03211nas a2200217   4500008004100000022001400041245010100055210006900156260007100225300001400296490000700310520238000317100002602697700002502723700002802748700002002776700002502796700002002821700002602841856012602867       2015                        eng d  a1549-961800aHigh-throughput simulations of dimer and trimer assembly of membrane proteins. the DAFT approach0 aHighthroughput simulations of dimer and trimer assembly of membr  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a2278-22910 v113 a<p>Interactions between membrane proteins are of great biological significance and are consequently an important target for pharmacological intervention. Unfortunately, it is still difficult to obtain detailed views on such interactions, both experimentally, where the environment hampers atomic resolution investigation, and computationally, where the time and length scales are problematic. Coarse grain simulations have alleviated the later issue, but the slow movement through the bilayer, coupled to the long life times of nonoptimal dimers, still stands in the way of characterizing binding distributions. In this work, we present DAFT, a Docking Assay For Transmembrane components, developed to identify preferred binding orientations. The method builds on a program developed recently for generating custom membranes, called insane (INSert membrANE). The key feature of DAFT is the setup of starting structures, for which optimal periodic boundary conditions are devised. The purpose of DAFT is to perform a large number of simulations with different components, starting from unbiased noninteracting initial states, such that the simulations evolve collectively, in a manner reflecting the underlying energy landscape of interaction. The implementation and characteristic features of DAFT are explained, and the efficacy and relaxation properties of the method are explored for oligomerization of glycophorin A dimers, polyleucine dimers and trimers, MS1 trimers, and rhodopsin dimers. The results suggest that, for simple helices, such as GpA and polyleucine, in POPC/DOPC membranes series of 500 simulations of 500 ns each allow characterization of the helix dimer orientations and allow comparing associating and nonassociating components. However, the results also demonstrate that short simulations may suffer significantly from nonconvergence of the ensemble and that using too few simulations may obscure or distort features of the interaction distribution. For trimers, simulation times exceeding several microseconds appear needed, due to the increased complexity. Similarly, characterization of larger proteins, such as rhodopsin, takes longer time scales due to the slower diffusion and the increased complexity of binding interfaces. DAFT and its auxiliary programs have been made available from http://cgmartini.nl/, together with a working example.</p>1 aWassenaar, Tsjerk, A.1 aPluhackova, Kristyna1 aMoussatova, Anastassiia1 aSengupta, Durba1 aMarrink, Siewert-Jan1 aTieleman, Peter1 aBoeckmann, Rainer, A.  uhttp://library.ncl.res.in/content/high-throughput-simulations-dimer-and-trimer-assembly-membrane-proteins-daft-approach-000833nas a2200205   4500008004100000022001400041245010800055210006900163260008000232300001400312490000800326100002600334700002500360700002800385700002000413700002500433700002000458700002600478856012300504       2015                        eng d  a0006-349500aLandscapes of membrane protein interactions from high-throughput MD simulations using the daft approach0 aLandscapes of membrane protein interactions from highthroughput   a600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USAbBiophys SoccJAN  a526A-526A0 v1081 aWassenaar, Tsjerk, A.1 aPluhackova, Kristyna1 aMoussatova, Anastassiia1 aSengupta, Durba1 aMarrink, Siewert-Jan1 aTieleman, Peter1 aBoeckmann, Rainer, A.  uhttp://library.ncl.res.in/content/landscapes-membrane-protein-interactions-high-throughput-md-simulations-using-daft-0