Re: [gmx-users] Protein at given pH

2012-12-01 Thread Alexey Shvetsov
Justin Lemkul писал 07-11-2012 16:20: On 11/7/12 7:10 AM, Steven Neumann wrote: On Wed, Nov 7, 2012 at 11:56 AM, Justin Lemkul jalem...@vt.edu wrote: On 11/7/12 4:19 AM, Steven Neumann wrote: Dear Gmx Users, I am trying to simulate protein-ligand interactions at specific pH=5. I

Re: [gmx-users] Protein at given pH

2012-11-08 Thread Tsjerk Wassenaar
Hi, Do you mean the pKa value of the side chain in solution? Or the pKa value in ethanol, DMSO, hexane? Maybe the pKa value in a membrane, or in the interior of a protein, perhaps in a hydrophobic pocket? Or the pKa with one/two/three neighbouring acidic/basic residues? If you have literature

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Justin Lemkul
On 11/7/12 4:19 AM, Steven Neumann wrote: Dear Gmx Users, I am trying to simulate protein-ligand interactions at specific pH=5. I processed my protein.pdb into the H++. As I see from th titration curve of the entire molecule it appears that at pH=5 the total charge should be equal to 2. When

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Steven Neumann
On Wed, Nov 7, 2012 at 11:56 AM, Justin Lemkul jalem...@vt.edu wrote: On 11/7/12 4:19 AM, Steven Neumann wrote: Dear Gmx Users, I am trying to simulate protein-ligand interactions at specific pH=5. I processed my protein.pdb into the H++. As I see from th titration curve of the entire

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Justin Lemkul
On 11/7/12 7:10 AM, Steven Neumann wrote: On Wed, Nov 7, 2012 at 11:56 AM, Justin Lemkul jalem...@vt.edu wrote: On 11/7/12 4:19 AM, Steven Neumann wrote: Dear Gmx Users, I am trying to simulate protein-ligand interactions at specific pH=5. I processed my protein.pdb into the H++. As I

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Steven Neumann
On Wed, Nov 7, 2012 at 12:20 PM, Justin Lemkul jalem...@vt.edu wrote: On 11/7/12 7:10 AM, Steven Neumann wrote: On Wed, Nov 7, 2012 at 11:56 AM, Justin Lemkul jalem...@vt.edu wrote: On 11/7/12 4:19 AM, Steven Neumann wrote: Dear Gmx Users, I am trying to simulate protein-ligand

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Erik Marklund
Hi, I've used the H++ server myself at times. My experience is that it's rather sensitive to the very fine detail of the input structure in some cases. I've had situations where H++ suggest one protonation state, then a short md simulation takes the system to a slightly different conformation

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Steven Neumann
On Wed, Nov 7, 2012 at 2:55 PM, Erik Marklund er...@xray.bmc.uu.se wrote: Hi, I've used the H++ server myself at times. My experience is that it's rather sensitive to the very fine detail of the input structure in some cases. I've had situations where H++ suggest one protonation state, then

Re: [gmx-users] Protein at given pH

2012-11-07 Thread Erik Marklund
7 nov 2012 kl. 16.21 skrev Steven Neumann: On Wed, Nov 7, 2012 at 2:55 PM, Erik Marklund er...@xray.bmc.uu.se wrote: Hi, I've used the H++ server myself at times. My experience is that it's rather sensitive to the very fine detail of the input structure in some cases. I've had