HEADER SIGNALING PROTEIN 16-MAR-07 2P6A TITLE The structure of the Activin:Follistatin 315 complex COMPND MOL_ID: 2; COMPND 2 MOLECULE: Follistatin; COMPND 3 CHAIN: D, C; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 3.40 ANGSTORMS DBREF 2P6A C 1 315 UNP P19883 FST_HUMAN 30 344 SEQRES 1 C 28 ALA LYS SER CYS GLU ASP ILE GLN CYS THR GLY GLY LYS SEQRES 2 C 28 LYS CYS LEU TRP ASP PHE LYS VAL GLY ARG GLY ARG CYS SEQRES 3 C 28 SER LEU ATOM 1 N ALA C 213 17.356 5.523 80.069 1.00 18.32 ATOM 2 CA ALA C 213 16.809 4.237 79.693 1.00 50.29 ATOM 3 C ALA C 213 17.909 3.344 79.177 1.00 45.34 ATOM 4 O ALA C 213 19.025 3.808 78.898 1.00 40.77 ATOM 5 CB ALA C 213 15.730 4.381 78.667 1.00 80.99 ATOM 6 N LYS C 214 17.546 2.080 78.997 1.00 17.83 ATOM 7 CA LYS C 214 18.511 1.048 78.654 1.00 25.89 ATOM 8 C LYS C 214 18.418 0.461 77.232 1.00 10.76 ATOM 9 O LYS C 214 19.026 -0.574 76.957 1.00 16.61 ATOM 10 CB LYS C 214 18.443 -0.050 79.725 1.00 7.38 ATOM 11 N SER C 215 17.701 1.120 76.326 1.00 0.86 ATOM 12 CA SER C 215 17.361 0.478 75.069 1.00 12.53 ATOM 13 C SER C 215 16.565 1.502 74.267 1.00 -1.37 ATOM 14 O SER C 215 16.077 2.474 74.831 1.00 9.96 ATOM 15 CB SER C 215 16.557 -0.807 75.340 1.00 -0.46 ATOM 16 N CYS C 216 16.441 1.332 72.955 1.00 9.72 ATOM 17 CA CYS C 216 15.856 2.421 72.177 1.00 23.84 ATOM 18 C CYS C 216 14.391 2.592 72.499 1.00 17.38 ATOM 19 O CYS C 216 13.913 3.711 72.716 1.00 32.35 ATOM 20 CB CYS C 216 16.113 2.300 70.669 1.00 62.81 ATOM 21 SG CYS C 216 17.505 3.328 70.007 1.00 54.20 ATOM 22 N GLU C 217 13.684 1.469 72.570 1.00 13.51 ATOM 23 CA GLU C 217 12.254 1.541 72.915 1.00 55.94 ATOM 24 C GLU C 217 12.232 2.128 74.300 1.00 2.00 ATOM 25 O GLU C 217 13.017 1.733 75.102 1.00 1.79 ATOM 26 CB GLU C 217 11.540 0.180 72.885 1.00 37.55 ATOM 27 CG GLU C 217 12.043 -0.779 73.906 1.00 24.18 ATOM 28 CD GLU C 217 13.414 -1.276 73.535 1.00 33.63 ATOM 29 OE1 GLU C 217 14.389 -1.084 74.334 1.00 44.30 ATOM 30 OE2 GLU C 217 13.524 -1.802 72.386 1.00 67.87 ATOM 31 N ASP C 218 11.440 3.164 74.514 1.00 42.95 ATOM 32 CA ASP C 218 11.621 4.021 75.684 1.00 65.84 ATOM 33 C ASP C 218 11.887 5.410 75.192 1.00 53.93 ATOM 34 O ASP C 218 11.205 6.386 75.534 1.00 72.94 ATOM 35 CB ASP C 218 12.872 3.648 76.468 1.00 32.74 ATOM 36 CG ASP C 218 12.807 4.168 77.882 1.00 80.80 ATOM 37 OD1 ASP C 218 12.134 5.213 78.053 1.00115.47 ATOM 38 OD2 ASP C 218 13.379 3.528 78.803 1.00 83.35 ATOM 39 N ILE C 219 12.956 5.482 74.421 1.00 13.05 ATOM 40 CA ILE C 219 13.185 6.684 73.652 1.00 37.55 ATOM 41 C ILE C 219 12.108 6.939 72.607 1.00 38.17 ATOM 42 O ILE C 219 11.959 6.163 71.636 1.00 3.44 ATOM 43 CB ILE C 219 14.471 6.574 72.885 1.00 16.65 ATOM 44 CG1 ILE C 219 15.580 6.044 73.785 1.00 47.13 ATOM 45 CG2 ILE C 219 14.793 7.901 72.261 1.00 59.68 ATOM 46 CD1 ILE C 219 16.973 6.256 73.207 1.00 12.03 ATOM 47 N GLN C 220 11.403 8.052 72.806 1.00 23.78 ATOM 48 CA GLN C 220 10.427 8.527 71.844 1.00 32.79 ATOM 49 C GLN C 220 11.217 9.011 70.647 1.00 46.41 ATOM 50 O GLN C 220 12.419 8.780 70.581 1.00 48.11 ATOM 51 CB GLN C 220 9.644 9.688 72.432 1.00 53.13 ATOM 52 N CYS C 221 10.534 9.660 69.701 1.00 76.71 ATOM 53 CA CYS C 221 11.171 10.383 68.593 1.00 66.86 ATOM 54 C CYS C 221 10.175 10.956 67.591 1.00 73.46 ATOM 55 O CYS C 221 9.498 10.198 66.896 1.00 69.18 ATOM 56 CB CYS C 221 12.219 9.529 67.869 1.00 38.30 ATOM 57 SG CYS C 221 11.976 7.747 67.939 1.00 77.12 ATOM 58 N THR C 222 10.094 12.284 67.512 1.00 89.00 ATOM 59 CA THR C 222 9.290 12.921 66.468 1.00 94.09 ATOM 60 C THR C 222 10.172 13.162 65.253 1.00 79.62 ATOM 61 O THR C 222 11.236 12.547 65.116 1.00 52.00 ATOM 62 CB THR C 222 8.696 14.278 66.895 1.00100.94 ATOM 63 OG1 THR C 222 9.649 15.327 66.612 1.00108.89 ATOM 64 CG2 THR C 222 8.293 14.271 68.383 1.00116.08 ATOM 65 N GLY C 223 9.738 14.080 64.393 1.00 86.38 ATOM 66 CA GLY C 223 10.428 14.344 63.129 1.00 97.31 ATOM 67 C GLY C 223 10.497 13.083 62.281 1.00 86.75 ATOM 68 O GLY C 223 11.035 13.087 61.157 1.00 49.21 ATOM 69 N GLY C 224 9.963 12.000 62.852 1.00 49.68 ATOM 70 CA GLY C 224 9.904 10.710 62.185 1.00 58.33 ATOM 71 C GLY C 224 11.285 10.098 62.090 1.00 42.11 ATOM 72 O GLY C 224 11.543 9.204 61.280 1.00 34.02 ATOM 73 N LYS C 225 12.199 10.594 62.911 1.00 37.95 ATOM 74 CA LYS C 225 13.516 9.984 62.950 1.00 34.34 ATOM 75 C LYS C 225 13.342 8.638 63.614 1.00 43.53 ATOM 76 O LYS C 225 12.265 8.332 64.141 1.00 54.78 ATOM 77 CB LYS C 225 14.525 10.852 63.707 1.00 50.08 ATOM 78 CG LYS C 225 15.013 12.054 62.890 1.00 68.58 ATOM 79 CD LYS C 225 16.258 12.724 63.466 1.00 30.09 ATOM 80 CE LYS C 225 15.918 13.714 64.577 1.00 84.44 ATOM 81 NZ LYS C 225 15.067 14.833 64.076 1.00100.49 ATOM 82 N LYS C 226 14.384 7.817 63.538 1.00 38.76 ATOM 83 CA LYS C 226 14.357 6.483 64.133 1.00 48.03 ATOM 84 C LYS C 226 15.561 6.276 65.052 1.00 60.91 ATOM 85 O LYS C 226 16.700 6.175 64.574 1.00 34.65 ATOM 86 CB LYS C 226 14.342 5.401 63.044 1.00 78.08 ATOM 87 CG LYS C 226 13.070 5.381 62.173 1.00116.21 ATOM 88 CD LYS C 226 13.186 4.472 60.930 1.00103.11 ATOM 89 CE LYS C 226 13.064 2.977 61.256 1.00 94.86 ATOM 90 NZ LYS C 226 13.299 2.129 60.045 1.00 46.91 ATOM 91 N CYS C 227 15.302 6.233 66.363 1.00 61.87 ATOM 92 CA CYS C 227 16.334 5.932 67.361 1.00 41.43 ATOM 93 C CYS C 227 17.271 4.806 66.918 1.00 10.07 ATOM 94 O CYS C 227 16.865 3.910 66.183 1.00 61.69 ATOM 95 CB CYS C 227 15.681 5.495 68.676 1.00 67.44 ATOM 96 SG CYS C 227 16.838 5.246 70.078 1.00 46.45 ATOM 97 N LEU C 228 18.521 4.880 67.370 1.00 0.89 ATOM 98 CA LEU C 228 19.483 3.778 67.327 1.00 20.37 ATOM 99 C LEU C 228 20.490 3.885 68.456 1.00 13.94 ATOM 100 O LEU C 228 20.769 4.967 68.968 1.00 23.95 ATOM 101 CB LEU C 228 20.193 3.652 65.986 1.00 11.79 ATOM 102 CG LEU C 228 20.502 4.998 65.349 1.00 55.38 ATOM 103 CD1 LEU C 228 21.700 5.529 66.100 1.00 39.29 ATOM 104 CD2 LEU C 228 20.785 4.848 63.849 1.00 49.91 ATOM 105 N TRP C 229 21.023 2.743 68.862 1.00 32.12 ATOM 106 CA TRP C 229 21.736 2.680 70.128 1.00 30.53 ATOM 107 C TRP C 229 23.207 2.604 69.823 1.00 8.87 ATOM 108 O TRP C 229 23.576 2.483 68.660 1.00 47.74 ATOM 109 CB TRP C 229 21.314 1.426 70.889 1.00 43.46 ATOM 110 CG TRP C 229 21.854 1.341 72.280 1.00 25.38 ATOM 111 CD1 TRP C 229 22.948 0.651 72.676 1.00 8.88 ATOM 112 CD2 TRP C 229 21.295 1.941 73.466 1.00 23.69 ATOM 113 NE1 TRP C 229 23.132 0.802 74.039 1.00 27.93 ATOM 114 CE2 TRP C 229 22.127 1.582 74.544 1.00 0.60 ATOM 115 CE3 TRP C 229 20.167 2.731 73.716 1.00 -1.44 ATOM 116 CZ2 TRP C 229 21.882 1.996 75.848 1.00 2.88 ATOM 117 CZ3 TRP C 229 19.916 3.116 75.004 1.00 14.55 ATOM 118 CH2 TRP C 229 20.780 2.768 76.059 1.00 20.51 ATOM 119 N ASP C 230 24.046 2.681 70.852 1.00 26.54 ATOM 120 CA ASP C 230 25.491 2.477 70.671 1.00 35.10 ATOM 121 C ASP C 230 26.141 1.977 71.951 1.00 27.98 ATOM 122 O ASP C 230 26.330 2.724 72.908 1.00 3.90 ATOM 123 CB ASP C 230 26.171 3.778 70.295 1.00 27.56 ATOM 124 CG ASP C 230 25.999 4.812 71.367 1.00 50.96 ATOM 125 OD1 ASP C 230 27.034 5.229 71.912 1.00 58.54 ATOM 126 OD2 ASP C 230 24.836 5.144 71.710 1.00 52.92 ATOM 127 N PHE C 231 26.512 0.706 71.934 1.00 4.00 ATOM 128 CA PHE C 231 27.044 0.067 73.114 1.00 19.41 ATOM 129 C PHE C 231 28.370 0.688 73.525 1.00 42.12 ATOM 130 O PHE C 231 28.980 0.318 74.534 1.00 51.65 ATOM 131 CB PHE C 231 27.218 -1.394 72.782 1.00 43.31 ATOM 132 CG PHE C 231 26.146 -1.916 71.886 1.00 32.25 ATOM 133 CD1 PHE C 231 26.446 -2.403 70.624 1.00 75.16 ATOM 134 CD2 PHE C 231 24.830 -1.900 72.297 1.00 39.14 ATOM 135 CE1 PHE C 231 25.450 -2.912 69.800 1.00 70.71 ATOM 136 CE2 PHE C 231 23.832 -2.381 71.487 1.00 10.76 ATOM 137 CZ PHE C 231 24.143 -2.905 70.236 1.00 58.91 ATOM 138 N LYS C 232 28.803 1.660 72.735 1.00 27.64 ATOM 139 CA LYS C 232 30.053 2.334 72.996 1.00 23.16 ATOM 140 C LYS C 232 29.960 2.972 74.389 1.00 39.53 ATOM 141 O LYS C 232 30.396 2.373 75.375 1.00 64.94 ATOM 142 CB LYS C 232 30.272 3.335 71.870 1.00 47.60 ATOM 143 CG LYS C 232 29.556 2.900 70.583 1.00 22.57 ATOM 144 CD LYS C 232 29.976 3.706 69.343 1.00 77.71 ATOM 145 CE LYS C 232 29.141 3.385 68.088 1.00 62.28 ATOM 146 NZ LYS C 232 29.610 2.171 67.338 1.00 77.43 ATOM 147 N VAL C 233 29.314 4.130 74.493 1.00 31.81 ATOM 148 CA VAL C 233 29.015 4.737 75.790 1.00 25.28 ATOM 149 C VAL C 233 27.769 4.137 76.434 1.00 27.99 ATOM 150 O VAL C 233 27.433 4.463 77.579 1.00 26.64 ATOM 151 CB VAL C 233 28.706 6.225 75.648 1.00 12.15 ATOM 152 CG1 VAL C 233 29.982 7.059 75.660 1.00 69.74 ATOM 153 CG2 VAL C 233 27.875 6.461 74.412 1.00 11.02 ATOM 154 N GLY C 234 27.070 3.290 75.688 1.00 12.22 ATOM 155 CA GLY C 234 25.761 2.813 76.123 1.00 23.69 ATOM 156 C GLY C 234 24.615 3.824 76.122 1.00 18.30 ATOM 157 O GLY C 234 23.905 3.991 77.117 1.00 13.76 ATOM 158 N ARG C 235 24.367 4.444 74.975 1.00 10.16 ATOM 159 CA ARG C 235 23.237 5.343 74.870 1.00 4.63 ATOM 160 C ARG C 235 22.374 5.248 73.604 1.00 25.14 ATOM 161 O ARG C 235 22.750 4.652 72.587 1.00 15.89 ATOM 162 CB ARG C 235 23.746 6.751 75.062 1.00 18.22 ATOM 163 CG ARG C 235 24.050 7.077 76.505 1.00 45.92 ATOM 164 CD ARG C 235 23.983 8.589 76.749 1.00 52.43 ATOM 165 NE ARG C 235 25.053 8.954 77.668 1.00 54.90 ATOM 166 CZ ARG C 235 26.135 9.658 77.343 1.00 43.55 ATOM 167 NH1 ARG C 235 26.284 10.160 76.113 1.00 62.54 ATOM 168 NH2 ARG C 235 27.065 9.874 78.268 1.00 72.44 ATOM 169 N GLY C 236 21.202 5.862 73.653 1.00 0.16 ATOM 170 CA GLY C 236 20.380 5.845 72.458 1.00 29.58 ATOM 171 C GLY C 236 20.646 7.040 71.569 1.00 2.33 ATOM 172 O GLY C 236 21.229 8.020 72.013 1.00 12.58 ATOM 173 N ARG C 237 20.158 6.979 70.331 1.00 34.41 ATOM 174 CA ARG C 237 20.319 8.073 69.366 1.00 34.96 ATOM 175 C ARG C 237 19.206 8.184 68.315 1.00 24.63 ATOM 176 O ARG C 237 18.976 7.260 67.540 1.00 25.34 ATOM 177 CB ARG C 237 21.642 7.921 68.629 1.00 19.66 ATOM 178 CG ARG C 237 21.929 9.092 67.733 1.00 3.30 ATOM 179 CD ARG C 237 22.822 10.071 68.426 1.00 55.61 ATOM 180 NE ARG C 237 24.188 9.557 68.474 1.00 44.98 ATOM 181 CZ ARG C 237 25.150 9.904 67.619 1.00 94.72 ATOM 182 NH1 ARG C 237 24.891 10.768 66.642 1.00108.77 ATOM 183 NH2 ARG C 237 26.374 9.390 67.734 1.00 94.41 ATOM 184 N CYS C 238 18.565 9.343 68.240 1.00 22.04 ATOM 185 CA CYS C 238 17.410 9.485 67.379 1.00 6.05 ATOM 186 C CYS C 238 17.744 9.999 65.997 1.00 24.44 ATOM 187 O CYS C 238 17.558 11.179 65.701 1.00 36.93 ATOM 188 CB CYS C 238 16.366 10.334 68.074 1.00 1.28 ATOM 189 SG CYS C 238 15.235 9.153 68.811 1.00 17.27 ATOM 190 N SER C 239 18.215 9.080 65.157 1.00 21.63 ATOM 191 CA SER C 239 18.668 9.383 63.809 1.00 13.43 ATOM 192 C SER C 239 17.575 9.389 62.748 1.00 30.35 ATOM 193 O SER C 239 16.416 9.028 63.001 1.00 22.57 ATOM 194 CB SER C 239 19.710 8.363 63.366 1.00 28.79 ATOM 195 OG SER C 239 20.141 8.616 62.030 1.00 74.55 ATOM 196 N LEU C 240 17.989 9.757 61.535 1.00 15.99 ATOM 197 CA LEU C 240 17.074 9.852 60.423 1.00 9.44 ATOM 198 C LEU C 240 17.421 8.915 59.278 1.00 24.93 ATOM 199 O LEU C 240 18.409 9.087 58.549 1.00 14.06 ATOM 200 CB LEU C 240 16.887 11.289 59.957 1.00 5.31 ATOM 201 CG LEU C 240 15.983 11.511 58.734 1.00 42.19 ATOM 202 CD1 LEU C 240 14.579 10.887 58.864 1.00 54.49 ATOM 203 CD2 LEU C 240 15.895 12.990 58.415 1.00 20.31 TER