[gmx-users] GROMACS/ORCA QMMM

Jose Tusell jrta1981 at gmail.com
Mon Nov 21 06:06:56 CET 2011


Yes.  But where does the code go wrong?  I'm reading the qm_orca.c
file but I can't seem to know exactly were the factor of 10 is not
accounted for.  I see the factor of ten when going from gromacs to
orca in (lines 219 to 221 of qm_orca.c file):

     qm->xQM[i][XX]/0.1,
     qm->xQM[i][YY]/0.1,
     qm->xQM[i][ZZ]/0.1);

I just don't know where to look for the factor of 10 in the code.
Could anyone point me to this?

Thanks,

Jose Tusell

On Sun, Nov 20, 2011 at 10:00 PM, Justin A. Lemkul <jalemkul at vt.edu> wrote:
>
>
> Jose Tusell wrote:
>>
>> When I run gromacs with bOpt yes I run into the a problem with the
>> coordinates of my qm system: the initial coordinates are the
>> following:
>>
>> NAME = ybu_em_qmmm.inp
>> |  1> #input-file generated by gromacs
>> |  2> !QMMMOpt TightSCF
>> |  3> !PAL8 Quick-DFT VerySlowConv TightSCF KDIIS VDW EnGrad NoUseSym
>> |  4> %scf
>> |  5>   Maxiter 5000
>> |  6> end
>> |  7> %pal nprocs 8
>> |  8> end
>> |  9>
>> | 10>
>> | 11>
>> | 12> %LJCOEFFICIENTS "ybu_em_qmmm.LJ"
>> | 13> *xyz -2 1
>> | 14>   7 46.4499998  40.2500010  48.1099987
>> | 15>   6 45.2400017  40.2899981  47.5600004
>> | 16>   7 44.7599983  40.6899977  46.3600016
>> | 17>   6 43.4700012  40.5999994  46.0599995
>> | 18>   7 42.6300001  40.1100016  46.9500017
>> | 19>   6 43.0100012  39.6799994  48.1699991
>> | 20>   7 42.1299982  39.1499996  49.0199995
>> | 21>   1 42.4300003  38.8100004  49.9200010
>> | 22>   1 41.1600018  39.0899992  48.7699986
>> | 23>   6 44.3400002  39.7700000  48.4999990
>> | 24>   7 45.0799990  39.4600010  49.5800018
>> | 25>   6 46.3500023  39.7600007  49.3499994
>> | 26>   6 47.7699995  40.5399990  47.4900007
>> | 27>   8 48.8000011  41.0900021  48.3400011
>> | 28>   6 49.8199987  41.7100000  47.4800014
>> | 29>   6 47.7400017  41.5500021  46.3600016
>> | 30>   8 46.9999981  41.4499998  45.1499987
>> | 31>   1 47.2300005  40.5999994  44.6799994
>> | 32>   6 49.1900015  41.9199991  46.1000013
>> | 33>   8 49.7800016  40.8699989  45.3399992
>> | 34>   1 50.7399988  41.0900021  45.1599979
>> | 35>   6 50.0799990  43.2399988  47.5799990
>> | 36>   8 51.4400005  43.5300016  47.9400015
>> | 37>  15 51.8400002  43.3099985  49.4799995
>> | 38>   8 52.1000004  44.8099995  49.9800014
>> | 39>   8 50.5700016  42.5000000  50.0600004
>> | 40>   8 53.1099987  42.3299980  49.3599987
>> | 41>  15 54.4700003  43.1799984  49.4500017
>> | 42>   8 55.5600023  42.1400023  48.8899994
>> | 43>   8 54.1200018  44.4799995  48.5599995
>> | 44>   8 54.5300007  43.5900021  50.9999990
>> | 45>  15 55.8799982  43.3500004  51.8499994
>> | 46>   8 57.0900011  43.9900017  50.9899998
>> | 47>   8 55.8300018  43.9099979  53.2200003
>> | 48>   8 56.1399984  41.7600012  51.8499994
>> | 49>   1 43.1099987  40.9200001  45.1000023
>> | 50>   1 47.1600008  39.6399999  50.0400019
>> | 51>   1 48.1400013  39.6199989  47.0900011
>> | 52>   1 47.3199987  42.4200010  46.8200016
>> | 53>   1 49.3300009  42.8999996  45.7000017
>> | 54>   1 50.7200003  41.1499977  47.4200010
>> | 55>   1 49.8600006  43.6999989  46.6300011
>> | 56>   1 49.4299984  43.6600018  48.3199978
>> | 57>  12 51.3999987  43.3799982  51.9299984
>> | 58> *
>> | 59> %pointcharges "ybu_em_qmmm.pc"
>> | 60>
>> | 61>
>> | 62>                          ****END OF INPUT****
>>
>> This first calculation doesn't run into problems however after this
>> the new coordinates are wrong by a factor of 10.
>>
>> This is the next input file generated by gromacs:
>>
>> NAME = ybu_em_qmmm.inp
>> |  1> #input-file generated by gromacs
>> |  2> !QMMMOpt TightSCF
>> |  3> !PAL8 Quick-DFT VerySlowConv TightSCF KDIIS VDW EnGrad NoUseSym
>> |  4> %scf
>> |  5>   Maxiter 5000
>> |  6> end
>> |  7> %pal nprocs 8
>> |  8> end
>> |  9>
>> | 10>
>> | 11>
>> | 12> %LJCOEFFICIENTS "ybu_em_qmmm.LJ"
>> | 13> *xyz -2 1
>> | 14>   7  4.6643215   4.0067959   4.8652828
>> | 15>   6  4.4694147   4.0687612   4.6910113
>> | 16>   7  4.4788954   4.0736303   4.5814043
>> | 17>   6  4.2882785   4.0960234   4.5192298
>> | 18>   7  4.1568694   3.9851558   4.6636197
>> | 19>   6  4.2702511   3.9942223   4.8413402
>> | 20>   7  4.1388491   3.8647231   4.9325246
>> | 21>   1  4.2422304   3.8729668   5.0225985
>> | 22>   1  4.0874949   3.9029175   4.8758829
>> | 23>   6  4.4479644   3.9264068   4.8907641
>> | 24>   7  4.4724247   3.8935867   5.0617158
>> | 25>   6  4.6581322   3.9623603   4.9860328
>> | 26>   6  4.7224784   3.9516553   4.7729388
>> | 27>   8  4.9013394   4.1037330   4.9433815
>> | 28>   6  5.0506485   4.1505158   4.7845429
>> | 29>   6  4.7479546   4.2596489   4.5867884
>> | 30>   8  4.6396983   4.1753584   4.3912268
>> | 31>   1  4.7245148   4.0333679   4.4395000
>> | 32>   6  4.9467531   4.1628179   4.5303190
>> | 33>   8  5.0127959   4.0332937   4.4357231
>> | 34>   1  5.0972128   4.1086709   4.5025694
>> | 35>   6  4.9707726   4.4155064   4.7358957
>> | 36>   8  5.1747119   4.3822494   4.7240046
>> | 37>  15  5.1759595   4.3526104   4.9696961
>> | 38>   8  5.2000558   4.5951414   5.0385225
>> | 39>   8  4.9872991   4.2056358   5.0856835
>> | 40>   8  5.3196424   4.1316289   4.9306369
>> | 41>  15  5.4781163   4.3365851   4.9144840
>> | 42>   8  5.6436682   4.1501650   4.8309124
>> | 43>   8  5.4556131   4.5460758   4.7758737
>> | 44>   8  5.4388809   4.3959689   5.1872373
>> | 45>  15  5.6339312   4.3419433   5.2184927
>> | 46>   8  5.8053279   4.4479111   5.0789297
>> | 47>   8  5.5981785   4.4297397   5.4245871
>> | 48>   8  5.6559128   4.0851763   5.2241915
>> | 49>   1  4.2944524   4.1013804   4.4863331
>> | 50>   1  4.7380015   3.9515409   5.0357658
>> | 51>   1  4.8261809   3.9258796   4.7002071
>> | 52>   1  4.7115117   4.2592505   4.6899751
>> | 53>   1  4.9388400   4.3221569   4.5484522
>> | 54>   1  5.1027077   4.0887082   4.7342393
>> | 55>   1  4.9870053   4.3987840   4.6446544
>> | 56>   1  4.9254298   4.3886098   4.8489299
>> | 57>  12  5.1316565   4.3423077   5.2266484
>> | 58> *
>> | 59> %pointcharges "ybu_em_qmmm.pc"
>> | 60>
>> | 61>
>> | 62>                          ****END OF INPUT****
>>
>> Any ideas why this is happening?
>>
>
> A factor of 10 would seem to me to be an Angstrom -> nm conversion.
>
> -Justin
>
>> Thanks,
>>
>> Jose Tusell
>>
>> On Sun, Nov 20, 2011 at 5:03 PM, Jose Tusell <jrta1981 at gmail.com> wrote:
>>>
>>> That solved it.  In the ORCA manual for version 2.8 it says to use
>>> bOpt = true instead of bOpt = yes.  And there is no mention of the mdp
>>> option in the gromacs manual or gromacs online mdp options.
>>>
>>> Ramon
>>>
>>> On Sun, Nov 20, 2011 at 4:57 PM, Jose Tusell <jrta1981 at gmail.com> wrote:
>>>>
>>>> I've tried the bOpt = true.  Is the flag bOpt = yes?  I'll try that
>>>> and I'll let you know.
>>>>
>>>> Ramon
>>>>
>>>> On Sun, Nov 20, 2011 at 1:19 PM, Christoph Riplinger
>>>> <cri at thch.uni-bonn.de> wrote:
>>>>>
>>>>> Dear Justin,
>>>>>
>>>>> The LJ and LJ.Excl files should be generated when you set bOpt = yes.
>>>>> What
>>>>> does the .inp file say. Is there !QMMMOpt or only !EnGrad?
>>>>> Christoph
>>>>>
>>>>> On 11/18/2011 06:20 PM, Jose Tusell wrote:
>>>>>>
>>>>>> Hi Justin,
>>>>>>
>>>>>> I tried using a larger step size but my system blew up...  My guess is
>>>>>> that I have a bad starting structure, I'll work on the initial
>>>>>> structure for the QM region (energy minimize).
>>>>>>
>>>>>> When I'm running ORCA I want to have a LJ file to correct for the
>>>>>> interaction of my QM system with the protein.  However this file is
>>>>>> not created when I run QMMM, I've used the bOpt = true in the mdp
>>>>>> file.  Can anyone please offer some help on how to create this LJ
>>>>>> files?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Jose Tusell
>>>>>>
>>>>>> On Thu, Nov 17, 2011 at 2:07 PM, swati patel<swatipatel088 at gmail.com>
>>>>>>  wrote:
>>>>>>>
>>>>>>> hello,
>>>>>>> I am trying to simulate streptavidin tetramer-biotin complex.I ve
>>>>>>> calculated
>>>>>>> Ligand topology from a sofware PRODRG using gromos87 force
>>>>>>> fields.After
>>>>>>> solvating it,I am getting an error using grompp command
>>>>>>>
>>>>>>> Fatal error:
>>>>>>> Atomtype HW not found
>>>>>>>
>>>>>>> can anyone provide me some help?
>>>>>>>
>>>>>>> Thanx with anticipation.
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Nov 18, 2011 at 2:29 AM, Jose Tusell<jrta1981 at gmail.com>
>>>>>>>  wrote:
>>>>>>>>
>>>>>>>> I'll try changing the step size first and if that fails I'll try
>>>>>>>> another algorithm.  Thanks for the input.
>>>>>>>>
>>>>>>>> Jose Tusell
>>>>>>>>
>>>>>>>> On Thu, Nov 17, 2011 at 11:48 AM, Justin A. Lemkul<jalemkul at vt.edu>
>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> Jose Tusell wrote:
>>>>>>>>>>
>>>>>>>>>> Hi Justin,
>>>>>>>>>>
>>>>>>>>>> Thanks for the input on why this is happening.   It sounds a
>>>>>>>>>> little
>>>>>>>>>> suspicious that the energy doesn't change after a few steps of
>>>>>>>>>> energy
>>>>>>>>>> minimization.  Do you know of any way that I can find out what is
>>>>>>>>>> going on?
>>>>>>>>>>
>>>>>>>>> The screen output should indicate the atom with maximal force.
>>>>>>>>>  Sometimes
>>>>>>>>> the EM algorithms get stuck when the geometry cannot change without
>>>>>>>>> making
>>>>>>>>> detrimental moves.  You either need a larger step size, a different
>>>>>>>>> algorithm, or a better starting structure, if that is the case.  I
>>>>>>>>> have
>>>>>>>>> seen
>>>>>>>>> this many times before, nothing suspicious about it.
>>>>>>>>>
>>>>>>>>> -Justin
>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>>
>>>>>>>>>> Jose Tusell
>>>>>>>>>>
>>>>>>>>>> On Thu, Nov 17, 2011 at 10:58 AM, Justin A.
>>>>>>>>>> Lemkul<jalemkul at vt.edu>
>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>> Jose Tusell wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> Hi Cristoph,
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for the reply.  I found that my problem was not gromacs.
>>>>>>>>>>>>  The
>>>>>>>>>>>> input that ORCA was receiving from GROMACS did not have the
>>>>>>>>>>>> correct
>>>>>>>>>>>> number of hydrogens.  I've solved this problem now and ORCA is
>>>>>>>>>>>> running
>>>>>>>>>>>> fine.  I however ran into another problem with my energy
>>>>>>>>>>>> minimization.
>>>>>>>>>>>>  The output from my gromacs log file is the following:
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            0        0.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>  Energies (kJ/mol)
>>>>>>>>>>>>         Bond          Angle    Proper Dih.  Improper Dih.
>>>>>>>>>>>>  LJ-14
>>>>>>>>>>>>  1.21899e+04    1.92496e+03    5.62567e+03    1.49141e+01
>>>>>>>>>>>>  3.68001e+03
>>>>>>>>>>>>   Coulomb-14        LJ (SR)   Coulomb (SR)   Coul. recip.
>>>>>>>>>>>>  Quantum
>>>>>>>>>>>> En.
>>>>>>>>>>>>  2.41200e+04    1.47494e+05   -5.06544e+05   -7.56009e+04
>>>>>>>>>>>> -3.96508e+06
>>>>>>>>>>>>    Potential Pressure (bar)
>>>>>>>>>>>>  -4.35218e+06   -2.10629e+04
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            1        1.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>  Energies (kJ/mol)
>>>>>>>>>>>>         Bond          Angle    Proper Dih.  Improper Dih.
>>>>>>>>>>>>  LJ-14
>>>>>>>>>>>>  1.20006e+04    1.92297e+03    5.62600e+03    1.47801e+01
>>>>>>>>>>>>  3.67746e+03
>>>>>>>>>>>>   Coulomb-14        LJ (SR)   Coulomb (SR)   Coul. recip.
>>>>>>>>>>>>  Quantum
>>>>>>>>>>>> En.
>>>>>>>>>>>>  2.41174e+04    1.46421e+05   -5.06609e+05   -7.56156e+04
>>>>>>>>>>>> -4.00402e+06
>>>>>>>>>>>>    Potential Pressure (bar)
>>>>>>>>>>>>  -4.39246e+06   -2.10739e+04
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            2        2.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>  Energies (kJ/mol)
>>>>>>>>>>>>         Bond          Angle    Proper Dih.  Improper Dih.
>>>>>>>>>>>>  LJ-14
>>>>>>>>>>>>  1.17961e+04    1.92126e+03    5.62633e+03    1.46477e+01
>>>>>>>>>>>>  3.67461e+03
>>>>>>>>>>>>   Coulomb-14        LJ (SR)   Coulomb (SR)   Coul. recip.
>>>>>>>>>>>>  Quantum
>>>>>>>>>>>> En.
>>>>>>>>>>>>  2.41145e+04    1.45528e+05   -5.06679e+05   -7.56315e+04
>>>>>>>>>>>> -4.18671e+06
>>>>>>>>>>>>    Potential Pressure (bar)
>>>>>>>>>>>>  -4.57635e+06   -2.10854e+04
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            3        3.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            4        4.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>  Energies (kJ/mol)
>>>>>>>>>>>>         Bond          Angle    Proper Dih.  Improper Dih.
>>>>>>>>>>>>  LJ-14
>>>>>>>>>>>>  1.16705e+04    1.92041e+03    5.62652e+03    1.45728e+01
>>>>>>>>>>>>  3.67282e+03
>>>>>>>>>>>>   Coulomb-14        LJ (SR)   Coulomb (SR)   Coul. recip.
>>>>>>>>>>>>  Quantum
>>>>>>>>>>>> En.
>>>>>>>>>>>>  2.41128e+04    1.45113e+05   -5.06721e+05   -7.56410e+04
>>>>>>>>>>>> -4.24486e+06
>>>>>>>>>>>>    Potential Pressure (bar)
>>>>>>>>>>>>  -4.63509e+06   -2.10913e+04
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            5        5.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            6        6.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            7        7.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            8        8.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>            9        9.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           10       10.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           11       11.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           12       12.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           13       13.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           14       14.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           15       15.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           16       16.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           17       17.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>         Step           Time         Lambda
>>>>>>>>>>>>           18       18.00000        0.00000
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Stepsize too small, or no change in energy.
>>>>>>>>>>>> Converged to machine precision,
>>>>>>>>>>>> but not to the requested precision Fmax<  1000
>>>>>>>>>>>>
>>>>>>>>>>>> Double precision normally gives you higher accuracy.
>>>>>>>>>>>> You might need to increase your constraint accuracy, or turn
>>>>>>>>>>>> off constraints alltogether (set constraints = none in mdp file)
>>>>>>>>>>>>
>>>>>>>>>>>> Why doesn't GROMACS output the energies for certain steps?  Step
>>>>>>>>>>>> 3
>>>>>>>>>>>> and
>>>>>>>>>>>> steps 5-18 do show any output in the log file.  Any ideas why
>>>>>>>>>>>> this
>>>>>>>>>>>> is
>>>>>>>>>>>> happening?
>>>>>>>>>>>>
>>>>>>>>>>> This happens for the reasons printed by mdrun - those steps
>>>>>>>>>>> caused no
>>>>>>>>>>> change
>>>>>>>>>>> in energy.
>>>>>>>>>>>
>>>>>>>>>>> -Justin
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> ========================================
>>>>>>>>>>>
>>>>>>>>>>> Justin A. Lemkul
>>>>>>>>>>> Ph.D. Candidate
>>>>>>>>>>> ICTAS Doctoral Scholar
>>>>>>>>>>> MILES-IGERT Trainee
>>>>>>>>>>> Department of Biochemistry
>>>>>>>>>>> Virginia Tech
>>>>>>>>>>> Blacksburg, VA
>>>>>>>>>>> jalemkul[at]vt.edu | (540) 231-9080
>>>>>>>>>>> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>>>>>>>>>>
>>>>>>>>>>> ========================================
>>>>>>>>>>> --
>>>>>>>>>>> gmx-users mailing list    gmx-users at gromacs.org
>>>>>>>>>>> http://lists.gromacs.org/mailman/listinfo/gmx-users
>>>>>>>>>>> Please search the archive at
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>>>>>>>>>>> posting!
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>>>>>>>>>>> interface
>>>>>>>>>>> or send it to gmx-users-request at gromacs.org.
>>>>>>>>>>> Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>>>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> ========================================
>>>>>>>>>
>>>>>>>>> Justin A. Lemkul
>>>>>>>>> Ph.D. Candidate
>>>>>>>>> ICTAS Doctoral Scholar
>>>>>>>>> MILES-IGERT Trainee
>>>>>>>>> Department of Biochemistry
>>>>>>>>> Virginia Tech
>>>>>>>>> Blacksburg, VA
>>>>>>>>> jalemkul[at]vt.edu | (540) 231-9080
>>>>>>>>> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>>>>>>>>
>>>>>>>>> ========================================
>>>>>>>>> --
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>>>>>>>> --
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>
> --
> ========================================
>
> Justin A. Lemkul
> Ph.D. Candidate
> ICTAS Doctoral Scholar
> MILES-IGERT Trainee
> Department of Biochemistry
> Virginia Tech
> Blacksburg, VA
> jalemkul[at]vt.edu | (540) 231-9080
> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>
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