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  • 5-HT  (1)
  • Computational chemistry  (1)
  • Coulombic energy  (1)
  • Histamine  (1)
  • 1
    ISSN: 1573-4951
    Keywords: Drug design ; Structure-activity relationships ; Electrostatic maps ; Surfaces ; XEDs ; Molecular mechanics ; Histamine ; 5-HT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The quality of molecular electrostatic maps generated by non-quantum mechanical methods has been improved using extended electron distributions. Further simplification has been achieved by distilling these maps down to their energy extrema. A new means of defining surface interaction has been added and the resulting composite map has been plotted for a limited number of low-lying conformers of a series of agonists and antagonists of the H2 and H3 receptors and 5-HT1A and 5-HT1D receptors. The results from the cross-comparison of these maps indicate their ability to distinguish the specific receptor. Interesting consequences of the method are that structural overlay is irrelevant, that several conformations may contribute to the overall binding pattern and that lesser pharmacological activities may be deduced from the results.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of computer aided molecular design 8 (1994), S. 653-668 
    ISSN: 1573-4951
    Keywords: Molecular mechanics ; Charge ; Coulombic energy ; Intermolecular interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Extended electron distributions (XEDs) have been added to the molecular mechanics Coulombic term and applied to a selection of intermolecular interactions. The results from this approach have been compared with the commonly used atom-centred charges and more rigorous AM1-derived natural atom orbital point densities. The use of XEDs generally improves the simulation of experimental and ab initio results over the other two charge allocations and corrects geometries in those cases for which the others yield wrong results.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of computer aided molecular design 1 (1987), S. 31-51 
    ISSN: 1573-4951
    Keywords: Molecular modelling ; Computational chemistry ; Drug design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An integrated molecular graphics and computational chemistry framework is described which has been designed primarily to handle small molecules of up to 300 atoms. The system provides a means of integrating software from any source into a single framework. It is split into two functional subsystems. The first subsystem, called COSMIC. runs on low-cost, serial-linked colour graphics terminals and allows the user to prepare and examine structural data and to submit them for extensive computational chemistry. Links also allow access to databases, other modelling systems and user-written modules. Much of the output from COSMIC cannot be examined with low level graphics. A second subsystem, called ASTRAL, has been developed for the high-resolution Evans & Sutherland PS300 colour graphics terminal and is designed to manipulate complex display structures. The COSMIC minimisers, geometry investigators, molecular orbital displays, electrostatic isopotential generators and various interfaces and utilities are described.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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