{"title":"Conversion of the Cambridge structural database to functional 3D daylight thor and MACCS-3D compatible databases","authors":"Michael A. Pleiss","doi":"10.1016/0898-5529(90)90157-4","DOIUrl":"10.1016/0898-5529(90)90157-4","url":null,"abstract":"<div><p>Conversion of the Cambridge Structural Database to compatible 3D Daylight Thor and <span>maccs-3d</span> databases has been accomplished with approximately 75% of the entries with fractional coordinates being successfully converted. This was achieved by novel use of the Daylight Chemical Information Systems, Inc. software package in order to integrate both the chemical and the crystallographic connectivities into a unique <span>smiles</span> representation complete with full hydrogen specification. Fractional crystallographic coordinates were converted to Daylight <span>tdt</span> (Thor datatree) files utilizing a modified version of InterCon (QCPE 598). The unique <span>smiles</span>, coupled with both 2D and 3D cartesian coordinates, as well as information from the corresponding bibliographic file, formed the basis of the Thor database. The unique <span>smiles</span> (with coordinates) is easily converted into either a <span>maccs-ii</span> or <span>maccs-3d</span> suitable molfile.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 549-556"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90157-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75294911","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":"Experiences building and searching the Chapman & Hall Dictionary of Drugs","authors":"Keith Davies, Roger Upton","doi":"10.1016/0898-5529(90)90165-5","DOIUrl":"10.1016/0898-5529(90)90165-5","url":null,"abstract":"<div><p>The Chapman and Hall <em>Dictionary of Drugs</em> is a source of information on over 6000 drugs and their derivatives. The printed form includes much physical and pharmacological data abstracted from patents as well as 2D drawings. The 2D connection tables were made available to Chemical Design and 3D structures were generated and stored in a ChemDBS-3D database. From the initial stored structure, the 3D conformational distance keys were generated in a second step. The computer resources used are presented and these indicate that scaling the automated build/keying procedures to include several 100,000s of compounds is a practical proposition. Some search examples are used to illustrate the screening effects of 3D key searches and the relative importance of using conformational flexibility in finding new hits.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 665-671"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90165-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86574672","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":"Let the proceeds go to the primary journals","authors":"W. Todd Wipke (Editor-in-Chief)","doi":"10.1016/0898-5529(90)90057-F","DOIUrl":"10.1016/0898-5529(90)90057-F","url":null,"abstract":"","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 305-306"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90057-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73673952","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}
Mark G. Bures , Charles W. Hutchins , Mary Maus , William Kohlbrenner , Sunil Kadam , John W. Erickson
{"title":"Using three-dimensional substructure searching to identify novel, non-peptidic inhibitors of HIV-1 protease","authors":"Mark G. Bures , Charles W. Hutchins , Mary Maus , William Kohlbrenner , Sunil Kadam , John W. Erickson","doi":"10.1016/0898-5529(90)90166-6","DOIUrl":"10.1016/0898-5529(90)90166-6","url":null,"abstract":"<div><p>The design of non-peptidic inhibitors of the human immunodeficiency virus type 1 (HIV-1) protease as potential therapeutic agents against AIDS has been the subject of intense research. Recently, the X-ray crystal structures of several HIV-1 protease/inhibitor complexes have been solved, including one that contains a C<sub>2</sub> symmetric inhibitor, A-74704. In this report, three-dimensional substructure searching, using the program ALADDIN, was used to identify novel, non-peptidic inhibitors of HIV-1 protease. Three-dimensional substructures, or patterns of atoms related by specific geometric constraints, were constructed based on an evaluation of the detailed interactions between A-74704 and the active site of the protease. The substructures included a functional replacement for the buried water molecule observed in the inhibitor/protease complex. Search targets based on these substructures were used to query several large databases of three-dimensional structures to identify small molecule structures with the potential to inhibit HIV-1 protease. Approximately thirty compounds were selected from those found in the searches and tested for HIV-1 protease inhibition. Three structurally-related non-peptidic compounds displayed inhibition in the 10 to 100 μM range. The identification of these compounds may represent an advance towards the <em>de novo</em> design of non-peptidic inhibitors of HIV-1 protease.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 673-680"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90166-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86910041","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":"Automated structure design in 3D","authors":"V.J. Gillet, A.P. Johnson, P. Mata, S. Sike","doi":"10.1016/0898-5529(90)90167-7","DOIUrl":"10.1016/0898-5529(90)90167-7","url":null,"abstract":"<div><p>A system is being developed, based on structure generation methods, for the design of molecules to fit a variety of constraints. The system is modular and uses techniques from artificial intelligence to solve general problems in molecule design. Heuristics are being developed based, in part, on the different kinds of constraints that might be available to the system, e.g., the shape and electrostatic nature of a cavity. The heuristics are then used to restrict the combinatorial explosion that is inherent in structure generation. The program has been tested using the <span>appa</span> binding site of Trypsin and a range of different structures that fit the site have been generated. Some of these structures are very closely related to <span>appa</span> and the predictive value of the program has also been demonstrated.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 681-696"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90167-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74173891","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}
Sergio Clementi ∗ , Gabriele Cruciani , Daniela Riganelli , Paolo Rovero ∗ , Vittorio Pestellini , Carlo Alberto Maggi , Massimo Baroni
{"title":"Chemometric approach to a QSAR study of peptides behaving as NK-2 receptor antagonists","authors":"Sergio Clementi ∗ , Gabriele Cruciani , Daniela Riganelli , Paolo Rovero ∗ , Vittorio Pestellini , Carlo Alberto Maggi , Massimo Baroni","doi":"10.1016/0898-5529(90)90065-G","DOIUrl":"10.1016/0898-5529(90)90065-G","url":null,"abstract":"<div><p>This paper shows the advantages of using chemometric strategies in QSAR of NKA analogues containing D-Tryptophan and behaving as highly selective NK-2 receptor antagonists: a) detecting the sequence with optimal antagonist activity, and b) having a strategy for selecting a few most informative sequences. The data set is included on disk as RVD .DAT.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 379-387"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90065-G","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82355947","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":"MMOL: A utility for importing MacroModel structure files into ChemText","authors":"Andrew C. Regan ∗ , Alan A. Smith","doi":"10.1016/0898-5529(90)90074-I","DOIUrl":"10.1016/0898-5529(90)90074-I","url":null,"abstract":"<div><p>The program MMOL reads MacroModel formatted structure files and converts them into MDL's MolFile format. The program is included on disk.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 507-509"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90074-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90088005","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":"Automatic knowledge base building for the organic synthesis design program (SECS)","authors":"Mikiro Yanaka , Kazuhiko Nakamura , Azusa Kurumisawa , W. Todd Wipke ∗","doi":"10.1016/0898-5529(90)90062-D","DOIUrl":"10.1016/0898-5529(90)90062-D","url":null,"abstract":"<div><p>SECS (Simulation and Evaluation of Chemical Synthesis) is a retrosynthetic organic synthesis design program. Building a large knowledge base is required in order to solve important synthesis problems in industry. We developed a method that automatically builds a large ALCHEM transform library. Fifteen thousand reactions have been built. These were modified and reorganized into a form usable by SECS. At the same time, we added an additional strategy generation function to the SECS strategy module. We present our method and an example of a SECS analysis of a target molecule using our large ALCHEM knowledge base.</p></div>","PeriodicalId":101214,"journal":{"name":"Tetrahedron Computer Methodology","volume":"3 6","pages":"Pages 359-375"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0898-5529(90)90062-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79676470","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}