HEADER MEMBRANE PROTEIN 31-DEC-69 7AFT TITLE Cryo-EM structure of the signal sequence-engaged post-translational TITLE 2 Sec translocon COMPND MOL_ID: 3; COMPND 2 MOLECULE: Protein transport protein SSS1; COMPND 3 CHAIN: C; EXPDTA ELECTRON MICROSCOPY DBREF 7AFT C 1 80 UNP P35179 SC61G_YEAST 1 80 SEQRES 1 C 55 VAL GLU PHE VAL ARG GLU GLY THR GLN PHE LEU ALA LYS SEQRES 2 C 55 CYS LYS LYS PRO ASP LEU LYS GLU TYR THR LYS ILE VAL SEQRES 3 C 55 LYS ALA VAL GLY ILE GLY PHE ILE ALA VAL GLY ILE ILE SEQRES 4 C 55 GLY TYR ALA ILE LYS LEU ILE HIS ILE PRO ILE ARG TYR SEQRES 5 C 55 VAL ILE VAL ATOM 1 N VAL C 26 148.041 119.799 99.654 1.00417.68 ATOM 2 CA VAL C 26 148.951 120.135 98.569 1.00417.68 ATOM 3 C VAL C 26 148.266 119.928 97.218 1.00417.68 ATOM 4 O VAL C 26 148.408 120.746 96.310 1.00417.68 ATOM 5 CB VAL C 26 150.248 119.313 98.664 1.00417.68 ATOM 6 N GLU C 27 147.518 118.832 97.090 1.00378.39 ATOM 7 CA GLU C 27 146.805 118.514 95.859 1.00378.39 ATOM 8 C GLU C 27 145.324 118.233 96.058 1.00378.39 ATOM 9 O GLU C 27 144.516 118.609 95.200 1.00378.39 ATOM 10 CB GLU C 27 147.453 117.299 95.169 1.00378.39 ATOM 11 N PHE C 28 144.951 117.604 97.174 1.00327.82 ATOM 12 CA PHE C 28 143.603 117.075 97.337 1.00327.82 ATOM 13 C PHE C 28 142.564 118.183 97.270 1.00327.82 ATOM 14 O PHE C 28 141.607 118.106 96.493 1.00327.82 ATOM 15 CB PHE C 28 143.506 116.323 98.664 1.00327.82 ATOM 16 N VAL C 29 142.741 119.227 98.080 1.00353.14 ATOM 17 CA VAL C 29 141.739 120.284 98.156 1.00353.14 ATOM 18 C VAL C 29 141.664 121.055 96.844 1.00353.14 ATOM 19 O VAL C 29 140.572 121.372 96.363 1.00353.14 ATOM 20 CB VAL C 29 142.027 121.214 99.349 1.00353.14 ATOM 21 N ARG C 30 142.813 121.364 96.240 1.00339.29 ATOM 22 CA ARG C 30 142.796 122.110 94.985 1.00339.29 ATOM 23 C ARG C 30 142.056 121.334 93.901 1.00339.29 ATOM 24 O ARG C 30 141.171 121.875 93.222 1.00339.29 ATOM 25 CB ARG C 30 144.225 122.440 94.550 1.00339.29 ATOM 26 N GLU C 31 142.386 120.049 93.746 1.00331.04 ATOM 27 CA GLU C 31 141.722 119.239 92.730 1.00331.04 ATOM 28 C GLU C 31 140.237 119.068 93.035 1.00331.04 ATOM 29 O GLU C 31 139.389 119.178 92.138 1.00331.04 ATOM 30 CB GLU C 31 142.418 117.883 92.619 1.00331.04 ATOM 31 N GLY C 32 139.898 118.822 94.299 1.00302.10 ATOM 32 CA GLY C 32 138.507 118.632 94.654 1.00302.10 ATOM 33 C GLY C 32 137.670 119.881 94.504 1.00302.10 ATOM 34 O GLY C 32 136.478 119.795 94.220 1.00302.10 ATOM 35 N THR C 33 138.268 121.057 94.681 1.00304.07 ATOM 36 CA THR C 33 137.507 122.281 94.463 1.00304.07 ATOM 37 C THR C 33 137.372 122.591 92.980 1.00304.07 ATOM 38 O THR C 33 136.322 123.079 92.539 1.00304.07 ATOM 39 CB THR C 33 138.157 123.453 95.192 1.00304.07 ATOM 40 N GLN C 34 138.421 122.322 92.196 1.00292.93 ATOM 41 CA GLN C 34 138.271 122.405 90.748 1.00292.93 ATOM 42 C GLN C 34 137.148 121.495 90.277 1.00292.93 ATOM 43 O GLN C 34 136.445 121.804 89.308 1.00292.93 ATOM 44 CB GLN C 34 139.583 122.049 90.054 1.00292.93 ATOM 45 N PHE C 35 136.966 120.365 90.956 1.00242.77 ATOM 46 CA PHE C 35 135.765 119.563 90.756 1.00242.77 ATOM 47 C PHE C 35 134.513 120.311 91.200 1.00242.77 ATOM 48 O PHE C 35 133.609 120.577 90.400 1.00242.77 ATOM 49 CB PHE C 35 135.883 118.252 91.521 1.00242.77 ATOM 50 N LEU C 36 134.450 120.646 92.490 1.00247.85 ATOM 51 CA LEU C 36 133.245 121.184 93.107 1.00247.85 ATOM 52 C LEU C 36 132.669 122.346 92.322 1.00247.85 ATOM 53 O LEU C 36 131.450 122.545 92.308 1.00247.85 ATOM 54 CB LEU C 36 133.556 121.616 94.541 1.00247.85 ATOM 55 N ALA C 37 133.516 123.106 91.641 1.00251.12 ATOM 56 CA ALA C 37 133.014 124.222 90.852 1.00251.12 ATOM 57 C ALA C 37 132.181 123.737 89.670 1.00251.12 ATOM 58 O ALA C 37 131.713 124.549 88.867 1.00251.12 ATOM 59 CB ALA C 37 134.169 125.093 90.363 1.00251.12 ATOM 60 N LYS C 38 131.982 122.424 89.555 1.00229.56 ATOM 61 CA LYS C 38 131.254 121.822 88.447 1.00229.56 ATOM 62 C LYS C 38 130.084 120.981 88.934 1.00229.56 ATOM 63 O LYS C 38 129.863 119.872 88.451 1.00229.56 ATOM 64 CB LYS C 38 132.181 120.967 87.591 1.00229.56 ATOM 65 N CYS C 39 129.303 121.494 89.884 1.00218.09 ATOM 66 CA CYS C 39 128.205 120.723 90.459 1.00218.09 ATOM 67 C CYS C 39 126.863 121.442 90.427 1.00218.09 ATOM 68 O CYS C 39 125.925 120.993 91.095 1.00218.09 ATOM 69 CB CYS C 39 128.544 120.317 91.891 1.00218.09 ATOM 70 N LYS C 40 126.749 122.539 89.681 1.00198.84 ATOM 71 CA LYS C 40 125.483 123.221 89.406 1.00198.84 ATOM 72 C LYS C 40 124.644 123.389 90.675 1.00198.84 ATOM 73 O LYS C 40 123.579 122.800 90.847 1.00198.84 ATOM 74 CB LYS C 40 124.688 122.491 88.322 1.00198.84 ATOM 75 N LYS C 41 125.184 124.198 91.577 1.00226.76 ATOM 76 CA LYS C 41 124.449 124.592 92.760 1.00226.76 ATOM 77 C LYS C 41 123.140 125.270 92.366 1.00226.76 ATOM 78 O LYS C 41 122.971 125.700 91.223 1.00226.76 ATOM 79 CB LYS C 41 125.285 125.550 93.599 1.00226.76 ATOM 80 N PRO C 42 122.197 125.378 93.296 1.00228.87 ATOM 81 CA PRO C 42 121.015 126.212 93.054 1.00228.87 ATOM 82 C PRO C 42 121.394 127.681 92.916 1.00228.87 ATOM 83 O PRO C 42 122.544 128.082 93.100 1.00228.87 ATOM 84 CB PRO C 42 120.145 125.971 94.292 1.00228.87 ATOM 85 N ASP C 43 120.394 128.495 92.580 1.00213.26 ATOM 86 CA ASP C 43 120.545 129.942 92.494 1.00213.26 ATOM 87 C ASP C 43 119.361 130.600 93.186 1.00213.26 ATOM 88 O ASP C 43 118.408 129.933 93.586 1.00213.26 ATOM 89 CB ASP C 43 120.653 130.417 91.037 1.00213.26 ATOM 90 N LEU C 44 119.419 131.931 93.278 1.00217.55 ATOM 91 CA LEU C 44 118.525 132.727 94.113 1.00217.55 ATOM 92 C LEU C 44 117.070 132.263 94.087 1.00217.55 ATOM 93 O LEU C 44 116.485 131.949 95.131 1.00217.55 ATOM 94 CB LEU C 44 118.621 134.187 93.669 1.00217.55 ATOM 95 N LYS C 45 116.468 132.229 92.899 1.00207.78 ATOM 96 CA LYS C 45 115.055 131.884 92.806 1.00207.78 ATOM 97 C LYS C 45 114.805 130.465 93.295 1.00207.78 ATOM 98 O LYS C 45 113.872 130.211 94.068 1.00207.78 ATOM 99 CB LYS C 45 114.575 132.048 91.369 1.00207.78 ATOM 100 N GLU C 46 115.631 129.525 92.848 1.00209.94 ATOM 101 CA GLU C 46 115.455 128.141 93.258 1.00209.94 ATOM 102 C GLU C 46 115.604 127.989 94.763 1.00209.94 ATOM 103 O GLU C 46 114.854 127.242 95.399 1.00209.94 ATOM 104 CB GLU C 46 116.457 127.259 92.525 1.00209.94 ATOM 105 N TYR C 47 116.581 128.678 95.345 1.00213.07 ATOM 106 CA TYR C 47 116.765 128.630 96.787 1.00213.07 ATOM 107 C TYR C 47 115.548 129.176 97.503 1.00213.07 ATOM 108 O TYR C 47 115.131 128.639 98.535 1.00213.07 ATOM 109 CB TYR C 47 118.007 129.417 97.180 1.00213.07 ATOM 110 N THR C 48 114.975 130.258 96.987 1.00211.28 ATOM 111 CA THR C 48 113.753 130.773 97.585 1.00211.28 ATOM 112 C THR C 48 112.661 129.718 97.551 1.00211.28 ATOM 113 O THR C 48 111.960 129.498 98.544 1.00211.28 ATOM 114 CB THR C 48 113.306 132.032 96.860 1.00211.28 ATOM 115 N LYS C 49 112.510 129.049 96.408 1.00210.23 ATOM 116 CA LYS C 49 111.543 127.961 96.308 1.00210.23 ATOM 117 C LYS C 49 111.780 126.929 97.392 1.00210.23 ATOM 118 O LYS C 49 110.869 126.569 98.148 1.00210.23 ATOM 119 CB LYS C 49 111.638 127.292 94.940 1.00210.23 ATOM 120 N ILE C 50 113.012 126.440 97.472 1.00215.91 ATOM 121 CA ILE C 50 113.287 125.302 98.331 1.00215.91 ATOM 122 C ILE C 50 113.097 125.680 99.789 1.00215.91 ATOM 123 O ILE C 50 112.592 124.882 100.585 1.00215.91 ATOM 124 CB ILE C 50 114.692 124.740 98.051 1.00215.91 ATOM 125 N VAL C 51 113.462 126.903 100.164 1.00198.27 ATOM 126 CA VAL C 51 113.245 127.324 101.540 1.00198.27 ATOM 127 C VAL C 51 111.759 127.435 101.816 1.00198.27 ATOM 128 O VAL C 51 111.237 126.804 102.741 1.00198.27 ATOM 129 CB VAL C 51 113.965 128.646 101.828 1.00198.27 ATOM 130 N LYS C 52 111.059 128.217 100.990 1.00243.49 ATOM 131 CA LYS C 52 109.621 128.390 101.126 1.00243.49 ATOM 132 C LYS C 52 108.900 127.062 101.271 1.00243.49 ATOM 133 O LYS C 52 107.849 126.990 101.913 1.00243.49 ATOM 134 CB LYS C 52 109.086 129.156 99.912 1.00243.49 ATOM 135 N ALA C 53 109.431 126.001 100.675 1.00239.54 ATOM 136 CA ALA C 53 108.803 124.701 100.878 1.00239.54 ATOM 137 C ALA C 53 109.252 124.062 102.187 1.00239.54 ATOM 138 O ALA C 53 108.449 123.846 103.106 1.00239.54 ATOM 139 CB ALA C 53 109.120 123.775 99.702 1.00239.54 ATOM 140 N VAL C 54 110.545 123.794 102.299 1.00226.94 ATOM 141 CA VAL C 54 111.016 122.862 103.307 1.00226.94 ATOM 142 C VAL C 54 111.055 123.513 104.676 1.00226.94 ATOM 143 O VAL C 54 110.610 122.923 105.665 1.00226.94 ATOM 144 CB VAL C 54 112.388 122.317 102.900 1.00226.94 ATOM 145 N GLY C 55 111.603 124.723 104.767 1.00206.05 ATOM 146 CA GLY C 55 111.652 125.378 106.058 1.00206.05 ATOM 147 C GLY C 55 110.270 125.617 106.614 1.00206.05 ATOM 148 O GLY C 55 110.060 125.552 107.825 1.00206.05 ATOM 149 N ILE C 56 109.305 125.869 105.737 1.00224.51 ATOM 150 CA ILE C 56 107.938 126.060 106.190 1.00224.51 ATOM 151 C ILE C 56 107.370 124.757 106.723 1.00224.51 ATOM 152 O ILE C 56 106.781 124.725 107.808 1.00224.51 ATOM 153 CB ILE C 56 107.081 126.647 105.062 1.00224.51 ATOM 154 N GLY C 57 107.532 123.663 105.978 1.00207.33 ATOM 155 CA GLY C 57 107.113 122.376 106.513 1.00207.33 ATOM 156 C GLY C 57 107.757 122.085 107.856 1.00207.33 ATOM 157 O GLY C 57 107.125 121.532 108.765 1.00207.33 ATOM 158 N PHE C 58 109.015 122.490 108.007 1.00195.75 ATOM 159 CA PHE C 58 109.763 122.202 109.222 1.00195.75 ATOM 160 C PHE C 58 109.217 122.993 110.398 1.00195.75 ATOM 161 O PHE C 58 108.954 122.438 111.471 1.00195.75 ATOM 162 CB PHE C 58 111.234 122.528 108.990 1.00195.75 ATOM 163 N ILE C 59 109.075 124.301 110.222 1.00188.98 ATOM 164 CA ILE C 59 108.465 125.121 111.255 1.00188.98 ATOM 165 C ILE C 59 107.083 124.592 111.588 1.00188.98 ATOM 166 O ILE C 59 106.656 124.615 112.746 1.00188.98 ATOM 167 CB ILE C 59 108.418 126.586 110.801 1.00188.98 ATOM 168 N ALA C 60 106.377 124.076 110.584 1.00220.20 ATOM 169 CA ALA C 60 105.042 123.542 110.808 1.00220.20 ATOM 170 C ALA C 60 105.077 122.390 111.798 1.00220.20 ATOM 171 O ALA C 60 104.445 122.444 112.860 1.00220.20 ATOM 172 CB ALA C 60 104.431 123.092 109.481 1.00220.20 ATOM 173 N VAL C 61 105.802 121.329 111.454 1.00216.25 ATOM 174 CA VAL C 61 105.866 120.179 112.349 1.00216.25 ATOM 175 C VAL C 61 106.367 120.596 113.725 1.00216.25 ATOM 176 O VAL C 61 105.831 120.165 114.762 1.00216.25 ATOM 177 CB VAL C 61 106.731 119.067 111.734 1.00216.25 ATOM 178 N GLY C 62 107.384 121.452 113.762 1.00209.88 ATOM 179 CA GLY C 62 107.923 121.894 115.024 1.00209.88 ATOM 180 C GLY C 62 106.853 122.502 115.896 1.00209.88 ATOM 181 O GLY C 62 106.569 121.990 116.978 1.00209.88 ATOM 182 N ILE C 63 106.232 123.575 115.409 1.00203.91 ATOM 183 CA ILE C 63 105.228 124.273 116.196 1.00203.91 ATOM 184 C ILE C 63 104.091 123.345 116.572 1.00203.91 ATOM 185 O ILE C 63 103.500 123.489 117.648 1.00203.91 ATOM 186 CB ILE C 63 104.734 125.507 115.431 1.00203.91 ATOM 187 N ILE C 64 103.776 122.367 115.721 1.00206.64 ATOM 188 CA ILE C 64 102.788 121.364 116.108 1.00206.64 ATOM 189 C ILE C 64 103.187 120.743 117.432 1.00206.64 ATOM 190 O ILE C 64 102.462 120.828 118.433 1.00206.64 ATOM 191 CB ILE C 64 102.650 120.283 115.026 1.00206.64 ATOM 192 N GLY C 65 104.366 120.125 117.450 1.00217.43 ATOM 193 CA GLY C 65 104.819 119.475 118.670 1.00217.43 ATOM 194 C GLY C 65 104.914 120.443 119.833 1.00217.43 ATOM 195 O GLY C 65 104.502 120.135 120.958 1.00217.43 ATOM 196 N TYR C 66 105.442 121.633 119.568 1.00205.39 ATOM 197 CA TYR C 66 105.629 122.638 120.603 1.00205.39 ATOM 198 C TYR C 66 104.316 122.949 121.298 1.00205.39 ATOM 199 O TYR C 66 104.166 122.739 122.508 1.00205.39 ATOM 200 CB TYR C 66 106.219 123.897 119.975 1.00205.39 ATOM 201 N ALA C 67 103.352 123.453 120.534 1.00202.54 ATOM 202 CA ALA C 67 102.085 123.860 121.114 1.00202.54 ATOM 203 C ALA C 67 101.383 122.688 121.773 1.00202.54 ATOM 204 O ALA C 67 100.761 122.847 122.829 1.00202.54 ATOM 205 CB ALA C 67 101.196 124.485 120.044 1.00202.54 ATOM 206 N ILE C 68 101.469 121.497 121.180 1.00177.77 ATOM 207 CA ILE C 68 100.701 120.401 121.751 1.00177.77 ATOM 208 C ILE C 68 101.268 120.004 123.104 1.00177.77 ATOM 209 O ILE C 68 100.520 119.833 124.073 1.00177.77 ATOM 210 CB ILE C 68 100.622 119.217 120.776 1.00177.77 ATOM 211 N LYS C 69 102.593 119.911 123.218 1.00203.85 ATOM 212 CA LYS C 69 103.181 119.584 124.511 1.00203.85 ATOM 213 C LYS C 69 102.916 120.689 125.524 1.00203.85 ATOM 214 O LYS C 69 102.597 120.420 126.694 1.00203.85 ATOM 215 CB LYS C 69 104.675 119.341 124.345 1.00203.85 ATOM 216 N LEU C 70 103.037 121.941 125.084 1.00193.99 ATOM 217 CA LEU C 70 102.734 123.074 125.943 1.00193.99 ATOM 218 C LEU C 70 101.350 122.934 126.561 1.00193.99 ATOM 219 O LEU C 70 101.206 122.851 127.784 1.00193.99 ATOM 220 CB LEU C 70 102.853 124.359 125.129 1.00193.99 ATOM 221 N ILE C 71 100.317 122.875 125.722 1.00208.30 ATOM 222 CA ILE C 71 98.958 122.820 126.252 1.00208.30 ATOM 223 C ILE C 71 98.736 121.527 127.014 1.00208.30 ATOM 224 O ILE C 71 97.819 121.427 127.833 1.00208.30 ATOM 225 CB ILE C 71 97.922 122.978 125.130 1.00208.30 ATOM 226 N HIS C 72 99.550 120.509 126.748 1.00197.91 ATOM 227 CA HIS C 72 99.385 119.275 127.495 1.00197.91 ATOM 228 C HIS C 72 99.938 119.366 128.901 1.00197.91 ATOM 229 O HIS C 72 99.546 118.562 129.753 1.00197.91 ATOM 230 CB HIS C 72 100.034 118.120 126.754 1.00197.91 ATOM 231 N ILE C 73 100.847 120.299 129.154 1.00195.15 ATOM 232 CA ILE C 73 101.371 120.474 130.511 1.00195.15 ATOM 233 C ILE C 73 100.229 120.524 131.529 1.00195.15 ATOM 234 O ILE C 73 100.164 119.659 132.419 1.00195.15 ATOM 235 CB ILE C 73 102.268 121.719 130.615 1.00195.15 ATOM 236 N PRO C 74 99.290 121.472 131.443 1.00197.65 ATOM 237 CA PRO C 74 98.259 121.530 132.483 1.00197.65 ATOM 238 C PRO C 74 97.287 120.377 132.411 1.00197.65 ATOM 239 O PRO C 74 96.766 119.963 133.451 1.00197.65 ATOM 240 CB PRO C 74 97.564 122.873 132.219 1.00197.65 ATOM 241 N ILE C 75 96.994 119.871 131.214 1.00187.36 ATOM 242 CA ILE C 75 96.234 118.632 131.105 1.00187.36 ATOM 243 C ILE C 75 96.904 117.552 131.929 1.00187.36 ATOM 244 O ILE C 75 96.264 116.857 132.724 1.00187.36 ATOM 245 CB ILE C 75 96.117 118.203 129.636 1.00187.36 ATOM 246 N ARG C 76 98.212 117.401 131.742 1.00193.73 ATOM 247 CA ARG C 76 98.969 116.448 132.537 1.00193.73 ATOM 248 C ARG C 76 98.769 116.699 134.022 1.00193.73 ATOM 249 O ARG C 76 98.608 115.755 134.804 1.00193.73 ATOM 250 CB ARG C 76 100.448 116.531 132.173 1.00193.73 ATOM 251 N TYR C 77 98.767 117.969 134.428 1.00223.57 ATOM 252 CA TYR C 77 98.567 118.286 135.839 1.00223.57 ATOM 253 C TYR C 77 97.198 117.822 136.323 1.00223.57 ATOM 254 O TYR C 77 97.074 117.207 137.387 1.00223.57 ATOM 255 CB TYR C 77 98.730 119.789 136.063 1.00223.57 ATOM 256 N VAL C 78 96.158 118.117 135.550 1.00197.63 ATOM 257 CA VAL C 78 94.803 118.058 136.082 1.00197.63 ATOM 258 C VAL C 78 94.212 116.666 135.940 1.00197.63 ATOM 259 O VAL C 78 93.470 116.207 136.814 1.00197.63 ATOM 260 CB VAL C 78 93.931 119.117 135.393 1.00197.63 ATOM 261 N ILE C 79 94.510 115.982 134.839 1.00209.45 ATOM 262 CA ILE C 79 93.966 114.648 134.624 1.00209.45 ATOM 263 C ILE C 79 94.334 113.739 135.782 1.00209.45 ATOM 264 O ILE C 79 93.461 113.172 136.448 1.00209.45 ATOM 265 CB ILE C 79 94.459 114.077 133.286 1.00209.45 ATOM 266 N VAL C 80 95.633 113.628 136.057 1.00221.62 ATOM 267 CA VAL C 80 96.201 112.762 137.091 1.00221.62 ATOM 268 C VAL C 80 95.401 111.481 137.312 1.00221.62 ATOM 269 O VAL C 80 94.984 110.827 136.354 1.00221.62 ATOM 270 CB VAL C 80 96.374 113.525 138.430 1.00221.62 TER