HEADER PROTEASE INHIBITOR 14-SEP-04 1W7Z TITLE CRYSTAL STRUCTURE OF THE FREE (UNCOMPLEXED) ECBALLIUM ELATERIUM TITLE 2 TRYPSIN INHIBITOR (EETI-II) COMPND MOL_ID: 1; COMPND 2 MOLECULE: TRYPSIN INHIBITOR II; COMPND 3 CHAIN: A, B, C, D, E, F, G, H; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.67 ANGSTORMS DBREF 1W7Z A 1 31 UNP P12071 ITR2_ECBEL 1 31 SEQRES 1 A 28 GLY CYS PRO ARG ILE LEU ILE ARG CYS LYS GLN ASP SER SEQRES 2 A 28 ASP CYS LEU ALA GLY CYS VAL CYS GLY PRO ASN GLY PHE SEQRES 3 A 28 CYS GLY ATOM 1 N GLY A 1 32.447 3.770 15.180 1.00 41.43 ATOM 2 CA GLY A 1 32.042 5.059 14.583 1.00 40.62 ATOM 3 C GLY A 1 30.993 4.946 13.485 1.00 39.23 ATOM 4 O GLY A 1 30.450 5.968 13.056 1.00 41.45 ATOM 5 N CYS A 2 30.694 3.731 13.019 1.00 36.30 ATOM 6 CA CYS A 2 29.672 3.578 11.991 1.00 33.16 ATOM 7 C CYS A 2 28.275 3.479 12.653 1.00 30.74 ATOM 8 O CYS A 2 28.087 2.713 13.560 1.00 32.04 ATOM 9 CB CYS A 2 29.955 2.340 11.139 1.00 32.37 ATOM 10 SG CYS A 2 28.883 2.187 9.704 1.00 33.11 ATOM 11 N PRO A 3 27.291 4.258 12.192 1.00 28.28 ATOM 12 CA PRO A 3 25.899 4.057 12.668 1.00 26.55 ATOM 13 C PRO A 3 25.420 2.638 12.478 1.00 25.35 ATOM 14 O PRO A 3 25.843 1.981 11.542 1.00 26.10 ATOM 15 CB PRO A 3 25.096 4.997 11.810 1.00 26.94 ATOM 16 CG PRO A 3 26.099 6.044 11.357 1.00 28.50 ATOM 17 CD PRO A 3 27.389 5.345 11.238 1.00 28.49 ATOM 18 N ARG A 4 24.538 2.148 13.335 1.00 23.24 ATOM 19 CA ARG A 4 24.106 0.725 13.266 1.00 24.15 ATOM 20 C ARG A 4 22.801 0.511 12.491 1.00 22.65 ATOM 21 O ARG A 4 22.116 -0.503 12.665 1.00 22.79 ATOM 22 CB ARG A 4 24.052 0.152 14.682 1.00 26.70 ATOM 23 CG ARG A 4 25.494 0.043 15.266 1.00 30.56 ATOM 24 CD ARG A 4 25.585 -0.828 16.506 1.00 39.62 ATOM 25 NE ARG A 4 25.742 -2.270 16.223 1.00 44.58 ATOM 26 CZ ARG A 4 25.325 -3.251 17.045 1.00 48.72 ATOM 27 NH1 ARG A 4 24.687 -2.994 18.195 1.00 48.92 ATOM 28 NH2 ARG A 4 25.514 -4.517 16.707 1.00 50.43 ATOM 29 N ILE A 5 22.477 1.469 11.630 1.00 21.21 ATOM 30 CA ILE A 5 21.384 1.348 10.654 1.00 20.96 ATOM 31 C ILE A 5 21.885 0.400 9.611 1.00 21.23 ATOM 32 O ILE A 5 23.021 0.536 9.147 1.00 21.14 ATOM 33 CB ILE A 5 21.064 2.685 10.005 1.00 20.19 ATOM 34 CG1 ILE A 5 20.557 3.673 11.092 1.00 20.89 ATOM 35 CG2 ILE A 5 20.069 2.545 8.831 1.00 21.32 ATOM 36 CD1 ILE A 5 20.708 5.129 10.656 1.00 24.31 ATOM 37 N LEU A 6 21.059 -0.583 9.260 1.00 20.22 ATOM 38 CA LEU A 6 21.446 -1.539 8.217 1.00 19.93 ATOM 39 C LEU A 6 21.251 -0.948 6.816 1.00 18.74 ATOM 40 O LEU A 6 20.149 -0.589 6.396 1.00 19.00 ATOM 41 CB LEU A 6 20.744 -2.892 8.316 1.00 22.56 ATOM 42 CG LEU A 6 21.065 -3.833 9.470 1.00 24.94 ATOM 43 CD1 LEU A 6 20.487 -5.228 9.149 1.00 27.44 ATOM 44 CD2 LEU A 6 22.559 -3.917 9.766 1.00 29.99 ATOM 45 N ILE A 7 22.354 -0.845 6.102 1.00 18.37 ATOM 46 CA ILE A 7 22.379 -0.258 4.775 1.00 17.36 ATOM 47 C ILE A 7 23.193 -1.200 3.865 1.00 19.28 ATOM 48 O ILE A 7 24.313 -1.556 4.199 1.00 20.10 ATOM 49 CB ILE A 7 23.009 1.153 4.815 1.00 17.55 ATOM 50 CG1 ILE A 7 22.304 2.065 5.833 1.00 19.32 ATOM 51 CG2 ILE A 7 23.062 1.710 3.420 1.00 18.68 ATOM 52 CD1 ILE A 7 22.860 3.490 5.843 1.00 20.37 ATOM 53 N ARG A 8 22.608 -1.602 2.750 1.00 19.76 ATOM 54 CA ARG A 8 23.301 -2.475 1.840 1.00 21.44 ATOM 55 C ARG A 8 24.185 -1.635 0.896 0.50 21.45 ATOM 56 O ARG A 8 23.946 -0.431 0.706 1.00 20.43 ATOM 57 CB ARG A 8 22.245 -3.291 1.055 1.00 24.06 ATOM 58 CG ARG A 8 21.786 -4.477 1.867 0.50 26.51 ATOM 59 CD ARG A 8 20.835 -5.405 1.158 0.50 30.67 ATOM 60 NE ARG A 8 20.144 -6.286 2.105 0.50 31.30 ATOM 61 CZ ARG A 8 20.593 -7.456 2.571 0.50 33.78 ATOM 62 NH1 ARG A 8 21.775 -7.935 2.205 0.50 33.30 ATOM 63 NH2 ARG A 8 19.830 -8.171 3.421 0.50 34.38 ATOM 64 N CYS A 9 25.346 -2.178 0.525 1.00 19.79 ATOM 65 CA CYS A 9 26.304 -1.411 -0.228 1.00 20.76 ATOM 66 C CYS A 9 27.054 -2.298 -1.197 1.00 21.48 ATOM 67 O CYS A 9 27.104 -3.532 -1.028 1.00 20.95 ATOM 68 CB CYS A 9 27.317 -0.801 0.704 1.00 20.47 ATOM 69 SG CYS A 9 28.036 -1.957 1.901 1.00 21.01 ATOM 70 N LYS A 10 27.691 -1.647 -2.162 1.00 21.90 ATOM 71 CA LYS A 10 28.586 -2.333 -3.080 1.00 23.25 ATOM 72 C LYS A 10 30.025 -1.846 -2.880 1.00 22.24 ATOM 73 O LYS A 10 30.991 -2.553 -3.255 1.00 24.10 ATOM 74 CB LYS A 10 28.145 -2.109 -4.534 1.00 24.77 ATOM 75 CG LYS A 10 26.868 -2.803 -4.835 1.00 28.74 ATOM 76 CD LYS A 10 26.376 -2.594 -6.283 1.00 33.76 ATOM 77 CE LYS A 10 27.328 -3.177 -7.228 1.00 37.16 ATOM 78 NZ LYS A 10 26.688 -3.304 -8.560 1.00 39.27 ATOM 79 N GLN A 11 30.154 -0.604 -2.397 1.00 21.73 ATOM 80 CA GLN A 11 31.477 0.034 -2.168 1.00 21.70 ATOM 81 C GLN A 11 31.396 0.996 -1.001 1.00 22.33 ATOM 82 O GLN A 11 30.303 1.311 -0.581 1.00 20.12 ATOM 83 CB GLN A 11 32.007 0.694 -3.470 0.60 23.25 ATOM 84 CG GLN A 11 31.365 2.035 -3.931 0.60 24.26 ATOM 85 CD GLN A 11 32.083 2.633 -5.134 0.60 26.16 ATOM 86 OE1 GLN A 11 31.811 2.262 -6.272 0.60 34.43 ATOM 87 NE2 GLN A 11 32.981 3.533 -4.901 0.60 28.36 ATOM 88 N ASP A 12 32.549 1.421 -0.468 1.00 21.44 ATOM 89 CA ASP A 12 32.617 2.072 0.811 1.00 22.00 ATOM 90 C ASP A 12 31.898 3.427 0.715 1.00 21.75 ATOM 91 O ASP A 12 31.285 3.860 1.649 1.00 22.28 ATOM 92 CB ASP A 12 34.022 2.312 1.233 1.00 22.75 ATOM 93 CG ASP A 12 34.782 1.046 1.546 1.00 22.59 ATOM 94 OD1 ASP A 12 34.216 -0.125 1.537 1.00 22.56 ATOM 95 OD2 ASP A 12 36.025 1.242 1.779 1.00 24.61 ATOM 96 N SER A 13 31.921 4.053 -0.444 1.00 22.20 ATOM 97 CA SER A 13 31.340 5.380 -0.599 1.00 23.20 ATOM 98 C SER A 13 29.839 5.368 -0.500 1.00 23.18 ATOM 99 O SER A 13 29.230 6.447 -0.304 1.00 23.62 ATOM 100 CB SER A 13 31.747 6.029 -1.901 1.00 22.55 ATOM 101 OG SER A 13 31.327 5.302 -2.994 1.00 26.14 ATOM 102 N ASP A 14 29.252 4.175 -0.593 1.00 22.41 ATOM 103 CA ASP A 14 27.809 3.985 -0.429 1.00 21.12 ATOM 104 C ASP A 14 27.355 4.199 1.029 1.00 21.85 ATOM 105 O ASP A 14 26.151 4.395 1.307 1.00 21.76 ATOM 106 CB ASP A 14 27.400 2.559 -0.831 1.00 22.10 ATOM 107 CG ASP A 14 27.546 2.276 -2.321 1.00 24.28 ATOM 108 OD1 ASP A 14 27.678 3.232 -3.097 1.00 26.88 ATOM 109 OD2 ASP A 14 27.498 1.046 -2.688 1.00 26.55 ATOM 110 N CYS A 15 28.322 4.179 1.948 1.00 20.39 ATOM 111 CA CYS A 15 28.049 4.154 3.389 1.00 21.35 ATOM 112 C CYS A 15 28.158 5.547 4.019 1.00 22.62 ATOM 113 O CYS A 15 28.776 6.451 3.454 1.00 24.59 ATOM 114 CB CYS A 15 29.002 3.174 4.042 1.00 21.26 ATOM 115 SG CYS A 15 28.754 1.486 3.462 1.00 22.17 ATOM 116 N LEU A 16 27.635 5.690 5.224 1.00 23.08 ATOM 117 CA LEU A 16 27.767 6.961 5.956 1.00 23.95 ATOM 118 C LEU A 16 29.199 7.176 6.410 1.00 24.26 ATOM 119 O LEU A 16 30.042 6.252 6.329 1.00 22.69 ATOM 120 CB LEU A 16 26.802 6.956 7.138 1.00 24.45 ATOM 121 CG LEU A 16 25.284 6.905 6.748 1.00 27.05 ATOM 122 CD1 LEU A 16 24.463 6.702 7.891 1.00 27.58 ATOM 123 CD2 LEU A 16 24.883 8.191 6.083 1.00 28.96 ATOM 124 N ALA A 17 29.476 8.363 6.945 1.00 24.82 ATOM 125 CA ALA A 17 30.805 8.672 7.409 1.00 27.33 ATOM 126 C ALA A 17 31.232 7.720 8.518 1.00 28.21 ATOM 127 O ALA A 17 30.453 7.406 9.414 1.00 29.29 ATOM 128 CB ALA A 17 30.823 10.074 7.947 1.00 26.73 ATOM 129 N GLY A 18 32.471 7.259 8.473 1.00 30.09 ATOM 130 CA GLY A 18 32.946 6.333 9.486 1.00 29.94 ATOM 131 C GLY A 18 32.751 4.867 9.190 1.00 29.24 ATOM 132 O GLY A 18 33.080 4.005 10.025 1.00 30.89 ATOM 133 N CYS A 19 32.188 4.589 8.013 1.00 27.44 ATOM 134 CA CYS A 19 31.832 3.242 7.628 1.00 26.40 ATOM 135 C CYS A 19 32.610 2.804 6.412 1.00 25.42 ATOM 136 O CYS A 19 33.066 3.615 5.615 1.00 26.78 ATOM 137 CB CYS A 19 30.337 3.168 7.280 1.00 26.23 ATOM 138 SG CYS A 19 29.272 3.779 8.545 1.00 28.52 ATOM 139 N VAL A 20 32.711 1.498 6.273 1.00 22.97 ATOM 140 CA VAL A 20 33.129 0.871 5.035 1.00 22.56 ATOM 141 C VAL A 20 32.128 -0.188 4.652 1.00 21.91 ATOM 142 O VAL A 20 31.316 -0.569 5.471 1.00 22.09 ATOM 143 CB VAL A 20 34.515 0.228 5.239 1.00 23.02 ATOM 144 CG1 VAL A 20 35.532 1.336 5.582 1.00 24.15 ATOM 145 CG2 VAL A 20 34.481 -0.912 6.267 1.00 24.76 ATOM 146 N CYS A 21 32.168 -0.659 3.407 1.00 21.32 ATOM 147 CA CYS A 21 31.273 -1.685 2.936 1.00 21.40 ATOM 148 C CYS A 21 32.007 -2.996 3.179 1.00 21.85 ATOM 149 O CYS A 21 32.988 -3.262 2.528 1.00 22.69 ATOM 150 CB CYS A 21 30.973 -1.510 1.439 1.00 20.26 ATOM 151 SG CYS A 21 29.702 -2.641 0.901 1.00 23.22 ATOM 152 N GLY A 22 31.542 -3.763 4.149 1.00 23.52 ATOM 153 CA GLY A 22 32.097 -5.069 4.491 1.00 26.12 ATOM 154 C GLY A 22 31.916 -6.099 3.394 1.00 26.33 ATOM 155 O GLY A 22 31.158 -5.927 2.449 1.00 26.60 ATOM 156 N PRO A 23 32.642 -7.201 3.506 1.00 27.40 ATOM 157 CA PRO A 23 32.522 -8.286 2.554 1.00 28.51 ATOM 158 C PRO A 23 31.071 -8.876 2.521 1.00 29.02 ATOM 159 O PRO A 23 30.644 -9.460 1.481 1.00 30.50 ATOM 160 CB PRO A 23 33.564 -9.322 3.058 1.00 29.06 ATOM 161 CG PRO A 23 33.871 -8.919 4.521 1.00 30.87 ATOM 162 CD PRO A 23 33.625 -7.413 4.577 1.00 27.75 ATOM 163 N ASN A 24 30.344 -8.644 3.625 1.00 27.24 ATOM 164 CA ASN A 24 28.913 -8.982 3.805 1.00 26.58 ATOM 165 C ASN A 24 27.869 -8.113 3.004 1.00 24.79 ATOM 166 O ASN A 24 26.701 -8.485 2.904 1.00 24.67 ATOM 167 CB ASN A 24 28.556 -9.129 5.317 1.00 27.18 ATOM 168 CG ASN A 24 28.501 -7.805 6.098 1.00 27.37 ATOM 169 OD1 ASN A 24 28.648 -6.730 5.524 1.00 30.11 ATOM 170 ND2 ASN A 24 28.315 -7.896 7.441 1.00 27.86 ATOM 171 N GLY A 25 28.326 -7.073 2.326 1.00 21.84 ATOM 172 CA GLY A 25 27.496 -6.186 1.538 1.00 20.54 ATOM 173 C GLY A 25 26.674 -5.270 2.420 1.00 20.99 ATOM 174 O GLY A 25 25.697 -4.718 1.948 1.00 20.11 ATOM 175 N PHE A 26 27.065 -5.146 3.694 1.00 21.44 ATOM 176 CA PHE A 26 26.504 -4.122 4.610 1.00 20.11 ATOM 177 C PHE A 26 27.539 -3.119 5.123 1.00 20.24 ATOM 178 O PHE A 26 28.719 -3.434 5.292 1.00 20.30 ATOM 179 CB PHE A 26 25.835 -4.726 5.837 1.00 20.58 ATOM 180 CG PHE A 26 24.631 -5.575 5.558 1.00 23.65 ATOM 181 CD1 PHE A 26 24.752 -6.926 5.317 1.00 24.97 ATOM 182 CD2 PHE A 26 23.377 -5.021 5.616 1.00 24.15 ATOM 183 CE1 PHE A 26 23.642 -7.692 5.114 1.00 26.28 ATOM 184 CE2 PHE A 26 22.260 -5.783 5.487 1.00 27.03 ATOM 185 CZ PHE A 26 22.379 -7.114 5.216 1.00 27.06 ATOM 186 N CYS A 27 27.077 -1.881 5.330 1.00 19.99 ATOM 187 CA CYS A 27 27.917 -0.809 5.923 1.00 20.34 ATOM 188 C CYS A 27 28.281 -1.139 7.349 1.00 20.83 ATOM 189 O CYS A 27 27.426 -1.533 8.172 1.00 21.53 ATOM 190 CB CYS A 27 27.192 0.547 5.852 1.00 19.84 ATOM 191 SG CYS A 27 26.899 1.044 4.146 1.00 20.99 ATOM 192 N GLY A 28 29.563 -1.000 7.674 1.00 22.23 ATOM 193 CA GLY A 28 30.000 -1.318 9.013 1.00 23.42 ATOM 194 C GLY A 28 31.289 -0.601 9.373 1.00 26.06 ATOM 195 O GLY A 28 31.837 0.152 8.604 1.00 24.20 ATOM 196 NA NA A1032 29.182 7.560 1.658 1.00 29.22 TER