The study of helix–coil transition of polyalanine with single histogram method
We have studied helix–coil transition in all-atom model of polyalanine in vacuum and distance-dependent dielectric function solvent model. Molecules of up to length 30 residues were investigated by Monte Carlo method. The single histogram method was performed to obtain thermodynamic quantities such...
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Published in | Computer physics communications Vol. 175; no. 9; pp. 604 - 611 |
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Elsevier B.V
01.11.2006
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Abstract | We have studied helix–coil transition in all-atom model of polyalanine in vacuum and distance-dependent dielectric function solvent model. Molecules of up to length 30 residues were investigated by Monte Carlo method. The single histogram method was performed to obtain thermodynamic quantities such as average energy and specific heat. We have also calculated probability distribution of energy and Binder cumulant as well as autocorrelation times for both case in order to identify the order of phase transition by using finite-size scaling arguments. Even though the probability distributions showed a single Gaussian peak, especially for this solvent model, the significant differences between the vacuum and solvent model were observed at their specific heat maximum values and Binder cumulant behaviors. While Binder cumulant has a deep valley for vacuum, it is not sensitive for the distance-dependent dielectric function solvent model. Our data are consistent with recently obtained results for polyalanine by multicanonical method. |
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AbstractList | We have studied helix–coil transition in all-atom model of polyalanine in vacuum and distance-dependent dielectric function solvent model. Molecules of up to length 30 residues were investigated by Monte Carlo method. The single histogram method was performed to obtain thermodynamic quantities such as average energy and specific heat. We have also calculated probability distribution of energy and Binder cumulant as well as autocorrelation times for both case in order to identify the order of phase transition by using finite-size scaling arguments. Even though the probability distributions showed a single Gaussian peak, especially for this solvent model, the significant differences between the vacuum and solvent model were observed at their specific heat maximum values and Binder cumulant behaviors. While Binder cumulant has a deep valley for vacuum, it is not sensitive for the distance-dependent dielectric function solvent model. Our data are consistent with recently obtained results for polyalanine by multicanonical method. |
Author | Yaşar, F. Demir, K. |
Author_xml | – sequence: 1 givenname: F. surname: Yaşar fullname: Yaşar, F. email: fatih@hacettepe.edu.tr organization: Hacettepe University, Department of Physics Engineering, Ankara, Turkey – sequence: 2 givenname: K. surname: Demir fullname: Demir, K. organization: Zonguldak Karaelmas University, Physics Department, Zonguldak, Turkey |
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Cites_doi | 10.1142/S012918310600931X 10.1002/bip.360240302 10.1016/S0378-4371(98)00059-4 10.1143/JPSJ.65.1604 10.1063/1.1699114 10.1103/PhysRevE.64.056101 10.1016/S0009-2614(97)01198-6 10.1103/PhysRevLett.61.2635 10.1063/1.1532348 10.1016/S0010-4655(01)00197-7 10.1016/S0006-3495(02)75668-3 10.1103/PhysRevE.69.026703 10.1016/S0009-2614(99)00661-2 10.1063/1.1730390 10.1021/j100589a006 10.1103/PhysRevLett.84.1836 10.1063/1.478169 10.1016/0370-2693(91)91256-U 10.1021/j150669a035 10.1103/PhysRevB.34.1841 |
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SubjectTerms | Helix–coil transition Molecular simulation Polyalanine Single histogram method Solvent model |
Title | The study of helix–coil transition of polyalanine with single histogram method |
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