HEADER HYDROLASE/HYDROLASE INHIBITOR 10-DEC-98 2STA TITLE ANIONIC SALMON TRYPSIN IN COMPLEX WITH SQUASH SEED INHIBITOR TITLE 2 (CUCURBITA MAXIMA TRYPSIN INHIBITOR I) COMPND MOL_ID: 2; COMPND 2 MOLECULE: PROTEIN (TRYPSIN INHIBITOR); COMPND 3 CHAIN: I; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.80 ANGSTORMS DBREF 2STA I 501 529 UNP P01074 ITR1_CUCMA 1 29 SEQRES 1 I 29 ARG VAL CYS PRO ARG ILE LEU MET GLU CYS LYS LYS ASP SEQRES 2 I 29 SER ASP CYS LEU ALA GLU CYS VAL CYS LEU GLU HIS GLY SEQRES 3 I 29 TYR CYS GLY ATOM 1 N ARG I 501 15.336 23.046 49.031 1.00 57.89 ATOM 2 CA ARG I 501 16.038 23.346 50.280 1.00 54.90 ATOM 3 C ARG I 501 17.092 24.327 49.751 1.00 51.35 ATOM 4 O ARG I 501 16.542 25.239 49.125 1.00 51.01 ATOM 5 CB ARG I 501 16.644 22.080 50.871 0.00 58.50 ATOM 6 CG ARG I 501 15.671 21.104 51.538 0.00 63.14 ATOM 7 CD ARG I 501 15.007 20.069 50.620 0.00 67.90 ATOM 8 NE ARG I 501 14.036 20.611 49.678 0.00 72.11 ATOM 9 CZ ARG I 501 12.780 20.933 50.014 0.00 74.38 ATOM 10 NH1 ARG I 501 12.310 20.786 51.253 0.00 75.68 ATOM 11 NH2 ARG I 501 11.968 21.411 49.076 0.00 75.59 ATOM 12 N VAL I 502 18.448 24.390 49.865 1.00 44.74 ATOM 13 CA VAL I 502 19.235 25.427 49.146 1.00 38.31 ATOM 14 C VAL I 502 18.955 25.171 47.672 1.00 32.80 ATOM 15 O VAL I 502 19.318 24.101 47.168 1.00 31.30 ATOM 16 CB VAL I 502 20.786 25.331 49.333 1.00 39.01 ATOM 17 CG1 VAL I 502 21.513 26.435 48.544 1.00 36.63 ATOM 18 CG2 VAL I 502 21.120 25.483 50.798 1.00 39.49 ATOM 19 N CYS I 503 18.212 26.067 47.037 1.00 27.17 ATOM 20 CA CYS I 503 17.867 25.820 45.666 1.00 24.06 ATOM 21 C CYS I 503 18.106 27.069 44.815 1.00 19.97 ATOM 22 O CYS I 503 17.488 28.112 45.035 1.00 19.08 ATOM 23 CB CYS I 503 16.406 25.339 45.648 1.00 22.34 ATOM 24 SG CYS I 503 15.874 24.986 43.958 1.00 25.77 ATOM 25 N PRO I 504 19.099 27.059 43.904 1.00 18.53 ATOM 26 CA PRO I 504 19.311 28.149 42.956 1.00 16.51 ATOM 27 C PRO I 504 18.100 28.389 42.053 1.00 14.49 ATOM 28 O PRO I 504 17.403 27.473 41.603 1.00 16.49 ATOM 29 CB PRO I 504 20.567 27.741 42.219 1.00 15.81 ATOM 30 CG PRO I 504 20.623 26.247 42.350 1.00 18.52 ATOM 31 CD PRO I 504 20.121 26.017 43.764 1.00 18.55 ATOM 32 N ARG I 505 17.882 29.650 41.758 1.00 12.78 ATOM 33 CA ARG I 505 16.725 30.021 40.999 1.00 12.72 ATOM 34 C ARG I 505 16.863 29.912 39.475 1.00 13.81 ATOM 35 O ARG I 505 16.311 30.846 38.673 1.00 13.91 ATOM 36 CB ARG I 505 16.371 31.417 41.482 1.00 11.61 ATOM 37 CG ARG I 505 15.727 31.205 42.861 1.00 13.65 ATOM 38 CD ARG I 505 15.502 32.442 43.716 1.00 12.87 ATOM 39 NE ARG I 505 14.839 32.019 44.955 1.00 12.16 ATOM 40 CZ ARG I 505 14.433 32.889 45.876 1.00 11.59 ATOM 41 NH1 ARG I 505 14.639 34.166 45.693 1.00 11.19 ATOM 42 NH2 ARG I 505 13.727 32.508 46.964 1.00 11.79 ATOM 43 N ILE I 506 17.412 28.924 38.978 1.00 14.62 ATOM 44 CA ILE I 506 17.509 28.730 37.535 1.00 16.06 ATOM 45 C ILE I 506 16.294 27.908 37.083 1.00 17.05 ATOM 46 O ILE I 506 15.808 27.082 37.863 1.00 16.63 ATOM 47 CB ILE I 506 18.886 27.980 37.203 1.00 16.22 ATOM 48 CG1 ILE I 506 19.016 27.759 35.695 1.00 17.08 ATOM 49 CG2 ILE I 506 18.971 26.618 37.897 1.00 15.67 ATOM 50 CD1 ILE I 506 20.325 27.098 35.275 1.00 16.74 ATOM 51 N LEU I 507 15.772 28.099 35.864 1.00 18.43 ATOM 52 CA LEU I 507 14.699 27.251 35.324 1.00 19.92 ATOM 53 C LEU I 507 15.342 26.023 34.662 1.00 21.37 ATOM 54 O LEU I 507 16.106 26.139 33.696 1.00 20.33 ATOM 55 CB LEU I 507 13.861 28.009 34.274 1.00 22.15 ATOM 56 CG LEU I 507 12.542 27.335 33.869 1.00 23.62 ATOM 57 CD1 LEU I 507 11.543 27.519 35.014 1.00 25.87 ATOM 58 CD2 LEU I 507 12.005 27.926 32.583 1.00 24.45 ATOM 59 N MET I 508 15.040 24.837 35.163 1.00 23.28 ATOM 60 CA MET I 508 15.686 23.613 34.738 1.00 27.63 ATOM 61 C MET I 508 14.637 22.521 34.706 1.00 30.03 ATOM 62 O MET I 508 13.929 22.286 35.698 1.00 28.76 ATOM 63 CB MET I 508 16.768 23.302 35.753 1.00 30.51 ATOM 64 CG MET I 508 17.725 22.195 35.398 1.00 35.79 ATOM 65 SD MET I 508 19.084 22.053 36.588 1.00 39.18 ATOM 66 CE MET I 508 19.977 23.486 36.089 1.00 35.72 ATOM 67 N GLU I 509 14.472 21.880 33.553 1.00 33.82 ATOM 68 CA GLU I 509 13.526 20.764 33.454 1.00 36.40 ATOM 69 C GLU I 509 14.067 19.539 34.211 1.00 37.51 ATOM 70 O GLU I 509 15.287 19.357 34.317 1.00 38.82 ATOM 71 CB GLU I 509 13.294 20.403 31.987 1.00 36.42 ATOM 72 CG GLU I 509 12.781 21.571 31.155 0.00 38.94 ATOM 73 CD GLU I 509 12.480 21.237 29.704 0.00 39.86 ATOM 74 OE1 GLU I 509 13.289 20.566 29.064 1.00 42.94 ATOM 75 OE2 GLU I 509 11.434 21.659 29.215 0.00 40.40 ATOM 76 N CYS I 510 13.227 18.683 34.785 1.00 38.40 ATOM 77 CA CYS I 510 13.705 17.493 35.469 1.00 39.32 ATOM 78 C CYS I 510 12.642 16.395 35.388 1.00 40.63 ATOM 79 O CYS I 510 11.514 16.619 34.927 1.00 41.25 ATOM 80 CB CYS I 510 13.993 17.827 36.910 1.00 37.90 ATOM 81 SG CYS I 510 12.478 18.515 37.602 1.00 39.23 ATOM 82 N LYS I 511 13.027 15.197 35.824 0.00 42.17 ATOM 83 CA LYS I 511 12.186 14.005 35.853 1.00 43.25 ATOM 84 C LYS I 511 12.293 13.563 37.300 0.00 44.18 ATOM 85 O LYS I 511 11.314 13.422 38.024 0.00 44.13 ATOM 86 CB LYS I 511 12.747 12.921 34.933 0.00 43.32 ATOM 87 CG LYS I 511 12.803 13.303 33.458 0.00 43.71 ATOM 88 CD LYS I 511 13.611 12.313 32.623 0.00 43.91 ATOM 89 CE LYS I 511 15.121 12.568 32.645 0.00 44.11 ATOM 90 NZ LYS I 511 15.728 12.297 33.934 0.00 44.16 ATOM 91 N LYS I 512 13.533 13.356 37.738 1.00 45.48 ATOM 92 CA LYS I 512 13.801 13.003 39.118 1.00 47.31 ATOM 93 C LYS I 512 14.669 14.079 39.771 1.00 47.83 ATOM 94 O LYS I 512 15.240 14.944 39.087 1.00 47.92 ATOM 95 CB LYS I 512 14.501 11.630 39.216 0.00 47.15 ATOM 96 CG LYS I 512 15.928 11.404 38.725 0.00 47.61 ATOM 97 CD LYS I 512 16.057 11.311 37.213 0.00 47.91 ATOM 98 CE LYS I 512 17.432 10.785 36.815 0.00 47.98 ATOM 99 NZ LYS I 512 18.506 11.619 37.323 0.00 48.33 ATOM 100 N ASP I 513 14.762 14.021 41.106 1.00 47.74 ATOM 101 CA ASP I 513 15.475 15.000 41.898 1.00 46.86 ATOM 102 C ASP I 513 16.912 15.172 41.475 1.00 46.41 ATOM 103 O ASP I 513 17.353 16.306 41.319 1.00 46.80 ATOM 104 CB ASP I 513 15.419 14.608 43.373 1.00 47.68 ATOM 105 CG ASP I 513 14.051 14.726 44.056 1.00 50.06 ATOM 106 OD1 ASP I 513 13.060 15.085 43.416 1.00 51.26 ATOM 107 OD2 ASP I 513 13.967 14.457 45.256 1.00 51.01 ATOM 108 N SER I 514 17.602 14.081 41.168 1.00 45.44 ATOM 109 CA SER I 514 19.011 14.099 40.800 1.00 45.54 ATOM 110 C SER I 514 19.373 14.959 39.581 1.00 45.21 ATOM 111 O SER I 514 20.551 15.245 39.351 1.00 46.08 ATOM 112 CB SER I 514 19.456 12.653 40.568 1.00 45.29 ATOM 113 OG SER I 514 18.492 11.718 41.063 1.00 47.69 ATOM 114 N ASP I 515 18.378 15.368 38.777 1.00 44.10 ATOM 115 CA ASP I 515 18.596 16.245 37.636 1.00 42.23 ATOM 116 C ASP I 515 18.798 17.694 38.046 1.00 40.19 ATOM 117 O ASP I 515 19.216 18.507 37.217 1.00 40.53 ATOM 118 CB ASP I 515 17.410 16.240 36.688 1.00 44.33 ATOM 119 CG ASP I 515 17.092 14.896 36.051 1.00 46.44 ATOM 120 OD1 ASP I 515 18.007 14.124 35.733 1.00 46.52 ATOM 121 OD2 ASP I 515 15.906 14.640 35.867 1.00 47.39 ATOM 122 N CYS I 516 18.469 18.003 39.300 1.00 36.90 ATOM 123 CA CYS I 516 18.484 19.368 39.777 1.00 35.64 ATOM 124 C CYS I 516 19.788 19.750 40.461 1.00 35.20 ATOM 125 O CYS I 516 20.588 18.875 40.805 1.00 37.05 ATOM 126 CB CYS I 516 17.311 19.555 40.730 1.00 33.18 ATOM 127 SG CYS I 516 15.707 19.269 39.943 1.00 30.67 ATOM 128 N LEU I 517 20.051 21.046 40.638 1.00 32.78 ATOM 129 CA LEU I 517 21.245 21.484 41.331 1.00 31.23 ATOM 130 C LEU I 517 20.961 21.538 42.830 1.00 32.27 ATOM 131 O LEU I 517 19.802 21.589 43.261 1.00 32.24 ATOM 132 CB LEU I 517 21.662 22.869 40.850 1.00 28.54 ATOM 133 CG LEU I 517 21.874 23.064 39.352 1.00 27.74 ATOM 134 CD1 LEU I 517 22.176 24.513 39.066 1.00 26.73 ATOM 135 CD2 LEU I 517 23.026 22.215 38.871 1.00 29.50 ATOM 136 N ALA I 518 22.057 21.543 43.607 1.00 32.27 ATOM 137 CA ALA I 518 22.091 21.698 45.064 1.00 31.73 ATOM 138 C ALA I 518 21.023 20.910 45.821 1.00 31.67 ATOM 139 O ALA I 518 20.978 19.694 45.637 1.00 31.24 ATOM 140 CB ALA I 518 21.996 23.201 45.390 1.00 28.14 ATOM 141 N GLU I 519 20.167 21.491 46.661 1.00 33.00 ATOM 142 CA GLU I 519 19.117 20.760 47.335 1.00 33.89 ATOM 143 C GLU I 519 17.746 21.096 46.722 1.00 33.48 ATOM 144 O GLU I 519 16.748 21.268 47.440 1.00 32.47 ATOM 145 CB GLU I 519 19.190 21.138 48.797 1.00 37.28 ATOM 146 CG GLU I 519 20.409 20.699 49.632 1.00 43.80 ATOM 147 CD GLU I 519 20.780 21.662 50.777 1.00 47.17 ATOM 148 OE1 GLU I 519 19.907 22.266 51.401 1.00 49.44 ATOM 149 OE2 GLU I 519 21.971 21.845 51.036 1.00 51.19 ATOM 150 N CYS I 520 17.676 21.328 45.403 1.00 33.10 ATOM 151 CA CYS I 520 16.415 21.536 44.691 1.00 31.80 ATOM 152 C CYS I 520 15.790 20.160 44.474 1.00 32.83 ATOM 153 O CYS I 520 16.510 19.155 44.468 1.00 34.30 ATOM 154 CB CYS I 520 16.585 22.115 43.292 1.00 29.86 ATOM 155 SG CYS I 520 17.257 23.783 43.124 1.00 26.06 ATOM 156 N VAL I 521 14.482 20.024 44.288 1.00 32.00 ATOM 157 CA VAL I 521 13.908 18.725 43.981 1.00 32.80 ATOM 158 C VAL I 521 13.134 18.965 42.703 1.00 33.43 ATOM 159 O VAL I 521 12.839 20.106 42.337 1.00 32.09 ATOM 160 CB VAL I 521 12.916 18.176 45.069 1.00 32.55 ATOM 161 CG1 VAL I 521 13.726 17.815 46.288 1.00 33.61 ATOM 162 CG2 VAL I 521 11.843 19.186 45.469 1.00 32.21 ATOM 163 N CYS I 522 12.839 17.885 42.000 1.00 34.24 ATOM 164 CA CYS I 522 12.046 17.969 40.799 1.00 35.87 ATOM 165 C CYS I 522 10.593 18.037 41.219 1.00 37.28 ATOM 166 O CYS I 522 10.049 17.078 41.771 1.00 38.49 ATOM 167 CB CYS I 522 12.289 16.754 39.965 1.00 36.64 ATOM 168 SG CYS I 522 11.473 16.950 38.373 1.00 39.52 ATOM 169 N LEU I 523 9.943 19.177 41.051 1.00 37.67 ATOM 170 CA LEU I 523 8.559 19.311 41.475 1.00 38.54 ATOM 171 C LEU I 523 7.619 18.707 40.435 1.00 39.27 ATOM 172 O LEU I 523 7.915 18.829 39.246 1.00 39.86 ATOM 173 CB LEU I 523 8.258 20.787 41.673 1.00 36.91 ATOM 174 CG LEU I 523 9.236 21.648 42.479 1.00 36.72 ATOM 175 CD1 LEU I 523 8.809 23.095 42.353 1.00 36.70 ATOM 176 CD2 LEU I 523 9.252 21.249 43.949 1.00 37.09 ATOM 177 N GLU I 524 6.453 18.166 40.808 0.00 40.96 ATOM 178 CA GLU I 524 5.464 17.561 39.904 0.00 42.61 ATOM 179 C GLU I 524 5.374 18.136 38.484 0.00 43.22 ATOM 180 O GLU I 524 5.410 17.408 37.498 0.00 43.57 ATOM 181 CB GLU I 524 4.099 17.651 40.586 0.00 42.59 ATOM 182 CG GLU I 524 2.977 16.874 39.902 0.00 42.92 ATOM 183 CD GLU I 524 1.633 17.019 40.597 0.00 43.06 ATOM 184 OE1 GLU I 524 0.890 17.940 40.260 0.00 43.05 ATOM 185 OE2 GLU I 524 1.329 16.208 41.471 0.00 42.99 ATOM 186 N HIS I 525 5.352 19.466 38.356 1.00 45.02 ATOM 187 CA HIS I 525 5.327 20.156 37.059 1.00 44.67 ATOM 188 C HIS I 525 6.516 19.930 36.098 1.00 44.36 ATOM 189 O HIS I 525 6.594 20.647 35.098 1.00 45.37 ATOM 190 CB HIS I 525 5.177 21.678 37.297 0.00 44.88 ATOM 191 CG HIS I 525 6.365 22.433 37.909 0.00 45.21 ATOM 192 ND1 HIS I 525 7.379 21.986 38.651 0.00 45.33 ATOM 193 CD2 HIS I 525 6.536 23.799 37.780 0.00 45.35 ATOM 194 CE1 HIS I 525 8.124 23.019 38.967 0.00 45.49 ATOM 195 NE2 HIS I 525 7.619 24.098 38.446 0.00 45.51 ATOM 196 N GLY I 526 7.487 19.043 36.382 1.00 42.93 ATOM 197 CA GLY I 526 8.634 18.786 35.515 1.00 39.94 ATOM 198 C GLY I 526 9.728 19.839 35.606 1.00 38.14 ATOM 199 O GLY I 526 10.504 19.988 34.669 1.00 38.25 ATOM 200 N TYR I 527 9.856 20.583 36.707 1.00 35.82 ATOM 201 CA TYR I 527 10.906 21.584 36.842 1.00 34.22 ATOM 202 C TYR I 527 11.440 21.579 38.252 1.00 31.90 ATOM 203 O TYR I 527 10.696 21.284 39.201 1.00 31.73 ATOM 204 CB TYR I 527 10.443 22.992 36.609 1.00 36.61 ATOM 205 CG TYR I 527 10.132 23.303 35.179 1.00 40.34 ATOM 206 CD1 TYR I 527 11.180 23.640 34.330 1.00 41.93 ATOM 207 CD2 TYR I 527 8.816 23.251 34.729 1.00 42.47 ATOM 208 CE1 TYR I 527 10.920 23.937 32.999 1.00 44.81 ATOM 209 CE2 TYR I 527 8.547 23.545 33.396 1.00 45.82 ATOM 210 CZ TYR I 527 9.604 23.887 32.541 1.00 46.42 ATOM 211 OH TYR I 527 9.348 24.191 31.217 1.00 49.54 ATOM 212 N CYS I 528 12.698 21.969 38.394 1.00 29.40 ATOM 213 CA CYS I 528 13.346 22.004 39.692 1.00 27.26 ATOM 214 C CYS I 528 12.852 23.160 40.552 1.00 25.78 ATOM 215 O CYS I 528 12.464 24.220 40.029 1.00 25.01 ATOM 216 CB CYS I 528 14.848 22.107 39.476 1.00 27.22 ATOM 217 SG CYS I 528 15.577 20.725 38.550 1.00 27.85 ATOM 218 N GLY I 529 12.804 22.969 41.868 1.00 25.54 ATOM 219 CA GLY I 529 12.421 24.042 42.767 1.00 25.36 ATOM 220 C GLY I 529 12.628 23.675 44.234 1.00 25.33 ATOM 221 O GLY I 529 13.079 22.570 44.547 1.00 24.65 ATOM 222 OXT GLY I 529 12.344 24.515 45.078 1.00 24.67 TER