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[求助]
AMBER MMPBSA 計(jì)算時(shí)建立prmtop文件問題
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急求幫忙![]() 問題一: 我用tleap建立prmtop文件時(shí),檢查電荷如下: ligand: Total unperturbed charge: 0.002000 Total perturbed charge: 0.002000 protein: Total unperturbed charge: -20.000000 Total perturbed charge: -20.000000 因此,將ligand和protein combine之后的complex電荷為: Total unperturbed charge: -19.998000 Total perturbed charge: -19.998000 這樣,我用addions給complex加Na+中和,tleap只加19個(gè)Na+,為什么? 問題二: 其他體系覺得prmtop文件建立沒有問題,但是MMPBSA計(jì)算還是出錯(cuò),過程如下: Reading command-line arguments and input files... Loading and checking parameter files for compatibility... mmpbsa_py_energy found! Using /home/user/amber12/bin/mmpbsa_py_energy cpptraj found! Using /home/user/amber12/bin/cpptraj Preparing trajectories for simulation... 51 frames were processed by cpptraj for use in calculation. Beginning PB calculations with /home/user/amber12/bin/mmpbsa_py_energy calculating complex contribution... CalcError: /home/user/amber12/bin/mmpbsa_py_energy failed with prmtop complex.prmtop! Exiting. All files have been retained. 這是什么原因呢?還是prmtop文件建立的不對(duì)? |
鐵桿木蟲 (正式寫手)
金蟲 (小有名氣)
木蟲 (正式寫手)

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金蟲 (小有名氣)

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