Statistical molecular design of peptoid libraries
Anna Linusson, Svante Wold
Research Group for Chemometrics, Department of Organic Chemistry, Umeň University, S-901 87 Umeň, Sweden
Astra Hńssle AB, S-431 83 M÷lndal, Sweden
Statistical experimental design provides an efficient approach for selecting the building blocks to span the structural space and increase the information content in a combinatorial library. A set of renin-inhibitors, hexapeptoids, is used to illustrate the approach. Multivariate quantitative structure-activity relationships (MQSARs) were developed relating renin inhibition to the peptoid sequences variation, parametrized by the z-scales. By using the information from the models, the number of building block sets could be reduced from six to three. Using a statistical molecular design (SMD) reduces the number of compounds from more than 100 000 down to 90. A second SMD was used for comparison, based on less prior knowledge. This gave a reduction from over 2 billion to 120 compounds.
combinatorial chemistry, D-optimal design, PCA, peptoid libraries, PLS, QSAR, statistical molecular design