HEADER VIRAL PROTEIN/IMMUNE SYSTEM 26-AUG-06 2I60 TITLE Crystal structure of [Phe23]M47, a scorpion-toxin mimic of CD4, in TITLE 2 complex with HIV-1 YU2 GP120 envelope glycoprotein and anti-HIV-1 TITLE 3 antibody 17B COMPND MOL_ID: 4; COMPND 2 MOLECULE: [PHE23]M47, SCORPION-TOXIN MIMIC OF CD4; COMPND 3 CHAIN: M, S; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.40 ANGSTORMS DBREF 2I60 S 1 27 PDB 2I60 2I60 1 27 SEQRES 1 S 27 MPT ASN LEU HIS PHE CYS GLN LEU ARG CYS LYS SER LEU SEQRES 2 S 27 GLY LEU LEU GLY ARG CYS ALA DPR THR PHE CYS ALA CYS SEQRES 3 S 27 VLM ATOM 1 CA MPT S 1 -25.552 28.954 38.896 1.00 40.85 ATOM 2 C MPT S 1 -26.284 27.979 38.020 1.00 39.73 ATOM 3 O MPT S 1 -27.503 28.004 37.947 1.00 39.85 ATOM 4 CB MPT S 1 -25.622 28.569 40.381 1.00 40.75 ATOM 5 SG MPT S 1 -26.420 26.968 40.807 1.00 39.31 ATOM 6 N ASN S 2 -25.535 27.131 37.330 1.00 41.75 ATOM 7 CA ASN S 2 -26.134 26.102 36.502 1.00 43.67 ATOM 8 C ASN S 2 -26.328 24.936 37.475 1.00 43.88 ATOM 9 O ASN S 2 -25.367 24.265 37.870 1.00 42.31 ATOM 10 CB ASN S 2 -25.194 25.710 35.353 1.00 47.54 ATOM 11 CG ASN S 2 -24.920 26.874 34.379 1.00 52.69 ATOM 12 OD1 ASN S 2 -24.159 26.725 33.413 1.00 53.50 ATOM 13 ND2 ASN S 2 -25.541 28.031 34.633 1.00 51.97 ATOM 14 N LEU S 3 -27.576 24.733 37.886 1.00 44.18 ATOM 15 CA LEU S 3 -27.925 23.678 38.824 1.00 45.54 ATOM 16 C LEU S 3 -27.567 22.310 38.259 1.00 47.89 ATOM 17 O LEU S 3 -27.236 21.389 39.004 1.00 48.44 ATOM 18 CB LEU S 3 -29.420 23.741 39.149 1.00 42.70 ATOM 19 CG LEU S 3 -29.902 22.911 40.342 1.00 41.66 ATOM 20 CD1 LEU S 3 -29.113 23.271 41.603 1.00 37.76 ATOM 21 CD2 LEU S 3 -31.388 23.157 40.550 1.00 38.30 ATOM 22 N HIS S 4 -27.631 22.185 36.937 1.00 50.57 ATOM 23 CA HIS S 4 -27.299 20.930 36.270 1.00 52.90 ATOM 24 C HIS S 4 -25.857 20.580 36.609 1.00 52.27 ATOM 25 O HIS S 4 -25.557 19.469 37.047 1.00 51.80 ATOM 26 CB HIS S 4 -27.442 21.076 34.747 1.00 57.10 ATOM 27 CG HIS S 4 -27.781 22.466 34.297 1.00 61.20 ATOM 28 ND1 HIS S 4 -29.040 23.013 34.445 1.00 63.10 ATOM 29 CD2 HIS S 4 -27.022 23.424 33.715 1.00 62.93 ATOM 30 CE1 HIS S 4 -29.041 24.247 33.972 1.00 63.54 ATOM 31 NE2 HIS S 4 -27.829 24.521 33.523 1.00 64.43 ATOM 32 N PHE S 5 -24.970 21.549 36.403 1.00 51.03 ATOM 33 CA PHE S 5 -23.559 21.360 36.676 1.00 50.08 ATOM 34 C PHE S 5 -23.271 21.273 38.167 1.00 48.98 ATOM 35 O PHE S 5 -22.577 20.357 38.617 1.00 49.18 ATOM 36 CB PHE S 5 -22.753 22.497 36.058 1.00 51.10 ATOM 37 CG PHE S 5 -22.771 22.499 34.563 1.00 53.50 ATOM 38 CD1 PHE S 5 -22.364 21.378 33.852 1.00 52.91 ATOM 39 CD2 PHE S 5 -23.194 23.623 33.859 1.00 55.15 ATOM 40 CE1 PHE S 5 -22.378 21.377 32.455 1.00 54.31 ATOM 41 CE2 PHE S 5 -23.210 23.631 32.460 1.00 55.73 ATOM 42 CZ PHE S 5 -22.802 22.506 31.758 1.00 53.96 ATOM 43 N CYS S 6 -23.805 22.225 38.928 1.00 46.21 ATOM 44 CA CYS S 6 -23.602 22.258 40.370 1.00 43.07 ATOM 45 C CYS S 6 -23.781 20.872 40.966 1.00 42.24 ATOM 46 O CYS S 6 -23.009 20.459 41.829 1.00 40.39 ATOM 47 CB CYS S 6 -24.589 23.224 41.017 1.00 42.87 ATOM 48 SG CYS S 6 -24.381 23.478 42.813 1.00 40.60 ATOM 49 N GLN S 7 -24.802 20.162 40.489 1.00 42.11 ATOM 50 CA GLN S 7 -25.109 18.812 40.956 1.00 42.05 ATOM 51 C GLN S 7 -24.060 17.809 40.481 1.00 41.68 ATOM 52 O GLN S 7 -23.632 16.938 41.246 1.00 42.40 ATOM 53 CB GLN S 7 -26.500 18.395 40.470 1.00 42.12 ATOM 54 CG GLN S 7 -27.590 19.360 40.906 1.00 42.37 ATOM 55 CD GLN S 7 -28.959 19.006 40.360 1.00 43.64 ATOM 56 OE1 GLN S 7 -29.116 18.738 39.164 1.00 42.43 ATOM 57 NE2 GLN S 7 -29.967 19.019 41.234 1.00 42.38 ATOM 58 N LEU S 8 -23.649 17.924 39.222 1.00 39.79 ATOM 59 CA LEU S 8 -22.629 17.031 38.690 1.00 38.29 ATOM 60 C LEU S 8 -21.372 17.172 39.538 1.00 38.28 ATOM 61 O LEU S 8 -20.853 16.187 40.072 1.00 37.02 ATOM 62 CB LEU S 8 -22.293 17.386 37.241 1.00 36.44 ATOM 63 CG LEU S 8 -23.354 17.079 36.188 1.00 35.10 ATOM 64 CD1 LEU S 8 -22.913 17.642 34.848 1.00 34.41 ATOM 65 CD2 LEU S 8 -23.566 15.586 36.103 1.00 31.74 ATOM 66 N ARG S 9 -20.896 18.408 39.654 1.00 36.69 ATOM 67 CA ARG S 9 -19.695 18.707 40.420 1.00 37.24 ATOM 68 C ARG S 9 -19.792 18.330 41.902 1.00 37.50 ATOM 69 O ARG S 9 -18.856 17.742 42.457 1.00 37.55 ATOM 70 CB ARG S 9 -19.341 20.198 40.303 1.00 38.72 ATOM 71 CG ARG S 9 -18.933 20.672 38.910 1.00 39.51 ATOM 72 CD ARG S 9 -18.184 22.016 38.976 1.00 40.91 ATOM 73 NE ARG S 9 -19.029 23.143 39.376 1.00 41.36 ATOM 74 CZ ARG S 9 -18.718 24.013 40.338 1.00 42.27 ATOM 75 NH1 ARG S 9 -17.580 23.891 41.011 1.00 42.10 ATOM 76 NH2 ARG S 9 -19.544 25.012 40.629 1.00 43.07 ATOM 77 N CYS S 10 -20.902 18.679 42.550 1.00 36.17 ATOM 78 CA CYS S 10 -21.061 18.358 43.964 1.00 35.16 ATOM 79 C CYS S 10 -21.161 16.861 44.168 1.00 35.52 ATOM 80 O CYS S 10 -20.967 16.366 45.276 1.00 36.94 ATOM 81 CB CYS S 10 -22.299 19.032 44.561 1.00 34.61 ATOM 82 SG CYS S 10 -22.114 20.814 44.926 1.00 31.75 ATOM 83 N LYS S 11 -21.474 16.143 43.098 1.00 35.25 ATOM 84 CA LYS S 11 -21.573 14.692 43.160 1.00 34.67 ATOM 85 C LYS S 11 -20.178 14.195 43.557 1.00 32.46 ATOM 86 O LYS S 11 -20.040 13.212 44.276 1.00 28.84 ATOM 87 CB LYS S 11 -21.980 14.146 41.786 1.00 36.55 ATOM 88 CG LYS S 11 -22.604 12.770 41.803 1.00 38.17 ATOM 89 CD LYS S 11 -23.256 12.468 40.464 1.00 40.78 ATOM 90 CE LYS S 11 -24.170 11.233 40.519 1.00 41.92 ATOM 91 NZ LYS S 11 -23.444 9.940 40.689 1.00 43.08 ATOM 92 N SER S 12 -19.152 14.915 43.103 1.00 31.48 ATOM 93 CA SER S 12 -17.761 14.575 43.396 1.00 32.38 ATOM 94 C SER S 12 -17.422 14.604 44.885 1.00 33.30 ATOM 95 O SER S 12 -16.558 13.865 45.344 1.00 35.22 ATOM 96 CB SER S 12 -16.806 15.522 42.658 1.00 30.11 ATOM 97 OG SER S 12 -16.744 15.243 41.275 1.00 27.26 ATOM 98 N LEU S 13 -18.078 15.470 45.643 1.00 33.80 ATOM 99 CA LEU S 13 -17.793 15.550 47.071 1.00 35.09 ATOM 100 C LEU S 13 -18.667 14.525 47.782 1.00 35.34 ATOM 101 O LEU S 13 -18.488 14.246 48.962 1.00 35.67 ATOM 102 CB LEU S 13 -18.079 16.972 47.608 1.00 32.99 ATOM 103 CG LEU S 13 -17.380 18.176 46.933 1.00 32.87 ATOM 104 CD1 LEU S 13 -17.714 19.467 47.674 1.00 31.12 ATOM 105 CD2 LEU S 13 -15.878 17.976 46.914 1.00 30.47 ATOM 106 N GLY S 14 -19.599 13.951 47.030 1.00 36.27 ATOM 107 CA GLY S 14 -20.518 12.978 47.587 1.00 36.48 ATOM 108 C GLY S 14 -21.728 13.696 48.149 1.00 36.31 ATOM 109 O GLY S 14 -22.438 13.168 49.002 1.00 34.96 ATOM 110 N LEU S 15 -21.978 14.906 47.657 1.00 37.28 ATOM 111 CA LEU S 15 -23.097 15.693 48.156 1.00 37.53 ATOM 112 C LEU S 15 -24.122 16.160 47.120 1.00 38.30 ATOM 113 O LEU S 15 -23.968 15.945 45.910 1.00 36.94 ATOM 114 CB LEU S 15 -22.547 16.901 48.914 1.00 37.36 ATOM 115 CG LEU S 15 -21.674 16.611 50.140 1.00 37.53 ATOM 116 CD1 LEU S 15 -21.000 17.903 50.602 1.00 34.78 ATOM 117 CD2 LEU S 15 -22.528 15.998 51.253 1.00 34.09 ATOM 118 N LEU S 16 -25.174 16.804 47.624 1.00 40.04 ATOM 119 CA LEU S 16 -26.251 17.339 46.799 1.00 40.23 ATOM 120 C LEU S 16 -25.975 18.805 46.500 1.00 40.97 ATOM 121 O LEU S 16 -25.469 19.535 47.351 1.00 40.68 ATOM 122 CB LEU S 16 -27.579 17.219 47.532 1.00 40.26 ATOM 123 CG LEU S 16 -27.845 15.867 48.195 1.00 41.56 ATOM 124 CD1 LEU S 16 -29.269 15.865 48.751 1.00 39.01 ATOM 125 CD2 LEU S 16 -27.635 14.737 47.180 1.00 39.93 ATOM 126 N GLY S 17 -26.312 19.235 45.290 1.00 41.39 ATOM 127 CA GLY S 17 -26.076 20.614 44.919 1.00 40.53 ATOM 128 C GLY S 17 -27.342 21.433 44.815 1.00 40.25 ATOM 129 O GLY S 17 -28.414 20.915 44.511 1.00 40.18 ATOM 130 N ARG S 18 -27.205 22.721 45.094 1.00 40.77 ATOM 131 CA ARG S 18 -28.303 23.673 45.015 1.00 41.19 ATOM 132 C ARG S 18 -27.646 25.026 44.783 1.00 40.83 ATOM 133 O ARG S 18 -26.511 25.250 45.210 1.00 40.41 ATOM 134 CB ARG S 18 -29.128 23.687 46.305 1.00 41.36 ATOM 135 CG ARG S 18 -28.448 24.289 47.512 1.00 43.90 ATOM 136 CD ARG S 18 -29.268 24.030 48.763 1.00 46.36 ATOM 137 NE ARG S 18 -28.687 24.634 49.961 1.00 49.46 ATOM 138 CZ ARG S 18 -29.112 24.385 51.198 1.00 50.37 ATOM 139 NH1 ARG S 18 -30.118 23.543 51.389 1.00 51.96 ATOM 140 NH2 ARG S 18 -28.537 24.967 52.244 1.00 49.24 ATOM 141 N CYS S 19 -28.337 25.916 44.079 1.00 40.08 ATOM 142 CA CYS S 19 -27.778 27.226 43.810 1.00 37.58 ATOM 143 C CYS S 19 -27.745 28.050 45.084 1.00 36.06 ATOM 144 O CYS S 19 -28.422 27.756 46.068 1.00 35.61 ATOM 145 CB CYS S 19 -28.592 27.974 42.746 1.00 37.50 ATOM 146 SG CYS S 19 -28.407 27.412 41.016 1.00 39.80 ATOM 147 N ALA S 20 -26.913 29.074 45.066 1.00 34.77 ATOM 148 CA ALA S 20 -26.792 29.987 46.182 1.00 33.06 ATOM 149 C ALA S 20 -26.670 31.327 45.474 1.00 33.55 ATOM 150 O ALA S 20 -25.593 31.911 45.417 1.00 36.99 ATOM 151 CB ALA S 20 -25.549 29.677 46.997 1.00 29.56 ATOM 152 N DPR S 21 -27.779 31.804 44.879 1.00 33.02 ATOM 153 CA DPR S 21 -27.682 32.881 43.888 1.00 32.98 ATOM 154 CB DPR S 21 -29.146 33.199 43.580 1.00 32.47 ATOM 155 CG DPR S 21 -29.875 32.831 44.823 1.00 31.55 ATOM 156 CD DPR S 21 -29.153 31.638 45.385 1.00 31.80 ATOM 157 C DPR S 21 -26.968 32.423 42.622 1.00 34.24 ATOM 158 O DPR S 21 -27.428 31.496 41.955 1.00 35.34 ATOM 159 N THR S 22 -25.853 33.070 42.298 1.00 34.67 ATOM 160 CA THR S 22 -25.122 32.773 41.072 1.00 35.29 ATOM 161 C THR S 22 -24.068 31.696 41.306 1.00 35.56 ATOM 162 O THR S 22 -23.415 31.239 40.368 1.00 34.81 ATOM 163 CB THR S 22 -24.462 34.048 40.515 1.00 35.61 ATOM 164 OG1 THR S 22 -23.510 34.549 41.461 1.00 37.47 ATOM 165 CG2 THR S 22 -25.480 35.173 40.413 1.00 29.22 ATOM 166 N PHE S 23 -23.855 31.333 42.566 1.00 36.54 ATOM 167 CA PHE S 23 -22.852 30.327 42.910 1.00 37.99 ATOM 168 C PHE S 23 -23.443 28.959 43.229 1.00 37.99 ATOM 169 O PHE S 23 -24.660 28.813 43.384 1.00 37.48 ATOM 170 CB PHE S 23 -22.006 30.792 44.104 1.00 39.02 ATOM 171 CG PHE S 23 -21.352 32.131 43.907 1.00 38.97 ATOM 172 CD1 PHE S 23 -21.872 33.272 44.511 1.00 38.85 ATOM 173 CD2 PHE S 23 -20.208 32.251 43.124 1.00 40.14 ATOM 174 CE1 PHE S 23 -21.260 34.513 44.343 1.00 39.58 ATOM 175 CE2 PHE S 23 -19.586 33.491 42.947 1.00 40.08 ATOM 176 CZ PHE S 23 -20.112 34.623 43.558 1.00 39.46 ATOM 177 N CYS S 24 -22.561 27.967 43.328 1.00 37.41 ATOM 178 CA CYS S 24 -22.947 26.590 43.618 1.00 37.08 ATOM 179 C CYS S 24 -22.571 26.183 45.035 1.00 36.72 ATOM 180 O CYS S 24 -21.463 26.453 45.503 1.00 37.03 ATOM 181 CB CYS S 24 -22.263 25.654 42.630 1.00 40.03 ATOM 182 SG CYS S 24 -22.391 23.872 43.005 1.00 44.67 ATOM 183 N ALA S 25 -23.492 25.514 45.715 1.00 36.45 ATOM 184 CA ALA S 25 -23.249 25.077 47.079 1.00 35.36 ATOM 185 C ALA S 25 -23.583 23.600 47.224 1.00 36.23 ATOM 186 O ALA S 25 -24.597 23.131 46.708 1.00 35.75 ATOM 187 CB ALA S 25 -24.083 25.899 48.034 1.00 32.93 ATOM 188 N CYS S 26 -22.719 22.870 47.923 1.00 37.61 ATOM 189 CA CYS S 26 -22.918 21.443 48.143 1.00 37.85 ATOM 190 C CYS S 26 -23.439 21.202 49.559 1.00 39.03 ATOM 191 O CYS S 26 -22.874 21.695 50.531 1.00 39.78 ATOM 192 CB CYS S 26 -21.603 20.676 47.959 1.00 36.74 ATOM 193 SG CYS S 26 -20.698 20.883 46.385 1.00 34.24 ATOM 194 N VLM S 27 -24.516 20.434 49.667 1.00 41.22 ATOM 195 CA VLM S 27 -25.112 20.122 50.958 1.00 41.57 ATOM 196 C VLM S 27 -25.019 18.628 51.238 1.00 41.45 ATOM 197 O VLM S 27 -25.102 17.848 50.269 1.00 41.61 ATOM 198 CB VLM S 27 -26.590 20.540 50.986 1.00 41.62 ATOM 199 CG1 VLM S 27 -27.252 20.064 52.267 1.00 43.01 ATOM 200 CG2 VLM S 27 -26.693 22.043 50.875 1.00 44.16 ATOM 201 NT VLM S 27 -24.882 18.259 52.423 1.00 40.58 TER