HEADER TOXIN 23-SEP-03 1R1G TITLE Crystal Structure of the Scorpion Toxin BmBKTtx1 COMPND MOL_ID: 1; COMPND 2 MOLECULE: Neurotoxin BmK37; COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.72 ANGSTORMS DBREF 1R1G B 1 31 UNP P83407 SCBX_MESMA 1 31 MODRES 1R1G LAL B 1 ALA N,N-DIMETHYL-L-ALANINE MODRES 1R1G MLY B 11 LYS N-DIMETHYL-LYSINE MODRES 1R1G MLY B 21 LYS N-DIMETHYL-LYSINE MODRES 1R1G MLY B 26 LYS N-DIMETHYL-LYSINE MODRES 1R1G MLY B 28 LYS N-DIMETHYL-LYSINE MODRES 1R1G MLY B 31 LYS N-DIMETHYL-LYSINE SEQRES 1 B 31 ALA ALA CYS TYR SER SER ASP CYS ARG VAL LYS CYS VAL SEQRES 2 B 31 ALA MET GLY PHE SER SER GLY LYS CYS ILE ASN SER LYS SEQRES 3 B 31 CYS LYS CYS TYR LYS ATOM 1 CB LAL B 1 2.889 8.221 29.521 1.00 20.82 ATOM 2 C LAL B 1 5.007 7.519 28.386 1.00 20.28 ATOM 3 O LAL B 1 4.628 7.266 27.243 1.00 20.58 ATOM 4 N LAL B 1 4.350 9.927 28.485 1.00 20.99 ATOM 5 CA LAL B 1 4.331 8.621 29.208 1.00 21.10 ATOM 6 N ALA B 2 6.000 6.860 28.976 1.00 19.19 ATOM 7 CA ALA B 2 6.707 5.785 28.283 1.00 17.71 ATOM 8 C ALA B 2 5.837 4.537 28.188 1.00 16.98 ATOM 9 O ALA B 2 5.900 3.798 27.206 1.00 16.12 ATOM 10 CB ALA B 2 8.008 5.457 29.007 1.00 18.18 ATOM 11 N CYS B 3 5.017 4.311 29.210 1.00 15.92 ATOM 12 CA CYS B 3 4.147 3.140 29.234 1.00 15.28 ATOM 13 C CYS B 3 2.703 3.479 29.584 1.00 15.00 ATOM 14 O CYS B 3 2.420 3.939 30.692 1.00 14.40 ATOM 15 CB CYS B 3 4.669 2.113 30.258 1.00 14.80 ATOM 16 SG CYS B 3 3.979 0.425 30.122 1.00 14.38 ATOM 17 N TYR B 4 1.802 3.271 28.627 1.00 13.88 ATOM 18 CA TYR B 4 0.366 3.460 28.839 1.00 13.09 ATOM 19 C TYR B 4 -0.096 2.022 29.010 1.00 12.67 ATOM 20 O TYR B 4 0.274 1.168 28.215 1.00 12.43 ATOM 21 CB TYR B 4 -0.336 4.019 27.598 1.00 14.62 ATOM 22 CG TYR B 4 -0.106 5.479 27.298 1.00 16.53 ATOM 23 CD1 TYR B 4 1.076 5.916 26.706 1.00 17.53 ATOM 24 CD2 TYR B 4 -1.091 6.423 27.582 1.00 16.77 ATOM 25 CE1 TYR B 4 1.271 7.264 26.403 1.00 19.21 ATOM 26 CE2 TYR B 4 -0.910 7.763 27.283 1.00 17.84 ATOM 27 CZ TYR B 4 0.271 8.180 26.698 1.00 19.37 ATOM 28 OH TYR B 4 0.452 9.517 26.431 1.00 20.30 ATOM 29 N SER B 5 -0.895 1.744 30.037 0.50 12.16 ATOM 30 CA SER B 5 -1.365 0.379 30.256 0.50 11.96 ATOM 31 C SER B 5 -2.142 -0.155 29.051 0.50 11.85 ATOM 32 O SER B 5 -2.008 -1.324 28.688 0.50 11.06 ATOM 33 CB SER B 5 -2.238 0.301 31.514 0.50 12.73 ATOM 34 OG SER B 5 -3.449 1.015 31.358 0.50 13.96 ATOM 35 N SER B 6 -2.958 0.696 28.433 1.00 11.48 ATOM 36 CA SER B 6 -3.733 0.276 27.270 1.00 11.14 ATOM 37 C SER B 6 -2.842 -0.019 26.072 1.00 10.96 ATOM 38 O SER B 6 -3.058 -1.003 25.366 1.00 10.68 ATOM 39 CB SER B 6 -4.769 1.339 26.890 1.00 10.82 ATOM 40 OG SER B 6 -4.188 2.627 26.813 1.00 13.44 ATOM 41 N ASP B 7 -1.843 0.834 25.851 1.00 10.30 ATOM 42 CA ASP B 7 -0.912 0.660 24.736 1.00 10.26 ATOM 43 C ASP B 7 -0.095 -0.615 24.935 1.00 9.93 ATOM 44 O ASP B 7 0.146 -1.371 23.991 1.00 9.13 ATOM 45 CB ASP B 7 0.014 1.879 24.637 1.00 10.67 ATOM 46 CG ASP B 7 0.905 1.845 23.400 1.00 12.17 ATOM 47 OD1 ASP B 7 0.390 1.594 22.289 1.00 11.82 ATOM 48 OD2 ASP B 7 2.119 2.083 23.534 1.00 13.08 ATOM 49 N CYS B 8 0.330 -0.849 26.169 1.00 9.65 ATOM 50 CA CYS B 8 1.096 -2.047 26.501 1.00 9.78 ATOM 51 C CYS B 8 0.247 -3.284 26.237 1.00 8.97 ATOM 52 O CYS B 8 0.694 -4.248 25.612 1.00 8.91 ATOM 53 CB CYS B 8 1.499 -2.001 27.973 1.00 9.18 ATOM 54 SG CYS B 8 2.187 -3.527 28.689 1.00 9.98 ATOM 55 N ARG B 9 -0.987 -3.245 26.715 1.00 8.81 ATOM 56 CA ARG B 9 -1.902 -4.360 26.539 1.00 9.66 ATOM 57 C ARG B 9 -2.088 -4.746 25.068 1.00 10.35 ATOM 58 O ARG B 9 -1.930 -5.910 24.704 1.00 11.14 ATOM 59 CB ARG B 9 -3.257 -4.024 27.187 1.00 10.49 ATOM 60 CG ARG B 9 -4.343 -5.069 26.944 1.00 11.43 ATOM 61 CD ARG B 9 -5.541 -4.865 27.860 1.00 10.72 ATOM 62 NE ARG B 9 -6.004 -3.482 27.907 1.00 9.46 ATOM 63 CZ ARG B 9 -6.776 -2.897 26.992 1.00 8.65 ATOM 64 NH1 ARG B 9 -7.195 -3.564 25.922 1.00 8.25 ATOM 65 NH2 ARG B 9 -7.130 -1.632 27.155 1.00 8.61 ATOM 66 N VAL B 10 -2.410 -3.775 24.223 1.00 10.87 ATOM 67 CA VAL B 10 -2.625 -4.063 22.810 1.00 12.13 ATOM 68 C VAL B 10 -1.342 -4.414 22.047 1.00 11.76 ATOM 69 O VAL B 10 -1.381 -5.204 21.111 1.00 11.57 ATOM 70 CB VAL B 10 -3.380 -2.895 22.118 1.00 12.69 ATOM 71 CG1 VAL B 10 -4.685 -2.615 22.871 1.00 13.72 ATOM 72 CG2 VAL B 10 -2.524 -1.661 22.076 1.00 13.83 ATOM 73 N MLY B 11 -0.203 -3.858 22.454 1.00 11.21 ATOM 74 CA MLY B 11 1.051 -4.193 21.786 1.00 10.44 ATOM 75 CB MLY B 11 2.133 -3.175 22.152 1.00 11.03 ATOM 76 CG MLY B 11 1.926 -1.864 21.385 1.00 11.70 ATOM 77 CD MLY B 11 2.934 -0.787 21.727 1.00 11.49 ATOM 78 CE MLY B 11 2.836 0.356 20.721 1.00 13.00 ATOM 79 NZ MLY B 11 3.580 1.588 21.129 1.00 12.82 ATOM 80 CH1 MLY B 11 5.062 1.505 21.215 1.00 14.56 ATOM 81 CH2 MLY B 11 3.204 2.673 20.182 1.00 14.73 ATOM 82 C MLY B 11 1.445 -5.621 22.165 1.00 9.96 ATOM 83 O MLY B 11 2.065 -6.347 21.383 1.00 10.15 ATOM 84 N CYS B 12 1.056 -6.037 23.361 1.00 9.27 ATOM 85 CA CYS B 12 1.344 -7.397 23.784 1.00 10.04 ATOM 86 C CYS B 12 0.438 -8.347 22.996 1.00 10.32 ATOM 87 O CYS B 12 0.874 -9.402 22.544 1.00 10.00 ATOM 88 CB CYS B 12 1.086 -7.563 25.275 1.00 9.39 ATOM 89 SG CYS B 12 2.331 -6.805 26.368 1.00 10.56 ATOM 90 N VAL B 13 -0.823 -7.964 22.826 1.00 10.60 ATOM 91 CA VAL B 13 -1.756 -8.803 22.083 1.00 10.63 ATOM 92 C VAL B 13 -1.284 -8.968 20.639 1.00 11.43 ATOM 93 O VAL B 13 -1.406 -10.053 20.054 1.00 11.41 ATOM 94 CB VAL B 13 -3.184 -8.206 22.117 1.00 10.20 ATOM 95 CG1 VAL B 13 -4.085 -8.919 21.123 1.00 10.70 ATOM 96 CG2 VAL B 13 -3.757 -8.351 23.523 1.00 9.85 ATOM 97 N ALA B 14 -0.720 -7.903 20.075 1.00 11.74 ATOM 98 CA ALA B 14 -0.223 -7.954 18.700 1.00 12.56 ATOM 99 C ALA B 14 0.929 -8.943 18.554 1.00 13.38 ATOM 100 O ALA B 14 1.230 -9.399 17.447 1.00 13.33 ATOM 101 CB ALA B 14 0.231 -6.568 18.251 1.00 13.38 ATOM 102 N MET B 15 1.573 -9.252 19.680 1.00 12.71 ATOM 103 CA MET B 15 2.693 -10.186 19.738 1.00 12.50 ATOM 104 C MET B 15 2.272 -11.583 20.197 1.00 12.36 ATOM 105 O MET B 15 3.119 -12.401 20.564 1.00 12.61 ATOM 106 CB MET B 15 3.779 -9.659 20.684 0.50 11.72 ATOM 107 CG MET B 15 4.752 -8.662 20.064 0.50 10.57 ATOM 108 SD MET B 15 5.844 -9.403 18.821 0.50 11.11 ATOM 109 CE MET B 15 5.077 -8.839 17.344 0.50 9.54 ATOM 110 N GLY B 16 0.969 -11.850 20.198 1.00 12.97 ATOM 111 CA GLY B 16 0.490 -13.164 20.596 1.00 12.35 ATOM 112 C GLY B 16 0.248 -13.437 22.072 1.00 12.78 ATOM 113 O GLY B 16 -0.005 -14.582 22.446 1.00 13.44 ATOM 114 N PHE B 17 0.328 -12.408 22.911 1.00 11.95 ATOM 115 CA PHE B 17 0.090 -12.575 24.348 1.00 10.88 ATOM 116 C PHE B 17 -1.381 -12.292 24.632 1.00 10.61 ATOM 117 O PHE B 17 -2.092 -11.766 23.777 1.00 10.76 ATOM 118 CB PHE B 17 0.946 -11.606 25.166 1.00 11.37 ATOM 119 CG PHE B 17 2.425 -11.882 25.107 1.00 12.23 ATOM 120 CD1 PHE B 17 3.217 -11.294 24.126 1.00 13.54 ATOM 121 CD2 PHE B 17 3.033 -12.705 26.059 1.00 13.50 ATOM 122 CE1 PHE B 17 4.601 -11.514 24.091 1.00 13.91 ATOM 123 CE2 PHE B 17 4.416 -12.934 26.032 1.00 13.53 ATOM 124 CZ PHE B 17 5.198 -12.335 25.047 1.00 13.72 ATOM 125 N SER B 18 -1.840 -12.629 25.834 1.00 10.02 ATOM 126 CA SER B 18 -3.239 -12.392 26.190 1.00 11.20 ATOM 127 C SER B 18 -3.470 -10.969 26.675 1.00 11.24 ATOM 128 O SER B 18 -4.528 -10.368 26.438 1.00 10.95 ATOM 129 CB SER B 18 -3.691 -13.380 27.270 1.00 10.34 ATOM 130 OG SER B 18 -3.769 -14.692 26.745 1.00 13.15 ATOM 131 N SER B 19 -2.477 -10.428 27.365 1.00 10.76 ATOM 132 CA SER B 19 -2.572 -9.077 27.871 1.00 11.42 ATOM 133 C SER B 19 -1.193 -8.553 28.240 1.00 11.51 ATOM 134 O SER B 19 -0.167 -9.180 27.954 1.00 10.15 ATOM 135 CB SER B 19 -3.482 -9.032 29.104 1.00 11.09 ATOM 136 OG SER B 19 -3.861 -7.694 29.386 1.00 12.74 ATOM 137 N GLY B 20 -1.193 -7.388 28.872 1.00 12.08 ATOM 138 CA GLY B 20 0.041 -6.766 29.305 1.00 12.52 ATOM 139 C GLY B 20 -0.263 -5.668 30.299 1.00 12.80 ATOM 140 O GLY B 20 -1.338 -5.069 30.254 1.00 13.53 ATOM 141 N MLY B 21 0.675 -5.408 31.203 1.00 13.16 ATOM 142 CA MLY B 21 0.499 -4.360 32.199 1.00 13.95 ATOM 143 CB MLY B 21 0.165 -4.951 33.572 1.00 16.20 ATOM 144 CG MLY B 21 -1.010 -5.897 33.603 1.00 18.73 ATOM 145 CD MLY B 21 -1.024 -6.652 34.924 1.00 21.21 ATOM 146 CE MLY B 21 -2.139 -7.685 34.956 1.00 24.53 ATOM 147 NZ MLY B 21 -2.047 -8.590 36.137 1.00 25.92 ATOM 148 CH1 MLY B 21 -2.135 -7.858 37.432 1.00 27.31 ATOM 149 CH2 MLY B 21 -3.210 -9.503 35.977 1.00 27.19 ATOM 150 C MLY B 21 1.798 -3.596 32.329 1.00 13.24 ATOM 151 O MLY B 21 2.870 -4.148 32.080 1.00 12.53 ATOM 152 N CYS B 22 1.694 -2.327 32.712 1.00 11.55 ATOM 153 CA CYS B 22 2.877 -1.513 32.926 1.00 11.29 ATOM 154 C CYS B 22 3.355 -1.746 34.352 1.00 11.12 ATOM 155 O CYS B 22 2.577 -1.640 35.300 1.00 10.71 ATOM 156 CB CYS B 22 2.565 -0.027 32.752 1.00 11.02 ATOM 157 SG CYS B 22 2.174 0.470 31.047 1.00 13.51 ATOM 158 N ILE B 23 4.631 -2.076 34.502 1.00 11.10 ATOM 159 CA ILE B 23 5.211 -2.282 35.826 1.00 11.61 ATOM 160 C ILE B 23 6.432 -1.370 35.873 1.00 13.01 ATOM 161 O ILE B 23 7.416 -1.602 35.168 1.00 12.53 ATOM 162 CB ILE B 23 5.626 -3.750 36.045 1.00 11.76 ATOM 163 CG1 ILE B 23 4.399 -4.657 35.916 1.00 9.63 ATOM 164 CG2 ILE B 23 6.250 -3.916 37.432 1.00 11.66 ATOM 165 CD1 ILE B 23 4.704 -6.115 36.035 1.00 9.73 ATOM 166 N ASN B 24 6.352 -0.328 36.697 1.00 14.03 ATOM 167 CA ASN B 24 7.425 0.659 36.801 1.00 15.59 ATOM 168 C ASN B 24 7.791 1.215 35.428 1.00 16.32 ATOM 169 O ASN B 24 8.967 1.302 35.065 1.00 16.53 ATOM 170 CB ASN B 24 8.659 0.063 37.480 1.00 15.87 ATOM 171 CG ASN B 24 8.502 -0.022 38.984 1.00 16.83 ATOM 172 OD1 ASN B 24 7.622 0.617 39.562 1.00 15.99 ATOM 173 ND2 ASN B 24 9.365 -0.799 39.628 1.00 18.06 ATOM 174 N SER B 25 6.761 1.580 34.670 1.00 16.61 ATOM 175 CA SER B 25 6.920 2.160 33.338 1.00 17.37 ATOM 176 C SER B 25 7.477 1.221 32.272 1.00 17.01 ATOM 177 O SER B 25 7.868 1.663 31.191 1.00 17.50 ATOM 178 CB SER B 25 7.777 3.430 33.419 1.00 17.70 ATOM 179 OG SER B 25 7.107 4.442 34.152 1.00 17.97 ATOM 180 N MLY B 26 7.532 -0.071 32.574 1.00 16.48 ATOM 181 CA MLY B 26 8.002 -1.042 31.598 1.00 16.03 ATOM 182 CB MLY B 26 9.205 -1.834 32.117 1.00 18.76 ATOM 183 CG MLY B 26 9.730 -2.834 31.089 1.00 21.48 ATOM 184 CD MLY B 26 10.739 -3.814 31.671 1.00 24.36 ATOM 185 CE MLY B 26 12.011 -3.126 32.134 1.00 25.68 ATOM 186 NZ MLY B 26 13.067 -4.111 32.531 1.00 27.65 ATOM 187 CH1 MLY B 26 12.697 -5.040 33.634 1.00 27.69 ATOM 188 CH2 MLY B 26 13.506 -4.952 31.376 1.00 28.00 ATOM 189 C MLY B 26 6.860 -2.013 31.326 1.00 14.81 ATOM 190 O MLY B 26 6.290 -2.583 32.248 1.00 14.76 ATOM 191 N CYS B 27 6.537 -2.206 30.057 1.00 12.89 ATOM 192 CA CYS B 27 5.466 -3.113 29.673 1.00 12.35 ATOM 193 C CYS B 27 5.826 -4.586 29.867 1.00 12.39 ATOM 194 O CYS B 27 6.895 -5.032 29.447 1.00 12.41 ATOM 195 CB CYS B 27 5.105 -2.870 28.205 1.00 11.91 ATOM 196 SG CYS B 27 3.791 -3.929 27.523 1.00 10.47 ATOM 197 N MLY B 28 4.933 -5.335 30.511 1.00 11.68 ATOM 198 CA MLY B 28 5.137 -6.763 30.715 1.00 12.85 ATOM 199 CB MLY B 28 5.250 -7.114 32.201 1.00 14.72 ATOM 200 CG MLY B 28 5.312 -8.624 32.437 1.00 17.62 ATOM 201 CD MLY B 28 5.889 -8.955 33.790 1.00 21.31 ATOM 202 CE MLY B 28 5.896 -10.457 34.036 1.00 24.90 ATOM 203 NZ MLY B 28 6.822 -10.821 35.152 1.00 27.00 ATOM 204 CH1 MLY B 28 6.530 -10.059 36.398 1.00 28.21 ATOM 205 CH2 MLY B 28 6.719 -12.281 35.420 1.00 27.23 ATOM 206 C MLY B 28 3.965 -7.519 30.111 1.00 12.51 ATOM 207 O MLY B 28 2.814 -7.261 30.456 1.00 12.51 ATOM 208 N CYS B 29 4.261 -8.450 29.212 1.00 11.88 ATOM 209 CA CYS B 29 3.220 -9.230 28.558 1.00 11.79 ATOM 210 C CYS B 29 2.995 -10.581 29.227 1.00 12.73 ATOM 211 O CYS B 29 3.926 -11.177 29.787 1.00 13.14 ATOM 212 CB CYS B 29 3.579 -9.467 27.095 1.00 11.92 ATOM 213 SG CYS B 29 3.949 -7.996 26.093 1.00 11.02 ATOM 214 N TYR B 30 1.759 -11.074 29.145 1.00 12.55 ATOM 215 CA TYR B 30 1.401 -12.359 29.738 1.00 13.53 ATOM 216 C TYR B 30 0.738 -13.255 28.697 1.00 13.49 ATOM 217 O TYR B 30 -0.235 -12.845 28.072 1.00 13.61 ATOM 218 CB TYR B 30 0.421 -12.163 30.897 1.00 14.75 ATOM 219 CG TYR B 30 0.887 -11.216 31.975 1.00 15.66 ATOM 220 CD1 TYR B 30 0.682 -9.840 31.857 1.00 17.24 ATOM 221 CD2 TYR B 30 1.518 -11.698 33.122 1.00 17.53 ATOM 222 CE1 TYR B 30 1.091 -8.964 32.861 1.00 17.41 ATOM 223 CE2 TYR B 30 1.932 -10.835 34.132 1.00 17.78 ATOM 224 CZ TYR B 30 1.714 -9.472 33.996 1.00 18.06 ATOM 225 OH TYR B 30 2.125 -8.625 34.995 1.00 19.23 ATOM 226 N MLY B 31 1.248 -14.475 28.528 1.00 13.35 ATOM 227 CA MLY B 31 0.688 -15.419 27.551 1.00 13.71 ATOM 228 CB MLY B 31 1.615 -16.627 27.364 1.00 14.10 ATOM 229 CG MLY B 31 2.951 -16.343 26.683 1.00 16.25 ATOM 230 CD MLY B 31 2.795 -16.109 25.189 1.00 17.75 ATOM 231 CE MLY B 31 4.158 -16.139 24.498 1.00 20.67 ATOM 232 NZ MLY B 31 4.093 -15.920 23.026 1.00 20.43 ATOM 233 CH1 MLY B 31 3.566 -14.543 22.803 1.00 21.33 ATOM 234 CH2 MLY B 31 5.478 -16.033 22.481 1.00 21.75 ATOM 235 C MLY B 31 -0.688 -15.919 27.975 1.00 13.61 ATOM 236 O MLY B 31 -1.587 -15.993 27.110 1.00 12.19 ATOM 237 OXT MLY B 31 -0.843 -16.249 29.170 1.00 14.19 TER