Advances in Mathematical Chemistry and Applications

Volume 1

by

Subhash C. Basak, Guillermo Restrepo, José L. Villaveces

DOI: 10.2174/97816080592871140101
eISBN: 978-1-60805-928-7, 2014
ISBN: 978-1-60805-929-4
ISSN: 2352-7668 (Print)



Indexed in: Book Citation Index, Science Edition, EBSCO.

“Advances in Mathematical Chemistry and Applications, Volume 1” highlights the emerging discipline of mathematical chemistry, or, more...[view complete introduction]
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The Use of Weighted 2D Fingerprints in Similarity-Based Virtual Screening

- Pp. 92-112 (21)

Shereena M. Arif, John D. Holliday and Peter Willett

Abstract

The fingerprints that are widely used for similarity-based virtual screening typically encode the presence or absence of fragments, without any indication as to their relative importance. This chapter discusses the use of weighted fingerprints, where each fragment is associated with a weight denoting its degree of importance in quantifying the degree of similarity between a reference structure and a database structure. Extensive studies using the World of Molecular Bioactivity and MDL Drug Data Report databases show that weighting fragments according to their frequency of occurrence within a molecule can increase the effectiveness of screening, but that this is not the case when fragments are weighted according to their frequency of occurrence within a database.

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