HEADER VIRAL PROTEIN/IMMUNE SYSTEM 25-NOV-15 3JCB TITLE Structure of Simian Immunodeficiency Virus Envelope Spikes bound with TITLE 2 CD4 and Monoclonal Antibody 36D5 COMPND MOL_ID: 1; COMPND 2 MOLECULE: Envelope glycoprotein gp120; COMPND 3 CHAIN: A, E, I; COMPND 4 FRAGMENT: SEE REMARK ; EXPDTA ELECTRON MICROSCOPY DBREF 3JCB A 44 493 PDB 3JCB 3JCB 44 493 SEQRES 1 A 51 VAL LYS LEU THR PRO LEU CYS VAL THR LEU GLN CYS THR SEQRES 2 A 51 ASN VAL THR ASN ASN ILE THR ASP ASP MET ARG GLY GLU SEQRES 3 A 51 LEU LYS ASN CYS SER PHE ASN MET THR THR GLU LEU ARG SEQRES 4 A 51 ASP LYS LYS GLN LYS VAL TYR SER LEU PHE TYR ARG SEQRES 1 A 12 TYR ARG LEU ILE ASN CYS ASN THR SER ALA ILE THR ATOM 1 N TYR A 191 -22.679 -13.107 48.439 1.00303.24 ATOM 2 CA TYR A 191 -21.564 -13.863 47.884 1.00308.86 ATOM 3 C TYR A 191 -20.414 -12.915 47.565 1.00293.32 ATOM 4 O TYR A 191 -20.636 -11.782 47.151 1.00287.24 ATOM 5 CB TYR A 191 -22.017 -14.572 46.608 1.00318.82 ATOM 6 N ARG A 192 -19.182 -13.372 47.764 1.00250.70 ATOM 7 CA ARG A 192 -18.018 -12.517 47.537 1.00243.10 ATOM 8 C ARG A 192 -17.098 -13.005 46.414 1.00225.23 ATOM 9 O ARG A 192 -17.350 -14.042 45.798 1.00216.32 ATOM 10 CB ARG A 192 -17.219 -12.370 48.835 1.00246.94 ATOM 11 N LEU A 193 -16.047 -12.226 46.150 1.00184.28 ATOM 12 CA LEU A 193 -14.925 -12.625 45.291 1.00177.34 ATOM 13 C LEU A 193 -15.354 -12.940 43.860 1.00181.79 ATOM 14 O LEU A 193 -15.985 -12.097 43.212 1.00180.90 ATOM 15 CB LEU A 193 -14.254 -13.869 45.871 1.00176.58 ATOM 16 N ILE A 194 -14.931 -14.120 43.383 1.00253.83 ATOM 17 CA ILE A 194 -15.348 -14.747 42.117 1.00250.57 ATOM 18 C ILE A 194 -14.669 -14.202 40.852 1.00250.62 ATOM 19 O ILE A 194 -14.281 -14.986 39.984 1.00246.35 ATOM 20 CB ILE A 194 -16.877 -14.620 41.928 1.00249.48 ATOM 21 N ASN A 195 -14.553 -12.877 40.752 1.00214.66 ATOM 22 CA ASN A 195 -13.953 -12.179 39.607 1.00213.15 ATOM 23 C ASN A 195 -14.144 -12.812 38.225 1.00210.48 ATOM 24 O ASN A 195 -15.180 -13.401 37.914 1.00204.68 ATOM 25 CB ASN A 195 -12.445 -12.057 39.859 1.00209.56 ATOM 26 N CYS A 196 -13.125 -12.634 37.393 1.00371.58 ATOM 27 CA CYS A 196 -13.115 -13.089 36.008 1.00364.78 ATOM 28 C CYS A 196 -11.966 -14.081 35.859 1.00360.13 ATOM 29 O CYS A 196 -11.058 -14.088 36.686 1.00364.75 ATOM 30 CB CYS A 196 -12.954 -11.912 35.047 1.00364.87 ATOM 31 SG CYS A 196 -11.855 -10.626 35.681 1.00402.65 ATOM 32 N ASN A 197 -11.997 -14.929 34.834 1.00231.99 ATOM 33 CA ASN A 197 -10.895 -15.882 34.655 1.00225.31 ATOM 34 C ASN A 197 -9.884 -15.471 33.582 1.00227.65 ATOM 35 O ASN A 197 -10.101 -15.645 32.384 1.00224.56 ATOM 36 CB ASN A 197 -11.423 -17.293 34.363 1.00226.02 ATOM 37 CG ASN A 197 -10.641 -18.378 35.105 1.00218.43 ATOM 38 OD1 ASN A 197 -11.192 -19.088 35.947 1.00217.02 ATOM 39 ND2 ASN A 197 -9.348 -18.504 34.794 1.00219.51 ATOM 40 N THR A 198 -8.772 -14.922 34.053 1.00212.13 ATOM 41 CA THR A 198 -7.573 -14.676 33.252 1.00218.48 ATOM 42 C THR A 198 -7.682 -13.799 31.995 1.00218.00 ATOM 43 O THR A 198 -6.740 -13.778 31.201 1.00223.27 ATOM 44 CB THR A 198 -6.902 -16.015 32.848 1.00214.97 ATOM 45 N SER A 199 -8.792 -13.072 31.832 1.00 99.27 ATOM 46 CA SER A 199 -8.879 -11.941 30.892 1.00202.84 ATOM 47 C SER A 199 -10.213 -11.204 31.025 1.00202.84 ATOM 48 O SER A 199 -11.244 -11.834 31.249 1.00205.57 ATOM 49 CB SER A 199 -8.715 -12.415 29.448 1.00 95.95 ATOM 50 N ALA A 200 -10.203 -9.876 30.901 1.00270.97 ATOM 51 CA ALA A 200 -11.457 -9.138 30.752 1.00204.90 ATOM 52 C ALA A 200 -11.311 -7.834 29.971 1.00209.82 ATOM 53 O ALA A 200 -10.857 -6.833 30.514 1.00208.31 ATOM 54 CB ALA A 200 -12.087 -8.870 32.120 1.00274.16 ATOM 55 N ILE A 201 -11.735 -7.841 28.711 1.00 5.03 ATOM 56 CA ILE A 201 -11.913 -6.607 27.956 1.00 5.00 ATOM 57 C ILE A 201 -13.338 -6.099 28.134 1.00 11.49 ATOM 58 O ILE A 201 -14.295 -6.848 27.959 1.00 5.86 ATOM 59 CB ILE A 201 -11.597 -6.782 26.457 1.00 8.19 ATOM 60 N THR A 202 -13.470 -4.828 28.496 1.00 89.06 ATOM 61 CA THR A 202 -14.777 -4.212 28.699 1.00 95.57 ATOM 62 C THR A 202 -15.069 -3.183 27.614 1.00 91.83 ATOM 63 O THR A 202 -14.413 -2.144 27.546 1.00 92.44 ATOM 64 CB THR A 202 -14.870 -3.530 30.075 1.00106.06 TER