステル類及びアジピン酸エステルの結合特性を解析し、マウスを用いた実験結果と比較した。","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Motoki Nakajima, Y. Sakuratani, Y. Noguchi, J. Yamada, Kenji Hori
{"title":"Development of Hydrolysis Prediction System Using Reaction Analysis with Quantum Chemical Calculation","authors":"Motoki Nakajima, Y. Sakuratani, Y. Noguchi, J. Yamada, Kenji Hori","doi":"10.2751/JCAC.8.103","DOIUrl":"https://doi.org/10.2751/JCAC.8.103","url":null,"abstract":"我々は,化審法における生分解性予測に新たな視点を加えるため,その変化物生成の主たる要因の一つである加水分解予測に,量子化学計算による反応解析から得られる活性化エネルギーを判断指標の一つとして用いることを検討している。この過程において,MOPACベースでの平易な活性化エネルギーの算出を可能とするインタフェースとして,加水分解予測システムを開発した。このシステムでは,遷移状態付近の構造探索を効率的に行うために,過去の計算結果を利用する置換基法を,加水分解反応に特化して応用しシステム化した。その結果,エステル酸加水分解反応について,市販の量子化学計算ソフトウェアのみを用いた反応解析に比べ,大幅に計算時間を短縮しつつ,MOPACベースでの活性化エネルギー計算結果が得られることが判明した。今後,DFT計算やab initio MO計算といった上位の計算手法との併用も視野に入れ,生分解性予測へ活用することを検討している。","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"103-113"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Hori, Hirotaka Sadatomi, Katsuhiko Okano, Michinori Sumimoto, Atsuo Miyamoto, S. Hayashi, Hidetoshi Yamamotoa
{"title":"An Attempt Method for Developing New Synthetic Routes by Fusing Computational Chemistry and Chemoinformatics: Syntheses of Ethyl and Benzyl Methacrylates","authors":"K. Hori, Hirotaka Sadatomi, Katsuhiko Okano, Michinori Sumimoto, Atsuo Miyamoto, S. Hayashi, Hidetoshi Yamamotoa","doi":"10.2751/jcac.8.12","DOIUrl":"https://doi.org/10.2751/jcac.8.12","url":null,"abstract":"In synthesizing target compounds, synthetic chemists search for and examine papers concerning syntheses to create their own synthetic routes. Synthetic route design system programs such as AIPHOS and EROS can also create many synthetic routes for targets compounds. However, it takes a long time to experimentally test all the routes created by these programs. Therefore, computational chemistry has been used to investigate mechanisms of chemical reactions which have already been examined experimentally. It is feasible to consider theoretical methods as effective in examining whether or not synthetic routes from chemoinformatics can be used practically for synthesizing target compounds. There are many difficulties associated with the aforementioned application, because theoretical calculations have to be done without information from experimental works. In the present study, we proved that this concept works well for synthetic routes of benzyl methacrylate, created from the KOSP and TOSP programs.","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Ikenaga, M. Hanaki, Michinori Sumimoto, Hiroshi Shigi, T. Nagaoka, K. Hori
{"title":"A Chemoinformatics Approach for Enantioseparation Mechanism of Amino Acids by Micellar Electrokinetic Chromatography Using Bile Acids","authors":"Y. Ikenaga, M. Hanaki, Michinori Sumimoto, Hiroshi Shigi, T. Nagaoka, K. Hori","doi":"10.2751/JCAC.8.69","DOIUrl":"https://doi.org/10.2751/JCAC.8.69","url":null,"abstract":"","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"69-74"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2751/JCAC.8.69","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Sengoku, Shin-ichiro Miyahara, Hajime Wakabayashi, H. Sekino
{"title":"The Predictive Accuracies of Spectroscopic Parameters in Biological Macromolecules by Fragment MO Method","authors":"Y. Sengoku, Shin-ichiro Miyahara, Hajime Wakabayashi, H. Sekino","doi":"10.2751/JCAC.8.85","DOIUrl":"https://doi.org/10.2751/JCAC.8.85","url":null,"abstract":"The Fragment-Molecular-Orbital (FMO) method is an approximate quantum chemical method for huge systems like biological macromolecules and is known to provide not only an accurate total energy but also properties of the system with sufficient precision compared with conventional first principle methods. In the present study we report the spectroscopic properties such as dipole moment, polarizability and their derivatives by the FMO in order to examine the accuracy of the method in predicting IR and Raman spectroscopies of biological macromolecules. The results show the promising features of the method as a theoretical tool in the spectroscopic study of large bio-systems.","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"85-91"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structure Optimization of Gas Separation Membrane Module","authors":"Takuro Nishimura, K. Funatsu","doi":"10.2751/JCAC.8.92","DOIUrl":"https://doi.org/10.2751/JCAC.8.92","url":null,"abstract":"ガスの膜透過現象を扱えるように拡張された数値流体力学(CFD)による、分離膜モジュールの性能シミュレーションシステムを開発した。このシステムでは、分離膜面積に依存した性能予測だけではなく、分離膜表面での濃度分極や、モジュール内部のガスの流動状態を反映させた性能評価により、分離膜モジュールの構造パラメータによる分離モジュールの性能比較が可能となった。その結果、分離膜モジュールの分離性能は、分離膜エレメントの配置パターンの影響が大きいことが明らかとなり、分離膜面積が比較的小さい場合でも、分離モジュールの体積を小さくコンパクトにした分離モジュールの中に、分離効率に優れたモジュールが存在することを確認した。さらに、分離エレメントの太さと分離エレメントの配置間隔の関係が、分離モジュールの性能に及ぼす影響も明らかとなった。","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"92-102"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simulation System for Structure Optimization of Hydrogen Separation Membrane Module","authors":"Takuro Nishimura, K. Funatsu","doi":"10.2751/JCAC.8.50","DOIUrl":"https://doi.org/10.2751/JCAC.8.50","url":null,"abstract":"In the hydrogen production through the steam reforming reaction of the methane, the technology of the separation and purification influences the production cost of hydrogen directly. We have developed the simulation system concerning the structure design of the separation module in order to take out hydrogen with high purity. This system uses computational fluid dynamics (CFD) engine developed for the simulation of gas permeation through membranes. It can simulate the performance of the separation membrane module by considering the calculated gas stream with the aid of CFD at the stage of complex modular design. The purpose of this system is to propose the modular structure parameter set in order to attain the best separation performance of the module at the design stage of the separation membrane module. The calculated results showed that the optimization of the structural parameter combined with CFD simulation was important for the design of the separation membrane module with high efficiency.","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"50-58"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Keisuke Nagase, Hiroshi Kobayashi, Noboru Nagata, F. Yamamoto, T. Natsume, Kenichi Dedachi, T. Tsukamoto, N. Kurita
{"title":"Analysis of Cancer Invasion Mechanism by Cellular Simulation","authors":"Keisuke Nagase, Hiroshi Kobayashi, Noboru Nagata, F. Yamamoto, T. Natsume, Kenichi Dedachi, T. Tsukamoto, N. Kurita","doi":"10.2751/JCAC.8.75","DOIUrl":"https://doi.org/10.2751/JCAC.8.75","url":null,"abstract":"癌細胞の浸潤には様々な蛋白質分解酵素が関与している。本研究では、これらの酵素の役割を明確にするため、細胞シミュレータ E-CELL を用いて、癌浸潤機構のモデルを新たに開発した。このモデルを用いて、5種類の癌細胞の浸潤特性を解析し、実験結果と定性的に一致する結果を得た。その結果、癌細胞の浸潤には、癌細胞が産生する urokinase-type plasminogen activator ( uPA )と癌細胞膜上に存在する活性型受容体 uPA receptor の結合が重要であることが、明らかになった。","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"75-84"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hiroyuki Matsuda, H. Yamamoto, Kiyofumi Kurihara, K. Tochigi
{"title":"Prediction of The Ionic Conductivity and Viscosity of Ionic Liquids by QSPR Using Descriptors of Group Contribution Type","authors":"Hiroyuki Matsuda, H. Yamamoto, Kiyofumi Kurihara, K. Tochigi","doi":"10.2751/JCAC.8.114","DOIUrl":"https://doi.org/10.2751/JCAC.8.114","url":null,"abstract":"Predictive models for representing the ionic conductivity and viscosity of ionic liquids (ILs) were constructed using a polynomial expansion model, coupled with descriptors of group contribution type. These equations could be applied to cations of alkyl amine, pyrole, piperidine, pyridine, imidazole and pyrazole, with the following anions: TFSI, Br, Cl, PF6, BF4, CF3SO3, CF3BF3, and C2F5BF3. To determine coefficients in non-linear equations, genetic algorithms were adapted. Calculated results gave good correlation accuracy of ionic conductivity and viscosity. An examination of the predictive performance was also attempted by comparing the calculated with experimental values not used for the determination of the parameters.","PeriodicalId":41457,"journal":{"name":"Journal of Computer Aided Chemistry","volume":"8 1","pages":"114-127"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2751/JCAC.8.114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69257419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}