HEADER TOXIN 20-AUG-08 3E8Y TITLE Xray structure of scorpion toxin BmBKTx1 COMPND MOL_ID: 1; COMPND 2 MOLECULE: Potassium channel toxin alpha-KTx 19.1; COMPND 3 CHAIN: X; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 1.10 ANGSTORMS DBREF 3E8Y X 1 31 UNP P83407 KA191_MESMA 1 31 SEQRES 1 X 30 ALA CYS TYR SER SER ASP CYS ARG VAL LYS CYS VAL ALA SEQRES 2 X 30 MET GLY PHE SER SER GLY LYS CYS ILE ASN SER LYS CYS SEQRES 3 X 30 LYS CYS TYR LYS ATOM 1 N ALA X 2 50.332 -1.088 14.526 1.00 24.39 ATOM 2 CA ALA X 2 48.936 -0.717 14.154 1.00 20.65 ATOM 3 C ALA X 2 48.968 -0.016 12.785 1.00 18.28 ATOM 4 O ALA X 2 50.047 0.278 12.275 1.00 22.19 ATOM 5 CB ALA X 2 48.435 0.245 15.173 1.00 23.62 ATOM 6 N CYS X 3 47.812 0.268 12.213 1.00 13.53 ATOM 7 CA CYS X 3 47.733 1.082 11.020 1.00 11.75 ATOM 8 C CYS X 3 47.363 2.490 11.408 1.00 11.38 ATOM 9 O CYS X 3 46.478 2.702 12.242 1.00 11.65 ATOM 10 CB CYS X 3 46.685 0.466 10.088 1.00 12.11 ATOM 11 SG CYS X 3 46.526 1.259 8.480 1.00 12.23 ATOM 12 N TYR X 4 48.046 3.460 10.794 1.00 11.77 ATOM 13 CA TYR X 4 47.763 4.881 10.987 1.00 12.26 ATOM 14 C TYR X 4 47.473 5.469 9.636 1.00 12.16 ATOM 15 O TYR X 4 48.247 5.301 8.679 1.00 12.34 ATOM 16 CB TYR X 4 48.945 5.606 11.657 1.00 14.73 ATOM 17 CG TYR X 4 49.138 5.100 13.051 1.00 17.60 ATOM 18 CD1 TYR X 4 49.952 4.008 13.297 1.00 21.42 ATOM 19 CD2 TYR X 4 48.404 5.648 14.107 1.00 19.13 ATOM 20 CE1 TYR X 4 50.093 3.491 14.581 1.00 24.50 ATOM 21 CE2 TYR X 4 48.532 5.129 15.411 1.00 22.62 ATOM 22 CZ TYR X 4 49.361 4.056 15.612 1.00 23.06 ATOM 23 OH TYR X 4 49.493 3.555 16.897 1.00 28.03 ATOM 24 N SER X 5 46.395 6.233 9.560 1.00 14.12 ATOM 25 CA SER X 5 45.878 6.735 8.304 1.00 15.31 ATOM 26 C SER X 5 46.847 7.493 7.447 1.00 12.45 ATOM 27 O SER X 5 46.965 7.231 6.237 1.00 12.44 ATOM 28 CB SER X 5 44.647 7.622 8.574 1.00 17.34 ATOM 29 OG SER X 5 45.018 8.874 9.145 1.00 27.72 ATOM 30 N SER X 6 47.533 8.461 8.021 1.00 12.99 ATOM 31 CA SER X 6 48.396 9.307 7.252 0.50 12.91 ATOM 32 C SER X 6 49.532 8.483 6.642 1.00 11.18 ATOM 33 O SER X 6 49.861 8.599 5.442 1.00 11.70 ATOM 34 CB SER X 6 48.916 10.407 8.168 0.50 15.24 ATOM 35 OG SER X 6 49.360 9.852 9.391 0.50 17.84 ATOM 36 N ASP X 7 50.167 7.660 7.479 1.00 10.16 ATOM 37 CA ASP X 7 51.262 6.851 6.991 1.00 9.44 ATOM 38 C ASP X 7 50.799 5.867 5.940 1.00 8.82 ATOM 39 O ASP X 7 51.520 5.616 4.957 1.00 9.14 ATOM 40 CB ASP X 7 51.926 6.104 8.111 1.00 10.52 ATOM 41 CG ASP X 7 52.689 6.997 9.028 1.00 11.91 ATOM 42 OD1 ASP X 7 53.281 8.030 8.624 1.00 11.00 ATOM 43 OD2 ASP X 7 52.749 6.606 10.203 1.00 20.13 ATOM 44 N CYS X 8 49.616 5.278 6.115 1.00 9.36 ATOM 45 CA CYS X 8 49.108 4.328 5.147 1.00 9.13 ATOM 46 C CYS X 8 48.897 4.992 3.783 1.00 8.93 ATOM 47 O CYS X 8 49.336 4.458 2.758 1.00 9.24 ATOM 48 CB CYS X 8 47.816 3.727 5.699 1.00 10.04 ATOM 49 SG CYS X 8 46.991 2.619 4.496 1.00 10.08 ATOM 50 N ARG X 9 48.234 6.152 3.762 1.00 9.22 ATOM 51 CA ARG X 9 48.055 6.837 2.508 0.50 9.06 ATOM 52 C ARG X 9 49.384 7.106 1.815 1.00 8.62 ATOM 53 O ARG X 9 49.533 6.921 0.598 1.00 8.95 ATOM 54 CB ARG X 9 47.346 8.142 2.756 0.50 10.63 ATOM 55 CG ARG X 9 47.135 8.891 1.510 0.50 12.68 ATOM 56 CD ARG X 9 46.412 10.175 1.795 0.50 16.25 ATOM 57 N VAL X 10 50.353 7.606 2.581 1.00 8.32 ATOM 58 CA VAL X 10 51.645 7.994 2.027 1.00 8.29 ATOM 59 C VAL X 10 52.416 6.779 1.516 1.00 7.91 ATOM 60 O VAL X 10 53.049 6.861 0.435 1.00 8.14 ATOM 61 CB VAL X 10 52.411 8.821 3.077 1.00 8.81 ATOM 62 CG1 VAL X 10 53.861 9.072 2.640 1.00 9.74 ATOM 63 CG2 VAL X 10 51.687 10.160 3.290 1.00 10.00 ATOM 64 N LYS X 11 52.383 5.654 2.230 1.00 7.89 ATOM 65 CA LYS X 11 52.975 4.402 1.752 0.50 7.89 ATOM 66 C LYS X 11 52.377 4.006 0.414 1.00 7.60 ATOM 67 O LYS X 11 53.068 3.648 -0.541 1.00 8.14 ATOM 68 CB LYS X 11 52.717 3.273 2.777 0.50 8.65 ATOM 69 CG LYS X 11 53.809 3.296 3.861 0.50 8.62 ATOM 70 CD LYS X 11 53.668 2.069 4.754 0.50 9.84 ATOM 71 CE LYS X 11 52.445 2.194 5.629 0.50 9.81 ATOM 72 NZ LYS X 11 52.393 1.028 6.528 0.50 10.91 ATOM 73 N CYS X 12 51.036 4.020 0.362 1.00 7.41 ATOM 74 CA CYS X 12 50.356 3.600 -0.844 1.00 7.50 ATOM 75 C CYS X 12 50.722 4.490 -2.038 1.00 7.54 ATOM 76 O CYS X 12 51.020 3.983 -3.123 1.00 7.93 ATOM 77 CB CYS X 12 48.838 3.613 -0.601 1.00 7.68 ATOM 78 SG CYS X 12 48.294 2.300 0.526 1.00 8.00 ATOM 79 N VAL X 13 50.692 5.816 -1.842 1.00 7.83 ATOM 80 CA VAL X 13 51.041 6.725 -2.939 1.00 7.75 ATOM 81 C VAL X 13 52.488 6.492 -3.360 1.00 7.81 ATOM 82 O VAL X 13 52.808 6.498 -4.560 1.00 8.78 ATOM 83 CB VAL X 13 50.772 8.189 -2.535 1.00 8.30 ATOM 84 CG1 VAL X 13 51.293 9.156 -3.591 1.00 8.89 ATOM 85 CG2 VAL X 13 49.258 8.393 -2.345 1.00 9.52 ATOM 86 N ALA X 14 53.395 6.290 -2.398 1.00 7.81 ATOM 87 CA ALA X 14 54.805 6.082 -2.730 1.00 8.54 ATOM 88 C ALA X 14 55.001 4.907 -3.665 1.00 8.56 ATOM 89 O ALA X 14 55.914 4.934 -4.498 1.00 9.63 ATOM 90 CB ALA X 14 55.614 5.891 -1.480 1.00 10.01 ATOM 91 N MET X 15 54.172 3.862 -3.517 1.00 8.55 ATOM 92 CA MET X 15 54.271 2.679 -4.363 1.00 10.58 ATOM 93 C MET X 15 53.510 2.798 -5.651 1.00 10.12 ATOM 94 O MET X 15 53.552 1.850 -6.439 1.00 13.02 ATOM 95 CB MET X 15 53.861 1.444 -3.564 1.00 12.94 ATOM 96 CG MET X 15 54.967 1.099 -2.596 1.00 15.97 ATOM 97 SD MET X 15 54.548 -0.293 -1.497 0.50 17.59 ATOM 98 CE MET X 15 52.828 0.083 -1.377 0.50 7.20 ATOM 99 N GLY X 16 52.869 3.931 -5.919 1.00 9.17 ATOM 100 CA GLY X 16 52.186 4.173 -7.181 1.00 10.30 ATOM 101 C GLY X 16 50.703 3.940 -7.121 1.00 10.04 ATOM 102 O GLY X 16 50.043 4.046 -8.162 1.00 14.04 ATOM 103 N PHE X 17 50.139 3.657 -5.954 1.00 8.50 ATOM 104 CA PHE X 17 48.703 3.510 -5.794 1.00 8.55 ATOM 105 C PHE X 17 48.077 4.884 -5.570 1.00 9.27 ATOM 106 O PHE X 17 48.774 5.888 -5.341 1.00 10.41 ATOM 107 CB PHE X 17 48.397 2.570 -4.648 1.00 8.46 ATOM 108 CG PHE X 17 48.916 1.176 -4.868 1.00 7.64 ATOM 109 CD1 PHE X 17 49.840 0.636 -4.001 1.00 9.08 ATOM 110 CD2 PHE X 17 48.474 0.384 -5.935 1.00 9.11 ATOM 111 CE1 PHE X 17 50.296 -0.679 -4.185 1.00 10.56 ATOM 112 CE2 PHE X 17 48.937 -0.902 -6.115 1.00 9.58 ATOM 113 CZ PHE X 17 49.852 -1.429 -5.256 1.00 9.96 ATOM 114 N SER X 18 46.750 4.946 -5.616 1.00 9.94 ATOM 115 CA SER X 18 46.064 6.245 -5.536 1.00 11.28 ATOM 116 C SER X 18 46.042 6.839 -4.147 1.00 10.68 ATOM 117 O SER X 18 46.152 8.052 -3.958 1.00 11.55 ATOM 118 CB SER X 18 44.582 6.055 -6.072 1.00 13.19 ATOM 119 OG SER X 18 44.616 5.735 -7.451 1.00 13.51 ATOM 120 N SER X 19 45.807 5.985 -3.161 1.00 10.32 ATOM 121 CA SER X 19 45.680 6.348 -1.740 1.00 9.99 ATOM 122 C SER X 19 45.545 5.051 -0.968 1.00 8.21 ATOM 123 O SER X 19 45.754 3.967 -1.541 1.00 8.55 ATOM 124 CB SER X 19 44.430 7.248 -1.520 1.00 12.91 ATOM 125 OG SER X 19 44.482 7.714 -0.186 1.00 16.16 ATOM 126 N GLY X 20 45.158 5.128 0.298 1.00 8.84 ATOM 127 CA GLY X 20 44.861 3.940 1.080 1.00 9.70 ATOM 128 C GLY X 20 44.165 4.282 2.354 1.00 10.04 ATOM 129 O GLY X 20 44.111 5.448 2.741 1.00 13.61 ATOM 130 N LYS X 21 43.639 3.260 3.011 1.00 9.75 ATOM 131 CA LYS X 21 42.951 3.441 4.287 0.50 12.23 ATOM 132 C LYS X 21 43.198 2.263 5.177 1.00 10.15 ATOM 133 O LYS X 21 43.403 1.126 4.730 1.00 10.93 ATOM 134 CB LYS X 21 41.412 3.553 4.151 0.50 13.42 ATOM 135 CG LYS X 21 40.881 4.732 3.357 0.50 17.37 ATOM 136 CD LYS X 21 39.519 5.275 3.875 0.50 18.27 ATOM 137 N CYS X 22 43.148 2.534 6.474 1.00 10.42 ATOM 138 CA CYS X 22 43.277 1.502 7.508 1.00 10.59 ATOM 139 C CYS X 22 41.951 0.777 7.696 1.00 10.63 ATOM 140 O CYS X 22 40.926 1.412 8.015 1.00 13.42 ATOM 141 CB CYS X 22 43.690 2.111 8.825 1.00 11.29 ATOM 142 SG CYS X 22 45.315 2.856 8.819 1.00 12.08 ATOM 143 N ILE X 23 41.976 -0.538 7.570 1.00 9.49 ATOM 144 CA ILE X 23 40.800 -1.384 7.747 1.00 10.33 ATOM 145 C ILE X 23 41.246 -2.575 8.557 1.00 9.60 ATOM 146 O ILE X 23 42.134 -3.333 8.133 1.00 10.11 ATOM 147 CB ILE X 23 40.275 -1.886 6.385 1.00 12.57 ATOM 148 CG1 ILE X 23 39.868 -0.716 5.492 1.00 14.85 ATOM 149 CG2 ILE X 23 39.149 -2.915 6.595 1.00 14.66 ATOM 150 CD1 ILE X 23 38.691 0.068 5.993 1.00 16.53 ATOM 151 N ASN X 24 40.675 -2.771 9.749 1.00 10.00 ATOM 152 CA ASN X 24 40.964 -3.956 10.540 1.00 11.10 ATOM 153 C ASN X 24 42.472 -4.157 10.747 1.00 10.35 ATOM 154 O ASN X 24 42.984 -5.259 10.613 1.00 11.17 ATOM 155 CB ASN X 24 40.327 -5.190 9.907 1.00 12.80 ATOM 156 CG ASN X 24 40.277 -6.363 10.852 1.00 15.01 ATOM 157 OD1 ASN X 24 40.395 -6.209 12.100 1.00 15.39 ATOM 158 ND2 ASN X 24 40.134 -7.559 10.281 1.00 19.80 ATOM 159 N SER X 25 43.161 -3.051 11.084 1.00 10.36 ATOM 160 CA SER X 25 44.607 -3.067 11.337 0.33 11.29 ATOM 161 C SER X 25 45.474 -3.213 10.115 1.00 11.40 ATOM 162 O SER X 25 46.676 -3.353 10.265 1.00 15.08 ATOM 163 CB SER X 25 45.013 -4.118 12.371 0.33 13.10 ATOM 164 OG SER X 25 44.541 -3.691 13.615 0.33 12.49 ATOM 165 N LYS X 26 44.893 -3.179 8.920 1.00 10.18 ATOM 166 CA LYS X 26 45.642 -3.384 7.674 1.00 10.25 ATOM 167 C LYS X 26 45.613 -2.085 6.871 1.00 8.99 ATOM 168 O LYS X 26 44.556 -1.458 6.720 1.00 9.17 ATOM 169 CB LYS X 26 45.026 -4.509 6.860 1.00 11.05 ATOM 170 CG LYS X 26 45.068 -5.824 7.616 1.00 15.39 ATOM 171 CD LYS X 26 44.351 -6.918 6.867 1.00 20.96 ATOM 172 CE LYS X 26 44.150 -8.136 7.739 1.00 25.42 ATOM 173 N CYS X 27 46.748 -1.716 6.288 1.00 8.96 ATOM 174 CA CYS X 27 46.799 -0.602 5.353 1.00 8.38 ATOM 175 C CYS X 27 46.461 -1.141 3.973 1.00 7.46 ATOM 176 O CYS X 27 47.262 -1.866 3.363 1.00 7.90 ATOM 177 CB CYS X 27 48.203 -0.002 5.378 1.00 8.99 ATOM 178 SG CYS X 27 48.432 1.223 4.077 1.00 9.23 ATOM 179 N LYS X 28 45.263 -0.799 3.506 1.00 7.47 ATOM 180 CA LYS X 28 44.718 -1.289 2.246 1.00 7.67 ATOM 181 C LYS X 28 44.735 -0.176 1.222 1.00 7.60 ATOM 182 O LYS X 28 44.012 0.835 1.355 1.00 7.96 ATOM 183 CB LYS X 28 43.293 -1.844 2.458 1.00 9.06 ATOM 184 CG LYS X 28 43.242 -2.978 3.470 1.00 10.36 ATOM 185 CD LYS X 28 41.928 -3.739 3.333 1.00 13.20 ATOM 186 CE LYS X 28 41.784 -4.863 4.334 1.00 15.85 ATOM 187 NZ LYS X 28 40.572 -5.709 3.945 1.00 19.30 ATOM 188 N CYS X 29 45.544 -0.338 0.169 1.00 7.19 ATOM 189 CA CYS X 29 45.619 0.709 -0.838 1.00 7.14 ATOM 190 C CYS X 29 44.463 0.652 -1.805 1.00 6.98 ATOM 191 O CYS X 29 43.954 -0.438 -2.151 1.00 7.89 ATOM 192 CB CYS X 29 46.908 0.648 -1.653 1.00 7.56 ATOM 193 SG CYS X 29 48.428 0.642 -0.656 1.00 7.92 ATOM 194 N TYR X 30 44.065 1.816 -2.303 1.00 7.38 ATOM 195 CA TYR X 30 43.226 1.949 -3.489 1.00 8.00 ATOM 196 C TYR X 30 44.129 1.920 -4.699 1.00 8.00 ATOM 197 O TYR X 30 45.168 2.637 -4.711 1.00 9.31 ATOM 198 CB TYR X 30 42.488 3.286 -3.476 1.00 8.51 ATOM 199 CG TYR X 30 41.520 3.468 -2.342 1.00 8.52 ATOM 200 CD1 TYR X 30 41.813 4.292 -1.273 1.00 10.71 ATOM 201 CD2 TYR X 30 40.260 2.875 -2.356 1.00 9.22 ATOM 202 CE1 TYR X 30 40.926 4.544 -0.243 1.00 12.47 ATOM 203 CE2 TYR X 30 39.325 3.149 -1.326 1.00 10.06 ATOM 204 CZ TYR X 30 39.685 3.989 -0.287 1.00 11.00 ATOM 205 OH TYR X 30 38.810 4.288 0.742 1.00 13.91 ATOM 206 N LYS X 31 43.806 1.153 -5.727 1.00 8.25 ATOM 207 CA LYS X 31 44.613 1.095 -6.919 1.00 9.01 ATOM 208 C LYS X 31 44.849 2.460 -7.517 1.00 9.60 ATOM 209 O LYS X 31 43.887 3.260 -7.571 1.00 9.75 ATOM 210 CB LYS X 31 43.972 0.145 -7.936 1.00 9.58 ATOM 211 CG LYS X 31 44.730 0.010 -9.259 1.00 10.31 ATOM 212 CD LYS X 31 46.173 -0.524 -9.113 1.00 11.19 ATOM 213 CE LYS X 31 46.802 -0.733 -10.462 1.00 12.51 ATOM 214 NZ LYS X 31 48.254 -1.115 -10.316 1.00 13.00 ATOM 215 OXT LYS X 31 46.004 2.732 -7.926 1.00 11.39 ATOM 216 CL CL X 101 42.317 -0.027 11.795 0.50 8.98 TER