HEADER SWEET TASTING PROTEIN 24-MAY-89 1THI TITLE CRYSTAL STRUCTURES OF TWO INTENSELY SWEET PROTEINS COMPND MOL_ID: 1; COMPND 2 MOLECULE: THAUMATIN I; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 3.20 ANGSTORMS DBREF 1THI A 1 207 UNP P02883 THM1_THADA 1 207 SEQRES 1 A 127 ALA THR PHE GLU ILE VAL ASN ARG CYS SER TYR THR VAL SEQRES 2 A 127 TRP ALA ALA ALA SER LYS GLY ASP ALA ALA LEU ASP ALA SEQRES 3 A 127 GLY GLY ARG GLN LEU ASN SER GLY GLU SER TRP THR ILE SEQRES 4 A 127 ASN VAL GLU PRO GLY THR ASN GLY GLY LYS ILE TRP ALA SEQRES 5 A 127 ARG THR ASP CYS TYR PHE ASP ASP SER GLY SER GLY ILE SEQRES 6 A 127 CYS LYS THR GLY ASP CYS GLY GLY LEU LEU ARG CYS LYS SEQRES 7 A 127 ARG PHE GLY ARG PRO PRO THR THR LEU ALA GLU PHE SER SEQRES 8 A 127 LEU ASN GLN TYR GLY LYS ASP TYR ILE ASP ILE SER ASN SEQRES 9 A 127 ILE LYS GLY PHE ASN VAL PRO MET ASN PHE SER PRO THR SEQRES 10 A 127 THR ARG GLY CYS ARG GLY VAL ARG CYS ALA SEQRES 1 A 29 ASP ALA PHE SER TYR VAL LEU ASP LYS PRO THR THR VAL SEQRES 2 A 29 THR CYS PRO GLY SER SER ASN TYR ARG VAL THR PHE CYS SEQRES 3 A 29 PRO THR ALA ATOM 1 CA ALA A 1 26.785 37.246 22.194 1.00 17.70 ATOM 2 CA THR A 2 24.688 38.753 19.701 1.00 17.70 ATOM 3 CA PHE A 3 21.266 37.890 19.360 1.00 17.70 ATOM 4 CA GLU A 4 20.042 39.285 16.511 1.00 17.70 ATOM 5 CA ILE A 5 16.472 38.903 16.178 1.00 17.70 ATOM 6 CA VAL A 6 14.659 39.107 12.877 1.00 17.70 ATOM 7 CA ASN A 7 11.018 38.968 11.799 1.00 17.70 ATOM 8 CA ARG A 8 10.709 38.110 8.049 1.00 17.70 ATOM 9 CA CYS A 9 7.190 37.944 8.487 1.00 17.70 ATOM 10 CA SER A 10 3.571 39.177 8.511 1.00 17.70 ATOM 11 CA TYR A 11 3.558 40.025 12.248 1.00 17.70 ATOM 12 CA THR A 12 4.983 42.742 14.707 1.00 17.70 ATOM 13 CA VAL A 13 6.521 40.645 17.168 1.00 17.70 ATOM 14 CA TRP A 14 7.653 41.514 20.777 1.00 17.70 ATOM 15 CA ALA A 15 10.762 39.690 22.111 1.00 17.70 ATOM 16 CA ALA A 16 12.368 38.450 25.327 1.00 17.70 ATOM 17 CA ALA A 17 15.200 37.774 27.488 1.00 17.70 ATOM 18 CA SER A 18 14.531 36.329 31.137 1.00 17.70 ATOM 19 CA LYS A 19 15.241 33.547 34.320 1.00 17.70 ATOM 20 CA GLY A 20 14.822 34.863 37.905 1.00 17.70 ATOM 21 CA ASP A 21 15.244 38.735 38.159 1.00 17.70 ATOM 22 CA ALA A 22 16.096 41.670 35.892 1.00 17.70 ATOM 23 CA ALA A 23 15.598 41.276 32.061 1.00 17.70 ATOM 24 CA LEU A 24 17.989 40.047 29.499 1.00 17.70 ATOM 25 CA ASP A 25 16.271 42.533 27.577 1.00 17.70 ATOM 26 CA ALA A 26 14.335 45.684 26.810 1.00 17.70 ATOM 27 CA GLY A 27 11.195 46.001 24.551 1.00 17.70 ATOM 28 CA GLY A 28 11.011 44.155 21.157 1.00 17.70 ATOM 29 CA ARG A 29 8.868 46.123 18.633 1.00 17.70 ATOM 30 CA GLN A 30 9.880 44.180 15.567 1.00 17.70 ATOM 31 CA LEU A 31 7.538 45.103 12.972 1.00 17.70 ATOM 32 CA ASN A 32 9.979 43.059 10.601 1.00 17.70 ATOM 33 CA SER A 33 12.847 45.097 11.728 1.00 17.70 ATOM 34 CA GLY A 34 16.002 43.806 13.023 1.00 17.70 ATOM 35 CA GLU A 35 16.845 43.729 16.806 1.00 17.70 ATOM 36 CA SER A 36 20.343 42.819 17.514 1.00 17.70 ATOM 37 CA TRP A 37 21.721 43.422 20.771 1.00 17.70 ATOM 38 CA THR A 38 23.949 42.099 23.127 1.00 17.70 ATOM 39 CA ILE A 39 23.586 39.584 25.988 1.00 17.70 ATOM 40 CA ASN A 40 25.457 40.393 29.402 1.00 17.70 ATOM 41 CA VAL A 41 29.112 39.201 29.362 1.00 17.70 ATOM 42 CA GLU A 42 28.562 35.603 29.361 1.00 17.70 ATOM 43 CA PRO A 43 25.849 34.687 31.704 1.00 17.70 ATOM 44 CA GLY A 44 23.257 32.014 30.861 1.00 17.70 ATOM 45 CA THR A 45 20.463 30.323 32.642 1.00 17.70 ATOM 46 CA ASN A 46 18.639 32.139 29.933 1.00 17.70 ATOM 47 CA GLY A 47 16.662 31.761 28.140 1.00 17.70 ATOM 48 CA GLY A 48 14.777 34.299 26.300 1.00 17.70 ATOM 49 CA LYS A 49 14.120 35.758 22.861 1.00 17.70 ATOM 50 CA ILE A 50 10.475 34.686 22.233 1.00 17.70 ATOM 51 CA TRP A 51 9.253 36.710 19.220 1.00 17.70 ATOM 52 CA ALA A 52 6.198 35.078 20.353 1.00 17.70 ATOM 53 CA ARG A 53 4.211 38.063 21.704 1.00 17.70 ATOM 54 CA THR A 54 2.006 38.559 18.943 1.00 17.70 ATOM 55 CA ASP A 55 -1.132 40.696 19.322 1.00 17.70 ATOM 56 CA CYS A 56 -0.100 43.365 22.048 1.00 17.70 ATOM 57 CA TYR A 57 -1.835 46.514 22.770 1.00 17.70 ATOM 58 CA PHE A 58 0.421 49.001 24.617 1.00 17.70 ATOM 59 CA ASP A 59 1.437 52.530 25.150 1.00 17.70 ATOM 60 CA ASP A 60 4.825 51.765 26.875 1.00 17.70 ATOM 61 CA SER A 61 4.376 50.350 30.272 1.00 17.70 ATOM 62 CA GLY A 62 1.176 49.415 28.405 1.00 17.70 ATOM 63 CA SER A 63 -0.719 46.071 28.681 1.00 17.70 ATOM 64 CA GLY A 64 -3.234 44.541 26.136 1.00 17.70 ATOM 65 CA ILE A 65 -0.588 41.863 26.823 1.00 17.70 ATOM 66 CA CYS A 66 -0.645 40.720 23.270 1.00 17.70 ATOM 67 CA LYS A 67 -3.135 37.811 23.105 1.00 17.70 ATOM 68 CA THR A 68 -0.212 35.392 23.077 1.00 17.70 ATOM 69 CA GLY A 69 1.823 35.059 26.107 1.00 17.70 ATOM 70 CA ASP A 70 5.251 36.248 27.266 1.00 17.70 ATOM 71 CA CYS A 71 5.742 38.789 30.175 1.00 17.70 ATOM 72 CA GLY A 72 3.235 40.727 32.310 1.00 17.70 ATOM 73 CA GLY A 73 2.710 43.505 31.862 1.00 17.70 ATOM 74 CA LEU A 74 5.613 45.575 30.290 1.00 17.70 ATOM 75 CA LEU A 75 6.967 46.179 26.656 1.00 17.70 ATOM 76 CA ARG A 76 10.551 46.186 27.881 1.00 17.70 ATOM 77 CA CYS A 77 9.536 42.722 29.127 1.00 17.70 ATOM 78 CA LYS A 78 11.015 43.083 32.722 1.00 17.70 ATOM 79 CA ARG A 79 11.324 40.017 35.081 1.00 17.70 ATOM 80 CA PHE A 80 13.242 36.898 34.729 1.00 17.70 ATOM 81 CA GLY A 81 10.279 34.459 35.001 1.00 17.70 ATOM 82 CA ARG A 82 8.503 35.922 31.898 1.00 17.70 ATOM 83 CA PRO A 83 5.919 34.491 29.407 1.00 17.70 ATOM 84 CA PRO A 84 2.450 34.188 30.869 1.00 17.70 ATOM 85 CA THR A 85 2.740 31.433 28.399 1.00 17.70 ATOM 86 CA THR A 86 1.844 30.387 24.896 1.00 17.70 ATOM 87 CA LEU A 87 5.334 30.967 23.423 1.00 17.70 ATOM 88 CA ALA A 88 8.354 29.150 22.113 1.00 17.70 ATOM 89 CA GLU A 89 12.418 29.423 22.606 1.00 17.70 ATOM 90 CA PHE A 90 15.299 28.495 25.241 1.00 17.70 ATOM 91 CA SER A 91 19.339 29.043 25.347 1.00 17.70 ATOM 92 CA LEU A 92 22.552 30.171 27.098 1.00 17.70 ATOM 93 CA ASN A 93 26.484 31.003 26.893 1.00 17.70 ATOM 94 CA GLN A 94 29.862 29.998 28.323 1.00 17.70 ATOM 95 CA TYR A 95 27.828 28.776 31.291 1.00 17.70 ATOM 96 CA GLY A 96 30.173 25.978 31.920 1.00 17.70 ATOM 97 CA LYS A 97 31.861 26.708 29.516 1.00 17.70 ATOM 98 CA ASP A 98 30.807 26.213 25.961 1.00 17.70 ATOM 99 CA TYR A 99 27.026 26.040 24.939 1.00 17.70 ATOM 100 CA ILE A 100 23.317 24.901 25.413 1.00 17.70 ATOM 101 CA ASP A 101 20.778 26.643 22.971 1.00 17.70 ATOM 102 CA ILE A 102 17.347 25.242 22.442 1.00 17.70 ATOM 103 CA SER A 103 14.304 25.959 20.310 1.00 17.70 ATOM 104 CA ASN A 104 11.476 24.700 22.896 1.00 17.70 ATOM 105 CA ILE A 105 8.429 23.368 21.846 1.00 17.70 ATOM 106 CA LYS A 106 5.795 25.624 21.607 1.00 17.70 ATOM 107 CA GLY A 107 6.118 26.342 17.645 1.00 17.70 ATOM 108 CA PHE A 108 3.798 29.562 17.801 1.00 17.70 ATOM 109 CA ASN A 109 5.191 32.591 15.863 1.00 17.70 ATOM 110 CA VAL A 110 7.605 30.298 14.153 1.00 17.70 ATOM 111 CA PRO A 111 11.043 29.476 15.700 1.00 17.70 ATOM 112 CA MET A 112 14.844 29.615 14.776 1.00 17.70 ATOM 113 CA ASN A 113 18.137 30.902 15.381 1.00 17.70 ATOM 114 CA PHE A 114 21.216 29.523 14.330 1.00 17.70 ATOM 115 CA SER A 115 24.742 29.617 14.209 1.00 17.70 ATOM 116 CA PRO A 116 26.628 32.538 13.170 1.00 17.70 ATOM 117 CA THR A 117 29.811 30.662 13.191 1.00 17.70 ATOM 118 CA THR A 118 30.457 27.551 11.620 1.00 17.70 ATOM 119 CA ARG A 119 30.726 24.567 13.513 1.00 17.70 ATOM 120 CA GLY A 120 27.915 26.778 14.578 1.00 17.70 ATOM 121 CA CYS A 121 26.376 23.940 16.135 1.00 17.70 ATOM 122 CA ARG A 122 23.865 22.847 13.603 1.00 17.70 ATOM 123 CA GLY A 123 20.892 25.244 13.170 1.00 17.70 ATOM 124 CA VAL A 124 17.782 24.962 15.286 1.00 17.70 ATOM 125 CA ARG A 125 14.270 25.531 14.392 1.00 17.70 ATOM 126 CA CYS A 126 10.630 24.386 14.470 1.00 17.70 ATOM 127 CA ALA A 127 8.512 25.926 11.750 1.00 17.70 TER ATOM 1 CA ASP A 179 14.970 18.862 17.591 1.00 17.70 ATOM 2 CA ALA A 180 12.527 21.103 19.881 1.00 17.70 ATOM 3 CA PHE A 181 11.823 20.020 23.473 1.00 17.70 ATOM 4 CA SER A 182 8.326 19.056 23.977 1.00 17.70 ATOM 5 CA TYR A 183 8.057 18.753 27.935 1.00 17.70 ATOM 6 CA VAL A 184 10.771 18.655 30.497 1.00 17.70 ATOM 7 CA LEU A 185 12.368 15.181 30.654 1.00 17.70 ATOM 8 CA ASP A 186 12.647 13.598 27.163 1.00 17.70 ATOM 9 CA LYS A 187 15.583 13.159 24.527 1.00 17.70 ATOM 10 CA PRO A 188 17.664 16.461 23.945 1.00 17.70 ATOM 11 CA THR A 189 18.170 18.821 21.168 1.00 17.70 ATOM 12 CA THR A 190 20.589 20.921 22.573 1.00 17.70 ATOM 13 CA VAL A 191 23.093 22.468 20.337 1.00 17.70 ATOM 14 CA THR A 192 26.496 22.669 21.906 1.00 17.70 ATOM 15 CA CYS A 193 28.920 24.125 19.557 1.00 17.70 ATOM 16 CA PRO A 194 31.143 27.191 20.573 1.00 17.70 ATOM 17 CA GLY A 195 30.961 30.407 22.674 1.00 17.70 ATOM 18 CA SER A 196 32.747 32.212 21.256 1.00 17.70 ATOM 19 CA SER A 197 29.262 33.287 20.532 1.00 17.70 ATOM 20 CA ASN A 198 26.691 34.831 18.485 1.00 17.70 ATOM 21 CA TYR A 199 23.548 33.096 17.355 1.00 17.70 ATOM 22 CA ARG A 200 21.049 34.034 14.544 1.00 17.70 ATOM 23 CA VAL A 201 17.305 34.988 15.036 1.00 17.70 ATOM 24 CA THR A 202 14.033 34.352 12.906 1.00 17.70 ATOM 25 CA PHE A 203 10.556 34.919 12.815 1.00 17.70 ATOM 26 CA CYS A 204 9.152 33.196 9.791 1.00 17.70 ATOM 27 CA PRO A 205 12.136 31.194 8.783 1.00 17.70 ATOM 28 CA THR A 206 12.633 30.084 5.181 1.00 17.70 ATOM 29 CA ALA A 207 16.256 29.962 3.966 1.00 17.70 TER