data_FEC # _chem_comp.id FEC _chem_comp.name "1,3,5,8-TETRAMETHYL-PORPHINE-2,4,6,7-TETRAPROPIONIC ACID FERROUS COMPLEX" _chem_comp.type NON-POLYMER _chem_comp.pdbx_type HETAIN _chem_comp.formula "C36 H36 Fe N4 O8" _chem_comp.mon_nstd_parent_comp_id ? _chem_comp.pdbx_synonyms "FE-COPROPORPHYRIN III" _chem_comp.pdbx_formal_charge ? _chem_comp.pdbx_initial_date 2003-01-31 _chem_comp.pdbx_modified_date 2026-09-16 _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 708.538 _chem_comp.one_letter_code ? _chem_comp.three_letter_code FEC _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag N _chem_comp.pdbx_ideal_coordinates_details MetalCoord _chem_comp.pdbx_ideal_coordinates_missing_flag N _chem_comp.pdbx_model_coordinates_db_code 1NF6 _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site RCSB _chem_comp.pdbx_comp_type "metal-containing ligand" _chem_comp.pdbx_pcm Y # 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.pdbx_backbone_atom_flag _chem_comp_atom.pdbx_n_terminal_atom_flag _chem_comp_atom.pdbx_c_terminal_atom_flag _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_component_atom_id _chem_comp_atom.pdbx_component_comp_id _chem_comp_atom.pdbx_ordinal FEC O1A O1A O -1 1 N N N N N N 28.670 103.449 -29.193 7.909 0.308 1.307 O1A FEC 1 FEC CGA CGA C 0 1 N N N N N N 27.569 102.982 -28.792 7.474 1.471 1.170 CGA FEC 2 FEC O2A O2A O 0 1 N N N N N N 27.291 101.760 -28.660 8.201 2.482 1.071 O2A FEC 3 FEC CBA CBA C 0 1 N N N N N N 26.493 103.975 -28.441 5.962 1.669 1.120 CBA FEC 4 FEC CAA CAA C 0 1 N N N N N N 25.257 103.986 -29.336 5.343 1.478 -0.262 CAA FEC 5 FEC C3A C3A C 0 1 Y N N N N N 24.296 105.192 -29.269 3.847 1.672 -0.301 C3A FEC 6 FEC C2A C2A C 0 1 Y N N N N N 24.170 106.239 -30.084 3.189 2.838 -0.563 C2A FEC 7 FEC C1A C1A C 0 1 Y N N N N N 23.121 107.084 -29.553 1.840 2.575 -0.494 C1A FEC 8 FEC CHA CHA C 0 1 Y N N N N N 22.691 108.277 -30.092 0.779 3.468 -0.686 CHA FEC 9 FEC C4D C4D C 0 1 Y N N N N N 21.627 109.027 -29.642 -0.601 3.252 -0.651 C4D FEC 10 FEC ND ND N 0 1 Y N N N N N 20.922 108.791 -28.476 -1.164 2.041 -0.390 ND FEC 11 FEC C1D C1D C 0 1 Y N N N N N 19.928 109.752 -28.435 -2.514 2.224 -0.439 C1D FEC 12 FEC CHD CHD C 0 1 Y N N N N N 18.994 109.886 -27.431 -3.432 1.192 -0.221 CHD FEC 13 FEC C4C C4C C 0 1 Y N N N N N 18.857 109.030 -26.359 -3.218 -0.161 0.066 C4C FEC 14 FEC C3C C3C C 0 1 Y N N N N N 17.863 109.159 -25.314 -4.170 -1.131 0.267 C3C FEC 15 FEC C2C C2C C 0 1 Y N N N N N 18.049 108.157 -24.446 -3.513 -2.299 0.525 C2C FEC 16 FEC C1C C1C C 0 1 Y N N N N N 19.144 107.357 -24.953 -2.159 -2.024 0.470 C1C FEC 17 FEC CHC CHC C 0 1 Y N N N N N 19.649 106.225 -24.355 -1.107 -2.925 0.659 CHC FEC 18 FEC C4B C4B C 0 1 Y N N N N N 20.673 105.444 -24.836 0.274 -2.706 0.642 C4B FEC 19 FEC C3B C3B C 0 1 N N N N N N 21.169 104.240 -24.202 1.270 -3.640 0.863 C3B FEC 20 FEC C2B C2B C 0 1 N N N N N N 22.158 103.775 -24.968 2.464 -2.990 0.738 C2B FEC 21 FEC C1B C1B C 0 1 Y N N N N N 22.285 104.661 -26.107 2.186 -1.675 0.449 C1B FEC 22 FEC NB NB N 0 1 Y N N N N N 21.365 105.688 -26.010 0.837 -1.494 0.387 NB FEC 23 FEC FE FE FE ? 0 N N R N N N 21.098 107.203 -27.285 -0.164 0.275 -0.001 FE FEC 24 FEC NA NA N -1 1 Y N N N N N 22.617 106.528 -28.391 1.648 1.259 -0.189 NA FEC 25 FEC C4A C4A C 0 1 Y N N N N N 23.328 105.358 -28.203 2.886 0.706 -0.071 C4A FEC 26 FEC CHB CHB C 0 1 Y N N N N N 23.183 104.498 -27.137 3.103 -0.639 0.245 CHB FEC 27 FEC NC NC N -1 1 Y N N N N N 19.628 107.904 -26.131 -1.975 -0.706 0.187 NC FEC 28 FEC CMB CMB C 0 1 N N N N N N 23.043 102.522 -24.779 3.827 -3.615 0.900 CMB FEC 29 FEC CAB CAB C 0 1 N N N N N N 20.641 103.697 -22.855 1.074 -5.102 1.177 CAB FEC 30 FEC CBB CBB C 0 1 N N N N N N 19.779 102.447 -22.874 0.978 -5.998 -0.055 CBB FEC 31 FEC CGB CGB C 0 1 N N N N N N 19.541 101.700 -21.594 0.793 -7.481 0.252 CGB FEC 32 FEC O1B O1B O 0 1 N N N N N N 20.349 101.850 -20.640 -0.363 -7.891 0.487 O1B FEC 33 FEC O2B O2B O -1 1 N N N N N N 18.527 100.947 -21.563 1.808 -8.210 0.253 O2B FEC 34 FEC CAC CAC C 0 1 N N N N N N 17.271 107.897 -23.141 -4.144 -3.639 0.809 CAC FEC 35 FEC CBC CBC C 0 1 N N N N N N 16.837 106.502 -22.737 -4.365 -4.500 -0.432 CBC FEC 36 FEC CGC CGC C 0 1 N N N N N N 16.231 106.327 -21.371 -4.954 -5.879 -0.150 CGC FEC 37 FEC O1C O1C O 0 1 N N N N N N 16.530 107.146 -20.462 -4.171 -6.792 0.188 O1C FEC 38 FEC O2C O2C O -1 1 N N N N N N 15.443 105.352 -21.228 -6.188 -6.026 -0.272 O2C FEC 39 FEC CMC CMC C 0 1 N N N N N N 16.855 110.326 -25.242 -5.668 -0.954 0.228 CMC FEC 40 FEC C2D C2D C 0 1 N N N N N N 20.018 110.595 -29.611 -2.791 3.540 -0.725 C2D FEC 41 FEC C3D C3D C 0 1 N N N N N N 21.038 110.148 -30.344 -1.598 4.186 -0.866 C3D FEC 42 FEC CAD CAD C 0 1 N N N N N N 21.573 110.693 -31.687 -1.402 5.648 -1.182 CAD FEC 43 FEC CBD CBD C 0 1 N N N N N N 20.955 110.126 -32.960 -1.287 6.541 0.050 CBD FEC 44 FEC CGD CGD C 0 1 N N N N N N 20.984 111.020 -34.170 -1.055 8.018 -0.257 CGD FEC 45 FEC O1D O1D O 0 1 N N N N N N 21.397 110.496 -35.233 -2.055 8.740 -0.452 O1D FEC 46 FEC O2D O2D O -1 1 N N N N N N 20.597 112.209 -34.030 0.123 8.430 -0.297 O2D FEC 47 FEC CMD CMD C 0 1 N N N N N N 19.074 111.778 -29.901 -4.155 4.168 -0.875 CMD FEC 48 FEC CMA CMA C 0 1 N N N N N N 24.960 106.562 -31.372 3.853 4.157 -0.869 CMA FEC 49 FEC H1A H1A H 0 1 N N N N N N 28.879 104.370 -29.292 0.124 7.355 0.059 H1A FEC 50 FEC HBA1 1HBA H 0 0 N N N N N N 26.185 103.834 -27.378 5.755 2.578 1.437 HBA1 FEC 51 FEC HBA2 2HBA H 0 0 N N N N N N 26.929 104.999 -28.392 5.542 1.035 1.746 HBA2 FEC 52 FEC HAA1 1HAA H 0 0 N N N N N N 25.578 103.841 -30.393 5.562 0.575 -0.579 HAA1 FEC 53 FEC HAA2 2HAA H 0 0 N N N N N N 24.674 103.052 -29.155 5.777 2.096 -0.889 HAA2 FEC 54 FEC HHA HHA H 0 1 N N N N N N 23.248 108.666 -30.960 1.035 4.364 -0.848 HHA FEC 55 FEC HHD HHD H 0 1 N N N N N N 18.303 110.743 -27.489 -4.341 1.448 -0.276 HHD FEC 56 FEC HHC HHC H 0 1 N N N N N N 19.190 105.914 -23.401 -1.368 -3.822 0.801 HHC FEC 57 FEC HHB HHB H 0 1 N N N N N N 23.836 103.610 -27.105 4.011 -0.878 0.359 HHB FEC 58 FEC HMB1 1HMB H 0 0 N N N N N N 23.869 102.133 -25.419 4.480 -3.133 0.368 HMB1 FEC 59 FEC HMB2 2HMB H 0 0 N N N N N N 23.485 102.627 -23.761 3.809 -4.538 0.600 HMB2 FEC 60 FEC HMB3 3HMB H 0 0 N N N N N N 22.328 101.672 -24.675 4.089 -3.586 1.834 HMB3 FEC 61 FEC HAB1 1HAB H 0 0 N N N N N N 21.501 103.535 -22.164 0.257 -5.215 1.709 HAB1 FEC 62 FEC HAB2 2HAB H 0 0 N N N N N N 20.092 104.509 -22.324 1.811 -5.422 1.741 HAB2 FEC 63 FEC HBB1 1HBB H 0 0 N N N N N N 18.792 102.700 -23.328 1.798 -5.889 -0.591 HBB1 FEC 64 FEC HBB2 2HBB H 0 0 N N N N N N 20.193 101.738 -23.629 0.221 -5.696 -0.609 HBB2 FEC 65 FEC H2B H2B H 0 1 N N N N N N 18.376 100.474 -20.752 8.703 2.401 -0.029 H2B FEC 66 FEC HAC1 1HAC H 0 0 N N N N N N 17.861 108.328 -22.299 -5.007 -3.511 1.260 HAC1 FEC 67 FEC HAC2 2HAC H 0 0 N N N N N N 16.365 108.548 -23.147 -3.580 -4.139 1.439 HAC2 FEC 68 FEC HBC1 1HBC H 0 0 N N N N N N 16.136 106.098 -23.504 -3.504 -4.615 -0.895 HBC1 FEC 69 FEC HBC2 2HBC H 0 0 N N N N N N 17.697 105.802 -22.849 -4.969 -4.021 -1.045 HBC2 FEC 70 FEC H2C H2C H 0 1 N N N N N N 15.060 105.241 -20.365 6.708 -6.360 1.030 H2C FEC 71 FEC HMC1 1HMC H 0 0 N N N N N N 16.089 110.425 -24.437 -6.093 -1.769 -0.085 HMC1 FEC 72 FEC HMC2 2HMC H 0 0 N N N N N N 17.442 111.273 -25.259 -5.903 -0.234 -0.377 HMC2 FEC 73 FEC HMC3 3HMC H 0 0 N N N N N N 16.316 110.359 -26.217 -5.993 -0.745 1.119 HMC3 FEC 74 FEC HAD1 1HAD H 0 0 N N N N N N 21.489 111.804 -31.696 -2.147 5.971 -1.735 HAD1 FEC 75 FEC HAD2 2HAD H 0 0 N N N N N N 22.680 110.568 -31.724 -0.593 5.760 -1.727 HAD2 FEC 76 FEC HBD1 1HBD H 0 0 N N N N N N 21.428 109.146 -33.204 -0.543 6.217 0.608 HBD1 FEC 77 FEC HBD2 2HBD H 0 0 N N N N N N 19.908 109.800 -32.757 -2.113 6.458 0.580 HBD2 FEC 78 FEC H2D H2D H 0 1 N N N N N N 20.615 112.773 -34.793 -9.341 -0.579 -0.272 H2D FEC 79 FEC HMD1 1HMD H 0 0 N N N N N N 19.143 112.426 -30.805 -4.129 5.095 -0.588 HMD1 FEC 80 FEC HMD2 2HMD H 0 0 N N N N N N 18.032 111.381 -29.862 -4.801 3.696 -0.328 HMD2 FEC 81 FEC HMD3 3HMD H 0 0 N N N N N N 19.112 112.451 -29.013 -4.431 4.127 -1.805 HMD3 FEC 82 FEC HMA1 1HMA H 0 0 N N N N N N 24.854 107.437 -32.053 3.212 4.780 -1.242 HMA1 FEC 83 FEC HMA2 2HMA H 0 0 N N N N N N 26.034 106.543 -31.074 4.565 4.026 -1.515 HMA2 FEC 84 FEC HMA3 3HMA H 0 0 N N N N N N 24.849 105.663 -32.022 4.225 4.530 -0.053 HMA3 FEC 85 # 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 _chem_comp_bond.pdbx_metal_coordination_flag _chem_comp_bond.pdbx_metal_pi_flag FEC O1A CGA SING N N 1 N N FEC O1A H1A SING N N 2 N N FEC CGA O2A DOUB N N 3 N N FEC CGA CBA SING N N 4 N N FEC CBA CAA SING N N 5 N N FEC CBA HBA1 SING N N 6 N N FEC CBA HBA2 SING N N 7 N N FEC CAA C3A SING N N 8 N N FEC CAA HAA1 SING N N 9 N N FEC CAA HAA2 SING N N 10 N N FEC C3A C2A DOUB Y N 11 N N FEC C3A C4A SING Y N 12 N N FEC C2A C1A SING Y N 13 N N FEC C2A CMA SING N N 14 N N FEC C1A CHA DOUB Y N 15 N N FEC C1A NA SING Y N 16 N N FEC CHA C4D SING Y N 17 N N FEC CHA HHA SING N N 18 N N FEC C4D ND DOUB Y N 19 N N FEC C4D C3D SING N N 20 N N FEC ND C1D SING Y N 21 N N FEC ND FE SING N N 22 Y N FEC C1D CHD DOUB Y N 23 N N FEC C1D C2D SING N N 24 N N FEC CHD C4C SING Y N 25 N N FEC CHD HHD SING N N 26 N N FEC C4C C3C DOUB Y N 27 N N FEC C4C NC SING Y N 28 N N FEC C3C C2C SING Y N 29 N N FEC C3C CMC SING N N 30 N N FEC C2C C1C DOUB Y N 31 N N FEC C2C CAC SING N N 32 N N FEC C1C CHC SING Y N 33 N N FEC C1C NC SING Y N 34 N N FEC CHC C4B DOUB Y N 35 N N FEC CHC HHC SING N N 36 N N FEC C4B C3B SING N N 37 N N FEC C4B NB SING Y N 38 N N FEC C3B C2B DOUB N N 39 N N FEC C3B CAB SING N N 40 N N FEC C2B C1B SING N N 41 N N FEC C2B CMB SING N N 42 N N FEC C1B NB DOUB Y N 43 N N FEC C1B CHB SING Y N 44 N N FEC NB FE SING N N 45 Y N FEC FE NA SING N N 46 Y N FEC FE NC SING N N 47 Y N FEC NA C4A SING Y N 48 N N FEC C4A CHB DOUB Y N 49 N N FEC CHB HHB SING N N 50 N N FEC CMB HMB1 SING N N 51 N N FEC CMB HMB2 SING N N 52 N N FEC CMB HMB3 SING N N 53 N N FEC CAB CBB SING N N 54 N N FEC CAB HAB1 SING N N 55 N N FEC CAB HAB2 SING N N 56 N N FEC CBB CGB SING N N 57 N N FEC CBB HBB1 SING N N 58 N N FEC CBB HBB2 SING N N 59 N N FEC CGB O1B DOUB N N 60 N N FEC CGB O2B SING N N 61 N N FEC O2B H2B SING N N 62 N N FEC CAC CBC SING N N 63 N N FEC CAC HAC1 SING N N 64 N N FEC CAC HAC2 SING N N 65 N N FEC CBC CGC SING N N 66 N N FEC CBC HBC1 SING N N 67 N N FEC CBC HBC2 SING N N 68 N N FEC CGC O1C DOUB N N 69 N N FEC CGC O2C SING N N 70 N N FEC O2C H2C SING N N 71 N N FEC CMC HMC1 SING N N 72 N N FEC CMC HMC2 SING N N 73 N N FEC CMC HMC3 SING N N 74 N N FEC C2D C3D DOUB N N 75 N N FEC C2D CMD SING N N 76 N N FEC C3D CAD SING N N 77 N N FEC CAD CBD SING N N 78 N N FEC CAD HAD1 SING N N 79 N N FEC CAD HAD2 SING N N 80 N N FEC CBD CGD SING N N 81 N N FEC CBD HBD1 SING N N 82 N N FEC CBD HBD2 SING N N 83 N N FEC CGD O1D DOUB N N 84 N N FEC CGD O2D SING N N 85 N N FEC O2D H2D SING N N 86 N N FEC CMD HMD1 SING N N 87 N N FEC CMD HMD2 SING N N 88 N N FEC CMD HMD3 SING N N 89 N N FEC CMA HMA1 SING N N 90 N N FEC CMA HMA2 SING N N 91 N N FEC CMA HMA3 SING N N 92 N N # 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 FEC SMILES ACDLabs 10.04 "O=C(O)CCC1=C(C7=[N+]3C1=Cc5c(c(c6C=C8[N+]4=C(C=C2C(=C(C(N2[Fe]34n56)=C7)CCC(=O)O)C)C(=C8C)CCC(=O)O)C)CCC(=O)O)C" FEC SMILES_CANONICAL CACTVS 3.341 "Cc1c(CCC(O)=O)c2C=C3C(=C(C)C4=[N+]3[Fe@]56N7C(=CC8=[N+]5C(=Cc1n26)C(=C8CCC(O)=O)C)C(=C(CCC(O)=O)C7=C4)C)CCC(O)=O" FEC SMILES CACTVS 3.341 "Cc1c(CCC(O)=O)c2C=C3C(=C(C)C4=[N+]3[Fe]56N7C(=CC8=[N+]5C(=Cc1n26)C(=C8CCC(O)=O)C)C(=C(CCC(O)=O)C7=C4)C)CCC(O)=O" FEC SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 "Cc1c2cc3[n+]4c(cc5c(c(c6n5[Fe@]47n2c(c1CCC(=O)O)cc8[n+]7c(c6)C(=C8CCC(=O)O)C)CCC(=O)O)C)C(=C3C)CCC(=O)O" FEC SMILES "OpenEye OEToolkits" 1.5.0 "Cc1c2cc3[n+]4c(cc5c(c(c6n5[Fe]47n2c(c1CCC(=O)O)cc8[n+]7c(c6)C(=C8CCC(=O)O)C)CCC(=O)O)C)C(=C3C)CCC(=O)O" FEC InChI InChI 1.03 "InChI=1S/C36H38N4O8.Fe/c1-17-21(5-9-33(41)42)29-14-27-19(3)22(6-10-34(43)44)30(39-27)15-28-20(4)24(8-12-36(47)48)32(40-28)16-31-23(7-11-35(45)46)18(2)26(38-31)13-25(17)37-29;/h13-16H,5-12H2,1-4H3,(H6,37,38,39,40,41,42,43,44,45,46,47,48);/q;+4/p-2/b25-13-,26-13-,27-14-,28-15-,29-14-,30-15-,31-16-,32-16-;" FEC InChIKey InChI 1.03 FEDZMOFKVKOYTI-RGGAHWMASA-L # _pdbx_chem_comp_identifier.comp_id FEC _pdbx_chem_comp_identifier.type "SYSTEMATIC NAME" _pdbx_chem_comp_identifier.program ACDLabs _pdbx_chem_comp_identifier.program_version 10.04 _pdbx_chem_comp_identifier.identifier "[3,3',3'',3'''-(3,8,13,17-tetramethylporphyrin-2,7,12,18-tetrayl-kappa~4~N~21~,N~22~,N~23~,N~24~)tetrapropanoato(2-)]iron(2+)" # _pdbx_chem_comp_synonyms.ordinal 1 _pdbx_chem_comp_synonyms.comp_id FEC _pdbx_chem_comp_synonyms.name "FE-COPROPORPHYRIN III" _pdbx_chem_comp_synonyms.provenance ? _pdbx_chem_comp_synonyms.type ? # loop_ _pdbx_chem_comp_atom_coordination.geometry_id _pdbx_chem_comp_atom_coordination.comp_id _pdbx_chem_comp_atom_coordination.atom_id _pdbx_chem_comp_atom_coordination.number _pdbx_chem_comp_atom_coordination.geometry_calculated _pdbx_chem_comp_atom_coordination.geometry_generic _pdbx_chem_comp_atom_coordination.geometry_abbr _pdbx_chem_comp_atom_coordination.provenance 1 FEC FE 6 octahedral octahedral OCT MetalCoord 1 FEC FE 6 octahedron octahedral OCT FindGeo 2 FEC FE 5 "square pyramid" "square pyramidal" SPY FindGeo 2 FEC FE 5 square-pyramid "square pyramidal" SQP MetalCoord # loop_ _pdbx_chem_comp_atom_coordination_sphere.id _pdbx_chem_comp_atom_coordination_sphere.geometry_id _pdbx_chem_comp_atom_coordination_sphere.comp_id _pdbx_chem_comp_atom_coordination_sphere.atom_id _pdbx_chem_comp_atom_coordination_sphere.descriptor _pdbx_chem_comp_atom_coordination_sphere.provenance 1 1 FEC FE "@OCT{Fe,N,N,N,N,S,S}" MetalCoord 2 1 FEC FE "@OCT{Fe,N,N,N,N,N,O}" MetalCoord 3 2 FEC FE "@SQP{Fe,N,N,N,N,O}" MetalCoord 4 2 FEC FE "@SQP{Fe,N,N,N,N,N}" MetalCoord 5 2 FEC FE "@SQP{Fe,N,N,N,N,C}" MetalCoord # loop_ _pdbx_chem_comp_pcm.pcm_id _pdbx_chem_comp_pcm.comp_id _pdbx_chem_comp_pcm.modified_residue_id _pdbx_chem_comp_pcm.type _pdbx_chem_comp_pcm.category _pdbx_chem_comp_pcm.polypeptide_position _pdbx_chem_comp_pcm.comp_id_linking_atom _pdbx_chem_comp_pcm.modified_residue_id_linking_atom _pdbx_chem_comp_pcm.uniprot_specific_ptm_accession _pdbx_chem_comp_pcm.uniprot_generic_ptm_accession _pdbx_chem_comp_pcm.position 1 FEC GLN None "Metal coordination" "Any position" FE OE1 ? ? "Amino-acid side chain" 2 FEC HIS None "Metal coordination" "Any position" FE NE2 ? ? "Amino-acid side chain" 3 FEC MET None "Metal coordination" "Any position" FE SD ? ? "Amino-acid side chain" 4 FEC TYR None "Metal coordination" "Any position" FE OH ? ? "Amino-acid side chain" # loop_ _pdbx_chem_comp_audit.comp_id _pdbx_chem_comp_audit.action_type _pdbx_chem_comp_audit.date _pdbx_chem_comp_audit.processing_site FEC "Create component" 2003-01-31 RCSB FEC "Modify descriptor" 2011-06-04 RCSB FEC "Modify synonyms" 2020-06-05 PDBE FEC "Other modification" 2026-07-17 RCSB FEC "Other modification" 2026-07-31 RCSB FEC "Other modification" 2026-09-16 RCSB #