Re: [AMBER] How to repair defect RNA residues?

From: Jason Swails <jason.swails.gmail.com>
Date: Tue, 22 Nov 2011 06:53:13 -0500

Hello,

Is there any reason you're not just using xleap to add hydrogens instead of chimera? Leap will add hydrogen atoms with the proper names for you.

Alternatively, you can modify the names of the atoms to match the atom names in the library file that's being used (see files in $AMBERHOME/dat/leap/lib and the frcmod file you loaded in $AMBERHOME/dat/leap/cmd for which lib files were loaded).

Also, the default names according to the pdb standard have changed for nucleic acids in the past couple years, so you should make sure you are using a modern NA force field for your system setup and simulations.

HTH,
Jason

--
Jason M. Swails
Quantum Theory Project,
University of Florida
Ph.D. Candidate
352-392-4032
On Nov 21, 2011, at 9:38 PM, "Crystal.CHIA-YU Ku" <crystal.chia.yu.gmail.com> wrote:
> Dear Amber users,
> 
> I have encounter problems about defect residues of my receptor (a RNA
> molecule, riboswitch), and I am looking for any suggestion to repair these
> bad RNA residues.
> 
> Three Uracil and one Cytosine lose their bases in the original receptor
> structure file. I used Chimera to add H, then imported the structure with
> hydrogen information to xleap. Even if xleap added missing atoms to make U
> and C bases to the bad residues, the strange hydrogen, whose symbol is H1'
> ' generated by Chimera, cannot be recognized by xleap and cause failure to
> produce prmtop and inpcrd files. I am wondering if anyone would like to
> share his experience or guidance to handle/repair these defect U and C
> residues. I paste:
> 1. the information of the original versions of defect U and R residues
> 2. the version after add hydrogen by Chimera
> 3. the normal U and C residues
> 4. the error message of xleap related to this defect U and C
> for your reference.
> 
> Thank you so much first for any suggestion.
> 
> Sincerely,
> 
> Crystal
> 
> =============Here is the original version of defect U and
> C===========================
> defect U:
> ATOM    734  P     U A  46       5.536  38.757  55.671  1.00103.94           P
> ATOM    735  OP1   U A  46       5.102  39.580  54.507  1.00102.98           O
> ATOM    736  OP2   U A  46       4.516  38.157  56.585  1.00102.35           O
> ATOM    737  O5'   U A  46       6.481  37.597  55.113  1.00103.26           O
> ATOM    738  C5'   U A  46       7.265  37.796  53.939  1.00103.65           C
> ATOM    739  C4'   U A  46       6.970  36.721  52.916  1.00104.43           C
> ATOM    740  O4'   U A  46       5.555  36.740  52.567  1.00106.62           O
> ATOM    741  C3'   U A  46       7.683  36.914  51.587  1.00103.99           C
> ATOM    742  O3'   U A  46       8.998  36.375  51.647  1.00100.24           O
> ATOM    743  C2'   U A  46       6.781  36.161  50.612  1.00105.37           C
> ATOM    744  O2'   U A  46       6.988  34.758  50.621  1.00106.45           O
> ATOM    745  C1'   U A  46       5.395  36.481  51.178  1.00106.00           C
> 
> defect C:
> ATOM    905  P     C A  55      35.885  38.096  55.085  1.00120.00           P
> ATOM    906  OP1   C A  55      35.675  37.212  53.904  1.00120.00           O
> ATOM    907  OP2   C A  55      36.224  39.531  54.871  1.00119.48           O
> ATOM    908  O5'   C A  55      34.553  38.048  55.970  1.00117.70           O
> ATOM    909  C5'   C A  55      34.468  38.712  57.238  1.00112.73           C
> ATOM    910  C4'   C A  55      33.293  39.681  57.262  1.00109.50           C
> ATOM    911  O4'   C A  55      33.584  40.831  56.420  1.00108.79           O
> ATOM    912  C3'   C A  55      31.957  39.159  56.742  1.00106.73           C
> ATOM    913  O3'   C A  55      31.200  38.443  57.721  1.00100.06           O
> ATOM    914  C2'   C A  55      31.227  40.435  56.334  1.00107.38           C
> ATOM    915  O2'   C A  55      30.532  41.047  57.409  1.00106.32           O
> ATOM    916  C1'   C A  55      32.383  41.311  55.834  1.00107.87           C
> ====================================================================
> ==========the version after add hydrogen by Chimera, which generate weird
> H1' '===============
> defect U:
> ATOM   1104  P   U   A  46       5.536  38.757  55.671  1.00103.94           P
> ATOM   1105  OP1 U   A  46       5.102  39.580  54.507  1.00102.98           O
> ATOM   1106  OP2 U   A  46       4.516  38.157  56.585  1.00102.35           O
> ATOM   1107  O5' U   A  46       6.481  37.597  55.113  1.00103.26           O
> ATOM   1108  C5' U   A  46       7.265  37.796  53.939  1.00103.65           C
> ATOM   1109  C4' U   A  46       6.970  36.721  52.916  1.00104.43           C
> ATOM   1110  O4' U   A  46       5.555  36.740  52.567  1.00106.62           O
> ATOM   1111  C3' U   A  46       7.683  36.914  51.587  1.00103.99           C
> ATOM   1112  O3' U   A  46       8.998  36.375  51.647  1.00100.24           O
> ATOM   1113  C2' U   A  46       6.781  36.161  50.612  1.00105.37           C
> ATOM   1114  O2' U   A  46       6.988  34.758  50.621  1.00106.45           O
> ATOM   1115  C1' U   A  46       5.395  36.481  51.178  1.00106.00           C
> ATOM   1116  H5' U   A  46       8.322  37.759  54.203  1.00  0.00           H
> ATOM   1117 H5'' U   A  46       7.034  38.772  53.513  1.00  0.00           H
> ATOM   1118  H4' U   A  46       7.229  35.746  53.329  1.00  0.00           H
> ATOM   1119  H3' U   A  46       7.720  37.972  51.328  1.00  0.00           H
> ATOM   1120  H2' U   A  46       6.887  36.560  49.603  1.00  0.00           H
> ATOM   1121 HO2' U   A  46       7.858  34.560  50.266  1.00  0.00           H
> ATOM   1122  H1' U   A  46       4.727  35.632  51.031  1.00  0.00           H
> ATOM   1123 H1'' U   A  46       4.987  37.362  50.682  1.00  0.00           H
> 
> defect C:
> ATOM   1367  P   C   A  55      35.885  38.096  55.085  1.00120.00           P
> ATOM   1368  OP1 C   A  55      35.675  37.212  53.904  1.00120.00           O
> ATOM   1369  OP2 C   A  55      36.224  39.531  54.871  1.00119.48           O
> ATOM   1370  O5' C   A  55      34.553  38.048  55.970  1.00117.70           O
> ATOM   1371  C5' C   A  55      34.468  38.712  57.238  1.00112.73           C
> ATOM   1372  C4' C   A  55      33.293  39.681  57.262  1.00109.50           C
> ATOM   1373  O4' C   A  55      33.584  40.831  56.420  1.00108.79           O
> ATOM   1374  C3' C   A  55      31.957  39.159  56.742  1.00106.73           C
> ATOM   1375  O3' C   A  55      31.200  38.443  57.721  1.00100.06           O
> ATOM   1376  C2' C   A  55      31.227  40.435  56.334  1.00107.38           C
> ATOM   1377  O2' C   A  55      30.532  41.047  57.409  1.00106.32           O
> ATOM   1378  C1' C   A  55      32.383  41.311  55.834  1.00107.87           C
> ATOM   1379  H5' C   A  55      34.334  37.968  58.023  1.00  0.00           H
> ATOM   1380 H5'' C   A  55      35.392  39.262  57.418  1.00  0.00           H
> ATOM   1381  H4' C   A  55      33.153  40.029  58.285  1.00  0.00           H
> ATOM   1382  H3' C   A  55      32.120  38.530  55.867  1.00  0.00           H
> ATOM   1383  H2' C   A  55      30.538  40.225  55.516  1.00  0.00           H
> ATOM   1384 HO2' C   A  55      29.818  40.474  57.696  1.00  0.00           H
> ATOM   1385  H1' C   A  55      32.216  42.347  56.129  1.00  0.00           H
> ATOM   1386 H1'' C   A  55      32.452  41.245  54.748  1.00  0.00           H
> ========================================
> ===The normal U and C, without problems in xleap===
> normal U:
> ATOM    359  P   U   A  20      18.791  34.106  68.474  1.00 69.72           P
> ATOM    360  OP1 U   A  20      19.428  34.240  69.815  1.00 67.94           O
> ATOM    361  OP2 U   A  20      18.187  32.810  68.067  1.00 70.75           O
> ATOM    362  O5' U   A  20      17.683  35.246  68.307  1.00 67.65           O
> ATOM    363  C5' U   A  20      18.093  36.593  68.325  1.00 64.78           C
> ATOM    364  C4' U   A  20      16.943  37.551  68.143  1.00 64.09           C
> ATOM    365  O4' U   A  20      16.536  37.558  66.739  1.00 64.68           O
> ATOM    366  C3' U   A  20      15.688  37.146  68.888  1.00 63.48           C
> ATOM    367  O3' U   A  20      15.246  37.686  70.094  1.00 67.10           O
> ATOM    368  C2' U   A  20      14.684  36.585  67.920  1.00 64.08           C
> ATOM    369  O2' U   A  20      13.488  37.305  68.143  1.00 63.57           O
> ATOM    370  C1' U   A  20      15.207  37.089  66.591  1.00 63.02           C
> ATOM    371  N1  U   A  20      15.102  36.075  65.536  1.00 61.23           N
> ATOM    372  C2  U   A  20      14.588  36.494  64.331  1.00 62.06           C
> ATOM    373  O2  U   A  20      14.302  37.658  64.111  1.00 64.97           O
> ATOM    374  N3  U   A  20      14.411  35.508  63.394  1.00 60.85           N
> ATOM    375  C4  U   A  20      14.693  34.182  63.536  1.00 58.57           C
> ATOM    376  O4  U   A  20      14.457  33.425  62.604  1.00 61.36           O
> ATOM    377  C5  U   A  20      15.247  33.818  64.806  1.00 58.86           C
> ATOM    378  C6  U   A  20      15.438  34.759  65.739  1.00 59.39           C
> ATOM    379  H5' U   A  20      18.571  36.800  69.282  1.00  0.00           H
> ATOM    380 H5'' U   A  20      18.817  36.753  67.526  1.00  0.00           H
> ATOM    381  H4' U   A  20      17.245  38.554  68.445  1.00  0.00           H
> ATOM    382  H3' U   A  20      16.054  36.198  69.281  1.00  0.00           H
> ATOM    383  H2' U   A  20      14.570  35.502  67.973  1.00  0.00           H
> ATOM    384 HO2' U   A  20      13.100  37.032  68.978  1.00  0.00           H
> ATOM    385  H1' U   A  20      14.590  37.937  66.295  1.00  0.00           H
> ATOM    386  H3  U   A  20      14.031  35.795  62.503  1.00  0.00           H
> ATOM    387  H5  U   A  20      15.509  32.790  65.010  1.00  0.00           H
> ATOM    388  H6  U   A  20      15.872  34.473  66.686  1.00  0.00           H
> 
> normal C:
> ATOM    192  P   C   A  15      13.292  26.611  45.052  1.00 82.84           P
> ATOM    193  OP1 C   A  15      12.035  25.821  45.182  1.00 83.07           O
> ATOM    194  OP2 C   A  15      13.309  28.039  45.494  1.00 81.33           O
> ATOM    195  O5' C   A  15      14.459  25.821  45.811  1.00 80.70           O
> ATOM    196  C5' C   A  15      14.689  24.434  45.558  1.00 78.27           C
> ATOM    197  C4' C   A  15      16.044  24.011  46.083  1.00 77.99           C
> ATOM    198  O4' C   A  15      17.080  24.778  45.411  1.00 76.87           O
> ATOM    199  C3' C   A  15      16.325  24.253  47.559  1.00 78.96           C
> ATOM    200  O3' C   A  15      15.798  23.232  48.398  1.00 81.22           O
> ATOM    201  C2' C   A  15      17.847  24.243  47.588  1.00 76.78           C
> ATOM    202  O2' C   A  15      18.386  22.940  47.549  1.00 77.07           O
> ATOM    203  C1' C   A  15      18.169  24.998  46.299  1.00 74.72           C
> ATOM    204  N1  C   A  15      18.255  26.436  46.573  1.00 71.17           N
> ATOM    205  C2  C   A  15      19.430  26.945  47.117  1.00 69.58           C
> ATOM    206  O2  C   A  15      20.381  26.180  47.308  1.00 67.81           O
> ATOM    207  N3  C   A  15      19.502  28.255  47.424  1.00 69.23           N
> ATOM    208  C4  C   A  15      18.454  29.048  47.201  1.00 69.43           C
> ATOM    209  N4  C   A  15      18.562  30.338  47.532  1.00 72.18           N
> ATOM    210  C5  C   A  15      17.248  28.557  46.631  1.00 68.13           C
> ATOM    211  C6  C   A  15      17.195  27.259  46.328  1.00 68.61           C
> ATOM    212  H5' C   A  15      13.915  23.847  46.053  1.00  0.00           H
> ATOM    213 H5'' C   A  15      14.647  24.253  44.484  1.00  0.00           H
> ATOM    214  H4' C   A  15      16.192  22.953  45.865  1.00  0.00           H
> ATOM    215  H3' C   A  15      15.945  25.228  47.863  1.00  0.00           H
> ATOM    216  H2' C   A  15      18.219  24.787  48.456  1.00  0.00           H
> ATOM    217 HO2' C   A  15      19.339  22.991  47.449  1.00  0.00           H
> ATOM    218  H1' C   A  15      19.099  24.634  45.863  1.00  0.00           H
> ATOM    219  H41 C   A  15      19.419  30.685  47.937  1.00  0.00           H
> ATOM    220  H42 C   A  15      17.786  30.966  47.377  1.00  0.00           H
> ATOM    221  H5  C   A  15      16.407  29.210  46.450  1.00  0.00           H
> ATOM    222  H6  C   A  15      16.299  26.853  45.882  1.00  0.00           H
> ==================================================
> ===error message of xleap when generate prmtop and inpcrd files===
> Created a new atom named: H1'' within residue: .R<RU 43>
>  Added missing heavy atom: .R<RU 43>.A<N1 13>
>  Added missing heavy atom: .R<RU 43>.A<C6 14>
>  Added missing heavy atom: .R<RU 43>.A<C2 22>
>  Added missing heavy atom: .R<RU 43>.A<C5 16>
>  Added missing heavy atom: .R<RU 43>.A<N3 20>
>  Added missing heavy atom: .R<RU 43>.A<O2 23>
>  Added missing heavy atom: .R<RU 43>.A<C4 18>
>  Added missing heavy atom: .R<RU 43>.A<O4 19>
> 
> Created a new atom named: H1'' within residue: .R<RC 52>
>  Added missing heavy atom: .R<RC 52>.A<N1 13>
>  Added missing heavy atom: .R<RC 52>.A<C6 14>
>  Added missing heavy atom: .R<RC 52>.A<C2 23>
>  Added missing heavy atom: .R<RC 52>.A<C5 16>
>  Added missing heavy atom: .R<RC 52>.A<N3 22>
>  Added missing heavy atom: .R<RC 52>.A<O2 24>
>  Added missing heavy atom: .R<RC 52>.A<C4 18>
>  Added missing heavy atom: .R<RC 52>.A<N4 19>
> 
>> saveamberparm 2hom test.prmtop test.inpcrd
> Checking Unit.
> WARNING: There is a bond of 8.309758 angstroms between:
> -------  .R<RU 25>.A<O3' 30> and .R<RG 26>.A<P 1>
> WARNING: The unperturbed charge of the unit: -77.000000 is not zero.
> FATAL:  Atom .R<RU 43>.A<H1'' 31> does not have a type.
> FATAL:  Atom .R<RU 51>.A<H1'' 31> does not have a type.
> FATAL:  Atom .R<RC 52>.A<H1'' 32> does not have a type.
> FATAL:  Atom .R<RU 76>.A<H1'' 31> does not have a type.
> 
> _______________________________________________
> AMBER mailing list
> AMBER.ambermd.org
> http://lists.ambermd.org/mailman/listinfo/amber
_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Tue Nov 22 2011 - 04:00:06 PST
Custom Search