HEADER HYDROLASE INHIBITOR 21-MAY-02 1LU0 TITLE Atomic Resolution Structure of Squash Trypsin Inhibitor: Unexpected TITLE 2 Metal Coordination COMPND MOL_ID: 1; COMPND 2 MOLECULE: Trypsin inhibitor I; COMPND 3 CHAIN: A, B; COMPND 4 MUTATION: YES; COMPND 5 ENGINEERED: YES; COMPND 6 MOL_ID: 1; COMPND 7 Trypsin inhibitor I; COMPND 8 CHAIN: A, B; COMPND 9 MUTATION: YES; COMPND 10 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.03 ANGSTORMS DBREF 1LU0 A 1 29 UNP P01074 ITR1_CUCMA 1 29 DBREF 1LU0 B 1 29 UNP P01074 ITR1_CUCMA 1 29 SEQRES 1 B 29 ARG VAL CYS PRO ARG ILE LEU LEU GLU CYS LYS LYS ASP SEQRES 2 B 29 SER ASP CYS LEU ALA GLU CYS VAL CYS LEU GLU HIS GLY SEQRES 3 B 29 TYR CYS GLY ATOM 1 ZN ZN A 201 47.280 58.630 14.066 0.50 8.59 TER ATOM 1 N ARG B 1 49.709 57.968 18.782 1.00 11.51 ATOM 2 CA ARG B 1 50.431 57.478 17.554 1.00 9.92 ATOM 3 C ARG B 1 50.392 55.949 17.606 1.00 10.27 ATOM 4 O ARG B 1 50.640 55.389 18.646 1.00 14.44 ATOM 5 CB ARG B 1 51.851 58.001 17.534 1.00 9.63 ATOM 6 CG ARG B 1 52.630 57.727 16.274 1.00 9.38 ATOM 7 CD ARG B 1 53.987 58.380 16.189 1.00 9.26 ATOM 8 NE ARG B 1 54.922 57.960 17.198 1.00 9.57 ATOM 9 CZ ARG B 1 55.848 57.040 17.052 1.00 9.73 ATOM 10 NH1 ARG B 1 55.997 56.407 15.909 1.00 10.52 ATOM 11 NH2 ARG B 1 56.678 56.754 18.047 1.00 11.94 ATOM 12 N VAL B 2 50.133 55.347 16.503 1.00 9.56 ATOM 13 CA VAL B 2 50.059 53.878 16.389 1.00 10.42 ATOM 14 C VAL B 2 51.320 53.386 15.714 1.00 9.23 ATOM 15 O VAL B 2 51.548 53.563 14.546 1.00 9.70 ATOM 16 CB VAL B 2 48.833 53.436 15.572 1.00 11.92 ATOM 17 CG1 VAL B 2 48.732 51.895 15.488 1.00 15.58 ATOM 18 CG2 VAL B 2 47.518 53.995 16.079 1.00 16.93 ATOM 19 N CYS B 3 52.157 52.701 16.509 1.00 10.16 ATOM 20 CA CYS B 3 53.370 52.050 15.967 1.00 9.93 ATOM 21 C CYS B 3 53.497 50.698 16.611 1.00 10.46 ATOM 22 O CYS B 3 53.929 50.559 17.743 1.00 12.02 ATOM 23 CB CYS B 3 54.558 52.902 16.267 1.00 11.26 ATOM 24 SG CYS B 3 56.120 52.093 15.764 1.00 12.66 ATOM 25 N PRO B 4 53.120 49.642 15.835 1.00 10.71 ATOM 26 CA PRO B 4 53.329 48.268 16.378 1.00 12.87 ATOM 27 C PRO B 4 54.877 48.116 16.570 1.00 12.59 ATOM 28 O PRO B 4 55.630 48.419 15.703 1.00 18.77 ATOM 29 CB PRO B 4 52.791 47.378 15.303 1.00 15.25 ATOM 30 CG PRO B 4 52.555 48.195 14.171 1.00 22.18 ATOM 31 CD PRO B 4 52.596 49.633 14.491 1.00 12.66 ATOM 32 N ARG B 5 55.207 47.453 17.646 1.00 11.46 ATOM 33 CA ARG B 5 56.584 47.283 18.018 1.00 12.47 ATOM 34 C ARG B 5 57.180 46.009 17.376 1.00 10.22 ATOM 35 O ARG B 5 57.743 45.185 18.043 1.00 12.67 ATOM 36 CB ARG B 5 56.773 47.366 19.452 1.00 14.98 ATOM 37 CG ARG B 5 56.572 48.746 19.922 1.00 19.66 ATOM 38 CD ARG B 5 56.920 48.974 21.292 1.00 18.67 ATOM 39 NE ARG B 5 58.272 48.540 21.717 1.00 14.41 ATOM 40 CZ ARG B 5 59.349 49.273 21.665 1.00 14.39 ATOM 41 NH1 ARG B 5 59.276 50.534 21.184 1.00 16.46 ATOM 42 NH2 ARG B 5 60.470 48.771 22.101 1.00 14.04 ATOM 43 N ILE B 6 57.072 45.936 16.104 1.00 11.23 ATOM 44 CA ILE B 6 57.726 44.908 15.290 1.00 11.54 ATOM 45 C ILE B 6 59.063 45.449 14.880 1.00 11.55 ATOM 46 O ILE B 6 59.184 46.545 14.314 1.00 14.43 ATOM 47 CB ILE B 6 56.848 44.509 14.082 1.00 16.17 ATOM 48 CG1 ILE B 6 55.459 44.012 14.560 1.00 19.38 ATOM 49 CG2 ILE B 6 57.645 43.541 13.252 1.00 22.29 ATOM 50 CD1 ILE B 6 55.202 42.616 14.916 1.00 22.82 ATOM 51 N LEU B 7 60.105 44.692 15.124 1.00 10.13 ATOM 52 CA LEU B 7 61.464 45.097 14.820 1.00 10.05 ATOM 53 C LEU B 7 61.649 45.076 13.304 1.00 10.42 ATOM 54 O LEU B 7 61.644 44.023 12.683 1.00 11.98 ATOM 55 CB LEU B 7 62.466 44.198 15.554 1.00 13.50 ATOM 56 CG LEU B 7 63.903 44.761 15.566 1.00 14.71 ATOM 57 CD1 LEU B 7 63.974 46.104 16.257 1.00 17.61 ATOM 58 CD2 LEU B 7 64.813 43.695 16.224 1.00 22.58 ATOM 59 N LEU B 8 61.972 46.258 12.727 1.00 9.60 ATOM 60 CA LEU B 8 62.149 46.408 11.321 1.00 9.70 ATOM 61 C LEU B 8 63.213 47.450 11.048 1.00 9.85 ATOM 62 O LEU B 8 63.198 48.574 11.654 1.00 10.49 ATOM 63 CB LEU B 8 60.871 46.831 10.603 1.00 10.85 ATOM 64 CG LEU B 8 59.788 45.766 10.524 1.00 11.60 ATOM 65 CD1 LEU B 8 58.467 46.349 10.043 1.00 14.08 ATOM 66 CD2 LEU B 8 60.170 44.645 9.552 1.00 14.53 ATOM 67 N GLU B 9 64.164 47.145 10.182 1.00 10.26 ATOM 68 CA GLU B 9 65.140 48.100 9.742 1.00 10.93 ATOM 69 C GLU B 9 64.453 49.076 8.710 1.00 11.16 ATOM 70 O GLU B 9 63.516 48.783 8.050 1.00 12.76 ATOM 71 CB GLU B 9 66.332 47.393 9.056 1.00 13.45 ATOM 72 CG GLU B 9 67.095 46.429 9.913 1.00 15.78 ATOM 73 CD GLU B 9 68.414 46.033 9.322 1.00 22.66 ATOM 74 OE1 GLU B 9 69.268 46.934 9.121 1.00 26.62 ATOM 75 OE2 GLU B 9 68.609 44.864 9.023 1.00 32.98 ATOM 76 N CYS B 10 65.091 50.275 8.625 1.00 11.51 ATOM 77 CA CYS B 10 64.537 51.247 7.746 1.00 12.00 ATOM 78 C CYS B 10 65.599 52.303 7.391 1.00 13.09 ATOM 79 O CYS B 10 66.576 52.518 8.079 1.00 13.78 ATOM 80 CB CYS B 10 63.409 52.015 8.518 1.00 11.25 ATOM 81 SG CYS B 10 63.884 52.780 10.034 1.00 11.90 ATOM 82 N LYS B 11 65.289 52.997 6.267 1.00 13.87 ATOM 83 CA LYS B 11 65.913 54.254 5.914 1.00 14.92 ATOM 84 C LYS B 11 64.966 55.454 5.935 1.00 15.10 ATOM 85 O LYS B 11 65.383 56.559 6.220 1.00 17.78 ATOM 86 CB LYS B 11 66.562 54.170 4.528 1.00 18.10 ATOM 87 CG LYS B 11 67.858 53.379 4.575 1.00 24.39 ATOM 88 CD LYS B 11 68.421 53.320 3.135 1.00 36.72 ATOM 89 CE LYS B 11 69.900 52.906 3.120 1.00 47.72 ATOM 90 NZ LYS B 11 70.633 53.975 2.318 1.00 68.82 ATOM 91 N LYS B 12 63.662 55.215 5.641 1.00 14.13 ATOM 92 CA LYS B 12 62.616 56.211 5.572 1.00 14.29 ATOM 93 C LYS B 12 61.407 55.715 6.319 1.00 12.23 ATOM 94 O LYS B 12 61.226 54.507 6.483 1.00 12.26 ATOM 95 CB LYS B 12 62.241 56.499 4.102 1.00 19.82 ATOM 96 CG LYS B 12 63.312 56.947 3.165 1.00 20.10 ATOM 97 CD LYS B 12 62.949 57.104 1.762 1.00 28.78 ATOM 98 CE LYS B 12 64.232 57.448 0.951 1.00 38.94 ATOM 99 NZ LYS B 12 65.380 56.466 1.072 1.00 55.70 ATOM 100 N ASP B 13 60.557 56.607 6.640 1.00 13.26 ATOM 101 CA ASP B 13 59.287 56.230 7.336 1.00 12.79 ATOM 102 C ASP B 13 58.427 55.247 6.528 1.00 11.28 ATOM 103 O ASP B 13 57.758 54.402 7.060 1.00 11.40 ATOM 104 CB ASP B 13 58.421 57.435 7.692 1.00 13.86 ATOM 105 CG ASP B 13 59.003 58.385 8.708 1.00 16.44 ATOM 106 OD1 ASP B 13 58.314 59.451 8.884 1.00 18.90 ATOM 107 OD2 ASP B 13 60.129 58.135 9.231 1.00 16.07 ATOM 108 N SER B 14 58.515 55.363 5.179 1.00 11.66 ATOM 109 CA SER B 14 57.760 54.463 4.334 1.00 13.64 ATOM 110 C SER B 14 58.209 53.065 4.395 1.00 12.75 ATOM 111 O SER B 14 57.478 52.157 3.905 1.00 14.27 ATOM 112 CB SER B 14 57.722 55.007 2.907 1.00 20.26 ATOM 113 OG SER B 14 59.091 55.230 2.591 1.00 26.95 ATOM 114 N ASP B 15 59.337 52.768 5.001 1.00 11.52 ATOM 115 CA ASP B 15 59.828 51.369 5.278 1.00 11.56 ATOM 116 C ASP B 15 59.170 50.778 6.493 1.00 10.51 ATOM 117 O ASP B 15 59.441 49.635 6.839 1.00 12.35 ATOM 118 CB ASP B 15 61.305 51.397 5.462 1.00 11.91 ATOM 119 CG ASP B 15 62.086 51.887 4.282 1.00 14.53 ATOM 120 OD1 ASP B 15 63.216 52.444 4.444 1.00 14.49 ATOM 121 OD2 ASP B 15 61.666 51.770 3.135 1.00 18.18 ATOM 122 N CYS B 16 58.317 51.543 7.170 1.00 9.82 ATOM 123 CA CYS B 16 57.778 51.166 8.478 1.00 9.41 ATOM 124 C CYS B 16 56.297 50.964 8.392 1.00 9.16 ATOM 125 O CYS B 16 55.603 51.404 7.478 1.00 11.65 ATOM 126 CB CYS B 16 58.127 52.216 9.496 1.00 9.64 ATOM 127 SG CYS B 16 59.898 52.539 9.744 1.00 10.39 ATOM 128 N LEU B 17 55.770 50.269 9.401 1.00 9.19 ATOM 129 CA LEU B 17 54.350 50.003 9.525 1.00 9.12 ATOM 130 C LEU B 17 53.637 51.216 10.131 1.00 8.69 ATOM 131 O LEU B 17 54.180 51.910 10.987 1.00 9.06 ATOM 132 CB LEU B 17 54.146 48.813 10.521 1.00 10.21 ATOM 133 CG LEU B 17 54.655 47.477 10.023 1.00 11.75 ATOM 134 CD1 LEU B 17 54.715 46.455 11.182 1.00 15.17 ATOM 135 CD2 LEU B 17 53.794 46.976 8.876 1.00 14.41 ATOM 136 N ALA B 18 52.346 51.356 9.791 1.00 9.71 ATOM 137 CA ALA B 18 51.443 52.225 10.520 1.00 9.55 ATOM 138 C ALA B 18 52.089 53.634 10.598 1.00 8.73 ATOM 139 O ALA B 18 52.476 54.200 9.594 1.00 10.23 ATOM 140 CB ALA B 18 51.000 51.620 11.805 1.00 10.91 ATOM 141 N GLU B 19 52.104 54.188 11.834 1.00 7.81 ATOM 142 CA GLU B 19 52.664 55.521 12.063 1.00 7.73 ATOM 143 C GLU B 19 54.047 55.420 12.731 1.00 7.90 ATOM 144 O GLU B 19 54.494 56.398 13.351 1.00 8.57 ATOM 145 CB GLU B 19 51.725 56.348 12.917 1.00 8.05 ATOM 146 CG GLU B 19 50.342 56.500 12.297 1.00 8.72 ATOM 147 CD GLU B 19 49.338 57.139 13.186 1.00 8.76 ATOM 148 OE1 GLU B 19 49.490 57.104 14.427 1.00 8.83 ATOM 149 OE2 GLU B 19 48.318 57.664 12.649 1.00 9.17 ATOM 150 N CYS B 20 54.733 54.294 12.566 1.00 7.78 ATOM 151 CA CYS B 20 56.104 54.219 12.975 1.00 7.90 ATOM 152 C CYS B 20 56.929 55.123 12.100 1.00 8.26 ATOM 153 O CYS B 20 56.653 55.370 10.947 1.00 9.53 ATOM 154 CB CYS B 20 56.619 52.795 12.869 1.00 9.00 ATOM 155 SG CYS B 20 55.794 51.542 13.860 1.00 10.25 ATOM 156 N VAL B 21 58.032 55.623 12.719 1.00 8.77 ATOM 157 CA VAL B 21 58.965 56.532 12.057 1.00 10.34 ATOM 158 C VAL B 21 60.333 55.855 12.037 1.00 9.86 ATOM 159 O VAL B 21 60.692 55.061 12.899 1.00 10.39 ATOM 160 CB VAL B 21 59.032 57.831 12.920 0.71 13.26 ATOM 161 CG1 VAL B 21 60.093 58.814 12.505 0.71 12.97 ATOM 162 CG2 VAL B 21 57.676 58.501 12.817 0.71 18.45 ATOM 163 N CYS B 22 61.109 56.186 11.028 1.00 10.47 ATOM 164 CA CYS B 22 62.455 55.646 10.965 1.00 11.26 ATOM 165 C CYS B 22 63.399 56.473 11.803 1.00 12.80 ATOM 166 O CYS B 22 63.643 57.630 11.559 1.00 14.81 ATOM 167 CB CYS B 22 62.928 55.562 9.531 1.00 12.54 ATOM 168 SG CYS B 22 64.510 54.633 9.420 1.00 13.26 ATOM 169 N LEU B 23 63.889 55.890 12.881 1.00 12.32 ATOM 170 CA LEU B 23 64.690 56.533 13.888 1.00 13.43 ATOM 171 C LEU B 23 66.179 56.396 13.534 1.00 14.55 ATOM 172 O LEU B 23 66.592 55.694 12.631 1.00 17.00 ATOM 173 CB LEU B 23 64.355 56.076 15.275 1.00 15.39 ATOM 174 CG LEU B 23 62.885 56.243 15.729 1.00 20.14 ATOM 175 CD1 LEU B 23 62.647 55.591 17.095 1.00 30.09 ATOM 176 CD2 LEU B 23 62.527 57.696 15.746 1.00 29.01 ATOM 177 N GLU B 24 67.015 57.074 14.289 1.00 17.11 ATOM 178 CA GLU B 24 68.397 57.250 13.937 1.00 19.40 ATOM 179 C GLU B 24 69.250 55.994 14.161 1.00 18.54 ATOM 180 O GLU B 24 70.360 55.970 13.601 1.00 25.70 ATOM 181 CB GLU B 24 69.031 58.380 14.767 1.00 24.90 ATOM 182 CG GLU B 24 68.403 59.672 14.379 1.00 27.60 ATOM 183 CD GLU B 24 67.121 59.910 15.161 1.00 25.82 ATOM 184 OE1 GLU B 24 66.677 61.046 14.850 1.00 29.93 ATOM 185 OE2 GLU B 24 66.544 59.109 15.978 1.00 23.67 ATOM 186 N HIS B 25 68.768 54.961 14.835 1.00 17.55 ATOM 187 CA HIS B 25 69.482 53.748 14.915 1.00 18.94 ATOM 188 C HIS B 25 69.213 52.764 13.780 1.00 15.97 ATOM 189 O HIS B 25 69.672 51.626 13.823 1.00 18.94 ATOM 190 CB HIS B 25 69.225 53.190 16.281 1.00 20.01 ATOM 191 CG HIS B 25 67.809 53.063 16.635 1.00 21.79 ATOM 192 ND1 HIS B 25 66.759 52.773 15.799 1.00 22.12 ATOM 193 CD2 HIS B 25 67.266 53.355 17.883 1.00 26.74 ATOM 194 CE1 HIS B 25 65.662 52.785 16.494 1.00 21.58 ATOM 195 NE2 HIS B 25 65.922 53.142 17.732 1.00 25.54 ATOM 196 N GLY B 26 68.423 53.231 12.813 1.00 15.82 ATOM 197 CA GLY B 26 68.118 52.417 11.663 1.00 16.11 ATOM 198 C GLY B 26 67.003 51.453 11.830 1.00 12.94 ATOM 199 O GLY B 26 66.857 50.557 10.993 1.00 12.67 ATOM 200 N TYR B 27 66.178 51.632 12.896 1.00 12.27 ATOM 201 CA TYR B 27 64.986 50.811 13.080 0.54 10.42 ATOM 202 C TYR B 27 63.788 51.728 13.220 1.00 9.82 ATOM 203 O TYR B 27 63.858 52.903 13.628 1.00 10.66 ATOM 204 CB TYR B 27 65.058 49.902 14.315 0.54 11.51 ATOM 205 CG TYR B 27 66.020 48.775 13.991 0.54 13.64 ATOM 206 CD1 TYR B 27 65.523 47.581 13.501 0.54 14.13 ATOM 207 CD2 TYR B 27 67.358 48.884 14.161 0.54 14.45 ATOM 208 CE1 TYR B 27 66.319 46.502 13.167 0.54 16.16 ATOM 209 CE2 TYR B 27 68.197 47.826 13.832 0.54 16.81 ATOM 210 CZ TYR B 27 67.658 46.657 13.335 0.54 16.87 ATOM 211 OH TYR B 27 68.478 45.563 13.031 0.54 21.29 ATOM 212 N CYS B 28 62.620 51.170 12.869 1.00 9.50 ATOM 213 CA CYS B 28 61.373 51.820 13.060 1.00 9.08 ATOM 214 C CYS B 28 61.029 51.961 14.514 1.00 9.15 ATOM 215 O CYS B 28 61.306 51.085 15.331 1.00 10.70 ATOM 216 CB CYS B 28 60.266 51.023 12.357 1.00 8.60 ATOM 217 SG CYS B 28 60.542 50.762 10.575 1.00 9.74 ATOM 218 N GLY B 29 60.304 53.067 14.903 1.00 9.37 ATOM 219 CA GLY B 29 59.853 53.235 16.232 1.00 10.64 ATOM 220 C GLY B 29 58.832 54.288 16.412 1.00 11.50 ATOM 221 O GLY B 29 58.395 54.913 15.422 1.00 10.85 ATOM 222 OXT GLY B 29 58.500 54.538 17.598 1.00 15.74 ATOM 223 S SO4 B 205 47.280 58.630 9.184 0.16 13.47 ATOM 224 O1 SO4 B 205 48.286 57.858 9.977 0.32 17.85 ATOM 225 O2 SO4 B 205 46.512 57.678 8.297 0.32 19.82 ATOM 226 C1 MRD B 204 64.307 47.999 20.401 0.50 25.05 ATOM 227 C2 MRD B 204 63.626 49.033 19.481 0.50 18.97 ATOM 228 O2 MRD B 204 63.097 50.044 20.303 0.50 29.25 ATOM 229 CM MRD B 204 64.606 49.512 18.448 0.50 26.09 ATOM 230 C3 MRD B 204 62.372 48.368 18.937 0.50 18.36 ATOM 231 C4 MRD B 204 61.685 49.154 17.885 0.50 17.90 ATOM 232 O4 MRD B 204 61.592 50.569 18.070 0.50 15.45 ATOM 233 C5 MRD B 204 60.305 48.503 17.695 0.50 20.12 ATOM 234 C1 GOL B 203 68.500 48.541 5.056 0.45 27.27 ATOM 235 O1 GOL B 203 69.141 49.315 4.011 0.45 31.36 ATOM 236 C2 GOL B 203 67.082 48.194 4.682 0.45 23.92 ATOM 237 O2 GOL B 203 67.044 47.557 3.384 0.45 45.11 ATOM 238 C3 GOL B 203 66.210 49.406 4.638 0.45 17.70 ATOM 239 O3 GOL B 203 64.825 49.065 4.634 0.45 18.97 TER