Re: [gmx-users] set computer time on REMD simulation
Sorry, it seems that I did not express my problem clearly. I add "-maxh 0.1", it should be terminated until 10 minutes maximumly. However, the MD did not stop after over one hour. At 2017-12-18 15:48:10, "Qinghua Liao" wrote: >Hello, > >If I understand correctly, it terminates at 0.99*t, t is the time you >set in hour. >In you case, you simulation should be terminated at 0.1*0.99 = 0.099 h, >which is 5.94 minutes. > >PS: 0.1 h is not 10 minutes, but 6 minutes. > >All the best, >Qinghua > >On 12/18/2017 08:05 AM, YanhuaOuyang wrote: >> Dear gromacs user, >> The computing workstation I used has a limited time: 6 hours, >> namely the REMD will be terminated after 6 hours. So I add option "-maxh >> 0.1" in the MD commands to test. The md commands are as below: >> mdrun_mpi -s remd_.tpr -multi 20 -replex 1000 -x remd_.xtc -cpo >> remd_.cpt -e remd_.edr -g remd_.log -c remd_.gro -maxh 0.1 >> >> However the REMD did not terminate after the test time, 10 minutes. >> Why the option "-maxh 0.1" did not work? >> How to solve the limited time problem? >> >> Ouyang, >> Best regards > >-- >Gromacs Users mailing list > >* Please search the archive at >http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! > >* Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > >* For (un)subscribe requests visit >https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a >mail to gmx-users-requ...@gromacs.org. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
[gmx-users] Grompp error : Incorrect number of parameters
Dear all For grompp em.mdp I get an error ERROR 1 [file THC.itp, line 89]: Incorrect number of parameters - found 2, expected 4 or 8 for U-B. My itp file as follows [ angles ] 1 2 29 579.178 109.588 *{Line 89}* 1 2 3 532.192 112.817 2 3 31 551.424 109.189 >From the manual chapter 5, function of U-B is 5. And it works fine for function type 2 and 8. Any thing better could be done? *PS: The itp file is constructed from parameter file of ffTK.* Thank you -- *Regards,* *Rahul Suresh* *Research Scholar* *Bharathiar University* *Coimbatore* -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] WHAM
This has nothing to do with your initial question, but I there are a few misconceptions in your last email that you should be aware of. First, you don't need "special computers" to run or compile gromacs. It helps to have multiple compute nodes at your disposal, but it isn't a requirement *per se*. Also, you don't need to be root to compile your own gromacs installation. You can indeed install your own gromacs version on the cluster you use to run your simulations. Finally, version 2018 is still a beta testing version, so it's probably not a good idea to use it until it's released as a stable version. P.S.: Justin does a lot more than the average mortal, specially when it comes to MD simulations and Gromacs. However, no one ever knows everything. Cheers, J On Mon, Dec 18, 2017 at 8:57 AM, rose rahmani wrote: > Dear Justin,I don't have special computers to be compatible with these > softwares and run complex calculations.So i have to connect to some > computers which is not mine and the old version is installed there.i can't > update them because i'm just a normal user and not a root one! So there are > two choices; not using GROMACS at all OR be convinced with the old > versions. i choose latter! > WHO don't like an upgraded software sir?! you are not talking with a > headstrong person ;) i like to use V.2018 but it's not possible for me, i > hope you understand me.💜Just this! > You are talking with 3 months experienced student without any experience in > any similar simulation software before! > > I agree with you Alex he is a modest person ;) > I understand sometimes it's not possible to say what the problem exactly > is, but i ask to know if you had these problems before how did you solve it > in your system, yes maybe it couldn't be the right answer for another's > system but maybe a clue for someone! > > You have helped me many times and i really appreciate you for your > attentions and kindness > > Thank you again dear Justin and Alex > Best regards > > -Rose > > On Mon, Dec 18, 2017 at 12:52 AM, Alex wrote: > > > Rose, > > > > Although in my opinion Justin does know everything, the problem is with > > your question. You've posted the same thing over and over (and over), and > > noone replied -- this could be an indicator that people simply have > nothing > > to say. We don't know anything about your system, we don't know whether > it > > is stable, what is its dynamics, etc, etc. On top of this, you are using > a > > very outdated Gromacs version. > > > > From my own experience with all versions above 5.0.x, pull in Gromacs > does > > work well, as long as your system behaves as expected without pulling, > and, > > once that has been confirmed, you use a properly selected set of pull > > parameters. There are basic procedures for checking your system _prior > to_ > > production simulations involving external stimuli (fields, pulling, etc) > -- > > please follow them. And please, Please be mindful of what this message > > board is, and especially of what it is not. > > > > Good luck! > > > > Alex > > > > > > > > On 12/17/2017 1:44 PM, Justin Lemkul wrote: > > > >> > >> > >> On 12/17/17 3:39 PM, Rose wrote: > >> > >>> Why you don't answer me?is there anything wrong in my question? > >>> > >> > >> Contrary to popular opinion, I don't know everything :) If I don't reply > >> to a question, it is because I have nothing useful to contribute. > >> > >> But since you asked, diagnosing what appears to be buggy behavior in > >> wildly outdated (and unsupported, as I warned you) versions of the code > is > >> not a wise use of time. Upgrade to the latest version and try again. > >> > >> -Justin > >> > >> Thank you > >>> > >>> Sent from my iPhone > >>> > >>> On Dec 17, 2017, at 17:36, rose rahmani wrote: > > Hi, > > I try to use umbrella sampling for calculating PMF. i change distance > between protein and ZNS nanosheet. I use gomacsV4.5.4 > > after minimization and equilibration. i use: > > grompp -f md_pull.mdp -c npt.gro -p topol.top -n index.ndx -o pull.tpr > this is md_pull.mdp: > integrator = md > dt = 0.002 > nsteps = 100 > nstxout = 5000 > nstvout = 5000 > nstfout = 500 > nstlog = 500 > nstenergy= 1000 > nstxtcout= 1000 > nstlist = 10 > rlist= 1.5 > coulombtype = pme > rcoulomb = 1.5 > vdwtype = Switch > rvdw_switch = 1.0 > rvdw = 1.2 > pcoupl = no > gen_vel = no > constraints = h-bonds > ns_type = grid > pbc = xy > freezegrps = WAL ZnS > freezedim
Re: [gmx-users] WHAM
On 12/18/2017 1:14 AM, João Henriques wrote: First, you don't need "special computers" to run or compile gromacs. It helps to have multiple compute nodes at your disposal, but it isn't a requirement *per se*. Also, you don't need to be root to compile your own gromacs installation. You can indeed install your own gromacs version on the cluster you use to run your simulations. Well, I do need "special computers" to run GMX. :) Jokes aside, this is a solid point -- even if one uses a Windows machine, virtualbox+linux+gromacs is always useful to tinker at home for when you have no access to the "special computer." That, or cygwin, although that thing nauseates me. Rose, if you are a student, it would be a good idea to ask for better instruction from your professors. This board is quite limited in replacing the kind of instruction you may need. Three months is actually a reasonable amount of time to get the basics of MD and Gromacs right. Without those basics, it is completely pointless to try doing any work. Alex On Mon, Dec 18, 2017 at 8:57 AM, rose rahmani wrote: Dear Justin,I don't have special computers to be compatible with these softwares and run complex calculations.So i have to connect to some computers which is not mine and the old version is installed there.i can't update them because i'm just a normal user and not a root one! So there are two choices; not using GROMACS at all OR be convinced with the old versions. i choose latter! WHO don't like an upgraded software sir?! you are not talking with a headstrong person ;) i like to use V.2018 but it's not possible for me, i hope you understand me.💜Just this! You are talking with 3 months experienced student without any experience in any similar simulation software before! I agree with you Alex he is a modest person ;) I understand sometimes it's not possible to say what the problem exactly is, but i ask to know if you had these problems before how did you solve it in your system, yes maybe it couldn't be the right answer for another's system but maybe a clue for someone! You have helped me many times and i really appreciate you for your attentions and kindness Thank you again dear Justin and Alex Best regards -Rose On Mon, Dec 18, 2017 at 12:52 AM, Alex wrote: Rose, Although in my opinion Justin does know everything, the problem is with your question. You've posted the same thing over and over (and over), and noone replied -- this could be an indicator that people simply have nothing to say. We don't know anything about your system, we don't know whether it is stable, what is its dynamics, etc, etc. On top of this, you are using a very outdated Gromacs version. From my own experience with all versions above 5.0.x, pull in Gromacs does work well, as long as your system behaves as expected without pulling, and, once that has been confirmed, you use a properly selected set of pull parameters. There are basic procedures for checking your system _prior to_ production simulations involving external stimuli (fields, pulling, etc) -- please follow them. And please, Please be mindful of what this message board is, and especially of what it is not. Good luck! Alex On 12/17/2017 1:44 PM, Justin Lemkul wrote: On 12/17/17 3:39 PM, Rose wrote: Why you don't answer me?is there anything wrong in my question? Contrary to popular opinion, I don't know everything :) If I don't reply to a question, it is because I have nothing useful to contribute. But since you asked, diagnosing what appears to be buggy behavior in wildly outdated (and unsupported, as I warned you) versions of the code is not a wise use of time. Upgrade to the latest version and try again. -Justin Thank you Sent from my iPhone On Dec 17, 2017, at 17:36, rose rahmani wrote: Hi, I try to use umbrella sampling for calculating PMF. i change distance between protein and ZNS nanosheet. I use gomacsV4.5.4 after minimization and equilibration. i use: grompp -f md_pull.mdp -c npt.gro -p topol.top -n index.ndx -o pull.tpr this is md_pull.mdp: integrator = md dt = 0.002 nsteps = 100 nstxout = 5000 nstvout = 5000 nstfout = 500 nstlog = 500 nstenergy= 1000 nstxtcout= 1000 nstlist = 10 rlist= 1.5 coulombtype = pme rcoulomb = 1.5 vdwtype = Switch rvdw_switch = 1.0 rvdw = 1.2 pcoupl = no gen_vel = no constraints = h-bonds ns_type = grid pbc = xy freezegrps = WAL ZnS freezedim= Y Y Y Y Y Y energygrp-excl = WAL WAL ZnS ZnS energygrps = SOL WAL ZnS Protein NA CL nwall= 2 wall-atomtype= C C wall-type
Re: [gmx-users] WHAM
What you will do if you don't have a responsible professor? I tried to install GROMACS in my computer vmware>Ubuntu>... but it wasn't successful and I couldn't.Anyway, you're right I shouldn't discuss these problems here. Thanks again -Rose Sent from my iPhone > On Dec 18, 2017, at 11:58, Alex wrote: > >> On 12/18/2017 1:14 AM, João Henriques wrote: >> First, you don't need "special computers" to run or compile gromacs. It >> helps to have multiple compute nodes at your disposal, but it isn't a >> requirement *per se*. Also, you don't need to be root to compile your own >> gromacs installation. You can indeed install your own gromacs version on >> the cluster you use to run your simulations. > Well, I do need "special computers" to run GMX. :) > Jokes aside, this is a solid point -- even if one uses a Windows machine, > virtualbox+linux+gromacs is always useful to tinker at home for when you have > no access to the "special computer." That, or cygwin, although that thing > nauseates me. > > Rose, if you are a student, it would be a good idea to ask for better > instruction from your professors. This board is quite limited in replacing > the kind of instruction you may need. Three months is actually a reasonable > amount of time to get the basics of MD and Gromacs right. Without those > basics, it is completely pointless to try doing any work. > > Alex > > >> >>> On Mon, Dec 18, 2017 at 8:57 AM, rose rahmani wrote: >>> >>> Dear Justin,I don't have special computers to be compatible with these >>> softwares and run complex calculations.So i have to connect to some >>> computers which is not mine and the old version is installed there.i can't >>> update them because i'm just a normal user and not a root one! So there are >>> two choices; not using GROMACS at all OR be convinced with the old >>> versions. i choose latter! >>> WHO don't like an upgraded software sir?! you are not talking with a >>> headstrong person ;) i like to use V.2018 but it's not possible for me, i >>> hope you understand me.💜Just this! >>> You are talking with 3 months experienced student without any experience in >>> any similar simulation software before! >>> >>> I agree with you Alex he is a modest person ;) >>> I understand sometimes it's not possible to say what the problem exactly >>> is, but i ask to know if you had these problems before how did you solve it >>> in your system, yes maybe it couldn't be the right answer for another's >>> system but maybe a clue for someone! >>> >>> You have helped me many times and i really appreciate you for your >>> attentions and kindness >>> >>> Thank you again dear Justin and Alex >>> Best regards >>> >>> -Rose >>> On Mon, Dec 18, 2017 at 12:52 AM, Alex wrote: Rose, Although in my opinion Justin does know everything, the problem is with your question. You've posted the same thing over and over (and over), and noone replied -- this could be an indicator that people simply have >>> nothing to say. We don't know anything about your system, we don't know whether >>> it is stable, what is its dynamics, etc, etc. On top of this, you are using >>> a very outdated Gromacs version. From my own experience with all versions above 5.0.x, pull in Gromacs >>> does work well, as long as your system behaves as expected without pulling, >>> and, once that has been confirmed, you use a properly selected set of pull parameters. There are basic procedures for checking your system _prior >>> to_ production simulations involving external stimuli (fields, pulling, etc) >>> -- please follow them. And please, Please be mindful of what this message board is, and especially of what it is not. Good luck! Alex > On 12/17/2017 1:44 PM, Justin Lemkul wrote: > > >> On 12/17/17 3:39 PM, Rose wrote: >> >> Why you don't answer me?is there anything wrong in my question? > Contrary to popular opinion, I don't know everything :) If I don't reply > to a question, it is because I have nothing useful to contribute. > > But since you asked, diagnosing what appears to be buggy behavior in > wildly outdated (and unsupported, as I warned you) versions of the code >>> is > not a wise use of time. Upgrade to the latest version and try again. > > -Justin > > Thank you >> Sent from my iPhone >> >>> On Dec 17, 2017, at 17:36, rose rahmani wrote: >>> Hi, >>> >>> I try to use umbrella sampling for calculating PMF. i change distance >>> between protein and ZNS nanosheet. I use gomacsV4.5.4 >>> >>> after minimization and equilibration. i use: >>> >>> grompp -f md_pull.mdp -c npt.gro -p topol.top -n index.ndx -o pull.tpr >>> this is md_pull.mdp: >>> integrator = md >>> dt = 0.002 >>> nsteps = 100 >
[gmx-users] PME computation for triclinic box
Good morning, I'd like to ask how PME computations for triclinic box are done in Gromacs. I'd like to compute electric field for my triclinic box and I'm not sure that I understand correctly how it's done in Gromacs. Sincerely, Mariia -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] GROMACS 2018 second beta
Dear Mark, Thank you for all of your efforts. I wish you added an option for applying external magnetic field in this version. Thanks Ali On Mon, Dec 11, 2017 at 8:54 PM, Mark Abraham wrote: > Hi GROMACS users, > > The second beta release of GROMACS 2018 is available! (We know it's only > 2017 right now, but by the time we make the real release it will be almost > 2018, so that seems like a good idea!) > > We are making this available to you to get an early taste of how GROMACS > 2018 will look and work, and most importantly to get feedback from you > about how well things work. While we try our hardest to keep the quality of > GROMACS as high as possible, we’re human, we overlook things while doing > other things, and we need your many pairs of eyes to help build a tool that > we can all use to do good science! We really need you to test your kinds of > simulation on your hardware, both for correctness and performance. This is > particularly important if you are using "interesting" hardware or > compilers, because we can't test all of them! > > We've fixed a number of minor issues that users and developers identified - > please do try out the new version to see if you agree that things have been > fixed where we think they have. No major issues have been identified, which > is very good news. See the release notes for details. > > Please do not use this version for doing science you plan to publish - it > needs more testing before it’s reliable enough for that. Similarly, please > don’t use this version as a base for a project that bundles or forks > GROMACS. > > What new things can you expect? (See the release notes for more details.) > * support for PME running on a GPU > * improvements for performance of the short-ranged scheme, particularly on > GPUs, through optimizing the pair-list handling > * support for the AWH adaptive biasing scheme > * new simulation quality checks on physical properties of the integrator > * CPU-side enhancements from adding some or better SIMD support to several > computations > * more reporting of conserved quantities for integrators > > Just so you know, a fair bit of the work done since 2016 has been > re-organizational, rather than new features or faster performance. > > There’s lots of other new things, and a few old things removed - please see > the link to the release notes. All the content of GROMACS 2016.4 (plus > several yet-to-be-released bug fixes) is present, apart from features that > have been removed. > > If all goes to plan, we hope to ship the final 2018 release in time for the > New Year, but that relies on people joining in and helping us test! We hope > you will consider making that contribution, so that we can continue to > deliver high-quality free simulation software that will be useful to you on > January 1. > > You can find the code, manual, release notes, installation instructions and > testsuite at the links below. > > Code: ftp://ftp.gromacs.org/pub/gromacs/gromacs-2018-beta2.tar.gz > Documentation: http://manual.gromacs.org/documentation/2018-beta2/ > index.html > (includes install guide, user guide, reference manual) > Release Notes: > http://manual.gromacs.org/documentation/2018-beta2/ReleaseNotes/index.html > Test Suite: > http://gerrit.gromacs.org/download/regressiontests-2018-beta2.tar.gz > > Happy testing! > > Mark Abraham > GROMACS Development Manager > -- > Gromacs Users mailing list > > * Please search the archive at http://www.gromacs.org/ > Support/Mailing_Lists/GMX-Users_List before posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
[gmx-users] Free energy perturbation - table extension and blowing system
Hi, I want to calculate 'solvation' energy of lutein in bilayer and water by Free Energy Perturbation. When I'm running a normal MD, or some kind of steering dynamics,my system works just fine. After addition of FEP parameters, em runs, but instantly returns series of warnings: WARNING: Listed nonbonded interaction between particles 6461 and 6482 at distance 2.545 which is larger than the table limit 2.200 nm. This is likely either a 1,4 interaction, or a listed interaction inside a smaller molecule you are decoupling during a free energy calculation. Since interactions at distances beyond the table cannot be computed, they are skipped until they are inside the table limit again. You will only see this message once, even if it occurs for several interactions. IMPORTANT: This should not happen in a stable simulation, so there is probably something wrong with your system. Only change the table-extension distance in the mdp file if you are really sure that is the reason. The same thing repeats for several pairs of atoms, only in one transmembrane molecule. As I said, everything is fine without FEP parameters. For this instance I'm using the following parameters adapted stright from the Bevanlab tutorial: ; Run control integrator = steep nsteps = 5000 ; EM criteria and other stuff emtol= 100 emstep = 0.01 niter= 20 nbfgscorr= 10 ; Output control nstlog = 1 nstenergy= 1 ; Neighborsearching and short-range nonbonded interactions cutoff-scheme= verlet nstlist = 1 ns_type = grid pbc = xyz rlist= 1.2 ; Electrostatics coulombtype = PME rcoulomb = 1.2 ; van der Waals vdwtype = cutoff vdw-modifier = potential-switch rvdw-switch = 1.0 rvdw = 1.2 ; Apply long range dispersion corrections for Energy and Pressure DispCorr = EnerPres ; Spacing for the PME/PPPM FFT grid fourierspacing = 0.12 ; EWALD/PME/PPPM parameters pme_order= 6 ewald_rtol = 1e-06 epsilon_surface = 0 ; Temperature and pressure coupling are off during EM tcoupl = no pcoupl = no ; Free energy control stuff free_energy = yes init_lambda_state= 0 delta_lambda = 0 calc_lambda_neighbors= 1 ; Vectors of lambda specified here ; Each combination is an index that is retrieved from init_lambda_state for each simulation ; init_lambda_state012345678 910 11 12 13 14 15 16 17 18 19 20 vdw_lambdas = 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 coul_lambdas = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ; We are not transforming any bonded or restrained interactions bonded_lambdas = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 restraint_lambdas= 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ; Masses are not changing (particle identities are the same at lambda = 0 and lambda = 1) mass_lambdas = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ; Not doing simulated temperting here temperature_lambdas = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ; Options for the decoupling sc-alpha = 0.5 sc-coul = no sc-power = 1.0 sc-sigma = 0.3 couple-moltype = lutein couple-lambda0 = vdw couple-lambda1 = none couple-intramol = no nstdhdl = 10 ; No velocities during EM gen_vel = no ; options for bonds constraints = h-bonds ; Type of constraint algorithm constraint-algorithm = lincs ; Do not constrain the starting configuration continuation = no ; Highest order in the expansion of the constraint coupling matrix lincs-order = 12 What I've tried by now and didn't work: - I've tried to increase table extension, but it didn't do any good. - I've tried to change the charge groups, which are now 1 atom = 1 group for this molecule - I was trying to solve this with gromacs 4, 5 and 16'. Warnings were similar. If I try to run further FEP steps the system with FEP parameters blows up. MD without FEP simulates doesn't cause any problems. My guess is I'm missing something inside FEP parameters. I'm using GROMACS for several years by now and for the first time I can't solve the problem by myself.
[gmx-users] g_mindsit contact analysis
Hi all, I have simulated a duplex RNA in presence of a CNT in aqueous medium. The gromacs version I used was 4.5.6. The two species were kept 2 nm apart to begin with. I wanted to calculate how many RNA atoms were within 4 angstrom distance from the CNT on a per-frame trajectory basis. I used the following command: g_mindist -f md.xtc -s md.tpr -d 0.4 -n index.ndx -on nc.xvg The CNT is composed of 1500 atoms while the nucleic acid is 370. The contacts I am getting as a function of time is ~2000. Why is the value so large? I did not specify COM or any particular atom belonging to CNT in my index file and when prompted I selected the entire CNT and RNA for g_mindist analysis. Is the number large because it calculates all the atomic contacts between the two structures and prints it in the .xvg file? For example, at 100 ps if each carbon atom is having at least two RNA contacts then the total contacts will be 3000. Is it being calculated this way or something else is going on? Thank you for your answer in advance Soumadwip Ghosh -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] Measuring distance to the nearest image
Just wondering whether anyone has had any luck with a similar problem? If not, I’ll knock a script together and make it available. I was hoping not to reinvent the wheel if there was already a way. Regards Anthony On 18/12/2017 06:23, "gromacs.org_gmx-users-boun...@maillist.sys.kth.se on behalf of Anthony Nash" wrote: Hi all, I am trying to measure the distance between the COM of two side chain functional groups across the periodic boundary to their nearest image rather than across the unit cell itself. I have tried several gromacs distance commands with no success and more at random as I trawl through the help and manual, so I won’t replicate those commands here. This link is a hand drawn image of what I am trying to do. I would like to measure how far apart the two large dots are across the periodic boundary. VMD gives me roughly 1 nm, but the Gromacs commands give me 8 nm as it takes the measurement from within the unit cell. https://www.researchgate.net/profile/Anthony_Nash3/post/How_to_calculate_distance_between_groups_into_the_nearest_image_using_Gromacs/attachment/5a30d10eb53d2f0bba43e5c3/AS:571001131417600@1513148686095/image/IMG_20171213_065534.jpg If this involve a tcl script in VMD I would appreciate knowing how to code for an atom selection in a “Periodic” image rather than the “Self”. Loads of thanks! Anthony -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
[gmx-users] PROTEIN FOLDING
Hi gromacs users, After MD simulation of protein-ligand complex for 5ns, can we view protein folding? How to do it? I want to ascertain if there is any conformation change in protein where the ligand binds. Is it possible? We observe hydrogen bonds through molecular docking. Hence, I want to make observation through MD simulation which is not obtained through docking. Can someone help me regarding this? Thank you very much in advance. Thanks, Neha -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] PROTEIN FOLDING
After MD simulation of protein-ligand complex for 5ns, can we view protein folding? mostly, NO Search what time range 'protein folding' is happening. How to do it? I want to ascertain if there is any conformation change in protein where the ligand binds. Is it possible? You might want to do PCA, RMSD and DSSP We observe hydrogen bonds through molecular docking. Hence, I want to make observation through MD simulation which is not obtained through docking. gmx hbond Can someone help me regarding this? i really wondering what is possible in 5 ns simulation time, you may try to extend it up to 100 ns or atleast a 50 ns. Thank you very much in advance. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
[gmx-users] GROMACS 2018 third beta release
Hi GROMACS users, The third and final beta release of GROMACS 2018 is available! (We know it's only 2017 right now, but by the time we make the real release it will be almost 2018, so that seems like a good idea!) We'll issue a release candidate shortly, and the final release very early in the new year, unless any problems come to light. We are making this available to you to get an early taste of how GROMACS 2018 will look and work, and most importantly to get feedback from you about how well things work. While we try our hardest to keep the quality of GROMACS as high as possible, we’re human, we overlook things while doing other things, and we need your many pairs of eyes to help build a tool that we can all use to do good science! We really need you to test your kinds of simulation on your hardware, both for correctness and performance. This is particularly important if you are using "interesting" hardware or compilers, because we can't test all of them! We've fixed a number of minor issues that users and developers identified - please do try out the new version to see if you agree that things have been fixed where we think they have. No major issues have been identified, which is very good news. See the release notes for details. Please do not use this version for doing science you plan to publish - it needs more testing before it’s reliable enough for that. Similarly, please don’t use this version as a base for a project that bundles or forks GROMACS. What new things can you expect? (See the release notes for more details.) * support for PME running on a GPU * improvements for performance of the short-ranged scheme, particularly on GPUs, through optimizing the pair-list handling * support for the AWH adaptive biasing scheme * new simulation quality checks on physical properties of the integrator * CPU-side enhancements from adding some or better SIMD support to several computations * more reporting of conserved quantities for integrators Just so you know, a fair bit of the work done since 2016 has been re-organizational, rather than new features or faster performance. There’s lots of other new things, and a few old things removed - please see the link to the release notes. All the content of GROMACS 2016.4 (plus several yet-to-be-released bug fixes) is present, apart from features that have been removed. If all goes to plan, we hope to ship the final 2018 release in time for the New Year, but that relies on people joining in and helping us test! We hope you will consider making that contribution, so that we can continue to deliver high-quality free simulation software that will be useful to you on January 1. You can find the code, manual, release notes, installation instructions and testsuite at the links below. Code: ftp://ftp.gromacs.org/pub/gromacs/gromacs-2018-beta3.tar.gz Documentation: http://manual.gromacs.org/documentation/2018-beta3/index.html (includes install guide, user guide, reference manual) Release Notes: http://manual.gromacs.org/documentation/2018-beta3/ReleaseNotes/index.html Test Suite: http://gerrit.gromacs.org/download/regressiontests-2018-beta3.tar.gz Happy testing! Mark Abraham GROMACS development manager -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] PROTEIN FOLDING
On Tue, 19 Dec 2017 at 12:36 PM, Neha Gupta wrote: > Hi gromacs users, > > After MD simulation of protein-ligand complex for 5ns, can we view protein > folding? You can use various supporting tools from R language to debug your trajectory but most third party software support NAMD and charmm format. You can use VMD to convert the trajectory to dcd and use R language based packages to read your trajectory > > > How to do it? > > I want to ascertain if there is any conformation change in protein where > the ligand binds. Is it possible? > > We observe hydrogen bonds through molecular docking. Hence, I want to make > observation through MD simulation which is not obtained through docking. > > Can someone help me regarding this? > > Thank you very much in advance. > > Thanks, > Neha > -- > Gromacs Users mailing list > > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before > posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. > -- *Regards,* *Rahul Suresh* *Research Scholar* *Bharathiar University* *Coimbatore* -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] PROTEIN FOLDING
On Tue, 19 Dec 2017 at 12:36 PM, Neha Gupta wrote: > Hi gromacs users, > > After MD simulation of protein-ligand complex for 5ns, can we view protein > folding? > > How to do it? > > I want to ascertain if there is any conformation change in protein where > the ligand binds. Is it possible? > > We observe hydrogen bonds through molecular docking. Hence, I want to make > observation through MD simulation which is not obtained through docking. You can perform Clustering analysis over particular PC sub space to measure the structural changes. > > > Can someone help me regarding this? > > Thank you very much in advance. > > Thanks, > Neha > -- > Gromacs Users mailing list > > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before > posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. > -- *Regards,* *Rahul Suresh* *Research Scholar* *Bharathiar University* *Coimbatore* -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.