Abstract
Introduction: Androgen Receptor (AR) plays a pivotal role in the development of male sex and contributes to prostate cancer growth. Different from other nuclear receptors that bind to the co-regulator LxxLL motif in coregulator peptide interaction, the AR Ligand Binding Domain (LBD) prefers to bind to the FxxLF motif. BUD31, a novel co-regulator with FxxLF motif, has been demonstrated to suppress wild-type and mutated AR-mediated prostate cancer growth.
Methods: To find out the interaction mechanisms of BUD31 with WT/T877A/W741L AR complex, molecular dynamics simulations were employed to study the complex BUD31 and WT/mutant ARs. The molecular mechanics Poisson-Boltzmann surface area (MM-PBSA) results demonstrated that T877A and W741L point mutations can reduce the binding affinity between BUD31 and AR. The RMSF and dynamic cross-correlation analysis indicated that amino acid point mutations can affect the motions of loop residues in the AR structure. Results: These results indicated that AR co-regulator binding site AF2 can serve as a target for drug discovery to solve the resistance problem.Keywords: BUD31; Androgen receptor, AF2 binding site, interaction mechanism, molecular dynamics, co-regulator.
Graphical Abstract
[http://dx.doi.org/10.1210/jc.2003-030261] [PMID: 12970260]
[http://dx.doi.org/10.1210/edrv-16-3-271] [PMID: 7671849]
[http://dx.doi.org/10.1146/annurev.bi.63.070194.002315] [PMID: 7979245]
[http://dx.doi.org/10.1016/0092-8674(95)90199-X] [PMID: 8521507]
[http://dx.doi.org/10.1210/me.2002-0384] [PMID: 12893880]
[http://dx.doi.org/10.1615/CritRevEukarGeneExpr.v5.i2.10] [PMID: 8845584]
[http://dx.doi.org/10.1016/S1097-2765(02)00471-9] [PMID: 11931767]
[http://dx.doi.org/10.1210/edrv.23.2.0460] [PMID: 11943742]
[http://dx.doi.org/10.1016/j.bbaexp.2003.09.015] [PMID: 15020043]
[http://dx.doi.org/10.1210/me.2003-0375] [PMID: 15178743]
[http://dx.doi.org/10.1046/j.1432-1033.2002.03276.x] [PMID: 12444966]
[http://dx.doi.org/10.1074/jbc.M111975200] [PMID: 11779876]
[http://dx.doi.org/10.1210/me.2005-0348] [PMID: 16627595]
[http://dx.doi.org/10.1210/me.2008-0280] [PMID: 19762545 ]
[http://dx.doi.org/10.3390/ijms19061784] [PMID: 29914135]
[http://dx.doi.org/10.3389/fphar.2018.00492] [PMID: 29867496]
[http://dx.doi.org/10.1007/s00214-018-2381-2]
[http://dx.doi.org/10.1088/0953-8984/16/34/015]
[http://dx.doi.org/10.1002/slct.201701705]
[http://dx.doi.org/10.1073/pnas.93.11.5517] [PMID: 8643607]
[http://dx.doi.org/10.1074/jbc.M211908200] [PMID: 12714604]
[http://dx.doi.org/10.1016/j.molonc.2014.06.009] [PMID: 25091737]
[http://dx.doi.org/10.1002/1096-987X(200009)21:12<1049:AID-JCC3>3.0.CO;2-F]
[http://dx.doi.org/10.1063/1.445869]
[http://dx.doi.org/10.1063/1.448118]
[http://dx.doi.org/10.1063/1.470117]
[http://dx.doi.org/10.1063/1.464397]
[http://dx.doi.org/10.1021/ar000033j] [PMID: 11123888]
[http://dx.doi.org/10.1021/j100058a043]