title: Molecular basis of peptide recognition by the TCR: affinity differences calculated using large scale computing.
abstract: Free energy calculations of the wild-type and the variant human T cell lymphotropic virus type 1 Tax peptide presented by the MHC to the TCR have been performed using large scale massively parallel molecular dynamics simulations. The computed free energy difference (-1.86 +/- 0.44 kcal/mol) using alchemical mutation-based thermodynamic integration agrees well with experimental data (-2.9 +/- 0.2 kcal/mol). Our simulations exploit state-of-the-art hardware and codes whose algorithms have been optimized for supercomputing platforms. This enables us to simulate larger, more realistic biological systems for longer durations without the imposition of artificial constraints.
authors: Centre for Computational Science, Department of Chemistry, University College London, United Kingdom.
authors: Shunzhou
authors: S
authors: Wan
authors: Peter V
authors: PV
authors: Coveney
authors: Darren R
authors: DR
authors: Flower
mesh_terms: D001665:Binding Sites / Q000276:immunology; D019295:Computational Biology / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data; D003198:Computer Simulation; D018360:Crystallography, X-Ray / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data; D015234:HLA-A Antigens / Q000737:chemistry* / Q000378:metabolism*; D015789:HLA-A2 Antigen; D018448:Models, Immunological; D036103:Nanotechnology / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data; D010446:Peptide Fragments / Q000737:chemistry* / Q000276:immunology* / Q000378:metabolism; D011485:Protein Binding / Q000276:immunology; D011487:Protein Conformation; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000737:chemistry* / Q000378:metabolism*; D012015:Reference Standards; D012984:Software; D013816:Thermodynamics
chemical_list: D015234:HLA-A Antigens; C435939:HLA-A*02:01 antigen; D015789:HLA-A2 Antigen; D010446:Peptide Fragments; D016693:Receptors, Antigen, T-Cell, alpha-beta