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Your cif-file contains coordinates, but as far as I could see it does not contain bond lengths, and angles and their deviations. That is what coot complains about. Unless your cif-file describes a modified spermine you could use the spermine already described in the refmac5 library: In coot, go to the "File->Get Monomer" menu and enter the three letter code SPM. It should load a spermine together with geometric restrains (have a look at $CLIB/data/monomers/s/SPM.cif to compare with your cif-file and see that it contains bond length information etc.). Tim -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A On Tue, 22 Jan 2008, Vineet Gaur wrote: > Hi all > I am using COOT for model building and refinement. > i have to introducea ligand in my model > i have downloaded .cif file from RCSB. > However while importing the cif file i m getting the warning message of > having No restraints in the CIF file > > is there any problem in the format of the following cif file > > data_SPM > # > _chem_comp.id SPM > _chem_comp.name SPERMINE > _chem_comp.type NON-POLYMER > _chem_comp.pdbx_type HETAI > _chem_comp.formula "C10 H26 N4" > _chem_comp.mon_nstd_parent_comp_id ? > _chem_comp.pdbx_synonyms ? > _chem_comp.pdbx_formal_charge 0 > _chem_comp.pdbx_initial_date 1999-07-08 > _chem_comp.pdbx_modified_date 2007-08-16 > _chem_comp.pdbx_ambiguous_flag N > _chem_comp.pdbx_release_status REL > _chem_comp.pdbx_replaced_by ? > _chem_comp.pdbx_replaces ? > _chem_comp.formula_weight 202.340 > _chem_comp.one_letter_code ? > _chem_comp.three_letter_code SPM > _chem_comp.pdbx_model_coordinates_details ? > _chem_comp.pdbx_model_coordinates_missing_flag N > _chem_comp.pdbx_ideal_coordinates_details ? > _chem_comp.pdbx_ideal_coordinates_missing_flag N > _chem_comp.pdbx_model_coordinates_db_code 1DPL > _chem_comp.pdbx_processing_site ? > # > loop_ > _chem_comp_atom.comp_id > _chem_comp_atom.atom_id > _chem_comp_atom.alt_atom_id > _chem_comp_atom.type_symbol > _chem_comp_atom.charge > _chem_comp_atom.pdbx_align > _chem_comp_atom.pdbx_aromatic_flag > _chem_comp_atom.pdbx_leaving_atom_flag > _chem_comp_atom.pdbx_stereo_config > _chem_comp_atom.model_Cartn_x > _chem_comp_atom.model_Cartn_y > _chem_comp_atom.model_Cartn_z > _chem_comp_atom.pdbx_model_Cartn_x_ideal > _chem_comp_atom.pdbx_model_Cartn_y_ideal > _chem_comp_atom.pdbx_model_Cartn_z_ideal > _chem_comp_atom.pdbx_ordinal > SPM N1 N1 N 0 1 N N N -1.386 5.560 25.140 -0.292 0.012 7.961 1 > SPM C2 C2 C 0 1 N N N -2.248 4.344 25.282 0.514 -0.023 6.734 2 > SPM C3 C3 C 0 1 N N N -1.844 3.214 24.376 -0.408 0.014 5.515 3 > SPM C4 C4 C 0 1 N N N -2.834 2.063 24.495 0.432 -0.022 4.237 4 > SPM N5 N5 N 0 1 N N N -2.313 0.871 23.720 -0.453 0.013 3.066 5 > SPM C6 C6 C 0 1 N N N -3.235 -0.310 23.760 0.411 -0.024 1.880 6 > SPM C7 C7 C 0 1 N N N -2.669 -1.391 22.871 -0.451 0.011 0.617 7 > SPM C8 C8 C 0 1 N N N -3.306 -2.753 23.219 0.450 -0.028 -0.617 8 > SPM C9 C9 C 0 1 N N N -2.886 -3.777 22.188 -0.412 0.006 -1.880 9 > SPM N10 N10 N 0 1 N N N -3.212 -5.172 22.585 0.453 -0.031 -3.066 10 > SPM C11 C11 C 0 1 N N N -2.084 -5.778 23.391 -0.433 0.005 -4.237 11 > SPM C12 C12 C 0 1 N N N -2.443 -7.162 23.912 0.407 -0.032 -5.515 12 > SPM C13 C13 C 0 1 N N N -1.448 -8.158 23.367 -0.515 0.005 -6.734 13 > SPM N14 N14 N 0 1 N N N -0.553 -8.726 24.427 0.292 -0.029 -7.961 14 > SPM HN11 1HN1 H 0 0 N N N -1.660 6.326 25.754 -0.739 0.916 7.988 15 > SPM HN12 2HN1 H 0 0 N N N -1.355 5.869 24.168 0.354 -0.014 8.735 16 > SPM H21 1H2 H 0 1 N N N -2.281 4.005 26.343 1.181 0.838 6.713 17 > SPM H22 2H2 H 0 1 N N N -3.322 4.602 25.135 1.105 -0.939 6.715 18 > SPM H31 1H3 H 0 1 N N N -1.722 3.550 23.320 -1.074 -0.847 5.536 19 > SPM H32 2H3 H 0 1 N N N -0.796 2.883 24.565 -0.999 0.930 5.534 20 > SPM H41 1H4 H 0 1 N N N -3.061 1.809 25.556 1.098 0.839 4.215 21 > SPM H42 2H4 H 0 1 N N N -3.862 2.355 24.178 1.023 -0.938 4.217 22 > SPM HN5 HN5 H 0 1 N N N -1.378 0.612 24.037 -0.976 -0.849 3.071 23 > SPM H61 1H6 H 0 1 N N N -3.427 -0.667 24.798 1.078 0.838 1.889 24 > SPM H62 2H6 H 0 1 N N N -4.284 -0.042 23.493 1.002 -0.940 1.891 25 > SPM H71 1H7 H 0 1 N N N -2.780 -1.142 21.789 -1.117 -0.851 0.608 26 > SPM H72 2H7 H 0 1 N N N -1.555 -1.427 22.916 -1.042 0.927 0.607 27 > SPM H81 1H8 H 0 1 N N N -3.068 -3.077 24.258 1.117 0.833 -0.608 28 > SPM H82 2H8 H 0 1 N N N -4.414 -2.687 23.323 1.041 -0.944 -0.607 29 > SPM H91 1H9 H 0 1 N N N -3.319 -3.536 21.189 -1.079 -0.855 -1.889 30 > SPM H92 2H9 H 0 1 N N N -1.802 -3.675 21.945 -1.003 0.922 -1.891 31 > SPM HN0 HN0 H 0 1 N N N -3.451 -5.748 21.778 0.976 0.831 -3.071 32 > SPM H111 1H11 H 0 0 N N N -1.133 -5.797 22.808 -1.099 -0.857 -4.215 33 > SPM H112 2H11 H 0 0 N N N -1.767 -5.101 24.219 -1.023 0.921 -4.217 34 > SPM H121 1H12 H 0 0 N N N -2.512 -7.194 25.024 1.074 0.830 -5.536 35 > SPM H122 2H12 H 0 0 N N N -3.497 -7.443 23.683 0.998 -0.948 -5.534 36 > SPM H131 1H13 H 0 0 N N N -1.964 -8.969 22.803 -1.181 -0.856 -6.713 37 > SPM H132 2H13 H 0 0 N N N -0.851 -7.712 22.537 -1.105 0.921 -6.714 38 > SPM HN41 1HN4 H 0 0 N N N 0.119 -9.398 24.058 -0.354 -0.003 -8.735 39 > SPM HN42 2HN4 H 0 0 N N N -1.099 -9.133 25.186 0.814 0.833 -7.990 40 > # > loop_ > _chem_comp_bond.comp_id > _chem_comp_bond.atom_id_1 > _chem_comp_bond.atom_id_2 > _chem_comp_bond.value_order > _chem_comp_bond.pdbx_aromatic_flag > _chem_comp_bond.pdbx_stereo_config > _chem_comp_bond.pdbx_ordinal > SPM N1 C2 SING N N 1 > SPM N1 HN11 SING N N 2 > SPM N1 HN12 SING N N 3 > SPM C2 C3 SING N N 4 > SPM C2 H21 SING N N 5 > SPM C2 H22 SING N N 6 > SPM C3 C4 SING N N 7 > SPM C3 H31 SING N N 8 > SPM C3 H32 SING N N 9 > SPM C4 N5 SING N N 10 > SPM C4 H41 SING N N 11 > SPM C4 H42 SING N N 12 > SPM N5 C6 SING N N 13 > SPM N5 HN5 SING N N 14 > SPM C6 C7 SING N N 15 > SPM C6 H61 SING N N 16 > SPM C6 H62 SING N N 17 > SPM C7 C8 SING N N 18 > SPM C7 H71 SING N N 19 > SPM C7 H72 SING N N 20 > SPM C8 C9 SING N N 21 > SPM C8 H81 SING N N 22 > SPM C8 H82 SING N N 23 > SPM C9 N10 SING N N 24 > SPM C9 H91 SING N N 25 > SPM C9 H92 SING N N 26 > SPM N10 C11 SING N N 27 > SPM N10 HN0 SING N N 28 > SPM C11 C12 SING N N 29 > SPM C11 H111 SING N N 30 > SPM C11 H112 SING N N 31 > SPM C12 C13 SING N N 32 > SPM C12 H121 SING N N 33 > SPM C12 H122 SING N N 34 > SPM C13 N14 SING N N 35 > SPM C13 H131 SING N N 36 > SPM C13 H132 SING N N 37 > SPM N14 HN41 SING N N 38 > SPM N14 HN42 SING N N 39 > # > loop_ > _pdbx_chem_comp_descriptor.comp_id > _pdbx_chem_comp_descriptor.type > _pdbx_chem_comp_descriptor.program > _pdbx_chem_comp_descriptor.program_version > _pdbx_chem_comp_descriptor.descriptor > SPM SMILES ACDLabs 10.04 NCCCNCCCCNCCCN > SPM InChI InChI 1.01 > InChI=1/C10H26N4/c11-5-3-9-13-7-1-2-8-14-10-4-6-12/h13-14H,1-12H2 > SPM SMILES_CANONICAL CACTVS 3.341 NCCCNCCCCNCCCN > SPM SMILES CACTVS 3.341 NCCCNCCCCNCCCN > SPM SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 C(CCNCCCN)CNCCCN > SPM SMILES "OpenEye OEToolkits" 1.5.0 C(CCNCCCN)CNCCCN > # > loop_ > _pdbx_chem_comp_identifier.comp_id > _pdbx_chem_comp_identifier.type > _pdbx_chem_comp_identifier.program > _pdbx_chem_comp_identifier.program_version > _pdbx_chem_comp_identifier.identifier > SPM "SYSTEMATIC NAME" ACDLabs 10.04 > "N,N'-bis(3-aminopropyl)butane-1,4-diamine" > SPM "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.5.0 > "N,N'-bis(3-aminopropyl)butane-1,4-diamine" > # > > thanks > Vineet >