ahmet yıldırım wrote:
Dear Justin,

I manually specify termini.  I choosed "None" but I have the same error.

Fatal error:
atom C not found in residue 13NH2 while combining tdb and rtp


Please post your .pdb file.

-Justin


22 Ocak 2011 00:45 tarihinde Justin A. Lemkul <jalem...@vt.edu <mailto:jalem...@vt.edu>> yazdı:



    ahmet yıldırım wrote:

        Dear justin,

        I looked at the pdb file. No NH2 reside contains carbon atom.

        What should I do?


    In this case, you need to manually specify termini.  Choose "None"
    to allow your capping groups to be built properly.

    -Justin


        22 Ocak 2011 00:18 tarihinde Justin A. Lemkul <jalem...@vt.edu
        <mailto:jalem...@vt.edu> <mailto:jalem...@vt.edu
        <mailto:jalem...@vt.edu>>> yazdı:




           ahmet yıldırım wrote:

               I think I need to edit the aminoacids.rtp file in
        gromos43a1.ff
               folder as far as I understand from mailing list. I am
        using 43a1
               forcefield. I do not understand what kind of changes
        should I do.


           You do not need to modify the .rtp file, you need to modify your
           coordinate file, as I said before.  The fatal error indicates
        that
           you have included a C atom in an NH2 residue, which is just a
           neutral amine and contains no carbon, as should be clear from the
           .rtp file.

           -Justin

               *the aminoacids.rtp file:*

               [ ACE ]
                [ atoms ]
                  CA   CH3   0.000     0
                   C     C   0.380     1
                   O     O  -0.380     1
                [ bonds ]
                   C    CA   gb_26
                   C     O   gb_4
                   C    +N   gb_9
                [ angles ]
                 CA     C     O    ga_30
                 CA     C    +N    ga_18
                  O     C    +N    ga_32
                [ impropers ]
                  C    CA    +N     O    gi_1

               [ NH2 ]
                [ atoms ]
                   N    NT   -0.83    0
                   H1    H   0.415    0
                   H2    H   0.415   0
                [ bonds ]
                    N    H1  gb_2
                    N    H2  gb_2       -C    N   gb_8
                [ angles ]
                   -O -C N  ga_32
                   -CA -C N ga_18
                   -C N H1  ga_22
                   -C N H2  ga_22
                   H1 N H2  ga_23
                [ dihedrals ]
                  -CA -C N H1 gd_4
                [ impropers ]
                  -C -O N -CA gi_1
                   N  H1 H2  -C gi_1

               [ ALA ]
                [ atoms ]
                  N     N    -0.28000     0
                  H     H     0.28000     0
                 CA   CH1     0.00000     1
                 CB   CH3     0.00000     1
                  C     C       0.380     2
                  O     O      -0.380     2
                [ bonds ]
N H gb_2 N CA gb_20 CA C gb_26
                    C     O    gb_4       C    +N    gb_9      CA    CB
           gb_26          2011/1/21 Justin A. Lemkul <jalem...@vt.edu
        <mailto:jalem...@vt.edu>
               <mailto:jalem...@vt.edu <mailto:jalem...@vt.edu>>
        <mailto:jalem...@vt.edu <mailto:jalem...@vt.edu>

               <mailto:jalem...@vt.edu <mailto:jalem...@vt.edu>>>>




                  ahmet yıldırım wrote:

                      Dear users,

                      Gromacs 4.5.3
                      pdb2gmx -f xxx.pdb -water spc
                      select Force Field:9
                      *Fatal error:*
                      atom C not found in buiding block 13NH2 while
        combining
               tdb and rtp
                      For more information and tips for troubleshooting,
        please
               check
                      the GROMACS
                      website at http://www.gromacs.org/Documentation/Errors


                      How can I fixed this error?


                  You have a carbon atom in a residue that should only
        contain NH2.
                   Refer to the .rtp file for what is expected, then make a
               suitable
                  structure that conforms to those requirements.

                  This has been asked and answered hundreds of times, so
        please
               make
                  use of the mailing list search.  You would have gotten
        your
               answer
                  in minutes rather than hours.

                  -Justin


                      Thanks in advance


                      --         Ahmet YILDIRIM


                  --     ========================================

                  Justin A. Lemkul
                  Ph.D. Candidate
                  ICTAS Doctoral Scholar
                  MILES-IGERT Trainee
                  Department of Biochemistry
                  Virginia Tech
                  Blacksburg, VA
                  jalemkul[at]vt.edu <http://vt.edu> <http://vt.edu>
        <http://vt.edu> | (540)

               231-9080

                  http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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               --         Ahmet YILDIRIM


           --     ========================================

           Justin A. Lemkul
           Ph.D. Candidate
           ICTAS Doctoral Scholar
           MILES-IGERT Trainee
           Department of Biochemistry
           Virginia Tech
           Blacksburg, VA
           jalemkul[at]vt.edu <http://vt.edu> <http://vt.edu> | (540)
        231-9080
           http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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-- Ahmet YILDIRIM


-- ========================================

    Justin A. Lemkul
    Ph.D. Candidate
    ICTAS Doctoral Scholar
    MILES-IGERT Trainee
    Department of Biochemistry
    Virginia Tech
    Blacksburg, VA
    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
    http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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--
Ahmet YILDIRIM

--
========================================

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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