HEADER Viral protein/Immune system 25-FEB-05 1YYL TITLE crystal structure of CD4M33, 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: CD4M33, scorpion-toxin mimic of CD4; COMPND 3 CHAIN: M, S; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.75 ANGSTORMS MODRES 1YYL 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 LYS CYS ALA GLY SER PHE CYS ALA CYS SEQRES 3 M 27 VLM ATOM 1 CA MPT M 1 43.914 7.909 36.606 1.00 29.68 ATOM 2 C MPT M 1 44.161 8.772 35.400 1.00 30.55 ATOM 3 O MPT M 1 45.229 8.704 34.792 1.00 31.13 ATOM 4 CB MPT M 1 43.488 8.710 37.820 1.00 29.28 ATOM 5 SG MPT M 1 44.583 10.078 38.363 1.00 31.76 ATOM 6 N ASN M 2 43.173 9.580 35.040 1.00 30.71 ATOM 7 CA ASN M 2 43.302 10.493 33.887 1.00 32.37 ATOM 8 C ASN M 2 43.822 11.811 34.487 1.00 32.60 ATOM 9 O ASN M 2 43.237 12.881 34.304 1.00 32.83 ATOM 10 CB ASN M 2 41.929 10.698 33.249 1.00 35.25 ATOM 11 CG ASN M 2 42.014 11.015 31.777 1.00 37.16 ATOM 12 OD1 ASN M 2 42.616 12.025 31.371 1.00 37.52 ATOM 13 ND2 ASN M 2 41.412 10.156 30.957 1.00 37.91 ATOM 14 N LEU M 3 44.934 11.680 35.202 1.00 33.40 ATOM 15 CA LEU M 3 45.625 12.764 35.961 1.00 34.47 ATOM 16 C LEU M 3 45.360 14.201 35.466 1.00 35.29 ATOM 17 O LEU M 3 45.145 15.093 36.287 1.00 35.18 ATOM 18 CB LEU M 3 47.132 12.507 35.997 1.00 32.86 ATOM 19 CG LEU M 3 47.890 13.358 37.015 1.00 31.20 ATOM 20 CD1 LEU M 3 47.225 13.260 38.379 1.00 30.55 ATOM 21 CD2 LEU M 3 49.322 12.879 37.091 1.00 31.74 ATOM 22 N HIS M 4 45.371 14.437 34.161 1.00 36.89 ATOM 23 CA HIS M 4 45.169 15.814 33.670 1.00 38.16 ATOM 24 C HIS M 4 43.769 16.337 34.053 1.00 37.83 ATOM 25 O HIS M 4 43.650 17.434 34.598 1.00 39.36 ATOM 26 CB HIS M 4 45.368 15.883 32.158 1.00 42.12 ATOM 27 CG HIS M 4 45.896 17.205 31.683 1.00 47.74 ATOM 28 ND1 HIS M 4 45.185 18.381 31.806 1.00 49.79 ATOM 29 CD2 HIS M 4 47.076 17.537 31.104 1.00 49.67 ATOM 30 CE1 HIS M 4 45.903 19.380 31.324 1.00 51.17 ATOM 31 NE2 HIS M 4 47.055 18.895 30.893 1.00 51.37 ATOM 32 N PHE M 5 42.721 15.567 33.781 1.00 36.73 ATOM 33 CA PHE M 5 41.345 16.023 34.112 1.00 36.08 ATOM 34 C PHE M 5 41.083 15.845 35.610 1.00 35.77 ATOM 35 O PHE M 5 40.164 16.456 36.170 1.00 35.82 ATOM 36 CB PHE M 5 40.319 15.245 33.299 1.00 37.41 ATOM 37 CG PHE M 5 40.488 15.421 31.826 1.00 39.85 ATOM 38 CD1 PHE M 5 41.582 14.861 31.171 1.00 40.26 ATOM 39 CD2 PHE M 5 39.600 16.214 31.103 1.00 40.79 ATOM 40 CE1 PHE M 5 41.795 15.090 29.818 1.00 41.20 ATOM 41 CE2 PHE M 5 39.801 16.451 29.749 1.00 41.14 ATOM 42 CZ PHE M 5 40.903 15.889 29.104 1.00 41.89 ATOM 43 N CYS M 6 41.895 15.009 36.249 1.00 34.43 ATOM 44 CA CYS M 6 41.762 14.763 37.691 1.00 31.60 ATOM 45 C CYS M 6 42.202 16.051 38.413 1.00 31.90 ATOM 46 O CYS M 6 41.478 16.574 39.265 1.00 31.01 ATOM 47 CB CYS M 6 42.645 13.583 38.093 1.00 29.70 ATOM 48 SG CYS M 6 42.620 13.160 39.865 1.00 29.57 ATOM 49 N GLN M 7 43.375 16.560 38.046 1.00 32.37 ATOM 50 CA GLN M 7 43.914 17.789 38.667 1.00 33.84 ATOM 51 C GLN M 7 42.973 18.953 38.352 1.00 34.71 ATOM 52 O GLN M 7 42.695 19.793 39.209 1.00 35.05 ATOM 53 CB GLN M 7 45.301 18.102 38.118 1.00 34.56 ATOM 54 CG GLN M 7 46.269 16.951 38.249 1.00 38.75 ATOM 55 CD GLN M 7 47.620 17.240 37.624 1.00 41.03 ATOM 56 OE1 GLN M 7 47.706 17.867 36.554 1.00 41.21 ATOM 57 NE2 GLN M 7 48.687 16.767 38.272 1.00 40.79 ATOM 58 N LEU M 8 42.476 18.998 37.125 1.00 34.55 ATOM 59 CA LEU M 8 41.585 20.091 36.742 1.00 35.02 ATOM 60 C LEU M 8 40.292 20.073 37.596 1.00 34.98 ATOM 61 O LEU M 8 39.879 21.106 38.119 1.00 33.96 ATOM 62 CB LEU M 8 41.264 20.008 35.255 1.00 35.80 ATOM 63 CG LEU M 8 41.934 21.171 34.514 1.00 38.13 ATOM 64 CD1 LEU M 8 42.983 20.659 33.514 1.00 37.77 ATOM 65 CD2 LEU M 8 40.851 21.999 33.823 1.00 37.77 ATOM 66 N ARG M 9 39.670 18.910 37.750 1.00 35.84 ATOM 67 CA ARG M 9 38.416 18.833 38.547 1.00 36.61 ATOM 68 C ARG M 9 38.690 19.227 40.012 1.00 35.04 ATOM 69 O ARG M 9 38.076 20.155 40.542 1.00 35.00 ATOM 70 CB ARG M 9 37.832 17.423 38.525 1.00 38.73 ATOM 71 CG ARG M 9 36.584 17.292 39.384 1.00 43.65 ATOM 72 CD ARG M 9 35.401 17.996 38.741 1.00 47.84 ATOM 73 NE ARG M 9 34.494 17.047 38.094 1.00 51.83 ATOM 74 CZ ARG M 9 33.706 17.345 37.065 1.00 53.50 ATOM 75 NH1 ARG M 9 33.716 18.572 36.557 1.00 55.46 ATOM 76 NH2 ARG M 9 32.914 16.415 36.542 1.00 53.68 ATOM 77 N CYS M 10 39.602 18.502 40.653 1.00 33.46 ATOM 78 CA CYS M 10 39.958 18.756 42.066 1.00 31.06 ATOM 79 C CYS M 10 40.320 20.251 42.253 1.00 30.69 ATOM 80 O CYS M 10 39.683 20.948 43.049 1.00 30.34 ATOM 81 CB CYS M 10 41.150 17.879 42.489 1.00 30.66 ATOM 82 SG CYS M 10 40.849 16.082 42.671 1.00 28.02 ATOM 83 N LYS M 11 41.327 20.718 41.510 1.00 30.21 ATOM 84 CA LYS M 11 41.836 22.131 41.584 1.00 29.58 ATOM 85 C LYS M 11 40.687 23.146 41.516 1.00 27.59 ATOM 86 O LYS M 11 40.768 24.222 42.098 1.00 26.04 ATOM 87 CB LYS M 11 42.805 22.420 40.434 1.00 31.26 ATOM 88 CG LYS M 11 43.524 23.764 40.555 1.00 32.26 ATOM 89 CD LYS M 11 44.804 23.657 41.377 1.00 32.92 ATOM 90 CE LYS M 11 45.886 22.910 40.602 1.00 34.68 ATOM 91 NZ LYS M 11 47.215 22.915 41.291 1.00 37.01 ATOM 92 N SER M 12 39.643 22.801 40.776 1.00 26.25 ATOM 93 CA SER M 12 38.472 23.675 40.626 1.00 24.77 ATOM 94 C SER M 12 37.784 23.804 41.995 1.00 25.03 ATOM 95 O SER M 12 37.024 24.741 42.231 1.00 25.34 ATOM 96 CB SER M 12 37.506 23.069 39.596 1.00 24.38 ATOM 97 OG SER M 12 36.210 22.863 40.131 1.00 22.93 ATOM 98 N LEU M 13 38.074 22.869 42.893 1.00 25.16 ATOM 99 CA LEU M 13 37.450 22.860 44.234 1.00 26.28 ATOM 100 C LEU M 13 38.508 23.137 45.308 1.00 28.35 ATOM 101 O LEU M 13 38.316 22.799 46.488 1.00 28.60 ATOM 102 CB LEU M 13 36.802 21.501 44.478 1.00 26.41 ATOM 103 CG LEU M 13 35.651 21.184 43.522 1.00 25.95 ATOM 104 CD1 LEU M 13 35.521 19.692 43.327 1.00 25.97 ATOM 105 CD2 LEU M 13 34.369 21.784 44.067 1.00 25.23 ATOM 106 N GLY M 14 39.616 23.744 44.887 1.00 29.65 ATOM 107 CA GLY M 14 40.699 24.078 45.801 1.00 29.21 ATOM 108 C GLY M 14 41.397 22.908 46.469 1.00 28.68 ATOM 109 O GLY M 14 41.647 22.926 47.681 1.00 29.17 ATOM 110 N LEU M 15 41.722 21.890 45.688 1.00 27.62 ATOM 111 CA LEU M 15 42.402 20.702 46.230 1.00 28.77 ATOM 112 C LEU M 15 43.396 20.221 45.174 1.00 29.22 ATOM 113 O LEU M 15 43.384 20.694 44.038 1.00 29.34 ATOM 114 CB LEU M 15 41.382 19.593 46.513 1.00 29.44 ATOM 115 CG LEU M 15 40.335 19.805 47.617 1.00 30.29 ATOM 116 CD1 LEU M 15 39.128 18.907 47.365 1.00 29.55 ATOM 117 CD2 LEU M 15 40.956 19.522 48.987 1.00 28.87 ATOM 118 N LEU M 16 44.266 19.298 45.554 1.00 30.06 ATOM 119 CA LEU M 16 45.225 18.755 44.585 1.00 31.71 ATOM 120 C LEU M 16 44.662 17.417 44.114 1.00 31.82 ATOM 121 O LEU M 16 43.964 16.725 44.862 1.00 31.56 ATOM 122 CB LEU M 16 46.604 18.544 45.215 1.00 33.13 ATOM 123 CG LEU M 16 47.430 19.795 45.537 1.00 35.44 ATOM 124 CD1 LEU M 16 48.769 19.357 46.128 1.00 35.27 ATOM 125 CD2 LEU M 16 47.641 20.649 44.275 1.00 34.13 ATOM 126 N GLY M 17 44.956 17.074 42.869 1.00 31.53 ATOM 127 CA GLY M 17 44.481 15.821 42.325 1.00 30.06 ATOM 128 C GLY M 17 45.642 14.881 42.100 1.00 28.96 ATOM 129 O GLY M 17 46.645 15.260 41.501 1.00 29.03 ATOM 130 N LYS M 18 45.515 13.657 42.598 1.00 28.37 ATOM 131 CA LYS M 18 46.567 12.637 42.433 1.00 26.69 ATOM 132 C LYS M 18 45.869 11.337 42.044 1.00 25.61 ATOM 133 O LYS M 18 44.672 11.170 42.268 1.00 25.57 ATOM 134 CB LYS M 18 47.337 12.418 43.743 1.00 27.09 ATOM 135 CG LYS M 18 46.501 11.853 44.879 1.00 27.83 ATOM 136 CD LYS M 18 47.354 11.444 46.085 1.00 29.96 ATOM 137 CE LYS M 18 48.204 10.206 45.794 1.00 30.55 ATOM 138 NZ LYS M 18 48.834 9.616 47.022 1.00 28.20 ATOM 139 N CYS M 19 46.618 10.426 41.449 1.00 24.34 ATOM 140 CA CYS M 19 46.039 9.143 41.083 1.00 22.85 ATOM 141 C CYS M 19 46.166 8.229 42.307 1.00 21.52 ATOM 142 O CYS M 19 47.124 8.304 43.078 1.00 22.44 ATOM 143 CB CYS M 19 46.777 8.534 39.889 1.00 24.47 ATOM 144 SG CYS M 19 46.491 9.359 38.278 1.00 30.10 ATOM 145 N ALA M 20 45.159 7.399 42.497 1.00 20.70 ATOM 146 CA ALA M 20 45.132 6.417 43.597 1.00 18.78 ATOM 147 C ALA M 20 44.755 5.114 42.884 1.00 17.86 ATOM 148 O ALA M 20 43.579 4.789 42.737 1.00 16.96 ATOM 149 CB ALA M 20 44.071 6.802 44.625 1.00 19.22 ATOM 150 N GLY M 21 45.766 4.387 42.426 1.00 17.51 ATOM 151 CA GLY M 21 45.498 3.181 41.677 1.00 17.58 ATOM 152 C GLY M 21 45.128 3.734 40.319 1.00 17.13 ATOM 153 O GLY M 21 45.777 4.664 39.842 1.00 16.49 ATOM 154 N SER M 22 44.091 3.191 39.696 1.00 17.51 ATOM 155 CA SER M 22 43.650 3.699 38.370 1.00 18.28 ATOM 156 C SER M 22 42.488 4.677 38.639 1.00 18.06 ATOM 157 O SER M 22 41.692 4.992 37.754 1.00 18.20 ATOM 158 CB SER M 22 43.172 2.537 37.496 1.00 18.83 ATOM 159 OG SER M 22 42.182 1.776 38.172 1.00 20.32 ATOM 160 N BIF M 23 42.429 5.150 39.879 1.00 17.04 ATOM 161 CA BIF M 23 41.374 6.064 40.336 1.00 16.09 ATOM 162 C BIF M 23 41.938 7.474 40.482 1.00 16.94 ATOM 163 CB BIF M 23 40.859 5.580 41.687 1.00 14.13 ATOM 164 CG BIF M 23 39.957 4.346 41.752 1.00 11.97 ATOM 165 CD2 BIF M 23 40.243 3.356 42.709 1.00 13.03 ATOM 166 CE2 BIF M 23 39.428 2.220 42.836 1.00 12.65 ATOM 167 CZ BIF M 23 38.276 2.020 41.999 1.00 11.27 ATOM 168 CE1 BIF M 23 38.012 3.058 41.012 1.00 11.37 ATOM 169 CD1 BIF M 23 38.842 4.199 40.893 1.00 10.44 ATOM 170 C8 BIF M 23 36.301 -0.738 43.673 1.00 12.70 ATOM 171 C9 BIF M 23 35.707 -1.361 42.559 1.00 13.90 ATOM 172 C10 BIF M 23 35.956 -0.885 41.253 1.00 13.46 ATOM 173 C11 BIF M 23 36.805 0.226 41.055 1.00 12.61 ATOM 174 C12 BIF M 23 37.438 0.895 42.159 1.00 11.00 ATOM 175 C13 BIF M 23 37.150 0.369 43.480 1.00 11.58 ATOM 176 O BIF M 23 43.142 7.688 40.402 1.00 17.89 ATOM 177 N CYS M 24 41.047 8.422 40.739 1.00 16.94 ATOM 178 CA CYS M 24 41.444 9.825 40.915 1.00 18.59 ATOM 179 C CYS M 24 40.959 10.284 42.294 1.00 17.62 ATOM 180 O CYS M 24 39.808 10.083 42.650 1.00 17.17 ATOM 181 CB CYS M 24 40.824 10.678 39.814 1.00 21.17 ATOM 182 SG CYS M 24 40.740 12.454 40.194 1.00 30.20 ATOM 183 N ALA M 25 41.847 10.896 43.067 1.00 17.90 ATOM 184 CA ALA M 25 41.484 11.356 44.426 1.00 18.57 ATOM 185 C ALA M 25 41.994 12.781 44.621 1.00 18.80 ATOM 186 O ALA M 25 42.977 13.180 44.014 1.00 18.47 ATOM 187 CB ALA M 25 42.096 10.433 45.475 1.00 16.57 ATOM 188 N CYS M 26 41.303 13.538 45.464 1.00 21.56 ATOM 189 CA CYS M 26 41.691 14.935 45.761 1.00 23.97 ATOM 190 C CYS M 26 42.240 14.931 47.184 1.00 24.28 ATOM 191 O CYS M 26 41.590 14.427 48.096 1.00 25.04 ATOM 192 CB CYS M 26 40.482 15.884 45.716 1.00 25.22 ATOM 193 SG CYS M 26 39.490 15.945 44.184 1.00 28.55 ATOM 194 N VLM M 27 43.430 15.484 47.369 1.00 24.73 ATOM 195 CA VLM M 27 44.023 15.541 48.714 1.00 25.95 ATOM 196 C VLM M 27 44.084 17.023 49.160 1.00 27.32 ATOM 197 O VLM M 27 44.060 17.920 48.283 1.00 26.44 ATOM 198 CB VLM M 27 45.432 14.928 48.718 1.00 25.36 ATOM 199 CG1 VLM M 27 46.133 15.239 50.021 1.00 25.88 ATOM 200 CG2 VLM M 27 45.328 13.422 48.532 1.00 25.44 ATOM 201 NT VLM M 27 44.149 17.249 50.388 1.00 28.46 TER