HEADER VIRAL PROTEIN/IMMUNE SYSTEM 26-AUG-06 2I5Y TITLE Crystal structure of CD4M47, 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: CD4M47, SCORPION-TOXIN MIMIC OF CD4; COMPND 3 CHAIN: M, S; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.20 ANGSTORMS DBREF 2I5Y M 1 27 PDB 2I5Y 2I5Y 1 27 MODRES 2I5Y BIF M 23 PHE SEQRES 1 M 27 MPT ASN LEU HIS PHE CYS GLN LEU ARG CYS LYS SER LEU SEQRES 2 M 27 GLY LEU LEU GLY ARG CYS ALA DPR THR PHE CYS ALA CYS SEQRES 3 M 27 VLM ATOM 1 CA MPT M 1 43.869 7.551 36.723 1.00 43.66 ATOM 2 C MPT M 1 44.228 8.553 35.656 1.00 44.20 ATOM 3 O MPT M 1 45.365 8.579 35.183 1.00 44.57 ATOM 4 CB MPT M 1 43.662 8.195 38.085 1.00 41.22 ATOM 5 SG MPT M 1 44.665 9.679 38.451 1.00 40.76 ATOM 6 N ASN M 2 43.256 9.368 35.264 1.00 44.76 ATOM 7 CA ASN M 2 43.473 10.408 34.236 1.00 46.43 ATOM 8 C ASN M 2 43.950 11.631 35.015 1.00 46.40 ATOM 9 O ASN M 2 43.168 12.535 35.326 1.00 45.60 ATOM 10 CB ASN M 2 42.154 10.700 33.519 1.00 49.63 ATOM 11 CG ASN M 2 42.353 11.427 32.207 1.00 53.58 ATOM 12 OD1 ASN M 2 42.839 12.568 32.171 1.00 55.84 ATOM 13 ND2 ASN M 2 41.982 10.769 31.111 1.00 55.26 ATOM 14 N LEU M 3 45.242 11.644 35.334 1.00 46.75 ATOM 15 CA LEU M 3 45.872 12.737 36.117 1.00 47.10 ATOM 16 C LEU M 3 45.451 14.123 35.642 1.00 48.76 ATOM 17 O LEU M 3 44.886 14.891 36.416 1.00 49.51 ATOM 18 CB LEU M 3 47.395 12.605 36.083 1.00 46.11 ATOM 19 CG LEU M 3 48.148 13.271 37.241 1.00 44.73 ATOM 20 CD1 LEU M 3 47.447 12.988 38.564 1.00 44.26 ATOM 21 CD2 LEU M 3 49.569 12.746 37.280 1.00 43.65 ATOM 22 N HIS M 4 45.724 14.445 34.382 1.00 50.50 ATOM 23 CA HIS M 4 45.371 15.774 33.819 1.00 50.94 ATOM 24 C HIS M 4 43.942 16.164 34.192 1.00 49.85 ATOM 25 O HIS M 4 43.723 17.185 34.843 1.00 49.63 ATOM 26 CB HIS M 4 45.515 15.763 32.301 1.00 55.27 ATOM 27 CG HIS M 4 45.422 17.123 31.682 1.00 60.44 ATOM 28 ND1 HIS M 4 44.346 17.961 31.883 1.00 62.47 ATOM 29 CD2 HIS M 4 46.273 17.794 30.869 1.00 63.36 ATOM 30 CE1 HIS M 4 44.536 19.089 31.222 1.00 62.92 ATOM 31 NE2 HIS M 4 45.698 19.014 30.597 1.00 64.40 ATOM 32 N PHE M 5 42.971 15.358 33.778 1.00 48.72 ATOM 33 CA PHE M 5 41.535 15.639 34.075 1.00 47.85 ATOM 34 C PHE M 5 41.275 15.625 35.589 1.00 45.40 ATOM 35 O PHE M 5 40.440 16.375 36.093 1.00 44.77 ATOM 36 CB PHE M 5 40.642 14.602 33.378 1.00 49.41 ATOM 37 CG PHE M 5 39.219 14.585 33.879 1.00 53.25 ATOM 38 CD1 PHE M 5 38.424 15.726 33.808 1.00 54.45 ATOM 39 CD2 PHE M 5 38.678 13.426 34.437 1.00 55.70 ATOM 40 CE1 PHE M 5 37.112 15.716 34.284 1.00 56.48 ATOM 41 CE2 PHE M 5 37.367 13.404 34.916 1.00 57.49 ATOM 42 CZ PHE M 5 36.582 14.552 34.839 1.00 57.16 ATOM 43 N CYS M 6 41.984 14.768 36.309 1.00 43.95 ATOM 44 CA CYS M 6 41.817 14.658 37.773 1.00 41.43 ATOM 45 C CYS M 6 42.251 15.960 38.425 1.00 41.51 ATOM 46 O CYS M 6 41.517 16.544 39.236 1.00 40.63 ATOM 47 CB CYS M 6 42.675 13.515 38.291 1.00 39.45 ATOM 48 SG CYS M 6 42.619 13.222 40.085 1.00 38.24 ATOM 49 N GLN M 7 43.449 16.403 38.061 1.00 41.23 ATOM 50 CA GLN M 7 44.042 17.640 38.594 1.00 42.25 ATOM 51 C GLN M 7 43.117 18.831 38.385 1.00 43.03 ATOM 52 O GLN M 7 42.880 19.602 39.316 1.00 43.10 ATOM 53 CB GLN M 7 45.387 17.908 37.916 1.00 43.33 ATOM 54 CG GLN M 7 46.552 17.176 38.549 1.00 46.03 ATOM 55 CD GLN M 7 47.858 17.405 37.814 1.00 50.25 ATOM 56 OE1 GLN M 7 48.163 18.532 37.391 1.00 51.73 ATOM 57 NE2 GLN M 7 48.652 16.342 37.669 1.00 49.69 ATOM 58 N LEU M 8 42.592 18.983 37.173 1.00 43.74 ATOM 59 CA LEU M 8 41.691 20.121 36.863 1.00 44.33 ATOM 60 C LEU M 8 40.437 20.100 37.717 1.00 44.73 ATOM 61 O LEU M 8 40.084 21.111 38.315 1.00 44.57 ATOM 62 CB LEU M 8 41.291 20.112 35.390 1.00 45.27 ATOM 63 CG LEU M 8 42.402 20.481 34.403 1.00 47.54 ATOM 64 CD1 LEU M 8 41.843 20.474 32.994 1.00 47.22 ATOM 65 CD2 LEU M 8 42.966 21.850 34.745 1.00 47.04 ATOM 66 N ARG M 9 39.766 18.956 37.782 1.00 45.23 ATOM 67 CA ARG M 9 38.516 18.851 38.576 1.00 46.23 ATOM 68 C ARG M 9 38.754 19.159 40.052 1.00 45.41 ATOM 69 O ARG M 9 38.072 20.005 40.637 1.00 45.00 ATOM 70 CB ARG M 9 37.908 17.457 38.449 1.00 47.71 ATOM 71 CG ARG M 9 36.430 17.458 38.734 1.00 52.20 ATOM 72 CD ARG M 9 35.750 18.495 37.837 1.00 56.11 ATOM 73 NE ARG M 9 34.295 18.429 37.886 1.00 58.79 ATOM 74 CZ ARG M 9 33.586 17.339 37.607 1.00 60.30 ATOM 75 NH1 ARG M 9 34.199 16.214 37.262 1.00 60.92 ATOM 76 NH2 ARG M 9 32.260 17.381 37.657 1.00 61.86 ATOM 77 N CYS M 10 39.706 18.469 40.663 1.00 43.93 ATOM 78 CA CYS M 10 39.989 18.704 42.088 1.00 41.67 ATOM 79 C CYS M 10 40.375 20.167 42.276 1.00 42.49 ATOM 80 O CYS M 10 39.930 20.815 43.225 1.00 41.24 ATOM 81 CB CYS M 10 41.134 17.807 42.569 1.00 38.77 ATOM 82 SG CYS M 10 40.781 16.018 42.657 1.00 31.31 ATOM 83 N LYS M 11 41.194 20.676 41.358 1.00 43.47 ATOM 84 CA LYS M 11 41.680 22.077 41.404 1.00 44.26 ATOM 85 C LYS M 11 40.515 23.060 41.434 1.00 42.77 ATOM 86 O LYS M 11 40.519 23.999 42.218 1.00 42.96 ATOM 87 CB LYS M 11 42.567 22.373 40.193 1.00 46.81 ATOM 88 CG LYS M 11 43.305 23.704 40.283 1.00 50.87 ATOM 89 CD LYS M 11 44.319 23.692 41.423 1.00 54.46 ATOM 90 CE LYS M 11 45.412 22.650 41.177 1.00 56.71 ATOM 91 NZ LYS M 11 46.321 22.489 42.350 1.00 58.28 ATOM 92 N SER M 12 39.521 22.850 40.582 1.00 41.67 ATOM 93 CA SER M 12 38.355 23.759 40.542 1.00 40.98 ATOM 94 C SER M 12 37.630 23.688 41.881 1.00 41.50 ATOM 95 O SER M 12 36.554 24.267 42.039 1.00 41.85 ATOM 96 CB SER M 12 37.393 23.349 39.424 1.00 40.30 ATOM 97 OG SER M 12 36.637 22.208 39.791 1.00 40.27 ATOM 98 N LEU M 13 38.220 22.984 42.842 1.00 41.04 ATOM 99 CA LEU M 13 37.612 22.836 44.179 1.00 42.37 ATOM 100 C LEU M 13 38.650 23.177 45.241 1.00 42.69 ATOM 101 O LEU M 13 38.430 22.959 46.442 1.00 42.33 ATOM 102 CB LEU M 13 37.107 21.403 44.362 1.00 43.38 ATOM 103 CG LEU M 13 35.953 21.032 43.424 1.00 45.06 ATOM 104 CD1 LEU M 13 35.819 19.522 43.328 1.00 44.56 ATOM 105 CD2 LEU M 13 34.661 21.671 43.926 1.00 43.62 ATOM 106 N GLY M 14 39.784 23.704 44.788 1.00 42.75 ATOM 107 CA GLY M 14 40.852 24.086 45.693 1.00 42.73 ATOM 108 C GLY M 14 41.621 22.933 46.299 1.00 43.39 ATOM 109 O GLY M 14 42.305 23.101 47.306 1.00 43.96 ATOM 110 N LEU M 15 41.516 21.762 45.686 1.00 42.84 ATOM 111 CA LEU M 15 42.217 20.572 46.190 1.00 40.92 ATOM 112 C LEU M 15 43.220 20.145 45.141 1.00 41.24 ATOM 113 O LEU M 15 43.169 20.590 43.990 1.00 40.40 ATOM 114 CB LEU M 15 41.222 19.439 46.436 1.00 41.31 ATOM 115 CG LEU M 15 40.128 19.723 47.469 1.00 41.95 ATOM 116 CD1 LEU M 15 39.094 18.606 47.447 1.00 41.37 ATOM 117 CD2 LEU M 15 40.753 19.865 48.855 1.00 39.37 ATOM 118 N LEU M 16 44.144 19.288 45.541 1.00 41.67 ATOM 119 CA LEU M 16 45.147 18.808 44.599 1.00 43.66 ATOM 120 C LEU M 16 44.641 17.462 44.113 1.00 43.47 ATOM 121 O LEU M 16 43.998 16.722 44.862 1.00 41.15 ATOM 122 CB LEU M 16 46.509 18.647 45.283 1.00 46.54 ATOM 123 CG LEU M 16 47.115 19.836 46.046 1.00 49.58 ATOM 124 CD1 LEU M 16 48.617 19.573 46.235 1.00 49.65 ATOM 125 CD2 LEU M 16 46.903 21.148 45.281 1.00 48.98 ATOM 126 N GLY M 17 44.910 17.156 42.853 1.00 43.65 ATOM 127 CA GLY M 17 44.466 15.892 42.308 1.00 43.34 ATOM 128 C GLY M 17 45.654 14.980 42.092 1.00 42.80 ATOM 129 O GLY M 17 46.702 15.420 41.618 1.00 42.85 ATOM 130 N ARG M 18 45.497 13.710 42.449 1.00 42.74 ATOM 131 CA ARG M 18 46.576 12.725 42.282 1.00 41.90 ATOM 132 C ARG M 18 45.930 11.359 42.124 1.00 40.79 ATOM 133 O ARG M 18 44.839 11.108 42.653 1.00 40.07 ATOM 134 CB ARG M 18 47.508 12.733 43.498 1.00 44.26 ATOM 135 CG ARG M 18 47.029 11.918 44.680 1.00 47.03 ATOM 136 CD ARG M 18 48.032 11.985 45.822 1.00 49.25 ATOM 137 NE ARG M 18 47.708 11.032 46.881 1.00 51.37 ATOM 138 CZ ARG M 18 47.985 11.221 48.168 1.00 52.09 ATOM 139 NH1 ARG M 18 48.595 12.336 48.562 1.00 50.86 ATOM 140 NH2 ARG M 18 47.644 10.300 49.062 1.00 52.57 ATOM 141 N CYS M 19 46.611 10.480 41.401 1.00 38.91 ATOM 142 CA CYS M 19 46.108 9.114 41.152 1.00 36.84 ATOM 143 C CYS M 19 46.157 8.259 42.402 1.00 34.65 ATOM 144 O CYS M 19 47.025 8.405 43.256 1.00 35.45 ATOM 145 CB CYS M 19 46.934 8.428 40.068 1.00 36.84 ATOM 146 SG CYS M 19 46.597 9.020 38.386 1.00 40.69 ATOM 147 N ALA M 20 45.200 7.349 42.487 1.00 33.29 ATOM 148 CA ALA M 20 45.097 6.412 43.606 1.00 29.02 ATOM 149 C ALA M 20 44.854 5.055 42.942 1.00 28.02 ATOM 150 O ALA M 20 43.718 4.659 42.679 1.00 28.06 ATOM 151 CB ALA M 20 43.947 6.795 44.524 1.00 25.99 ATOM 152 N DPR M 21 45.940 4.347 42.619 1.00 27.56 ATOM 153 CA DPR M 21 45.927 3.380 41.516 1.00 27.48 ATOM 154 CB DPR M 21 47.413 3.110 41.277 1.00 23.26 ATOM 155 CG DPR M 21 48.091 4.359 41.715 1.00 24.62 ATOM 156 CD DPR M 21 47.290 4.878 42.875 1.00 27.67 ATOM 157 C DPR M 21 45.291 3.964 40.259 1.00 27.96 ATOM 158 O DPR M 21 45.777 4.963 39.730 1.00 30.77 ATOM 159 N THR M 22 44.215 3.340 39.790 1.00 24.80 ATOM 160 CA THR M 22 43.551 3.772 38.566 1.00 24.52 ATOM 161 C THR M 22 42.504 4.843 38.856 1.00 24.59 ATOM 162 O THR M 22 41.750 5.243 37.969 1.00 25.58 ATOM 163 CB THR M 22 42.899 2.573 37.854 1.00 24.89 ATOM 164 OG1 THR M 22 41.861 2.030 38.680 1.00 23.18 ATOM 165 CG2 THR M 22 43.887 1.424 37.733 1.00 25.88 ATOM 166 N BIF M 23 42.353 5.257 40.107 1.00 20.99 ATOM 167 CA BIF M 23 41.310 6.251 40.424 1.00 19.88 ATOM 168 C BIF M 23 41.859 7.634 40.693 1.00 22.10 ATOM 169 CB BIF M 23 40.548 5.797 41.663 1.00 19.68 ATOM 170 CG BIF M 23 39.735 4.493 41.692 1.00 20.18 ATOM 171 CD2 BIF M 23 38.616 4.303 40.841 1.00 21.68 ATOM 172 CE2 BIF M 23 37.859 3.115 40.931 1.00 22.72 ATOM 173 CZ BIF M 23 38.188 2.064 41.873 1.00 23.05 ATOM 174 CE1 BIF M 23 39.343 2.296 42.706 1.00 24.17 ATOM 175 CD1 BIF M 23 40.094 3.486 42.611 1.00 22.73 ATOM 176 C8 BIF M 23 36.457 -0.909 43.473 1.00 20.63 ATOM 177 C9 BIF M 23 35.785 -1.464 42.373 1.00 24.16 ATOM 178 C10 BIF M 23 35.895 -0.879 41.095 1.00 24.44 ATOM 179 C11 BIF M 23 36.688 0.281 40.910 1.00 23.95 ATOM 180 C12 BIF M 23 37.399 0.889 42.005 1.00 24.33 ATOM 181 C13 BIF M 23 37.246 0.241 43.300 1.00 22.44 ATOM 182 O BIF M 23 43.033 7.816 41.002 1.00 21.88 ATOM 183 N CYS M 24 40.961 8.609 40.627 1.00 24.33 ATOM 184 CA CYS M 24 41.323 10.010 40.893 1.00 27.90 ATOM 185 C CYS M 24 40.925 10.298 42.327 1.00 26.88 ATOM 186 O CYS M 24 39.836 9.935 42.766 1.00 26.15 ATOM 187 CB CYS M 24 40.575 10.955 39.977 1.00 31.47 ATOM 188 SG CYS M 24 40.675 12.724 40.439 1.00 40.76 ATOM 189 N ALA M 25 41.821 10.945 43.057 1.00 28.91 ATOM 190 CA ALA M 25 41.567 11.294 44.474 1.00 30.31 ATOM 191 C ALA M 25 41.951 12.758 44.673 1.00 31.39 ATOM 192 O ALA M 25 42.943 13.241 44.107 1.00 31.56 ATOM 193 CB ALA M 25 42.404 10.400 45.393 1.00 27.33 ATOM 194 N CYS M 26 41.148 13.477 45.445 1.00 34.09 ATOM 195 CA CYS M 26 41.440 14.898 45.720 1.00 35.66 ATOM 196 C CYS M 26 42.058 14.906 47.123 1.00 38.48 ATOM 197 O CYS M 26 41.629 14.151 47.996 1.00 38.98 ATOM 198 CB CYS M 26 40.163 15.739 45.672 1.00 32.67 ATOM 199 SG CYS M 26 39.307 15.867 44.050 1.00 32.74 ATOM 200 N VLM M 27 43.073 15.736 47.335 1.00 39.84 ATOM 201 CA VLM M 27 43.750 15.803 48.651 1.00 41.31 ATOM 202 C VLM M 27 43.491 17.154 49.302 1.00 42.24 ATOM 203 O VLM M 27 43.754 18.190 48.704 1.00 42.29 ATOM 204 CB VLM M 27 45.265 15.595 48.470 1.00 42.36 ATOM 205 CG1 VLM M 27 46.003 15.859 49.771 1.00 42.53 ATOM 206 CG2 VLM M 27 45.519 14.176 47.985 1.00 44.68 ATOM 207 NT VLM M 27 43.017 17.142 50.458 1.00 40.55 TER