HEADER HYDROLASE/HYDROLASE INHIBITOR 29-MAY-00 1F2S TITLE CRYSTAL STRUCTURE OF THE COMPLEX FORMED BETWEEN BOVINE BETA-TRYPSIN TITLE 2 AND MCTI-A, A TRYPSIN INHIBITOR OF SQUASH FAMILY AT 1.8 A RESOLUTION COMPND MOL_ID: 2; COMPND 2 MOLECULE: TRYPSIN INHIBITOR A; COMPND 3 CHAIN: I; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.79 ANGSTORMS DBREF 1F2S I 301 328 UNP P10295 ITR2_MOMCH 1 28 SEQRES 1 I 28 ARG ILE CYS PRO ARG ILE TRP MET GLU CYS LYS ARG ASP SEQRES 2 I 28 SER ASP CYS MET ALA GLU CYS ILE CYS VAL MET GLY HIS SEQRES 3 I 28 CYS GLY ATOM 1 N ARG I 301 -0.099 18.501 11.003 1.00 27.30 ATOM 2 CA ARG I 301 -0.731 17.163 11.160 1.00 27.50 ATOM 3 C ARG I 301 0.331 16.168 11.604 1.00 26.47 ATOM 4 O ARG I 301 1.521 16.453 11.512 1.00 27.36 ATOM 5 CB ARG I 301 -1.364 16.720 9.838 1.00 28.08 ATOM 6 CG ARG I 301 -0.393 16.637 8.693 1.00 26.21 ATOM 7 CD ARG I 301 -1.083 16.771 7.342 1.00 26.85 ATOM 8 NE ARG I 301 -0.096 17.102 6.320 1.00 23.38 ATOM 9 CZ ARG I 301 0.702 16.217 5.737 1.00 22.47 ATOM 10 NH1 ARG I 301 0.617 14.932 6.052 1.00 19.68 ATOM 11 NH2 ARG I 301 1.667 16.634 4.927 1.00 25.00 ATOM 12 N ILE I 302 -0.102 15.018 12.106 1.00 25.10 ATOM 13 CA ILE I 302 0.822 13.985 12.554 1.00 22.99 ATOM 14 C ILE I 302 1.108 13.018 11.412 1.00 20.74 ATOM 15 O ILE I 302 0.238 12.240 11.007 1.00 21.91 ATOM 16 CB ILE I 302 0.248 13.167 13.734 1.00 24.96 ATOM 17 CG1 ILE I 302 -0.126 14.091 14.895 1.00 27.54 ATOM 18 CG2 ILE I 302 1.261 12.116 14.188 1.00 22.77 ATOM 19 CD1 ILE I 302 -0.759 13.368 16.080 1.00 28.59 ATOM 20 N CYS I 303 2.320 13.077 10.879 1.00 18.89 ATOM 21 CA CYS I 303 2.696 12.175 9.805 1.00 17.17 ATOM 22 C CYS I 303 4.034 11.500 10.092 1.00 15.96 ATOM 23 O CYS I 303 5.071 12.165 10.116 1.00 14.59 ATOM 24 CB CYS I 303 2.746 12.924 8.475 1.00 18.46 ATOM 25 SG CYS I 303 3.297 11.931 7.051 1.00 16.93 ATOM 26 N PRO I 304 4.011 10.182 10.377 1.00 15.92 ATOM 27 CA PRO I 304 5.190 9.359 10.674 1.00 16.25 ATOM 28 C PRO I 304 6.176 9.448 9.503 1.00 18.01 ATOM 29 O PRO I 304 5.767 9.406 8.333 1.00 17.20 ATOM 30 CB PRO I 304 4.615 7.944 10.760 1.00 15.99 ATOM 31 CG PRO I 304 3.204 8.157 11.164 1.00 18.50 ATOM 32 CD PRO I 304 2.786 9.364 10.378 1.00 17.25 ATOM 33 N ARG I 305 7.470 9.486 9.805 1.00 15.25 ATOM 34 CA ARG I 305 8.470 9.594 8.746 1.00 14.92 ATOM 35 C ARG I 305 8.967 8.276 8.134 1.00 13.21 ATOM 36 O ARG I 305 10.155 8.113 7.836 1.00 13.60 ATOM 37 CB ARG I 305 9.597 10.524 9.203 1.00 13.78 ATOM 38 CG ARG I 305 9.032 11.918 9.435 1.00 16.38 ATOM 39 CD ARG I 305 10.019 12.986 9.821 1.00 15.06 ATOM 40 NE ARG I 305 9.383 14.294 9.670 1.00 13.52 ATOM 41 CZ ARG I 305 9.918 15.447 10.053 1.00 14.60 ATOM 42 NH1 ARG I 305 11.112 15.467 10.627 1.00 17.55 ATOM 43 NH2 ARG I 305 9.269 16.583 9.835 1.00 14.77 ATOM 44 N ILE I 306 8.037 7.348 7.932 1.00 12.33 ATOM 45 CA ILE I 306 8.327 6.035 7.348 1.00 15.18 ATOM 46 C ILE I 306 8.139 6.099 5.821 1.00 16.24 ATOM 47 O ILE I 306 7.246 6.797 5.345 1.00 17.17 ATOM 48 CB ILE I 306 7.384 4.942 7.966 1.00 16.31 ATOM 49 CG1 ILE I 306 7.613 3.575 7.313 1.00 16.81 ATOM 50 CG2 ILE I 306 5.932 5.348 7.823 1.00 15.40 ATOM 51 CD1 ILE I 306 6.848 2.440 7.983 1.00 15.65 ATOM 52 N TRP I 307 9.004 5.426 5.061 1.00 18.00 ATOM 53 CA TRP I 307 8.890 5.415 3.598 1.00 18.66 ATOM 54 C TRP I 307 7.809 4.415 3.204 1.00 17.91 ATOM 55 O TRP I 307 7.917 3.218 3.515 1.00 17.03 ATOM 56 CB TRP I 307 10.211 5.021 2.929 1.00 22.15 ATOM 57 CG TRP I 307 10.174 5.157 1.405 1.00 26.58 ATOM 58 CD1 TRP I 307 10.499 6.269 0.676 1.00 28.74 ATOM 59 CD2 TRP I 307 9.786 4.153 0.445 1.00 25.81 ATOM 60 NE1 TRP I 307 10.339 6.020 -0.669 1.00 29.17 ATOM 61 CE2 TRP I 307 9.905 4.732 -0.838 1.00 27.67 ATOM 62 CE3 TRP I 307 9.352 2.824 0.549 1.00 27.76 ATOM 63 CZ2 TRP I 307 9.609 4.026 -2.015 1.00 27.44 ATOM 64 CZ3 TRP I 307 9.055 2.120 -0.630 1.00 28.00 ATOM 65 CH2 TRP I 307 9.187 2.727 -1.889 1.00 27.25 ATOM 66 N MET I 308 6.802 4.886 2.474 1.00 18.81 ATOM 67 CA MET I 308 5.694 4.024 2.071 1.00 20.96 ATOM 68 C MET I 308 5.072 4.468 0.749 1.00 20.14 ATOM 69 O MET I 308 4.837 5.665 0.531 1.00 20.06 ATOM 70 CB MET I 308 4.632 4.053 3.176 1.00 23.74 ATOM 71 CG MET I 308 3.558 2.989 3.124 1.00 28.48 ATOM 72 SD MET I 308 2.380 3.238 4.500 1.00 35.54 ATOM 73 CE MET I 308 3.482 3.174 5.894 1.00 30.10 ATOM 74 N GLU I 309 4.853 3.510 -0.147 1.00 21.51 ATOM 75 CA GLU I 309 4.215 3.784 -1.435 1.00 22.33 ATOM 76 C GLU I 309 2.704 3.792 -1.236 1.00 20.26 ATOM 77 O GLU I 309 2.187 3.150 -0.317 1.00 19.97 ATOM 78 CB GLU I 309 4.573 2.721 -2.472 1.00 24.12 ATOM 79 CG GLU I 309 5.982 2.828 -2.995 1.00 29.60 ATOM 80 CD GLU I 309 6.230 1.915 -4.173 1.00 33.65 ATOM 81 OE1 GLU I 309 6.619 2.434 -5.242 1.00 36.24 ATOM 82 OE2 GLU I 309 6.040 0.683 -4.032 1.00 34.44 ATOM 83 N CYS I 310 1.994 4.455 -2.139 1.00 18.25 ATOM 84 CA CYS I 310 0.552 4.553 -2.043 1.00 19.12 ATOM 85 C CYS I 310 -0.093 4.896 -3.380 1.00 21.19 ATOM 86 O CYS I 310 0.535 5.494 -4.261 1.00 22.22 ATOM 87 CB CYS I 310 0.184 5.637 -1.027 1.00 16.64 ATOM 88 SG CYS I 310 0.968 7.244 -1.384 1.00 16.87 ATOM 89 N LYS I 311 -1.351 4.490 -3.518 1.00 22.14 ATOM 90 CA LYS I 311 -2.151 4.757 -4.704 1.00 23.81 ATOM 91 C LYS I 311 -3.268 5.742 -4.342 1.00 22.42 ATOM 92 O LYS I 311 -3.779 6.451 -5.205 1.00 22.27 ATOM 93 CB LYS I 311 -2.739 3.455 -5.252 1.00 27.50 ATOM 94 CG LYS I 311 -2.080 2.952 -6.543 1.00 33.23 ATOM 95 CD LYS I 311 -0.571 2.759 -6.406 1.00 36.84 ATOM 96 CE LYS I 311 -0.213 1.574 -5.513 1.00 39.41 ATOM 97 NZ LYS I 311 1.245 1.562 -5.177 1.00 40.45 ATOM 98 N ARG I 312 -3.617 5.800 -3.056 1.00 21.22 ATOM 99 CA ARG I 312 -4.657 6.702 -2.555 1.00 20.99 ATOM 100 C ARG I 312 -4.325 7.176 -1.137 1.00 20.60 ATOM 101 O ARG I 312 -3.549 6.527 -0.425 1.00 18.92 ATOM 102 CB ARG I 312 -6.032 6.019 -2.593 1.00 25.32 ATOM 103 CG ARG I 312 -6.128 4.721 -1.826 1.00 30.21 ATOM 104 CD ARG I 312 -7.006 3.705 -2.556 1.00 35.48 ATOM 105 NE ARG I 312 -8.418 4.088 -2.607 1.00 41.39 ATOM 106 CZ ARG I 312 -9.327 3.525 -3.409 1.00 43.09 ATOM 107 NH1 ARG I 312 -8.977 2.551 -4.245 1.00 43.26 ATOM 108 NH2 ARG I 312 -10.599 3.910 -3.352 1.00 41.13 ATOM 109 N ASP I 313 -4.872 8.328 -0.751 1.00 19.23 ATOM 110 CA ASP I 313 -4.642 8.904 0.577 1.00 18.94 ATOM 111 C ASP I 313 -4.851 7.902 1.708 1.00 19.52 ATOM 112 O ASP I 313 -4.079 7.868 2.661 1.00 19.67 ATOM 113 CB ASP I 313 -5.559 10.107 0.822 1.00 17.62 ATOM 114 CG ASP I 313 -5.096 11.363 0.123 1.00 17.40 ATOM 115 OD1 ASP I 313 -3.928 11.447 -0.302 1.00 19.38 ATOM 116 OD2 ASP I 313 -5.909 12.290 0.005 1.00 18.38 ATOM 117 N SER I 314 -5.871 7.065 1.578 1.00 19.89 ATOM 118 CA SER I 314 -6.199 6.077 2.599 1.00 22.53 ATOM 119 C SER I 314 -5.164 4.981 2.825 1.00 20.65 ATOM 120 O SER I 314 -5.259 4.240 3.797 1.00 22.03 ATOM 121 CB SER I 314 -7.575 5.462 2.315 1.00 25.57 ATOM 122 OG SER I 314 -7.639 4.922 1.005 1.00 27.93 ATOM 123 N ASP I 315 -4.193 4.862 1.925 1.00 20.31 ATOM 124 CA ASP I 315 -3.148 3.851 2.069 1.00 19.12 ATOM 125 C ASP I 315 -2.101 4.255 3.105 1.00 18.25 ATOM 126 O ASP I 315 -1.348 3.414 3.582 1.00 18.23 ATOM 127 CB ASP I 315 -2.411 3.628 0.747 1.00 21.45 ATOM 128 CG ASP I 315 -3.284 3.023 -0.333 1.00 24.88 ATOM 129 OD1 ASP I 315 -4.291 2.354 -0.019 1.00 28.02 ATOM 130 OD2 ASP I 315 -2.939 3.207 -1.513 1.00 25.93 ATOM 131 N CYS I 316 -2.050 5.539 3.434 1.00 16.91 ATOM 132 CA CYS I 316 -1.060 6.061 4.363 1.00 18.85 ATOM 133 C CYS I 316 -1.402 5.949 5.845 1.00 20.22 ATOM 134 O CYS I 316 -2.548 5.683 6.210 1.00 18.95 ATOM 135 CB CYS I 316 -0.744 7.508 3.993 1.00 18.44 ATOM 136 SG CYS I 316 -0.108 7.668 2.292 1.00 18.60 ATOM 137 N MET I 317 -0.384 6.132 6.687 1.00 21.77 ATOM 138 CA MET I 317 -0.532 6.062 8.146 1.00 23.49 ATOM 139 C MET I 317 -0.915 7.391 8.759 1.00 23.21 ATOM 140 O MET I 317 -0.605 8.451 8.210 1.00 20.77 ATOM 141 CB MET I 317 0.772 5.632 8.814 1.00 24.75 ATOM 142 CG MET I 317 1.016 4.156 8.886 1.00 27.85 ATOM 143 SD MET I 317 2.524 3.858 9.834 1.00 30.64 ATOM 144 CE MET I 317 2.900 2.195 9.288 1.00 27.87 ATOM 145 N ALA I 318 -1.507 7.310 9.949 1.00 24.51 ATOM 146 CA ALA I 318 -1.937 8.468 10.724 1.00 25.48 ATOM 147 C ALA I 318 -2.529 9.579 9.853 1.00 24.78 ATOM 148 O ALA I 318 -3.488 9.344 9.116 1.00 24.93 ATOM 149 CB ALA I 318 -0.772 8.994 11.586 1.00 23.13 ATOM 150 N GLU I 319 -1.943 10.772 9.914 1.00 24.16 ATOM 151 CA GLU I 319 -2.427 11.895 9.131 1.00 22.10 ATOM 152 C GLU I 319 -1.563 12.175 7.900 1.00 19.87 ATOM 153 O GLU I 319 -1.551 13.291 7.378 1.00 17.30 ATOM 154 CB GLU I 319 -2.563 13.129 10.025 1.00 25.91 ATOM 155 CG GLU I 319 -3.625 12.948 11.105 1.00 29.06 ATOM 156 CD GLU I 319 -3.599 14.033 12.153 1.00 33.85 ATOM 157 OE1 GLU I 319 -3.517 15.224 11.793 1.00 36.79 ATOM 158 OE2 GLU I 319 -3.665 13.690 13.354 1.00 39.76 ATOM 159 N CYS I 320 -0.826 11.162 7.455 1.00 17.05 ATOM 160 CA CYS I 320 -0.006 11.303 6.266 1.00 17.10 ATOM 161 C CYS I 320 -0.964 11.224 5.084 1.00 18.24 ATOM 162 O CYS I 320 -2.016 10.592 5.178 1.00 19.86 ATOM 163 CB CYS I 320 0.997 10.153 6.135 1.00 17.25 ATOM 164 SG CYS I 320 2.411 10.129 7.281 1.00 17.06 ATOM 165 N ILE I 321 -0.605 11.867 3.983 1.00 17.12 ATOM 166 CA ILE I 321 -1.416 11.834 2.777 1.00 19.25 ATOM 167 C ILE I 321 -0.566 11.274 1.628 1.00 18.58 ATOM 168 O ILE I 321 0.663 11.286 1.694 1.00 16.22 ATOM 169 CB ILE I 321 -1.961 13.238 2.427 1.00 19.94 ATOM 170 CG1 ILE I 321 -0.827 14.261 2.370 1.00 20.91 ATOM 171 CG2 ILE I 321 -3.022 13.653 3.440 1.00 20.26 ATOM 172 CD1 ILE I 321 -1.297 15.670 2.066 1.00 23.26 ATOM 173 N CYS I 322 -1.215 10.726 0.608 1.00 17.06 ATOM 174 CA CYS I 322 -0.499 10.168 -0.528 1.00 15.41 ATOM 175 C CYS I 322 -0.136 11.248 -1.533 1.00 19.75 ATOM 176 O CYS I 322 -0.910 11.542 -2.444 1.00 19.54 ATOM 177 CB CYS I 322 -1.343 9.112 -1.217 1.00 15.04 ATOM 178 SG CYS I 322 -0.409 8.231 -2.493 1.00 16.45 ATOM 179 N VAL I 323 1.041 11.841 -1.373 1.00 23.30 ATOM 180 CA VAL I 323 1.482 12.902 -2.274 1.00 24.73 ATOM 181 C VAL I 323 2.199 12.283 -3.468 1.00 28.31 ATOM 182 O VAL I 323 3.333 11.803 -3.347 1.00 27.15 ATOM 183 CB VAL I 323 2.431 13.892 -1.568 1.00 24.70 ATOM 184 CG1 VAL I 323 2.645 15.121 -2.445 1.00 22.71 ATOM 185 CG2 VAL I 323 1.875 14.274 -0.194 1.00 24.17 ATOM 186 N MET I 324 1.519 12.267 -4.609 1.00 30.78 ATOM 187 CA MET I 324 2.079 11.698 -5.828 1.00 32.85 ATOM 188 C MET I 324 2.746 10.328 -5.648 1.00 29.81 ATOM 189 O MET I 324 3.919 10.151 -5.984 1.00 30.32 ATOM 190 CB MET I 324 3.058 12.681 -6.475 1.00 38.96 ATOM 191 CG MET I 324 2.409 13.624 -7.467 1.00 45.56 ATOM 192 SD MET I 324 1.479 12.700 -8.718 1.00 54.25 ATOM 193 CE MET I 324 2.771 11.602 -9.398 1.00 53.77 ATOM 194 N GLY I 325 2.021 9.385 -5.059 1.00 26.54 ATOM 195 CA GLY I 325 2.555 8.044 -4.887 1.00 23.44 ATOM 196 C GLY I 325 3.407 7.716 -3.675 1.00 20.76 ATOM 197 O GLY I 325 3.856 6.578 -3.532 1.00 20.99 ATOM 198 N HIS I 326 3.673 8.694 -2.821 1.00 21.36 ATOM 199 CA HIS I 326 4.460 8.450 -1.610 1.00 21.27 ATOM 200 C HIS I 326 3.772 9.132 -0.435 1.00 17.75 ATOM 201 O HIS I 326 3.322 10.272 -0.554 1.00 15.06 ATOM 202 CB HIS I 326 5.879 9.008 -1.749 1.00 24.88 ATOM 203 CG HIS I 326 6.626 8.474 -2.931 1.00 29.35 ATOM 204 ND1 HIS I 326 7.049 7.164 -3.016 1.00 29.51 ATOM 205 CD2 HIS I 326 7.023 9.074 -4.079 1.00 28.92 ATOM 206 CE1 HIS I 326 7.675 6.980 -4.164 1.00 29.35 ATOM 207 NE2 HIS I 326 7.674 8.123 -4.827 1.00 31.06 ATOM 208 N CYS I 327 3.669 8.428 0.686 1.00 17.41 ATOM 209 CA CYS I 327 3.040 8.995 1.874 1.00 17.54 ATOM 210 C CYS I 327 3.905 10.130 2.412 1.00 16.21 ATOM 211 O CYS I 327 5.130 10.025 2.414 1.00 17.65 ATOM 212 CB CYS I 327 2.836 7.910 2.930 1.00 17.40 ATOM 213 SG CYS I 327 1.643 6.652 2.385 1.00 19.31 ATOM 214 N GLY I 328 3.277 11.231 2.802 1.00 15.04 ATOM 215 CA GLY I 328 4.026 12.358 3.317 1.00 15.59 ATOM 216 C GLY I 328 3.148 13.436 3.905 1.00 14.81 ATOM 217 O GLY I 328 3.662 14.544 4.158 1.00 16.85 ATOM 218 OXT GLY I 328 1.945 13.182 4.105 1.00 13.62 TER