Re: [gmx-users] what means of contact in mindist?

2016-02-01 Thread
Hello, I'm very intreresting in this question, so can I join in ? First, I wonder if there is "interactions" between hydrophbic residues. what I know is that for those nonpolar residues, their interactions with water is weaker than the polar attractions between two water molecules, so that

Re: [gmx-users] what means of contact in mindist?

2016-02-01 Thread
I'm sorry I need to correct the first point in my last e-mail. I mean I wonder if it is the "hydrophobic interaction" that make those hydrophobic residues together. Maybe what really gather those hydrophbic ones is Wan der Vaals force plus the "squeezing out" force from water. At

Re: [gmx-users] Translating .frcmod and .prep to .itp

2015-07-02 Thread
I wish I could offer some help. br/I used to prepare small compound molecules, and the ligand.frcmod was generated by parmchk of AMBER. The ligand.frcmod was then handed to tleap or xleap of AMBER, to generate ligand.prmtop and ligand.inpcrd. Following that, a python script called acpype.py

Re: [gmx-users] Why h_bond can not form

2015-05-15 Thread
changing to a more matchable forcefield. Thanks to Justin! You help me a lot! 在 2015-05-11 19:46:27,Justin Lemkul jalem...@vt.edu 写道: On 5/10/15 8:48 PM, 范聪 wrote: Hello everyone! I offered a picture called ask.png to illistrate my question. According to the referense papers, the H

Re: [gmx-users] Why h_bond can not form

2015-05-11 Thread
It's so kind of you to answer my question in such a short time. I'll try other forcefields. Thank you very much! 在 2015-05-11 19:46:27,Justin Lemkul jalem...@vt.edu 写道: On 5/10/15 8:48 PM, 范聪 wrote: Hello everyone! I offered a picture called ask.png to illistrate my question. According

Re: [gmx-users] HYL force field

2015-05-10 Thread
Hello, can you treat HYL as ligand and build its forcefield parameters referring to this link http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin/gmx-tutorials/complex/index.html At 2015-05-11 08:39:39, Ming Tang m21.t...@qut.edu.au wrote: Dear all, I want to simulate a protein containing

Re: [gmx-users] modelling/adding missing residues in case of Fatal error: Incomplete ring in HIS3

2015-05-09 Thread
Hello, as to this situation, what I often do is to open the pdb file with editing software such as schrodinger or SYBYL, then mutate the incomplete residue to a complete one. Also, in these software, there will be a protein preparation wizard to help you check and repair the protein structure.