HEADER HYDROLASE/HYDROLASE INHIBITOR 11-DEC-98 2BTC TITLE BOVINE TRYPSIN IN COMPLEX WITH SQUASH SEED INHIBITOR (CUCURBITA PEPO TITLE 2 TRYPSIN INHIBITOR II) COMPND MOL_ID: 2; COMPND 2 MOLECULE: PROTEIN (TRYPSIN INHIBITOR); COMPND 3 CHAIN: I; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.50 ANGSTORMS DBREF 2BTC I 501 529 UNP P10293 ITR3_CUCPE 4 32 SEQRES 1 I 29 ARG VAL CYS PRO LYS ILE LEU MET GLU CYS LYS LYS ASP SEQRES 2 I 29 SER ASP CYS LEU ALA GLU CYS ILE CYS LEU GLU HIS GLY SEQRES 3 I 29 TYR CYS GLY ATOM 1 N ARG I 501 -0.014 18.518 10.663 1.00 17.95 ATOM 2 CA ARG I 501 -0.514 17.177 10.433 1.00 19.67 ATOM 3 C ARG I 501 0.390 16.249 11.214 1.00 17.87 ATOM 4 O ARG I 501 1.590 16.538 11.253 1.00 19.08 ATOM 5 CB ARG I 501 -0.392 16.720 8.975 1.00 21.37 ATOM 6 CG ARG I 501 -1.092 17.565 7.926 1.00 24.81 ATOM 7 CD ARG I 501 -0.200 17.744 6.702 1.00 25.35 ATOM 8 NE ARG I 501 -0.006 16.428 6.207 1.00 26.08 ATOM 9 CZ ARG I 501 1.022 16.006 5.512 1.00 22.98 ATOM 10 NH1 ARG I 501 2.079 16.719 5.117 1.00 21.55 ATOM 11 NH2 ARG I 501 0.983 14.715 5.364 1.00 21.70 ATOM 12 N VAL I 502 -0.087 15.164 11.798 1.00 16.45 ATOM 13 CA VAL I 502 0.787 14.147 12.391 1.00 15.98 ATOM 14 C VAL I 502 1.133 13.121 11.305 1.00 15.24 ATOM 15 O VAL I 502 0.322 12.251 10.954 1.00 16.34 ATOM 16 CB VAL I 502 0.065 13.453 13.587 1.00 17.93 ATOM 17 CG1 VAL I 502 0.880 12.297 14.158 1.00 18.46 ATOM 18 CG2 VAL I 502 -0.215 14.524 14.633 1.00 19.07 ATOM 19 N CYS I 503 2.320 13.212 10.722 1.00 13.49 ATOM 20 CA CYS I 503 2.706 12.276 9.672 1.00 11.89 ATOM 21 C CYS I 503 4.052 11.629 10.051 1.00 11.58 ATOM 22 O CYS I 503 5.114 12.284 10.049 1.00 11.39 ATOM 23 CB CYS I 503 2.782 13.055 8.357 1.00 10.82 ATOM 24 SG CYS I 503 3.382 12.006 7.020 1.00 13.01 ATOM 25 N PRO I 504 4.024 10.343 10.437 1.00 11.20 ATOM 26 CA PRO I 504 5.236 9.571 10.645 1.00 10.17 ATOM 27 C PRO I 504 6.128 9.529 9.407 1.00 9.94 ATOM 28 O PRO I 504 5.676 9.551 8.267 1.00 9.38 ATOM 29 CB PRO I 504 4.752 8.231 11.088 1.00 10.74 ATOM 30 CG PRO I 504 3.345 8.105 10.552 1.00 13.31 ATOM 31 CD PRO I 504 2.814 9.538 10.675 1.00 11.14 ATOM 32 N LYS I 505 7.425 9.438 9.692 1.00 8.70 ATOM 33 CA LYS I 505 8.417 9.509 8.636 1.00 9.45 ATOM 34 C LYS I 505 8.874 8.177 8.066 1.00 9.66 ATOM 35 O LYS I 505 10.093 7.890 7.716 1.00 8.66 ATOM 36 CB LYS I 505 9.595 10.321 9.180 1.00 7.95 ATOM 37 CG LYS I 505 9.215 11.793 9.252 1.00 8.90 ATOM 38 CD LYS I 505 10.179 12.723 9.962 1.00 8.70 ATOM 39 CE LYS I 505 9.657 14.154 9.930 1.00 7.26 ATOM 40 NZ LYS I 505 10.574 15.072 10.595 1.00 9.81 ATOM 41 N ILE I 506 7.925 7.248 7.918 1.00 8.68 ATOM 42 CA ILE I 506 8.188 5.948 7.304 1.00 9.21 ATOM 43 C ILE I 506 8.070 6.087 5.789 1.00 9.60 ATOM 44 O ILE I 506 7.294 6.901 5.272 1.00 11.30 ATOM 45 CB ILE I 506 7.147 4.894 7.885 1.00 10.00 ATOM 46 CG1 ILE I 506 7.414 3.514 7.306 1.00 10.61 ATOM 47 CG2 ILE I 506 5.690 5.360 7.615 1.00 9.99 ATOM 48 CD1 ILE I 506 6.630 2.420 8.041 1.00 11.38 ATOM 49 N LEU I 507 8.875 5.309 5.063 1.00 9.78 ATOM 50 CA LEU I 507 8.780 5.310 3.616 1.00 11.17 ATOM 51 C LEU I 507 7.715 4.274 3.269 1.00 10.96 ATOM 52 O LEU I 507 7.844 3.097 3.608 1.00 10.50 ATOM 53 CB LEU I 507 10.126 4.928 2.968 1.00 12.89 ATOM 54 CG LEU I 507 10.150 5.065 1.433 1.00 15.32 ATOM 55 CD1 LEU I 507 9.847 6.527 1.089 1.00 18.79 ATOM 56 CD2 LEU I 507 11.497 4.666 0.852 1.00 18.06 ATOM 57 N MET I 508 6.665 4.710 2.567 1.00 11.52 ATOM 58 CA MET I 508 5.543 3.842 2.271 1.00 12.77 ATOM 59 C MET I 508 4.978 4.218 0.916 1.00 12.03 ATOM 60 O MET I 508 4.722 5.382 0.653 1.00 12.48 ATOM 61 CB MET I 508 4.498 4.034 3.349 1.00 14.44 ATOM 62 CG MET I 508 3.366 3.061 3.327 1.00 21.13 ATOM 63 SD MET I 508 2.219 3.431 4.677 1.00 26.81 ATOM 64 CE MET I 508 3.282 3.082 6.043 1.00 25.19 ATOM 65 N GLU I 509 4.837 3.263 0.012 1.00 13.28 ATOM 66 CA GLU I 509 4.188 3.495 -1.269 1.00 15.42 ATOM 67 C GLU I 509 2.695 3.678 -1.115 1.00 14.12 ATOM 68 O GLU I 509 2.088 3.119 -0.192 1.00 14.36 ATOM 69 CB GLU I 509 4.396 2.327 -2.202 1.00 18.49 ATOM 70 CG GLU I 509 5.832 2.124 -2.569 1.00 24.32 ATOM 71 CD GLU I 509 5.995 0.943 -3.496 1.00 28.79 ATOM 72 OE1 GLU I 509 5.992 -0.193 -3.013 1.00 31.32 ATOM 73 OE2 GLU I 509 6.109 1.181 -4.699 1.00 32.35 ATOM 74 N CYS I 510 2.062 4.405 -2.032 1.00 13.62 ATOM 75 CA CYS I 510 0.622 4.600 -1.952 1.00 13.31 ATOM 76 C CYS I 510 0.091 4.899 -3.347 1.00 13.92 ATOM 77 O CYS I 510 0.807 5.309 -4.258 1.00 14.05 ATOM 78 CB CYS I 510 0.328 5.772 -0.993 1.00 11.84 ATOM 79 SG CYS I 510 1.145 7.288 -1.540 1.00 11.55 ATOM 80 N LYS I 511 -1.185 4.591 -3.534 1.00 14.99 ATOM 81 CA LYS I 511 -1.912 4.944 -4.746 1.00 16.15 ATOM 82 C LYS I 511 -2.964 5.995 -4.398 1.00 17.28 ATOM 83 O LYS I 511 -3.353 6.799 -5.249 1.00 17.85 ATOM 84 CB LYS I 511 -2.582 3.697 -5.322 1.00 17.85 ATOM 85 CG LYS I 511 -1.547 2.740 -5.925 1.00 19.27 ATOM 86 CD LYS I 511 -2.177 1.556 -6.638 0.00 19.01 ATOM 87 CE LYS I 511 -1.096 0.858 -7.449 0.00 19.00 ATOM 88 NZ LYS I 511 -1.616 -0.344 -8.069 0.00 18.97 ATOM 89 N LYS I 512 -3.430 6.059 -3.148 1.00 16.49 ATOM 90 CA LYS I 512 -4.426 7.042 -2.743 1.00 16.38 ATOM 91 C LYS I 512 -4.100 7.515 -1.339 1.00 15.44 ATOM 92 O LYS I 512 -3.334 6.819 -0.650 1.00 13.05 ATOM 93 CB LYS I 512 -5.821 6.412 -2.793 1.00 19.50 ATOM 94 CG LYS I 512 -5.961 5.187 -1.954 1.00 21.26 ATOM 95 CD LYS I 512 -7.268 4.520 -2.306 1.00 26.28 ATOM 96 CE LYS I 512 -7.232 3.106 -1.719 1.00 29.09 ATOM 97 NZ LYS I 512 -7.073 3.081 -0.262 1.00 32.57 ATOM 98 N ASP I 513 -4.614 8.691 -0.918 1.00 12.85 ATOM 99 CA ASP I 513 -4.351 9.202 0.425 1.00 13.19 ATOM 100 C ASP I 513 -4.697 8.228 1.535 1.00 13.78 ATOM 101 O ASP I 513 -3.928 8.115 2.491 1.00 12.54 ATOM 102 CB ASP I 513 -5.139 10.483 0.731 1.00 14.28 ATOM 103 CG ASP I 513 -4.701 11.718 -0.041 1.00 15.22 ATOM 104 OD1 ASP I 513 -3.564 11.811 -0.486 1.00 13.51 ATOM 105 OD2 ASP I 513 -5.512 12.613 -0.209 1.00 14.73 ATOM 106 N SER I 514 -5.772 7.447 1.374 1.00 14.09 ATOM 107 CA SER I 514 -6.195 6.492 2.398 1.00 16.11 ATOM 108 C SER I 514 -5.223 5.329 2.652 1.00 15.55 ATOM 109 O SER I 514 -5.337 4.615 3.638 1.00 16.47 ATOM 110 CB SER I 514 -7.588 5.968 1.994 1.00 17.59 ATOM 111 OG SER I 514 -7.771 5.989 0.574 1.00 24.95 ATOM 112 N ASP I 515 -4.227 5.127 1.787 1.00 14.86 ATOM 113 CA ASP I 515 -3.191 4.121 1.997 1.00 14.99 ATOM 114 C ASP I 515 -2.142 4.511 3.024 1.00 15.81 ATOM 115 O ASP I 515 -1.376 3.658 3.488 1.00 16.59 ATOM 116 CB ASP I 515 -2.457 3.862 0.707 1.00 15.23 ATOM 117 CG ASP I 515 -3.312 3.237 -0.391 1.00 18.01 ATOM 118 OD1 ASP I 515 -4.323 2.594 -0.100 1.00 19.64 ATOM 119 OD2 ASP I 515 -2.954 3.392 -1.553 1.00 17.53 ATOM 120 N CYS I 516 -2.047 5.805 3.347 1.00 14.46 ATOM 121 CA CYS I 516 -1.011 6.285 4.245 1.00 14.83 ATOM 122 C CYS I 516 -1.412 6.227 5.715 1.00 16.36 ATOM 123 O CYS I 516 -2.576 6.041 6.067 1.00 18.10 ATOM 124 CB CYS I 516 -0.664 7.707 3.833 1.00 12.00 ATOM 125 SG CYS I 516 -0.031 7.768 2.137 1.00 11.29 ATOM 126 N LEU I 517 -0.419 6.290 6.608 1.00 16.57 ATOM 127 CA LEU I 517 -0.676 6.271 8.045 1.00 17.88 ATOM 128 C LEU I 517 -1.030 7.640 8.564 1.00 16.84 ATOM 129 O LEU I 517 -0.525 8.638 8.047 1.00 16.41 ATOM 130 CB LEU I 517 0.523 5.852 8.869 1.00 17.68 ATOM 131 CG LEU I 517 1.147 4.509 8.630 1.00 21.05 ATOM 132 CD1 LEU I 517 2.394 4.382 9.520 1.00 20.59 ATOM 133 CD2 LEU I 517 0.116 3.408 8.890 1.00 21.64 ATOM 134 N ALA I 518 -1.866 7.638 9.607 1.00 17.63 ATOM 135 CA ALA I 518 -2.232 8.823 10.365 1.00 17.23 ATOM 136 C ALA I 518 -2.627 10.007 9.491 1.00 17.84 ATOM 137 O ALA I 518 -3.583 9.855 8.726 1.00 18.16 ATOM 138 CB ALA I 518 -1.050 9.185 11.298 1.00 17.57 ATOM 139 N GLU I 519 -1.966 11.169 9.517 1.00 16.76 ATOM 140 CA GLU I 519 -2.357 12.247 8.659 1.00 17.33 ATOM 141 C GLU I 519 -1.391 12.479 7.494 1.00 16.37 ATOM 142 O GLU I 519 -1.278 13.587 6.953 1.00 16.15 ATOM 143 CB GLU I 519 -2.499 13.493 9.515 1.00 19.70 ATOM 144 CG GLU I 519 -3.556 13.420 10.623 1.00 22.80 ATOM 145 CD GLU I 519 -3.722 14.786 11.283 1.00 26.74 ATOM 146 OE1 GLU I 519 -2.923 15.131 12.146 1.00 27.12 ATOM 147 OE2 GLU I 519 -4.644 15.531 10.935 1.00 31.24 ATOM 148 N CYS I 520 -0.666 11.430 7.099 1.00 15.08 ATOM 149 CA CYS I 520 0.167 11.512 5.923 1.00 14.25 ATOM 150 C CYS I 520 -0.789 11.425 4.740 1.00 13.65 ATOM 151 O CYS I 520 -1.868 10.835 4.853 1.00 14.00 ATOM 152 CB CYS I 520 1.143 10.342 5.829 1.00 12.50 ATOM 153 SG CYS I 520 2.371 10.274 7.164 1.00 12.97 ATOM 154 N ILE I 521 -0.395 12.001 3.610 1.00 13.03 ATOM 155 CA ILE I 521 -1.180 11.901 2.405 1.00 14.34 ATOM 156 C ILE I 521 -0.306 11.302 1.312 1.00 13.21 ATOM 157 O ILE I 521 0.911 11.146 1.466 1.00 12.63 ATOM 158 CB ILE I 521 -1.725 13.315 2.012 1.00 15.45 ATOM 159 CG1 ILE I 521 -0.738 14.449 2.242 1.00 18.24 ATOM 160 CG2 ILE I 521 -2.942 13.577 2.880 1.00 17.49 ATOM 161 CD1 ILE I 521 0.342 14.625 1.197 1.00 20.92 ATOM 162 N CYS I 522 -0.913 10.930 0.198 1.00 11.73 ATOM 163 CA CYS I 522 -0.188 10.283 -0.872 1.00 11.75 ATOM 164 C CYS I 522 0.229 11.291 -1.900 1.00 12.72 ATOM 165 O CYS I 522 -0.594 11.929 -2.543 1.00 13.40 ATOM 166 CB CYS I 522 -1.079 9.217 -1.471 1.00 10.69 ATOM 167 SG CYS I 522 -0.218 8.238 -2.708 1.00 11.65 ATOM 168 N LEU I 523 1.526 11.448 -2.050 1.00 14.91 ATOM 169 CA LEU I 523 2.067 12.410 -2.982 1.00 18.03 ATOM 170 C LEU I 523 2.052 11.870 -4.395 1.00 18.96 ATOM 171 O LEU I 523 1.983 10.673 -4.691 1.00 18.45 ATOM 172 CB LEU I 523 3.500 12.757 -2.573 1.00 20.00 ATOM 173 CG LEU I 523 3.733 13.264 -1.162 1.00 21.62 ATOM 174 CD1 LEU I 523 5.202 13.561 -0.915 0.00 20.88 ATOM 175 CD2 LEU I 523 2.892 14.503 -0.984 1.00 21.91 ATOM 176 N GLU I 524 2.251 12.825 -5.287 1.00 22.00 ATOM 177 CA GLU I 524 2.278 12.616 -6.724 1.00 23.81 ATOM 178 C GLU I 524 3.182 11.477 -7.143 1.00 25.36 ATOM 179 O GLU I 524 2.729 10.619 -7.903 1.00 27.28 ATOM 180 CB GLU I 524 2.720 13.925 -7.390 1.00 24.30 ATOM 181 CG GLU I 524 2.451 13.966 -8.886 0.00 23.70 ATOM 182 CD GLU I 524 2.650 15.342 -9.502 0.00 23.99 ATOM 183 OE1 GLU I 524 3.790 15.717 -9.771 0.00 23.98 ATOM 184 OE2 GLU I 524 1.658 16.036 -9.716 0.00 23.80 ATOM 185 N HIS I 525 4.411 11.328 -6.633 1.00 25.42 ATOM 186 CA HIS I 525 5.228 10.196 -7.077 1.00 26.34 ATOM 187 C HIS I 525 5.006 8.848 -6.385 1.00 24.26 ATOM 188 O HIS I 525 5.871 7.971 -6.448 1.00 24.68 ATOM 189 CB HIS I 525 6.708 10.531 -6.966 1.00 32.16 ATOM 190 CG HIS I 525 7.180 11.412 -8.113 1.00 38.57 ATOM 191 ND1 HIS I 525 7.509 11.092 -9.367 1.00 41.62 ATOM 192 CD2 HIS I 525 7.350 12.773 -7.977 1.00 41.10 ATOM 193 CE1 HIS I 525 7.869 12.193 -9.981 1.00 42.80 ATOM 194 NE2 HIS I 525 7.774 13.201 -9.137 1.00 42.98 ATOM 195 N GLY I 526 3.886 8.655 -5.691 1.00 20.88 ATOM 196 CA GLY I 526 3.525 7.354 -5.163 1.00 18.15 ATOM 197 C GLY I 526 4.047 7.002 -3.791 1.00 15.81 ATOM 198 O GLY I 526 4.102 5.814 -3.444 1.00 15.77 ATOM 199 N TYR I 527 4.432 8.000 -2.993 1.00 14.13 ATOM 200 CA TYR I 527 4.896 7.727 -1.645 1.00 13.74 ATOM 201 C TYR I 527 4.145 8.634 -0.699 1.00 11.43 ATOM 202 O TYR I 527 3.706 9.730 -1.071 1.00 12.21 ATOM 203 CB TYR I 527 6.393 8.014 -1.473 1.00 14.87 ATOM 204 CG TYR I 527 7.260 7.025 -2.204 1.00 17.62 ATOM 205 CD1 TYR I 527 7.465 5.765 -1.644 1.00 18.87 ATOM 206 CD2 TYR I 527 7.826 7.359 -3.434 1.00 19.23 ATOM 207 CE1 TYR I 527 8.243 4.830 -2.312 1.00 21.24 ATOM 208 CE2 TYR I 527 8.618 6.421 -4.104 1.00 21.70 ATOM 209 CZ TYR I 527 8.816 5.162 -3.540 1.00 22.20 ATOM 210 OH TYR I 527 9.616 4.228 -4.156 1.00 25.31 ATOM 211 N CYS I 528 3.930 8.152 0.523 1.00 9.68 ATOM 212 CA CYS I 528 3.304 8.981 1.546 1.00 8.92 ATOM 213 C CYS I 528 4.216 10.100 2.024 1.00 9.23 ATOM 214 O CYS I 528 5.441 9.984 1.964 1.00 10.27 ATOM 215 CB CYS I 528 2.910 8.102 2.722 1.00 10.87 ATOM 216 SG CYS I 528 1.743 6.784 2.268 1.00 11.32 ATOM 217 N GLY I 529 3.659 11.212 2.436 1.00 9.75 ATOM 218 CA GLY I 529 4.435 12.319 2.950 1.00 10.27 ATOM 219 C GLY I 529 3.508 13.334 3.578 1.00 11.77 ATOM 220 O GLY I 529 2.326 13.026 3.775 1.00 12.39 ATOM 221 OXT GLY I 529 3.959 14.443 3.843 1.00 13.12 TER