HEADER DNA BINDING PROTEIN/DNA 31-DEC-69 4GNX TITLE Structure of U. maydis Replication protein A bound to ssDNA COMPND MOL_ID: 3; COMPND 2 MOLECULE: Putative uncharacterized protein; COMPND 3 CHAIN: C, Z; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.80 ANGSTORMS DBREF 4GNX C 180 623 UNP Q4P407 Q4P407_USTM 180 623 SEQRES 1 C 33 THR ALA CYS ALA SER GLU GLY CYS ASN LYS LYS VAL ASN SEQRES 2 C 33 LEU ASP HIS GLU ASN ASN TRP ARG CYS GLU LYS CYS ASP SEQRES 3 C 33 ARG SER TYR ALA THR PRO GLU ATOM 1 N THR C 488 -16.902 14.917 -0.463 1.00 42.62 ATOM 2 CA THR C 488 -17.520 14.142 -1.539 1.00 42.86 ATOM 3 C THR C 488 -16.498 13.902 -2.649 1.00 43.26 ATOM 4 O THR C 488 -15.989 14.848 -3.247 1.00 41.74 ATOM 5 CB THR C 488 -18.743 14.868 -2.140 1.00 41.80 ATOM 6 OG1 THR C 488 -18.318 16.114 -2.711 1.00 42.09 ATOM 7 CG2 THR C 488 -19.804 15.137 -1.088 1.00 41.16 ATOM 8 N ALA C 489 -16.224 12.629 -2.924 1.00 46.41 ATOM 9 CA ALA C 489 -15.136 12.223 -3.833 1.00 49.26 ATOM 10 C ALA C 489 -15.581 11.478 -5.101 1.00 51.20 ATOM 11 O ALA C 489 -16.700 10.960 -5.175 1.00 51.78 ATOM 12 CB ALA C 489 -14.093 11.408 -3.066 1.00 51.43 ATOM 13 N CYS C 490 -14.677 11.412 -6.081 1.00 54.18 ATOM 14 CA CYS C 490 -14.969 10.881 -7.414 1.00 58.07 ATOM 15 C CYS C 490 -15.201 9.385 -7.408 1.00 61.84 ATOM 16 O CYS C 490 -14.426 8.638 -6.804 1.00 65.22 ATOM 17 CB CYS C 490 -13.814 11.213 -8.352 1.00 61.60 ATOM 18 SG CYS C 490 -13.848 10.490 -10.018 1.00 66.80 ATOM 19 N ALA C 491 -16.252 8.955 -8.105 1.00 63.02 ATOM 20 CA ALA C 491 -16.623 7.536 -8.166 1.00 67.71 ATOM 21 C ALA C 491 -15.803 6.707 -9.175 1.00 74.35 ATOM 22 O ALA C 491 -16.155 5.564 -9.487 1.00 78.65 ATOM 23 CB ALA C 491 -18.119 7.391 -8.415 1.00 66.88 ATOM 24 N SER C 492 -14.702 7.275 -9.668 1.00 76.50 ATOM 25 CA SER C 492 -13.819 6.555 -10.585 1.00 83.75 ATOM 26 C SER C 492 -12.941 5.606 -9.809 1.00 88.32 ATOM 27 O SER C 492 -12.450 5.947 -8.730 1.00 85.78 ATOM 28 CB SER C 492 -12.925 7.506 -11.388 1.00 83.90 ATOM 29 OG SER C 492 -13.564 7.966 -12.567 1.00 84.57 ATOM 30 N GLU C 493 -12.758 4.414 -10.369 1.00 97.06 ATOM 31 CA GLU C 493 -11.782 3.451 -9.878 1.00102.87 ATOM 32 C GLU C 493 -10.409 4.121 -9.794 1.00101.51 ATOM 33 O GLU C 493 -9.953 4.747 -10.760 1.00103.31 ATOM 34 CB GLU C 493 -11.749 2.214 -10.797 1.00112.94 ATOM 35 CG GLU C 493 -10.593 1.241 -10.570 1.00120.57 ATOM 36 CD GLU C 493 -10.546 0.661 -9.162 1.00121.57 ATOM 37 OE1 GLU C 493 -11.576 0.707 -8.447 1.00118.31 ATOM 38 OE2 GLU C 493 -9.471 0.152 -8.767 1.00125.49 ATOM 39 N GLY C 494 -9.778 4.016 -8.628 1.00 98.31 ATOM 40 CA GLY C 494 -8.439 4.556 -8.428 1.00 97.45 ATOM 41 C GLY C 494 -8.382 6.042 -8.122 1.00 91.06 ATOM 42 O GLY C 494 -7.400 6.506 -7.530 1.00 90.54 ATOM 43 N CYS C 495 -9.430 6.780 -8.510 1.00 86.34 ATOM 44 CA CYS C 495 -9.494 8.251 -8.358 1.00 80.08 ATOM 45 C CYS C 495 -10.216 8.723 -7.078 1.00 74.69 ATOM 46 O CYS C 495 -11.274 8.185 -6.705 1.00 72.10 ATOM 47 CB CYS C 495 -10.118 8.894 -9.607 1.00 78.40 ATOM 48 SG CYS C 495 -10.101 10.706 -9.661 1.00 73.67 ATOM 49 N ASN C 496 -9.630 9.735 -6.428 1.00 72.76 ATOM 50 CA ASN C 496 -10.119 10.251 -5.141 1.00 70.47 ATOM 51 C ASN C 496 -10.345 11.762 -5.081 1.00 68.12 ATOM 52 O ASN C 496 -10.763 12.277 -4.042 1.00 65.71 ATOM 53 CB ASN C 496 -9.150 9.900 -4.004 1.00 72.14 ATOM 54 CG ASN C 496 -8.865 8.419 -3.894 1.00 76.16 ATOM 55 OD1 ASN C 496 -9.648 7.574 -4.342 1.00 77.97 ATOM 56 ND2 ASN C 496 -7.729 8.093 -3.280 1.00 78.38 ATOM 57 N LYS C 497 -10.043 12.475 -6.166 1.00 69.29 ATOM 58 CA LYS C 497 -10.185 13.936 -6.204 1.00 66.69 ATOM 59 C LYS C 497 -11.589 14.360 -5.736 1.00 61.50 ATOM 60 O LYS C 497 -12.538 13.597 -5.860 1.00 59.94 ATOM 61 CB LYS C 497 -9.842 14.467 -7.612 1.00 70.40 ATOM 62 CG LYS C 497 -10.231 15.919 -7.899 1.00 72.64 ATOM 63 CD LYS C 497 -9.486 16.955 -7.043 1.00 74.54 ATOM 64 CE LYS C 497 -10.367 18.163 -6.701 1.00 71.28 ATOM 65 NZ LYS C 497 -9.608 19.393 -6.324 1.00 73.34 ATOM 66 N LYS C 498 -11.706 15.553 -5.159 1.00 60.25 ATOM 67 CA LYS C 498 -13.008 16.101 -4.760 1.00 57.24 ATOM 68 C LYS C 498 -13.882 16.442 -5.968 1.00 56.50 ATOM 69 O LYS C 498 -13.399 17.010 -6.955 1.00 60.16 ATOM 70 CB LYS C 498 -12.832 17.355 -3.892 1.00 58.92 ATOM 71 CG LYS C 498 -14.126 17.849 -3.255 1.00 58.52 ATOM 72 CD LYS C 498 -13.976 19.181 -2.555 1.00 61.17 ATOM 73 CE LYS C 498 -15.336 19.681 -2.111 1.00 60.60 ATOM 74 NZ LYS C 498 -15.196 20.703 -1.038 1.00 63.53 ATOM 75 N VAL C 499 -15.163 16.091 -5.876 1.00 52.97 ATOM 76 CA VAL C 499 -16.167 16.424 -6.900 1.00 51.98 ATOM 77 C VAL C 499 -17.106 17.557 -6.440 1.00 50.46 ATOM 78 O VAL C 499 -17.187 17.846 -5.253 1.00 49.84 ATOM 79 CB VAL C 499 -16.994 15.179 -7.335 1.00 51.43 ATOM 80 CG1 VAL C 499 -16.101 14.159 -8.020 1.00 52.88 ATOM 81 CG2 VAL C 499 -17.743 14.547 -6.160 1.00 49.53 ATOM 82 N ASN C 500 -17.803 18.197 -7.379 1.00 51.17 ATOM 83 CA ASN C 500 -18.803 19.216 -7.050 1.00 50.18 ATOM 84 C ASN C 500 -20.033 19.092 -7.906 1.00 50.55 ATOM 85 O ASN C 500 -19.985 18.536 -9.004 1.00 51.69 ATOM 86 CB ASN C 500 -18.233 20.614 -7.197 1.00 52.55 ATOM 87 CG ASN C 500 -17.052 20.844 -6.289 1.00 54.83 ATOM 88 OD1 ASN C 500 -17.202 21.086 -5.079 1.00 55.65 ATOM 89 ND2 ASN C 500 -15.859 20.747 -6.857 1.00 56.24 ATOM 90 N LEU C 501 -21.139 19.608 -7.385 1.00 50.75 ATOM 91 CA LEU C 501 -22.388 19.681 -8.119 1.00 51.82 ATOM 92 C LEU C 501 -22.216 20.500 -9.387 1.00 56.04 ATOM 93 O LEU C 501 -21.681 21.610 -9.326 1.00 58.32 ATOM 94 CB LEU C 501 -23.455 20.327 -7.253 1.00 51.10 ATOM 95 CG LEU C 501 -24.023 19.404 -6.189 1.00 48.80 ATOM 96 CD1 LEU C 501 -24.995 20.193 -5.332 1.00 49.14 ATOM 97 CD2 LEU C 501 -24.697 18.207 -6.846 1.00 48.35 ATOM 98 N ASP C 502 -22.654 19.944 -10.525 1.00 57.37 ATOM 99 CA ASP C 502 -22.644 20.648 -11.814 1.00 60.05 ATOM 100 C ASP C 502 -23.987 21.362 -12.045 1.00 61.99 ATOM 101 O ASP C 502 -24.759 21.538 -11.106 1.00 61.13 ATOM 102 CB ASP C 502 -22.293 19.688 -12.959 1.00 61.53 ATOM 103 CG ASP C 502 -23.319 18.586 -13.147 1.00 61.26 ATOM 104 OD1 ASP C 502 -24.467 18.735 -12.683 1.00 60.49 ATOM 105 OD2 ASP C 502 -22.980 17.567 -13.783 1.00 63.03 ATOM 106 N HIS C 503 -24.280 21.772 -13.275 1.00 65.87 ATOM 107 CA HIS C 503 -25.522 22.514 -13.515 1.00 67.93 ATOM 108 C HIS C 503 -26.747 21.637 -13.617 1.00 66.79 ATOM 109 O HIS C 503 -27.860 22.103 -13.378 1.00 67.49 ATOM 110 CB HIS C 503 -25.388 23.431 -14.718 1.00 73.67 ATOM 111 CG HIS C 503 -24.500 24.632 -14.477 1.00 76.37 ATOM 112 ND1 HIS C 503 -24.836 25.873 -14.883 1.00 81.98 ATOM 113 CD2 HIS C 503 -23.254 24.744 -13.858 1.00 74.87 ATOM 114 CE1 HIS C 503 -23.857 26.736 -14.543 1.00 83.90 ATOM 115 NE2 HIS C 503 -22.891 26.044 -13.914 1.00 79.22 ATOM 116 N GLU C 504 -26.550 20.364 -13.964 1.00 65.70 ATOM 117 CA GLU C 504 -27.623 19.364 -13.958 1.00 64.45 ATOM 118 C GLU C 504 -27.679 18.655 -12.616 1.00 59.62 ATOM 119 O GLU C 504 -28.176 17.537 -12.523 1.00 59.52 ATOM 120 CB GLU C 504 -27.435 18.340 -15.087 1.00 67.30 ATOM 121 CG GLU C 504 -28.234 18.632 -16.344 1.00 72.83 ATOM 122 CD GLU C 504 -27.789 19.905 -17.040 1.00 77.96 ATOM 123 OE1 GLU C 504 -26.684 20.381 -16.704 1.00 77.55 ATOM 124 OE2 GLU C 504 -28.528 20.431 -17.923 1.00 82.49 ATOM 125 N ASN C 505 -27.162 19.318 -11.583 1.00 57.40 ATOM 126 CA ASN C 505 -27.141 18.812 -10.189 1.00 54.05 ATOM 127 C ASN C 505 -26.497 17.454 -10.000 1.00 53.29 ATOM 128 O ASN C 505 -26.808 16.728 -9.057 1.00 54.55 ATOM 129 CB ASN C 505 -28.534 18.835 -9.538 1.00 53.01 ATOM 130 CG ASN C 505 -29.084 20.236 -9.388 1.00 53.33 ATOM 131 OD1 ASN C 505 -28.397 21.158 -8.931 1.00 52.13 ATOM 132 ND2 ASN C 505 -30.337 20.406 -9.786 1.00 55.40 ATOM 133 N ASN C 506 -25.590 17.119 -10.899 1.00 53.73 ATOM 134 CA ASN C 506 -24.820 15.908 -10.782 1.00 52.45 ATOM 135 C ASN C 506 -23.477 16.226 -10.179 1.00 49.77 ATOM 136 O ASN C 506 -23.073 17.381 -10.158 1.00 49.96 ATOM 137 CB ASN C 506 -24.671 15.267 -12.154 1.00 56.12 ATOM 138 CG ASN C 506 -25.961 14.639 -12.627 1.00 58.54 ATOM 139 OD1 ASN C 506 -26.674 14.020 -11.822 1.00 57.45 ATOM 140 ND2 ASN C 506 -26.284 14.800 -13.927 1.00 60.98 ATOM 141 N TRP C 507 -22.795 15.205 -9.681 1.00 48.31 ATOM 142 CA TRP C 507 -21.459 15.392 -9.137 1.00 47.75 ATOM 143 C TRP C 507 -20.394 15.268 -10.194 1.00 51.02 ATOM 144 O TRP C 507 -20.190 14.178 -10.737 1.00 52.50 ATOM 145 CB TRP C 507 -21.225 14.428 -7.985 1.00 45.30 ATOM 146 CG TRP C 507 -22.099 14.784 -6.815 1.00 43.07 ATOM 147 CD1 TRP C 507 -23.356 14.283 -6.507 1.00 43.36 ATOM 148 CD2 TRP C 507 -21.826 15.777 -5.786 1.00 41.31 ATOM 149 NE1 TRP C 507 -23.850 14.864 -5.379 1.00 41.55 ATOM 150 CE2 TRP C 507 -22.983 15.770 -4.897 1.00 40.82 ATOM 151 CE3 TRP C 507 -20.761 16.618 -5.503 1.00 41.02 ATOM 152 CZ2 TRP C 507 -23.055 16.586 -3.783 1.00 40.20 ATOM 153 CZ3 TRP C 507 -20.848 17.434 -4.379 1.00 40.21 ATOM 154 CH2 TRP C 507 -21.971 17.414 -3.540 1.00 39.73 ATOM 155 N ARG C 508 -19.711 16.384 -10.491 1.00 52.18 ATOM 156 CA ARG C 508 -18.650 16.406 -11.509 1.00 56.07 ATOM 157 C ARG C 508 -17.198 16.304 -10.977 1.00 56.54 ATOM 158 O ARG C 508 -16.806 17.055 -10.068 1.00 53.88 ATOM 159 CB ARG C 508 -18.799 17.619 -12.449 1.00 58.56 ATOM 160 CG ARG C 508 -17.675 17.722 -13.476 1.00 62.22 ATOM 161 CD ARG C 508 -18.059 18.460 -14.749 1.00 67.25 ATOM 162 NE ARG C 508 -17.169 18.087 -15.865 1.00 72.89 ATOM 163 CZ ARG C 508 -16.029 18.710 -16.181 1.00 76.18 ATOM 164 NH1 ARG C 508 -15.611 19.765 -15.487 1.00 75.54 ATOM 165 NH2 ARG C 508 -15.298 18.280 -17.198 1.00 80.99 ATOM 166 N CYS C 509 -16.421 15.383 -11.571 1.00 59.43 ATOM 167 CA CYS C 509 -14.965 15.315 -11.390 1.00 61.87 ATOM 168 C CYS C 509 -14.256 16.056 -12.515 1.00 67.45 ATOM 169 O CYS C 509 -14.648 15.940 -13.677 1.00 71.32 ATOM 170 CB CYS C 509 -14.465 13.860 -11.362 1.00 63.54 ATOM 171 SG CYS C 509 -12.676 13.714 -11.067 1.00 65.26 ATOM 172 N GLU C 510 -13.207 16.803 -12.176 1.00 69.59 ATOM 173 CA GLU C 510 -12.402 17.500 -13.192 1.00 75.90 ATOM 174 C GLU C 510 -11.467 16.537 -13.923 1.00 80.00 ATOM 175 O GLU C 510 -11.580 16.361 -15.135 1.00 82.72 ATOM 176 CB GLU C 510 -11.589 18.661 -12.585 1.00 76.84 ATOM 177 CG GLU C 510 -12.393 19.860 -12.103 1.00 74.79 ATOM 178 CD GLU C 510 -13.480 20.263 -13.075 1.00 76.35 ATOM 179 OE1 GLU C 510 -14.561 19.635 -13.057 1.00 73.35 ATOM 180 OE2 GLU C 510 -13.258 21.213 -13.852 1.00 81.87 ATOM 181 N LYS C 511 -10.559 15.923 -13.158 1.00 80.87 ATOM 182 CA LYS C 511 -9.528 15.016 -13.671 1.00 86.93 ATOM 183 C LYS C 511 -10.102 13.991 -14.633 1.00 91.95 ATOM 184 O LYS C 511 -9.617 13.853 -15.775 1.00 98.99 ATOM 185 CB LYS C 511 -8.817 14.278 -12.521 1.00 84.44 ATOM 186 CG LYS C 511 -7.698 13.333 -12.962 1.00 89.10 ATOM 187 CD LYS C 511 -7.912 11.923 -12.422 1.00 88.02 ATOM 188 CE LYS C 511 -6.636 11.093 -12.431 1.00 91.57 ATOM 189 NZ LYS C 511 -5.687 11.480 -11.349 1.00 89.31 ATOM 190 N CYS C 512 -11.114 13.257 -14.170 1.00 89.01 ATOM 191 CA CYS C 512 -11.699 12.227 -15.013 1.00 93.85 ATOM 192 C CYS C 512 -12.881 12.743 -15.850 1.00 95.34 ATOM 193 O CYS C 512 -13.489 11.984 -16.610 1.00 99.34 ATOM 194 CB CYS C 512 -11.963 10.913 -14.254 1.00 91.71 ATOM 195 SG CYS C 512 -13.092 10.975 -12.864 1.00 86.82 ATOM 196 N ASP C 513 -13.160 14.045 -15.737 1.00 92.19 ATOM 197 CA ASP C 513 -14.030 14.756 -16.683 1.00 91.05 ATOM 198 C ASP C 513 -15.324 13.972 -16.945 1.00 88.92 ATOM 199 O ASP C 513 -15.506 13.386 -18.008 1.00 93.41 ATOM 200 CB ASP C 513 -13.253 15.047 -17.977 1.00 97.30 ATOM 201 CG ASP C 513 -14.039 15.891 -18.982 1.00101.33 ATOM 202 OD1 ASP C 513 -15.207 16.252 -18.718 1.00 96.83 ATOM 203 OD2 ASP C 513 -13.476 16.188 -20.063 1.00109.35 ATOM 204 N ARG C 514 -16.208 13.964 -15.948 1.00 81.65 ATOM 205 CA ARG C 514 -17.445 13.183 -15.980 1.00 78.85 ATOM 206 C ARG C 514 -18.293 13.505 -14.744 1.00 70.66 ATOM 207 O ARG C 514 -17.893 14.322 -13.912 1.00 65.86 ATOM 208 CB ARG C 514 -17.130 11.686 -16.029 1.00 81.73 ATOM 209 CG ARG C 514 -18.288 10.833 -16.492 1.00 84.40 ATOM 210 CD ARG C 514 -18.154 9.399 -16.016 1.00 86.46 ATOM 211 NE ARG C 514 -19.256 8.634 -16.581 1.00 90.64 ATOM 212 CZ ARG C 514 -20.313 8.212 -15.898 1.00 88.44 ATOM 213 NH1 ARG C 514 -20.404 8.442 -14.597 1.00 82.04 ATOM 214 NH2 ARG C 514 -21.272 7.537 -16.523 1.00 93.16 ATOM 215 N SER C 515 -19.456 12.858 -14.642 1.00 69.10 ATOM 216 CA SER C 515 -20.413 13.091 -13.567 1.00 64.77 ATOM 217 C SER C 515 -21.140 11.825 -13.141 1.00 66.24 ATOM 218 O SER C 515 -21.430 10.963 -13.963 1.00 70.19 ATOM 219 CB SER C 515 -21.440 14.162 -13.948 1.00 63.58 ATOM 220 OG SER C 515 -20.839 15.439 -14.057 1.00 63.22 ATOM 221 N TYR C 516 -21.432 11.739 -11.842 1.00 64.15 ATOM 222 CA TYR C 516 -22.162 10.629 -11.249 1.00 64.83 ATOM 223 C TYR C 516 -23.307 11.180 -10.393 1.00 62.29 ATOM 224 O TYR C 516 -23.180 12.250 -9.784 1.00 57.73 ATOM 225 CB TYR C 516 -21.224 9.816 -10.368 1.00 65.90 ATOM 226 CG TYR C 516 -19.965 9.329 -11.047 1.00 70.10 ATOM 227 CD1 TYR C 516 -18.837 10.152 -11.173 1.00 69.11 ATOM 228 CD2 TYR C 516 -19.888 8.028 -11.538 1.00 76.45 ATOM 229 CE1 TYR C 516 -17.677 9.688 -11.789 1.00 73.59 ATOM 230 CE2 TYR C 516 -18.738 7.552 -12.150 1.00 81.07 ATOM 231 CZ TYR C 516 -17.639 8.379 -12.276 1.00 80.12 ATOM 232 OH TYR C 516 -16.515 7.875 -12.895 1.00 86.30 ATOM 233 N ALA C 517 -24.422 10.448 -10.348 1.00 65.55 ATOM 234 CA ALA C 517 -25.531 10.759 -9.431 1.00 64.29 ATOM 235 C ALA C 517 -25.101 10.698 -7.960 1.00 64.26 ATOM 236 O ALA C 517 -25.512 11.537 -7.144 1.00 64.33 ATOM 237 CB ALA C 517 -26.705 9.825 -9.671 1.00 66.00 ATOM 238 N THR C 518 -24.266 9.711 -7.638 1.00 65.69 ATOM 239 CA THR C 518 -23.830 9.462 -6.273 1.00 65.34 ATOM 240 C THR C 518 -22.350 9.804 -6.119 1.00 62.90 ATOM 241 O THR C 518 -21.537 9.415 -6.969 1.00 64.30 ATOM 242 CB THR C 518 -24.055 7.983 -5.898 1.00 72.78 ATOM 243 OG1 THR C 518 -25.404 7.611 -6.209 1.00 78.41 ATOM 244 CG2 THR C 518 -23.796 7.725 -4.415 1.00 72.92 ATOM 245 N PRO C 519 -21.995 10.538 -5.039 1.00 59.02 ATOM 246 CA PRO C 519 -20.598 10.756 -4.727 1.00 56.66 ATOM 247 C PRO C 519 -20.097 9.695 -3.760 1.00 58.08 ATOM 248 O PRO C 519 -20.887 9.091 -3.032 1.00 59.09 ATOM 249 CB PRO C 519 -20.613 12.122 -4.039 1.00 53.96 ATOM 250 CG PRO C 519 -21.936 12.175 -3.351 1.00 54.56 ATOM 251 CD PRO C 519 -22.872 11.240 -4.081 1.00 57.69 ATOM 252 N GLU C 520 -18.790 9.466 -3.775 1.00 59.05 ATOM 253 CA GLU C 520 -18.130 8.659 -2.760 1.00 61.01 ATOM 254 C GLU C 520 -17.738 9.595 -1.626 1.00 55.39 ATOM 255 O GLU C 520 -17.433 10.765 -1.856 1.00 51.40 ATOM 256 CB GLU C 520 -16.869 8.008 -3.329 1.00 67.45 ATOM 257 CG GLU C 520 -16.713 6.531 -2.981 1.00 76.23 ATOM 258 CD GLU C 520 -17.156 5.633 -4.121 1.00 82.71 ATOM 259 OE1 GLU C 520 -16.350 5.436 -5.063 1.00 85.53 ATOM 260 OE2 GLU C 520 -18.308 5.135 -4.078 1.00 86.62 ATOM 261 ZN ZN C 701 -11.949 11.487 -10.880 1.00 72.48 TER