[gmx-users] Ligand simulation

2013-11-07 Thread Kavyashree M
Dear users, Although this topic has been extensively discussed in the list previously, I am unclear about the solution for the problem.. While running ligand in water simulation (EM) with RF-0 I get the following message: --

Re: [gmx-users] g_lie and ligand only simulation

2013-11-06 Thread Kavyashree M
Thank you.. On Wed, Nov 6, 2013 at 7:39 PM, Justin Lemkul wrote: > > > On 11/6/13 5:47 AM, Kavyashree M wrote: > >> Dear users, >> >> Sorry for repeating the same question. I just wanted to know >> whether is it ok if I have rlist > rcoulomb in liga

Re: [gmx-users] g_lie and ligand only simulation

2013-11-06 Thread Kavyashree M
at 11:52 AM, Kavyashree M wrote: > Dear users, > > When the simulation was carried out with PME > rcoulomb was set equal to rlist. But when I need to > to ligand-water simulation without PME (with RF-0) > then it requires rlist greater by 0.1-0.3 than rcoulomb. > So if I re

Re: [gmx-users] g_lie and ligand only simulation

2013-11-05 Thread Kavyashree M
the energies isnt it? Thank you Regards Kavya On Sat, Nov 2, 2013 at 9:51 PM, Kavyashree M wrote: > Ok thank you. I thought it was for protein-ligand-water > that needs to be rerun without PME. > > Thanks > Regards > Kavya > > > > On Sat, Nov 2, 2013 at

Re: [gmx-users] g_lie and ligand only simulation

2013-11-02 Thread Kavyashree M
Ok thank you. I thought it was for protein-ligand-water that needs to be rerun without PME. Thanks Regards Kavya On Sat, Nov 2, 2013 at 9:45 PM, Justin Lemkul wrote: > > > On 11/2/13 12:14 PM, Kavyashree M wrote: > >> Sir, >> >> Thank you. Should the ligan

Re: [gmx-users] g_lie and ligand only simulation

2013-11-02 Thread Kavyashree M
Sir, Thank you. Should the ligand-water MD be done without PME? Thank you Regards Kavya On Sat, Nov 2, 2013 at 9:13 PM, Justin Lemkul wrote: > > > On 11/2/13 1:22 AM, Kavyashree M wrote: > >> Dear Users, >> >> Its mentioned in the list that it would be >>

[gmx-users] g_lie and ligand only simulation

2013-11-01 Thread Kavyashree M
Dear Users, Its mentioned in the list that it would be wrong to use g_lie on a simulation which uses PME. So kindly suggest any other way available to get the free energy of ligand binding other using g_lie? Thank you Regards kavya -- gmx-users mailing listgmx-users@gromacs.org http://lists

[gmx-users] g_lie and ligand only simulation

2013-11-01 Thread Kavyashree M
Dear Gromacs users, I have a protein-ligand in water simulation (Gmx 4.5.3), for calculating free energy of ligand binding, a separate simulation of ligand in water simulation is required (which I read from the list). The question is the protein-ligand is simulated as a dimeric system so is it nec

Re: [gmx-users] Writing periodic image coordinates.

2013-09-26 Thread Kavyashree M
Thank you Sir! Regards Kavya On Fri, Sep 27, 2013 at 12:52 AM, Tsjerk Wassenaar wrote: > Hi Kavya, > > genconf -nbox 3 3 3 > > Cheers, > > Tsjerk > > > On Thu, Sep 26, 2013 at 6:24 PM, Kavyashree M wrote: > > > Dear users, > > > > For some a

[gmx-users] Writing periodic image coordinates.

2013-09-26 Thread Kavyashree M
Dear users, For some analysis I require the 27 periodic images of the system I ran the simulation for. Kindly let me know how can it be written to a pdb file. Thanking you Regards Kavya -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Pleas

Re: [gmx-users] The sum of the two largest charge group radii ..is larger than rlist

2013-08-06 Thread Kavyashree M
Ok Thank you. Regards Kavya On Tue, Aug 6, 2013 at 3:02 PM, Justin Lemkul wrote: > > > On 8/6/13 2:35 AM, Kavyashree M wrote: > >> Dear users, >> >> >> After EM step while running NVT I gor a warning saying - >> >> Largest charge group rad

[gmx-users] The sum of the two largest charge group radii ..is larger than rlist

2013-08-05 Thread Kavyashree M
Dear users, After EM step while running NVT I gor a warning saying - Largest charge group radii for Van der Waals: 3.798, 1.293 nm Largest charge group radii for Coulomb: 7.565, 3.798 nm The sum of the two largest charge group radii (11.362685) is larger than rlist (1.40) But this e

Re: [gmx-users] concatenating 2 xtc files

2013-08-02 Thread Kavyashree M
Sir, But if something went wrong, then "over" is rather irrelevant, isn't it? Yes. I am planning to rerun ifI dont get any solution. > So your simulation started from some previous point and re-ran? I don't > see how this would be possible given what you have been posting. The overlap was

Re: [gmx-users] concatenating 2 xtc files

2013-08-01 Thread Kavyashree M
, Aug 1, 2013 at 5:18 PM, Justin Lemkul wrote: > > > On 8/1/13 3:42 AM, Kavyashree M wrote: > >> Dear Sir, >> >> First trajectory - traj1.xtc (0 to 5... ns) >> Second trajectory - traj2.xtc (5... to 25ns) >> >> But there is no gap in between. >&

Re: [gmx-users] concatenating 2 xtc files

2013-08-01 Thread Kavyashree M
jerk > > > On Thu, Aug 1, 2013 at 8:12 AM, Kavyashree M wrote: > > > Dear users, > > > > I ran a simulation for 25ns. First 5ns in 8 core machine > > and late part in 64 cores. It ran without any problem. The > > trajectories were concatenated, jumps are rem

[gmx-users] concatenating 2 xtc files

2013-07-31 Thread Kavyashree M
Dear users, I ran a simulation for 25ns. First 5ns in 8 core machine and late part in 64 cores. It ran without any problem. The trajectories were concatenated, jumps are removed and rmsd was calculated. But there was sudden jump in the rmsd curve. Is it wrong to run simulations in different cores

[gmx-users] creating a checkpoint file

2013-07-25 Thread Kavyashree M
Dear users, For some unknown reasons checkpoint file are not being created if -cpo is not mentioned (in 4.5.3). Now I have a trajectory of ~10ns without a checkpoint file. I tried the following - tpbconv option to create a new .tpr file so that I can start form the point I stopped. But manual ment

[gmx-users] Initial cell size is smaller than the cell size limit..

2013-07-21 Thread Kavyashree M
Dear users, While running a ligand bound MD using AMber03 force field. I got the following error after ~ 4.9 ns The initial cell size (1.247705) is smaller than the cell size limit (1.586683), change options -dd, -rdd or -rcon, see the log file for details Initially I ran using 64 nodes (till 3.3

Re: [gmx-users] Salt bridge observation

2013-04-04 Thread Kavyashree M
Ok. Still the distance is beyond the mentioned cut-off. The distance of both OD1 and OD2 of ASP is more than 4 Ang from NH2 of Arg. Thank you Regards Kavya On Thu, Apr 4, 2013 at 2:25 PM, Justin Lemkul wrote: > > > On 4/4/13 4:34 AM, Kavyashree M wrote: > >> Sir, >> &

Re: [gmx-users] Salt bridge observation

2013-04-04 Thread Kavyashree M
Sir, Why I mentioned NH2 CG saltbridge because the g_saltbr gives the charge group and does not mention the OD2 of ASP but mentions only CG. Otherwise it does not make any sense. Thanks Regards Kavya On Thu, Apr 4, 2013 at 1:53 PM, Justin Lemkul wrote: > > > On 4/4/13 12:27 AM, Kav

Re: [gmx-users] Salt bridge observation

2013-04-03 Thread Kavyashree M
, Apr 3, 2013 at 10:25 PM, Justin Lemkul wrote: > On Wed, Apr 3, 2013 at 12:50 PM, Kavyashree M wrote: > > > Dear users, > > > > This is regarding an observation while calculating the > > salt bridge (sb) using g_saltbr. > > > > > > I used g_saltbr and

[gmx-users] Salt bridge observation

2013-04-03 Thread Kavyashree M
Dear users, This is regarding an observation while calculating the salt bridge (sb) using g_saltbr. I used g_saltbr and g_hbond (with contact option) with a cut of of 4Ang, for calculating sb in the whole protein at a single frame. I made sure that I considered sb between same set of residues (

Re: [gmx-users] Re: Salt bridge Calculations

2013-04-02 Thread Kavyashree M
interesting. If I had a given set of known SB then I would have definitely gone for g_dist. Thank you very much. Kavya On Tue, Apr 2, 2013 at 10:45 PM, Justin Lemkul wrote: > On Tue, Apr 2, 2013 at 1:09 PM, Kavyashree M wrote: > > > Sir, > > > > This g_hbond will gene

Re: [gmx-users] Re: Salt bridge Calculations

2013-04-02 Thread Kavyashree M
calculate salt bridges between these two indices - group 1: ASP_GLU_&_OD1_OD2_OE1_OE2 group 2: ARG_LYS_&_NZ_NE_NH1_NH2 Thank you Kavya On Tue, Apr 2, 2013 at 10:10 PM, Justin Lemkul wrote: > > > On 4/2/13 11:58 AM, Kavyashree M wrote: > >> Sir, >> >> Thank

Re: [gmx-users] Re: Salt bridge Calculations

2013-04-02 Thread Kavyashree M
ate distances, > if you already have the information about atoms involved in salt > bridge interactions. > > On Tue, Apr 2, 2013 at 5:10 PM, Kavyashree M wrote: > > Dear users, > > > > Kindly clarify my doubt regarding salt bridge calculation. > > > > Thank

[gmx-users] Re: Salt bridge Calculations

2013-04-02 Thread Kavyashree M
Dear users, Kindly clarify my doubt regarding salt bridge calculation. Thank you Regards Kavya On Mon, Apr 1, 2013 at 3:48 PM, Kavyashree M wrote: > Dear users, > > For calculating salt bridge in proteins I > am using g_hbond instead of g_saltbr. > > In g_hbond I use conta

[gmx-users] Salt bridge Calculations

2013-04-01 Thread Kavyashree M
Dear users, For calculating salt bridge in proteins I am using g_hbond instead of g_saltbr. In g_hbond I use contact and mention two indices consisting of group 1: ASP_GLU_&_OD1_OD2_OE1_OE2: group 2: ARG_LYS_&_NZ_NE_NH1_NH2: I use the command: g_hbond_46 -f traj.xtc -s md.tpr -n index.ndx -conta

Re: [gmx-users] Free energy landscape by g_sham

2013-03-31 Thread Kavyashree M
imum of the probability > density function. Kb is the Boltzmann constant, and T is the > temperature corresponding to each simulation. > > > On Sun, Mar 31, 2013 at 10:35 AM, Kavyashree M wrote: > > Dear users, > > > > > > Can someone kindly explain how g_sh

[gmx-users] Free energy landscape by g_sham

2013-03-30 Thread Kavyashree M
Dear users, Can someone kindly explain how g_sham calculates the free energy landscape of given two quantities say, rmsd and radius of gyration. Any references are welcome. Thank you with Regards Kavya -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/

[gmx-users] Hydrophobic contact cut-off

2013-03-26 Thread Kavyashree M
Dear users, Sorry for an off-topic question.. What is the distance cut-off considered for hydrophobic contact in protein? Some paper states 4-8Ang, while some other considers only till 5Ang. It is reported that this is a long range interaction. Any information clarifying this doubt will be very

Re: [gmx-users] Hydrogen bonding differences

2013-03-22 Thread Kavyashree M
ame time. With -merge this counts as one if you analyze the > entire protein. If you split your analysis such hbonds will show up in both > e.g. SS and MS, hence TOT < MM+SS+MS. It's just another way of counting > hbonds. > > Erik > > > On Mar 22, 2013, at 5:32 P

Re: [gmx-users] Hydrogen bonding differences

2013-03-22 Thread Kavyashree M
On Mar 22, 2013, at 4:46 PM, Kavyashree M wrote: > > Dear Users, >> >> As suggested earlier by Erik I used 4.6 to calculate the hydrogen bonds. >> Still the >> Total intra-protein hydrogen bonds is not equal (MM +MS +SS) hydrogen >> bond. >> Is there any othe

Re: [gmx-users] Hydrogen bonding differences

2013-03-22 Thread Kavyashree M
Dear Users, As suggested earlier by Erik I used 4.6 to calculate the hydrogen bonds. Still the Total intra-protein hydrogen bonds is not equal (MM +MS +SS) hydrogen bond. Is there any other solution? Thank you Kavya On Fri, Jan 25, 2013 at 4:11 PM, Kavyashree M wrote: > Dear Sir, > &g

[gmx-users] query regarding mk_angndx

2013-03-09 Thread Kavyashree M
-- Forwarded message -- From: Kavyashree M Date: Fri, Mar 8, 2013 at 10:45 PM Subject: query regarding mk_angndx To: Discussion list for GROMACS users Dear users, I used mkang_ndx to create an index file with dihedral angles. Input was: mk_angndx -s a.tpr -n angle.ndx

[gmx-users] query regarding mk_angndx

2013-03-08 Thread Kavyashree M
Dear users, I used mkang_ndx to create an index file with dihedral angles. Input was: mk_angndx -s a.tpr -n angle.ndx -type dihedral output angle.ndx read like this - [ Phi=180.0_2_43.93 ] 52018192237353627323031 39595758

Re: [gmx-users] g_hbond and contact

2013-03-05 Thread Kavyashree M
Thank you Sir. On Tue, Mar 5, 2013 at 4:33 PM, Erik Marklund wrote: > > On Mar 5, 2013, at 10:34 AM, Kavyashree M wrote: > > Sir, >> >> I used gromacs 4.6. I got the point - index file will tell how many >> contacts an >> atom has made during the trajectory

Re: [gmx-users] g_hbond and contact

2013-03-05 Thread Kavyashree M
Sir, I used gromacs 4.6. I got the point - index file will tell how many contacts an atom has made during the trajectory. Whether it has made a contact with an atom only in once or all the time, in the whole trajectory, it will be mentioned. Am I right? So from the problem I had, can I say that n

Re: [gmx-users] g_hbond and contact

2013-03-04 Thread Kavyashree M
o conclude from this observations. -> I used the same cutoff throughout. -> There has not been any swapping of the trajectory while analysing. Thank you Kavya On Tue, Mar 5, 2013 at 1:09 AM, Justin Lemkul wrote: > > > On 3/4/13 1:10 PM, Kavyashree M wrote: > >>

Re: [gmx-users] g_hbond and contact

2013-03-04 Thread Kavyashree M
On Mon, Mar 4, 2013 at 11:10 PM, Justin Lemkul wrote: > > When measuring contacts, you don't measure one group, you measure the > number of contacts that occur between groups A and B, which considers all > atoms in those two groups. > I gave a group of hydrophobic atoms in both cases The command

Re: [gmx-users] g_hbond and contact

2013-03-04 Thread Kavyashree M
ion has more contacts than the second one.. I hope I am clear this time. Thank you kavya On Mon, Mar 4, 2013 at 10:05 PM, Justin Lemkul wrote: > > > On 3/4/13 11:25 AM, Kavyashree M wrote: > >> Dear users, >> >> I used the following tool for finding the contacts >

[gmx-users] g_hbond and contact

2013-03-04 Thread Kavyashree M
Dear users, I used the following tool for finding the contacts g_hbond_46 -f a.xtc -s a.tpr -contact -n a.ndx -r 0.4 -hbm a.xpm -hbn a.ndx -num a.xvg >From the index file, the number of contacts of each atom was extracted. This and the xvg output was compared with another simulation. It was found

[gmx-users] order in index and matrix

2013-02-21 Thread Kavyashree M
Dear users, I just wanted a small clarification whether the order of elements in matrix (-hbm) corresponds to reverse order of elements in the index file (-hbn) obtained from g_hbond? Thank you Kavya -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx

Re: [gmx-users] Number of interactions per residue

2013-02-19 Thread Kavyashree M
a contact over the entire simulation? Kindly help.. Thank you Kavya On Tue, Feb 19, 2013 at 9:56 AM, Kavyashree M wrote: > Sir, > > My purpose was to compare two simulations of the > same protein at different temperatures. So I wanted > to see how the interaction of each resi

Re: [gmx-users] Number of interactions per residue

2013-02-18 Thread Kavyashree M
On Tue, Feb 19, 2013 at 9:50 AM, Kavyashree M wrote: > Hello Sir, > > I used C-alpha atoms. > > Kavya > > > On Mon, Feb 18, 2013 at 11:28 PM, Erik Marklund wrote: > >> Hi, >> >> With -r2 one can provide a second, larger, cutoff so that contact >>

Re: [gmx-users] Number of interactions per residue

2013-02-18 Thread Kavyashree M
What index groups did you use? > > Erik > > > On Feb 18, 2013, at 6:04 PM, Kavyashree M wrote: > > Dear users, >> >> As Suggested by Erik, I used g_hbond with -contact to obtain a matrix of >> each contact as a function of time. I used the following command -

Re: [gmx-users] Number of interactions per residue

2013-02-18 Thread Kavyashree M
dimer of 474 residues (237 each). With a distance cut off of 0.5nm there should have been more number of contacts. And what is the difference in using -r only or -r2 only and combining -r and -r2? Thank you Kavya On Thu, Feb 14, 2013 at 3:40 PM, Kavyashree M wrote: > Thank you! > > >

Re: [gmx-users] Number of interactions per residue

2013-02-14 Thread Kavyashree M
Thank you! On Thu, Feb 14, 2013 at 3:38 PM, Erik Marklund wrote: > Perhaps g_hbond -contact will do what you want. > > Erik > > > On Feb 14, 2013, at 10:42 AM, Kavyashree M wrote: > > Dear users, >> >> How can I get the number of interactions of each resid

[gmx-users] Number of interactions per residue

2013-02-14 Thread Kavyashree M
Dear users, How can I get the number of interactions of each residue within a cut off as a function of time. just like g_saltbr writes with the option -sep. I tried using g_mdmat but it gives an average contact map. Thank you Kavya -- gmx-users mailing listgmx-users@gromacs.org http://lists.

Re: [gmx-users] Re: Regarding mean square displacement

2013-02-07 Thread Kavyashree M
Lemkul wrote: > > > On 2/7/13 7:08 AM, Kavyashree M wrote: > >> Dear Sir, >> >> Yes it is the same protein. Initially I had not superposed the >> structures in the trajectory. But this time I calculated the msd >> on a superposed trajectory (of the same sim

Re: [gmx-users] Re: Salt-bridge segmentation fault

2013-02-07 Thread Kavyashree M
On Thu, Feb 7, 2013 at 5:31 PM, Justin Lemkul wrote: > > > On 2/7/13 6:42 AM, Kavyashree M wrote: > >> Dear users, >> >> After simulation dimers appear separated, I was >> able to do saltbridge calculation on this. This will >> be different than doing

Re: [gmx-users] Re: Regarding mean square displacement

2013-02-07 Thread Kavyashree M
. If any other information is required Please let me know. Thank you Kavya On Thu, Feb 7, 2013 at 5:28 PM, Justin Lemkul wrote: > > > On 2/7/13 6:49 AM, Kavyashree M wrote: > >> Dear Sir, >> >> Thank you for the reply, >> >> It does not cross the boun

Re: [gmx-users] Re: Regarding mean square displacement

2013-02-07 Thread Kavyashree M
acceptable? Thank you Kavya On Thu, Feb 7, 2013 at 4:54 PM, Justin Lemkul wrote: > > > On 2/6/13 11:49 PM, Kavyashree M wrote: > >> Dear users, >> >> Since I am getting the mean square displacements in terms of >> several nm^2. I doubt it is wrong. Could anyo

[gmx-users] Re: Salt-bridge segmentation fault

2013-02-07 Thread Kavyashree M
Dear users, After simulation dimers appear separated, I was able to do saltbridge calculation on this. This will be different than doing it on a dimer which are together. Am I correct? Please reply.. Thank you Kavya On Thu, Feb 7, 2013 at 3:39 PM, Kavyashree M wrote: > Dear users, > &

Re: [gmx-users] Superimposed trajectory

2013-02-06 Thread Kavyashree M
Thank you Sir! Kavya On Thu, Feb 7, 2013 at 11:18 AM, Tsjerk Wassenaar wrote: > trjconv -fit rot+trans > > Cheers, > > Tsjerk > > On Thu, Feb 7, 2013 at 6:19 AM, Kavyashree M wrote: > > > Dear users, > > > > Which tool can be used to create a tra

[gmx-users] Re: Regarding mean square displacement

2013-02-06 Thread Kavyashree M
Kavya On Wed, Feb 6, 2013 at 3:35 PM, Kavyashree M wrote: > Dear users, > > I have a very basic question in MSD calculation. > g_msd calculation on a protein dimer (~237 aa each) > trajectory gave a plot of msd, with the values ranging > between 1 to 14nm^2. > But is this a

[gmx-users] Regarding mean square displacement

2013-02-06 Thread Kavyashree M
Dear users, I have a very basic question in MSD calculation. g_msd calculation on a protein dimer (~237 aa each) trajectory gave a plot of msd, with the values ranging between 1 to 14nm^2. But is this a sensible MSD? As the values given in a paper i was referring was in Ang^2 J. Chem. Theory Comp

[gmx-users] Re: clarification regarding contact map - g_mdmat

2013-02-01 Thread Kavyashree M
Dear users, Sorry. It is because the unit of the cutoff distance ]is in nm. Thank you kavya On Fri, Feb 1, 2013 at 1:28 PM, Kavyashree M wrote: > Dear users, > I used g_mdmap to calculate the C-alpha contact map of > the trajectory. the distance cut off of 8.0 Ang was selected >

[gmx-users] clarification regarding contact map - g_mdmat

2013-01-31 Thread Kavyashree M
Dear users, I used g_mdmap to calculate the C-alpha contact map of the trajectory. the distance cut off of 8.0 Ang was selected The protein is a dimer of 237 residues. The output of -no was like this - #resratio tot mean natm mean/atm 1 1.000 473 473.0001 473.000 2

Re: [gmx-users] Hydrogen bonding differences

2013-01-25 Thread Kavyashree M
y form before. > > Erik > > > On Jan 24, 2013, at 3:59 PM, Kavyashree M wrote: > > Dear Sir, >> >> This is 4.5.3. I have not tried nomerge. I did not use >> nomerge option in any of them, So if it has counted >> it (Hbond b/w same donor and acceptor but w

[gmx-users] Distance matrix of the trajectory

2013-01-25 Thread Kavyashree M
Dear users, While calculating the distance matrix using g_mdmat, with -no option, it gives an xvg output pertaining the total, mean etc contacts of the residue within 1.5Ang in the trajectory. I calculated the same for a single frame (or pdb file) #resratio tot mean natm mean/atm 1

Re: [gmx-users] g_hbond existence matrix

2013-01-24 Thread Kavyashree M
Thank you for the clarification. On Fri, Jan 25, 2013 at 12:40 AM, Justin Lemkul wrote: > > > On 1/24/13 11:03 AM, Kavyashree M wrote: > >> Dear users, >> >> I have a little confusion - >> The hbmap.xpm file gives the existence of each hydrogen bond. >

[gmx-users] g_hbond existence matrix

2013-01-24 Thread Kavyashree M
Dear users, I have a little confusion - The hbmap.xpm file gives the existence of each hydrogen bond. The file mentions - " c #FF " /* "None" */, "o c #FF " /* "Present" */, Meaning - character "" in white colour means Hbond not present character "o" in red colour means Hbond is present

Re: [gmx-users] Hydrogen bonding differences

2013-01-24 Thread Kavyashree M
same? The difference is 4-5 Hbonds.. Thank you Kavya On Thu, Jan 24, 2013 at 7:30 PM, Erik Marklund wrote: > Hi. What version was this? Have you tried with -nomerge? > > Erik > > > On Jan 21, 2013, at 10:55 AM, Kavyashree M wrote: > > Dear users, >> >> Wh

Re: [gmx-users] Re: g_saltbr not include side chains of GLU and ASP??

2013-01-03 Thread Kavyashree M
Sir, I used OPLS-AA ff. Thank you very mush for your effort. Its clear now. AS you said It assigns the number of the 1st atom of the charge group in the output file. Thank you kavya On Thu, Jan 3, 2013 at 5:01 PM, Justin Lemkul wrote: > > > On 1/3/13 5:15 AM, Kavyashree M wrote:

[gmx-users] Re: g_saltbr not include side chains of GLU and ASP??

2013-01-03 Thread Kavyashree M
Dear users, I would like to add that in case of ARG or LYS, the sidechain nitrogen atoms (NE,NZ,NH1,NH2) are present in the output. The problem s only with GLU and ASP residues. I use 4.5.3 version Thank you kavya On Thu, Jan 3, 2013 at 3:28 PM, Kavyashree M wrote: > Dear users, > &g

[gmx-users] g_saltbr not include side chains of GLU and ASP??

2013-01-03 Thread Kavyashree M
Dear users, I used g_saltbr to calculate the salt-bridge interactions using: g_saltbr -f ../traj.xtc -s ../topol.tpr -t 0.4 -sep It gave the output for each atom-atom interaction within the given cut-off. When I checked the atom type that corresponds to the atom number output in each file, side ch

Re: [gmx-users] g_dih calculation doubt

2012-12-26 Thread Kavyashree M
; As far as I can see, its functionality is entirely duplicated by g_angle, > so g_dih will probably be removed in 4.6. I suggest you use g_angle for > whatever you are trying to do. > > Mark > > On Wed, Dec 26, 2012 at 4:31 PM, Justin Lemkul wrote: > > > > > > &

Re: [gmx-users] g_hbond index

2012-12-19 Thread Kavyashree M
Ok thank you. kavya On Wed, Dec 19, 2012 at 10:52 PM, Justin Lemkul wrote: > > > On 12/19/12 11:43 AM, Kavyashree M wrote: > >> Sir, >> >> I thought that the order should not matter but when I used 18 - 1 >> and 1 - 18 the graph were slightly off. >>

Re: [gmx-users] g_hbond index

2012-12-19 Thread Kavyashree M
group 1. Thank you Kavya On Wed, Dec 19, 2012 at 10:06 PM, Justin Lemkul wrote: > > > On 12/19/12 9:37 AM, Kavyashree M wrote: > >> Dear users, >> >> While using g_hbond, does it make any difference if I give option >> 18 and 1 or 1 and 18? >> > > Or

Re: [gmx-users] g_sas : Total surface area

2012-12-12 Thread Kavyashree M
I meant subset :) On Wed, Dec 12, 2012 at 8:21 PM, Kavyashree M wrote: > Sir, > > Oh! I was using sunset index numbers for both. I am sorry. I will try > that and see. First option as protein and next the subset. Thank you > very much. > > Kavya > > > > On Wed

Re: [gmx-users] g_sas : Total surface area

2012-12-12 Thread Kavyashree M
Sir, Oh! I was using sunset index numbers for both. I am sorry. I will try that and see. First option as protein and next the subset. Thank you very much. Kavya On Wed, Dec 12, 2012 at 8:16 PM, Justin Lemkul wrote: > > > On 12/12/12 9:37 AM, Kavyashree M wrote: > >> Thank

Re: [gmx-users] g_sas : Total surface area

2012-12-12 Thread Kavyashree M
ber? > > Francesco > > > 2012/12/12 Mark Abraham > > > On Wed, Dec 12, 2012 at 9:06 AM, Kavyashree M wrote: > > > > > Dear users, > > > > > > I was calculating solvent accessible surface area for a trajectory > > > using g_sas. I use

[gmx-users] Re: g_sas : Total surface area

2012-12-12 Thread Kavyashree M
Dear users, Anything wrong in my question? Kindly give some suggestions. Thank you Kavya On Wed, Dec 12, 2012 at 3:23 PM, Kavyashree M wrote: > Dear users, > > Am I clear with the question? > > Thank you > Kavya > > > On Wed, Dec 12, 2012 at 1:36 PM, Kavyashre

[gmx-users] Re: g_sas : Total surface area

2012-12-12 Thread Kavyashree M
Dear users, Am I clear with the question? Thank you Kavya On Wed, Dec 12, 2012 at 1:36 PM, Kavyashree M wrote: > Dear users, > > I was calculating solvent accessible surface area for a trajectory > using g_sas. I used an index file with 3 sets (A, B, C) of mutually > exclusi

Re: [gmx-users] Asymmetry in homo dimer simulation

2012-12-06 Thread Kavyashree M
you Kavya On Thu, Dec 6, 2012 at 3:56 PM, Erik Marklund wrote: > > 5 dec 2012 kl. 17.26 skrev Justin Lemkul: > > > > > > > On 12/5/12 11:21 AM, Kavyashree M wrote: > >> Sir, > >> > >> Thank you for your suggestions. I decided the cuto

Re: [gmx-users] Asymmetry in homo dimer simulation

2012-12-05 Thread Kavyashree M
Sir, Oh! Thanks for good suggestion. Will find a way out. Kavya On Wed, Dec 5, 2012 at 9:56 PM, Justin Lemkul wrote: > > > On 12/5/12 11:21 AM, Kavyashree M wrote: > >> Sir, >> >> Thank you for your suggestions. I decided the cutoff based on >> RMSD conver

Re: [gmx-users] Asymmetry in homo dimer simulation

2012-12-05 Thread Kavyashree M
. But Is there any other way by which I can prove this point? Thank you Kavya On Wed, Dec 5, 2012 at 9:46 PM, Justin Lemkul wrote: > > > On 12/5/12 11:13 AM, Kavyashree M wrote: > >> Sir, >> >> Thank you for the reply. Total simulated time is 50ns. >> fi

Re: [gmx-users] Asymmetry in homo dimer simulation

2012-12-05 Thread Kavyashree M
Dear users, One more question is. Is there a way to prove my point? Thank you Kavya On Wed, Dec 5, 2012 at 9:43 PM, Kavyashree M wrote: > Sir, > > Thank you for the reply. Total simulated time is 50ns. > first 4ns is left and only 4-50ns were considered for > rmsf calculations.

Re: [gmx-users] Asymmetry in homo dimer simulation

2012-12-05 Thread Kavyashree M
simulation per temperature. And this happened in two proteins that I had simulated both are form mesophilic origin. Thank you Kavya On Wed, Dec 5, 2012 at 9:36 PM, Justin Lemkul wrote: > > > On 12/5/12 10:56 AM, Kavyashree M wrote: > >> Dear users, >> >> I have s

[gmx-users] Re: Dimer jumping during simulation

2012-12-01 Thread Kavyashree M
Dear users, I used -center along with -pbc mol selecting protein for both options Its fine now both monomers are in the box. Thanks kavya On Sun, Dec 2, 2012 at 1:47 AM, Kavyashree M wrote: > Dear users, > > I have simulated a protein dimer using OPLS-AA in 4.5.3 version. &g

[gmx-users] Dimer jumping during simulation

2012-12-01 Thread Kavyashree M
Dear users, I have simulated a protein dimer using OPLS-AA in 4.5.3 version. Analysing simulation showed that one of the monomer is out side the box. I tried trjconv pbc -nojump and trjconv -pbc mol still some fraction of a time one of them goes out. Can anyone suggest some solution to this. I nee

Re: [gmx-users] problem in running md simulation

2012-11-16 Thread Kavyashree M
regarding this will be helpful for the users. bye kavya On Fri, Nov 16, 2012 at 8:52 PM, Justin Lemkul wrote: > > > On 11/16/12 10:10 AM, Kavyashree M wrote: > >> Hi Ananya, >> >> Can you try with rvwd 0.9nm and rcolumb with 1.4nm..? >> vdw interactio

Re: [gmx-users] problem in running md simulation

2012-11-16 Thread Kavyashree M
Hi Ananya, Can you try with rvwd 0.9nm and rcolumb with 1.4nm..? vdw interaction decreases as 1/r^6, while columbic interaction decreases as (1/r).. so it would be better if you consider columbic interaction for longer distance than vdw interaction.. bye kavya On Fri, Nov 16, 2012 at 8:32 PM, an

Re: [gmx-users] how to restart a stopped simulation

2012-11-11 Thread Kavyashree M
Hi Ananya, You can refer this. http://www.gromacs.org/Documentation/How-tos/Doing_Restarts?highlight=restarting bye kavya On Mon, Nov 12, 2012 at 11:27 AM, ananyachatterjee < ananyachatter...@iiserkol.ac.in> wrote: > > Hi all, > > my simulation has stopped due to power failure, can anyone tell m

Re: [gmx-users] how to check the intermediate coordinated even when the simulation is running

2012-11-09 Thread Kavyashree M
Hi ananya, You can get the coordinates using trjconv: trjconv -f -s -o -b -e this will give you pdb at the time you have mentioned. For your first question- as far as I know you need to check whether there is any periodic image violation using g_mindist. Other things what you have to check d

Re: [gmx-users] g_saltbr speed

2012-07-13 Thread Kavyashree M
Ok... I will try other options. Thanks Kavya On Fri, Jul 13, 2012 at 10:23 PM, Justin A. Lemkul wrote: > > > On 7/13/12 12:05 PM, Kavyashree M wrote: >> >> Its 50ns 25000 frames. the xtc file is 695MB. it has 16GB RAM. So will >> that be insufficient? I have previous

Re: [gmx-users] g_saltbr speed

2012-07-13 Thread Kavyashree M
its not so. Thank you kavya On Fri, Jul 13, 2012 at 9:22 PM, Justin A. Lemkul wrote: > > > On 7/13/12 11:50 AM, Kavyashree M wrote: >> >> Dear users, >> >> Its the continuation of the question I asked yesterday, Inorder to reduce >> the memory usage

Re: [gmx-users] g_saltbr speed

2012-07-13 Thread Kavyashree M
stopped when i was using the whole trajectory. I tried with -dt 2, still the same problem exists. Kindly suggest a way out of this situation. Thank you With Regards Kavya On Thu, Jul 12, 2012 at 6:11 PM, Kavyashree M wrote: > Dear Sir, > > Thank you It worked :). a very usefull suggestion.

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
Dear Sir, Thank you It worked :). a very usefull suggestion. But it did not promt to choose any option. I used index file. Thank you Kavya On Thu, Jul 12, 2012 at 6:02 PM, Justin A. Lemkul wrote: > > > On 7/12/12 8:31 AM, Kavyashree M wrote: >> >> Ok may be i need to spe

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
Ok may be i need to specify an index file. I will try that. And regarding the WARNING: this .tpx file is not fully functional. I hope it will work fine enough to finish g_saltbr calculation? Thanks Kavya On Thu, Jul 12, 2012 at 5:59 PM, Kavyashree M wrote: > I read that. but while execut

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
I read that. but while executing tpbconv i did not see where i can specify that i do not want solvent? Thanks Kavya On Thu, Jul 12, 2012 at 5:47 PM, Justin A. Lemkul wrote: > > > On 7/12/12 8:15 AM, Kavyashree M wrote: >> >> Dear Sir, >> >> I had a problem aga

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
me to go this way.. it appears quite complicated! Thank you Kavya On Thu, Jul 12, 2012 at 4:52 PM, Kavyashree M wrote: > Thanks :). will check whether it makes it faster. > > On Thu, Jul 12, 2012 at 4:27 PM, Justin A. Lemkul wrote: >> >> >> On 7/12/12 6:38 AM, Kavyashre

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
Thanks :). will check whether it makes it faster. On Thu, Jul 12, 2012 at 4:27 PM, Justin A. Lemkul wrote: > > > On 7/12/12 6:38 AM, Kavyashree M wrote: >> >> Dear Sir, >> >> That is true as the number of the frames increased the >> memory had almost rea

Re: [gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
suggestions? Thank you Kavya On Thu, Jul 12, 2012 at 3:39 PM, Justin A. Lemkul wrote: > > > On 7/12/12 4:51 AM, Kavyashree M wrote: >> >> Dear Gromacs users, >> >> I was running the saltbridge calculations for a dimeric >> protein simulation using g_saltbr, But it

[gmx-users] g_saltbr speed

2012-07-12 Thread Kavyashree M
Dear Gromacs users, I was running the saltbridge calculations for a dimeric protein simulation using g_saltbr, But its taking very long time, almost four days still its not completed. Could anyone has suggestion regarding this issue? I am using the same system - Intel(R) Core(TM) i7-2600 CPU @ 3.4

[gmx-users] homodimer simulation

2012-01-10 Thread Kavyashree M
Dear user, I simulated a homodimer of 238aa each with oplsaa forcefield using gromacs-4.5.3. But while calculating the rmsf plot I got a plot in which starting and ending residue were connected by a straight line along with the actual rmsf plot. Also the two rmsf plots that it gave were slightly d

Re: [gmx-users] Number of nodes

2011-10-31 Thread Kavyashree M
giving error for not having sufficient data for 512 nodes. I have run the same job on 8 nodes in i7 machine. Thank you With Regards Kavya On Mon, Oct 31, 2011 at 5:47 PM, Justin A. Lemkul wrote: > > > Kavyashree M wrote: > >> Dear Users, >> >> I was trying to run a s

[gmx-users] Number of nodes

2011-10-31 Thread Kavyashree M
Dear Users, I was trying to run a simulation (gromacs4.5.3) on a Bluegene/L machine. But I was unable to run. System admin say that I need to change the input file. I am not sure what needs to be changed in the input file which specifies no. of nodes usage. I am not familiar with the bluegene mac

Re: [gmx-users] High temperature Simulation

2011-10-18 Thread Kavyashree M
Ok Thanks. On Tue, Oct 18, 2011 at 4:41 PM, Justin A. Lemkul wrote: > > > Kavyashree M wrote: > >> Hello, >> >> Thank you. I got the point but I have a doubt, >> "equilibrate under NPT until the pressure and >> temperature are stable, then switch

Re: [gmx-users] High temperature Simulation

2011-10-18 Thread Kavyashree M
Hello, Thank you. I got the point but I have a doubt, "equilibrate under NPT until the pressure and temperature are stable, then switch to NVT to eliminate the boiling issue", how exactly it will eliminate the boiling issue if we dont use higher pressure while equlibrating? (as you said that it is

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