HEADER Viral protein/Immune system 25-FEB-05 1YYM TITLE crystal structure of F23, a scorpion-toxin mimic of CD4, in complex TITLE 2 with HIV-1 YU2 gp120 envelope glycoprotein and anti-HIV-1 antibody COMPND MOL_ID: 4; COMPND 2 MOLECULE: F23, scorpion-toxin mimic of CD4; COMPND 3 CHAIN: M, S; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.20 ANGSTORMS 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 LYS CYS ALA GLY SER PHE CYS ALA CYS SEQRES 3 S 27 VLM ATOM 1 CA MPT S1001 -25.847 29.006 38.733 1.00 41.04 ATOM 2 C MPT S1001 -26.491 27.907 37.925 1.00 41.16 ATOM 3 O MPT S1001 -27.701 27.704 38.011 1.00 41.12 ATOM 4 CB MPT S1001 -25.715 28.668 40.218 1.00 40.70 ATOM 5 SG MPT S1001 -26.281 27.022 40.770 1.00 40.64 ATOM 6 N ASN S1002 -25.692 27.209 37.119 1.00 41.61 ATOM 7 CA ASN S1002 -26.198 26.099 36.314 1.00 40.63 ATOM 8 C ASN S1002 -26.477 24.983 37.315 1.00 38.69 ATOM 9 O ASN S1002 -25.555 24.280 37.729 1.00 34.89 ATOM 10 CB ASN S1002 -25.139 25.641 35.303 1.00 45.29 ATOM 11 CG ASN S1002 -24.795 26.713 34.263 1.00 50.23 ATOM 12 OD1 ASN S1002 -23.851 26.554 33.476 1.00 52.55 ATOM 13 ND2 ASN S1002 -25.559 27.802 34.252 1.00 51.12 ATOM 14 N LEU S1003 -27.738 24.832 37.713 1.00 35.82 ATOM 15 CA LEU S1003 -28.085 23.820 38.702 1.00 36.69 ATOM 16 C LEU S1003 -27.689 22.394 38.320 1.00 37.40 ATOM 17 O LEU S1003 -27.317 21.608 39.192 1.00 34.92 ATOM 18 CB LEU S1003 -29.583 23.872 39.028 1.00 34.26 ATOM 19 CG LEU S1003 -30.076 22.985 40.178 1.00 35.10 ATOM 20 CD1 LEU S1003 -29.249 23.210 41.444 1.00 34.37 ATOM 21 CD2 LEU S1003 -31.534 23.301 40.448 1.00 34.14 ATOM 22 N HIS S1004 -27.747 22.051 37.034 1.00 39.25 ATOM 23 CA HIS S1004 -27.386 20.691 36.638 1.00 40.91 ATOM 24 C HIS S1004 -25.891 20.448 36.811 1.00 40.30 ATOM 25 O HIS S1004 -25.480 19.407 37.324 1.00 38.78 ATOM 26 CB HIS S1004 -27.781 20.404 35.189 1.00 42.82 ATOM 27 CG HIS S1004 -27.378 19.036 34.726 1.00 47.68 ATOM 28 ND1 HIS S1004 -27.895 17.882 35.278 1.00 48.65 ATOM 29 CD2 HIS S1004 -26.464 18.636 33.810 1.00 47.52 ATOM 30 CE1 HIS S1004 -27.316 16.831 34.725 1.00 48.71 ATOM 31 NE2 HIS S1004 -26.443 17.261 33.831 1.00 49.16 ATOM 32 N PHE S1005 -25.083 21.407 36.370 1.00 40.40 ATOM 33 CA PHE S1005 -23.642 21.293 36.500 1.00 40.61 ATOM 34 C PHE S1005 -23.286 21.292 37.985 1.00 39.77 ATOM 35 O PHE S1005 -22.408 20.543 38.423 1.00 41.09 ATOM 36 CB PHE S1005 -22.953 22.455 35.780 1.00 43.40 ATOM 37 CG PHE S1005 -23.141 22.436 34.285 1.00 47.52 ATOM 38 CD1 PHE S1005 -22.753 21.328 33.539 1.00 48.53 ATOM 39 CD2 PHE S1005 -23.710 23.522 33.621 1.00 49.11 ATOM 40 CE1 PHE S1005 -22.928 21.301 32.156 1.00 49.65 ATOM 41 CE2 PHE S1005 -23.891 23.507 32.237 1.00 50.14 ATOM 42 CZ PHE S1005 -23.497 22.390 31.500 1.00 50.16 ATOM 43 N CYS S1006 -23.978 22.115 38.765 1.00 37.33 ATOM 44 CA CYS S1006 -23.706 22.178 40.191 1.00 35.68 ATOM 45 C CYS S1006 -24.003 20.818 40.815 1.00 35.89 ATOM 46 O CYS S1006 -23.359 20.420 41.790 1.00 35.18 ATOM 47 CB CYS S1006 -24.556 23.263 40.853 1.00 33.42 ATOM 48 SG CYS S1006 -24.192 23.527 42.621 1.00 31.78 ATOM 49 N GLN S1007 -24.979 20.108 40.251 1.00 35.61 ATOM 50 CA GLN S1007 -25.338 18.781 40.750 1.00 35.86 ATOM 51 C GLN S1007 -24.243 17.788 40.379 1.00 34.18 ATOM 52 O GLN S1007 -23.816 16.984 41.210 1.00 33.44 ATOM 53 CB GLN S1007 -26.680 18.325 40.168 1.00 36.20 ATOM 54 CG GLN S1007 -27.874 19.132 40.671 1.00 37.53 ATOM 55 CD GLN S1007 -29.167 18.810 39.935 1.00 39.53 ATOM 56 OE1 GLN S1007 -29.229 18.847 38.702 1.00 42.15 ATOM 57 NE2 GLN S1007 -30.211 18.504 40.691 1.00 39.44 ATOM 58 N LEU S1008 -23.784 17.851 39.133 1.00 33.39 ATOM 59 CA LEU S1008 -22.723 16.961 38.677 1.00 32.56 ATOM 60 C LEU S1008 -21.478 17.160 39.525 1.00 31.39 ATOM 61 O LEU S1008 -20.924 16.202 40.055 1.00 31.50 ATOM 62 CB LEU S1008 -22.366 17.240 37.218 1.00 32.71 ATOM 63 CG LEU S1008 -23.421 16.887 36.175 1.00 34.57 ATOM 64 CD1 LEU S1008 -22.968 17.398 34.822 1.00 34.60 ATOM 65 CD2 LEU S1008 -23.638 15.383 36.140 1.00 34.53 ATOM 66 N ARG S1009 -21.050 18.411 39.660 1.00 29.68 ATOM 67 CA ARG S1009 -19.846 18.729 40.418 1.00 28.34 ATOM 68 C ARG S1009 -19.885 18.424 41.919 1.00 28.03 ATOM 69 O ARG S1009 -18.896 17.956 42.479 1.00 26.65 ATOM 70 CB ARG S1009 -19.463 20.196 40.186 1.00 28.73 ATOM 71 CG ARG S1009 -19.176 20.516 38.714 1.00 29.90 ATOM 72 CD ARG S1009 -18.372 21.808 38.531 1.00 30.16 ATOM 73 NE ARG S1009 -19.104 22.987 38.976 1.00 27.69 ATOM 74 CZ ARG S1009 -18.694 23.804 39.939 1.00 27.36 ATOM 75 NH1 ARG S1009 -17.546 23.574 40.564 1.00 26.14 ATOM 76 NH2 ARG S1009 -19.439 24.852 40.276 1.00 27.33 ATOM 77 N CYS S1010 -21.007 18.683 42.579 1.00 27.92 ATOM 78 CA CYS S1010 -21.084 18.397 44.007 1.00 28.54 ATOM 79 C CYS S1010 -21.058 16.888 44.210 1.00 29.89 ATOM 80 O CYS S1010 -20.696 16.396 45.285 1.00 28.26 ATOM 81 CB CYS S1010 -22.353 18.993 44.619 1.00 28.07 ATOM 82 SG CYS S1010 -22.299 20.807 44.857 1.00 28.33 ATOM 83 N LYS S1011 -21.436 16.166 43.156 1.00 30.10 ATOM 84 CA LYS S1011 -21.449 14.710 43.166 1.00 30.82 ATOM 85 C LYS S1011 -20.019 14.229 43.429 1.00 27.94 ATOM 86 O LYS S1011 -19.811 13.208 44.076 1.00 26.04 ATOM 87 CB LYS S1011 -21.955 14.192 41.818 1.00 35.00 ATOM 88 CG LYS S1011 -22.624 12.833 41.863 1.00 39.66 ATOM 89 CD LYS S1011 -23.311 12.519 40.534 1.00 43.56 ATOM 90 CE LYS S1011 -24.401 13.548 40.219 1.00 47.34 ATOM 91 NZ LYS S1011 -25.195 13.235 38.988 1.00 48.92 ATOM 92 N SER S1012 -19.040 14.979 42.933 1.00 25.55 ATOM 93 CA SER S1012 -17.637 14.642 43.155 1.00 26.46 ATOM 94 C SER S1012 -17.300 14.679 44.650 1.00 26.76 ATOM 95 O SER S1012 -16.344 14.046 45.090 1.00 26.58 ATOM 96 CB SER S1012 -16.720 15.617 42.417 1.00 26.05 ATOM 97 OG SER S1012 -16.919 15.549 41.019 1.00 28.66 ATOM 98 N LEU S1013 -18.084 15.420 45.430 1.00 25.52 ATOM 99 CA LEU S1013 -17.842 15.502 46.864 1.00 26.06 ATOM 100 C LEU S1013 -18.761 14.554 47.638 1.00 26.82 ATOM 101 O LEU S1013 -18.755 14.528 48.869 1.00 25.98 ATOM 102 CB LEU S1013 -18.035 16.946 47.353 1.00 24.65 ATOM 103 CG LEU S1013 -17.105 18.004 46.737 1.00 24.87 ATOM 104 CD1 LEU S1013 -17.470 19.389 47.263 1.00 24.29 ATOM 105 CD2 LEU S1013 -15.652 17.672 47.062 1.00 21.92 ATOM 106 N GLY S1014 -19.535 13.760 46.907 1.00 28.49 ATOM 107 CA GLY S1014 -20.458 12.837 47.544 1.00 29.71 ATOM 108 C GLY S1014 -21.620 13.599 48.147 1.00 30.72 ATOM 109 O GLY S1014 -22.283 13.119 49.069 1.00 31.97 ATOM 110 N LEU S1015 -21.878 14.786 47.608 1.00 29.76 ATOM 111 CA LEU S1015 -22.946 15.632 48.117 1.00 31.33 ATOM 112 C LEU S1015 -23.963 16.058 47.069 1.00 31.17 ATOM 113 O LEU S1015 -23.819 15.779 45.880 1.00 31.11 ATOM 114 CB LEU S1015 -22.345 16.893 48.756 1.00 30.29 ATOM 115 CG LEU S1015 -21.280 16.710 49.841 1.00 30.84 ATOM 116 CD1 LEU S1015 -20.776 18.071 50.314 1.00 24.87 ATOM 117 CD2 LEU S1015 -21.872 15.915 51.004 1.00 29.95 ATOM 118 N LEU S1016 -24.991 16.752 47.539 1.00 33.62 ATOM 119 CA LEU S1016 -26.050 17.276 46.689 1.00 34.62 ATOM 120 C LEU S1016 -25.686 18.728 46.360 1.00 35.57 ATOM 121 O LEU S1016 -25.000 19.400 47.139 1.00 35.65 ATOM 122 CB LEU S1016 -27.392 17.226 47.429 1.00 35.29 ATOM 123 CG LEU S1016 -27.789 15.885 48.072 1.00 38.01 ATOM 124 CD1 LEU S1016 -29.173 16.015 48.697 1.00 36.82 ATOM 125 CD2 LEU S1016 -27.774 14.763 47.035 1.00 36.87 ATOM 126 N GLY S1017 -26.133 19.205 45.205 1.00 35.06 ATOM 127 CA GLY S1017 -25.829 20.565 44.815 1.00 34.44 ATOM 128 C GLY S1017 -27.067 21.434 44.785 1.00 35.77 ATOM 129 O GLY S1017 -28.173 20.946 44.576 1.00 36.40 ATOM 130 N LYS S1018 -26.881 22.728 45.009 1.00 35.96 ATOM 131 CA LYS S1018 -27.985 23.678 44.989 1.00 37.04 ATOM 132 C LYS S1018 -27.399 25.051 44.699 1.00 36.52 ATOM 133 O LYS S1018 -26.215 25.290 44.948 1.00 35.69 ATOM 134 CB LYS S1018 -28.712 23.684 46.334 1.00 37.17 ATOM 135 CG LYS S1018 -27.871 24.188 47.493 1.00 40.23 ATOM 136 CD LYS S1018 -28.481 23.810 48.837 1.00 41.97 ATOM 137 CE LYS S1018 -28.328 22.309 49.130 1.00 43.41 ATOM 138 NZ LYS S1018 -29.125 21.413 48.241 1.00 45.24 ATOM 139 N CYS S1019 -28.217 25.954 44.172 1.00 36.45 ATOM 140 CA CYS S1019 -27.718 27.279 43.851 1.00 35.30 ATOM 141 C CYS S1019 -27.702 28.235 45.031 1.00 35.49 ATOM 142 O CYS S1019 -28.621 28.267 45.851 1.00 34.99 ATOM 143 CB CYS S1019 -28.527 27.913 42.720 1.00 35.95 ATOM 144 SG CYS S1019 -28.288 27.261 41.027 1.00 39.00 ATOM 145 N ALA S1020 -26.626 29.009 45.107 1.00 35.07 ATOM 146 CA ALA S1020 -26.456 30.015 46.137 1.00 33.11 ATOM 147 C ALA S1020 -26.121 31.265 45.336 1.00 32.71 ATOM 148 O ALA S1020 -24.955 31.633 45.200 1.00 33.02 ATOM 149 CB ALA S1020 -25.310 29.639 47.049 1.00 33.66 ATOM 150 N GLY S1021 -27.156 31.907 44.797 1.00 33.07 ATOM 151 CA GLY S1021 -26.955 33.087 43.972 1.00 31.23 ATOM 152 C GLY S1021 -26.517 32.563 42.619 1.00 31.79 ATOM 153 O GLY S1021 -27.203 31.719 42.035 1.00 33.12 ATOM 154 N SER S1022 -25.372 33.037 42.128 1.00 31.17 ATOM 155 CA SER S1022 -24.818 32.584 40.848 1.00 31.07 ATOM 156 C SER S1022 -23.725 31.529 41.077 1.00 29.53 ATOM 157 O SER S1022 -23.089 31.080 40.128 1.00 27.73 ATOM 158 CB SER S1022 -24.220 33.758 40.061 1.00 31.47 ATOM 159 OG SER S1022 -25.228 34.611 39.543 1.00 37.12 ATOM 160 N PHE S1023 -23.509 31.144 42.333 1.00 27.71 ATOM 161 CA PHE S1023 -22.490 30.152 42.651 1.00 28.40 ATOM 162 C PHE S1023 -23.081 28.795 42.992 1.00 28.78 ATOM 163 O PHE S1023 -24.270 28.659 43.304 1.00 28.26 ATOM 164 CB PHE S1023 -21.613 30.600 43.833 1.00 28.29 ATOM 165 CG PHE S1023 -21.048 31.979 43.685 1.00 27.06 ATOM 166 CD1 PHE S1023 -21.703 33.074 44.234 1.00 27.76 ATOM 167 CD2 PHE S1023 -19.866 32.189 42.990 1.00 28.03 ATOM 168 CE1 PHE S1023 -21.184 34.362 44.094 1.00 27.62 ATOM 169 CE2 PHE S1023 -19.342 33.476 42.845 1.00 27.62 ATOM 170 CZ PHE S1023 -20.001 34.561 43.398 1.00 25.72 ATOM 171 N CYS S1024 -22.225 27.787 42.935 1.00 28.41 ATOM 172 CA CYS S1024 -22.626 26.429 43.244 1.00 27.47 ATOM 173 C CYS S1024 -22.282 26.105 44.705 1.00 26.98 ATOM 174 O CYS S1024 -21.140 26.282 45.142 1.00 23.44 ATOM 175 CB CYS S1024 -21.899 25.472 42.307 1.00 27.15 ATOM 176 SG CYS S1024 -22.163 23.707 42.662 1.00 34.90 ATOM 177 N ALA S1025 -23.271 25.643 45.462 1.00 26.44 ATOM 178 CA ALA S1025 -23.029 25.270 46.851 1.00 29.71 ATOM 179 C ALA S1025 -23.402 23.801 47.043 1.00 31.33 ATOM 180 O ALA S1025 -24.442 23.337 46.561 1.00 30.49 ATOM 181 CB ALA S1025 -23.837 26.150 47.796 1.00 29.25 ATOM 182 N CYS S1026 -22.536 23.072 47.735 1.00 31.51 ATOM 183 CA CYS S1026 -22.757 21.661 47.996 1.00 33.21 ATOM 184 C CYS S1026 -23.237 21.498 49.438 1.00 36.00 ATOM 185 O CYS S1026 -22.828 22.251 50.324 1.00 34.75 ATOM 186 CB CYS S1026 -21.457 20.888 47.778 1.00 31.63 ATOM 187 SG CYS S1026 -20.723 21.085 46.117 1.00 30.49 ATOM 188 N VLM S1027 -24.110 20.524 49.672 1.00 38.15 ATOM 189 CA VLM S1027 -24.625 20.300 51.016 1.00 40.17 ATOM 190 C VLM S1027 -24.810 18.821 51.343 1.00 39.89 ATOM 191 O VLM S1027 -25.164 18.049 50.427 1.00 39.20 ATOM 192 CB VLM S1027 -25.972 21.032 51.207 1.00 42.13 ATOM 193 CG1 VLM S1027 -26.534 20.753 52.600 1.00 44.32 ATOM 194 CG2 VLM S1027 -25.770 22.533 51.016 1.00 42.81 ATOM 195 NT VLM S1027 -24.611 18.461 52.525 1.00 39.23 TER