Class II-selective histone deacetylase inhibitors. Part 2: Alignment-independent GRIND 3-D QSAR, homology and docking studies
作者:Rino Ragno、Silvia Simeoni、Dante Rotili、Antonella Caroli、Giorgia Botta、Gerald Brosch、Silvio Massa、Antonello Mai
DOI:10.1016/j.ejmech.2007.05.004
日期:2008.3
(Aryloxopropenyl)pyrrolyl hydroxamates were recently reported by us as first examples of class H-selective HDAC inhibitors and can be useful tools to probe the biology of such enzymes. Molecular modelling and 3-D QSAR studies have been performed on a series of 25 (aryloxopropenyl)pyrrolyl hydroxamates to gain insights about their activity and selectivity against both maize HD1-B and HD1-A, two enzymes homologous of mammalian class I and class II HDACs, respectively. The studies have been accomplished by calculating alignment-independent descriptors (GRIND descriptors) using the ALMOND software. Highly descriptive and predictive 3-D QSAR models were obtained using either class I or class II inhibitory activity displaying r(2)/q(2) values of 0.96/0.81 and 0.98/0.85 for HD1-B and HD1-A, respectively. A deeper inspection revealed that in general a bent molecular shape structure is a prerequisite for HD1-A-selective inhibitory activity, while straight shape molecular skeleton leads to selective HD1-B compounds. The same conclusions could be achieved by molecular docking studies of the most selective inhibitors. (c) 2007 Elsevier Masson SAS. All rights reserved.
(Aryloxopropenyl)pyrrolyl羟肟酸类化合物 recently reported by us are the first examples of class H-selective HDAC inhibitors and can serve as useful tools to investigate the biology of such enzymes. A series of 25 (aryloxopropenyl)pyrrolyl羟肟酸类 compounds were subjected to molecular modeling and 3-D QSAR studies to gain insights into their activity and selectivity against maize HD1-B and HD1-A, enzymes homologous to mammalian class I and class II HDACs, respectively. These studies were conducted using alignment-independent descriptors (GRIND descriptors) calculated with the ALMOND software. Highly descriptive and predictive 3-D QSAR models were obtained for both class I and class II inhibitory activities, with r²/q² values of 0.96/0.81 for HD1-B and 0.98/0.85 for HD1-A. Further analysis revealed that a bent molecular structure is generally a prerequisite for HD1-A-selective inhibition, while straight molecular skeletons lead to HD1-B-selective compounds. These conclusions were corroborated by molecular docking studies of the most selective inhibitors. (c) 2007 Elsevier Masson SAS. All rights reserved.