HEADER IMMUNE SYSTEM 20-SEP-07 2RCJ TITLE Solution structure of human Immunoglobulin M COMPND MOL_ID: 3; COMPND 2 MOLECULE: J chain; COMPND 3 CHAIN: U; EXPDTA SOLUTION SCATTERING DBREF 2RCJ U 1 104 PDB 2RCJ 2RCJ 1 104 SEQRES 1 U 102 SER THR LYS GLY PRO SER VAL PHE PRO LEU ALA PRO SER SEQRES 2 U 102 SER LYS SER THR SER GLY GLY THR ALA ALA LEU GLY CYS SEQRES 3 U 102 LEU VAL LYS ASP TYR PHE PRO GLN PRO VAL THR VAL SER SEQRES 4 U 102 TRP ASN SER GLY ALA LEU THR SER GLY VAL HIS THR PHE SEQRES 5 U 102 PRO ALA VAL LEU GLN SER SER GLY LEU TYR SER LEU SER SEQRES 6 U 102 SER VAL VAL THR VAL PRO SER SER SER LEU GLY THR GLN SEQRES 7 U 102 THR TYR ILE CYS ASN VAL ASN HIS LYS PRO SER ASN THR SEQRES 8 U 102 LYS VAL ASP LYS ARG VAL GLU PRO LYS SER CYS ATOM 1 CA SER U 3 -3.662 -46.938 3.263 1.00 20.00 ATOM 2 CA THR U 4 -2.886 -44.584 0.412 1.00 20.00 ATOM 3 CA LYS U 5 -5.361 -41.698 0.387 1.00 20.00 ATOM 4 CA GLY U 6 -5.253 -38.746 -2.018 1.00 20.00 ATOM 5 CA PRO U 7 -5.825 -35.302 -0.441 1.00 20.00 ATOM 6 CA SER U 8 -8.863 -33.130 -0.289 1.00 20.00 ATOM 7 CA VAL U 9 -7.898 -29.663 -1.509 1.00 20.00 ATOM 8 CA PHE U 10 -9.534 -26.505 -0.102 1.00 20.00 ATOM 9 CA PRO U 11 -8.764 -22.919 -0.967 1.00 20.00 ATOM 10 CA LEU U 12 -7.885 -20.583 1.926 1.00 20.00 ATOM 11 CA ALA U 13 -9.332 -17.383 0.544 1.00 20.00 ATOM 12 CA PRO U 14 -7.697 -13.987 1.088 1.00 20.00 ATOM 13 CA SER U 15 -9.579 -12.046 3.789 1.00 20.00 ATOM 14 CA SER U 16 -11.230 -8.645 3.169 1.00 20.00 ATOM 15 CA LYS U 17 -10.156 -7.673 6.654 1.00 20.00 ATOM 16 CA SER U 18 -7.166 -5.446 6.179 1.00 20.00 ATOM 17 CA THR U 19 -3.872 -5.901 7.966 1.00 20.00 ATOM 18 CA SER U 20 -1.263 -3.322 8.996 1.00 20.00 ATOM 19 CA GLY U 21 1.188 -3.462 6.085 1.00 20.00 ATOM 20 CA GLY U 22 1.284 -4.449 2.408 1.00 20.00 ATOM 21 CA THR U 23 0.114 -7.979 3.152 1.00 20.00 ATOM 22 CA ALA U 24 -2.688 -10.211 2.002 1.00 20.00 ATOM 23 CA ALA U 25 -2.408 -13.894 2.765 1.00 20.00 ATOM 24 CA LEU U 26 -3.986 -16.641 0.731 1.00 20.00 ATOM 25 CA GLY U 27 -3.332 -20.401 0.596 1.00 20.00 ATOM 26 CA CYS U 28 -4.415 -24.008 0.127 1.00 20.00 ATOM 27 CA LEU U 29 -5.362 -26.651 2.653 1.00 20.00 ATOM 28 CA VAL U 30 -4.174 -30.103 1.668 1.00 20.00 ATOM 29 CA LYS U 31 -6.117 -32.242 3.942 1.00 20.00 ATOM 30 CA ASP U 32 -6.061 -35.932 5.040 1.00 20.00 ATOM 31 CA TYR U 33 -3.570 -37.626 2.694 1.00 20.00 ATOM 32 CA PHE U 34 -1.297 -40.698 2.974 1.00 20.00 ATOM 33 CA PRO U 35 1.528 -41.074 2.636 1.00 20.00 ATOM 34 CA GLN U 36 3.933 -38.149 2.476 1.00 20.00 ATOM 35 CA PRO U 37 4.989 -36.340 0.575 1.00 20.00 ATOM 36 CA VAL U 38 2.847 -33.974 -1.480 1.00 20.00 ATOM 37 CA THR U 39 4.036 -31.396 -3.963 1.00 20.00 ATOM 38 CA VAL U 40 2.431 -27.951 -3.972 1.00 20.00 ATOM 39 CA SER U 41 3.356 -25.188 -6.353 1.00 20.00 ATOM 40 CA TRP U 42 1.602 -21.891 -7.298 1.00 20.00 ATOM 41 CA ASN U 43 0.554 -20.674 -10.710 1.00 20.00 ATOM 42 CA SER U 44 2.169 -23.739 -12.030 1.00 20.00 ATOM 43 CA GLY U 45 5.384 -22.879 -10.284 1.00 20.00 ATOM 44 CA ALA U 46 5.533 -19.546 -12.086 1.00 20.00 ATOM 45 CA LEU U 47 5.050 -18.080 -8.589 1.00 20.00 ATOM 46 CA THR U 48 7.742 -18.606 -6.055 1.00 20.00 ATOM 47 CA SER U 49 7.853 -15.210 -4.451 1.00 20.00 ATOM 48 CA GLY U 50 6.404 -15.221 -0.929 1.00 20.00 ATOM 49 CA VAL U 51 5.196 -18.774 -0.883 1.00 20.00 ATOM 50 CA HIS U 52 5.451 -20.569 2.435 1.00 20.00 ATOM 51 CA THR U 53 4.458 -24.267 2.584 1.00 20.00 ATOM 52 CA PHE U 54 4.384 -25.515 6.153 1.00 20.00 ATOM 53 CA PRO U 55 5.382 -28.867 7.526 1.00 20.00 ATOM 54 CA ALA U 56 2.453 -31.262 7.514 1.00 20.00 ATOM 55 CA VAL U 57 0.600 -32.354 10.693 1.00 20.00 ATOM 56 CA LEU U 58 0.248 -36.131 11.368 1.00 20.00 ATOM 57 CA GLN U 59 -3.222 -36.408 12.722 1.00 20.00 ATOM 58 CA SER U 60 -4.583 -39.051 15.100 1.00 20.00 ATOM 59 CA SER U 61 -6.178 -40.584 11.997 1.00 20.00 ATOM 60 CA GLY U 62 -2.881 -41.643 10.656 1.00 20.00 ATOM 61 CA LEU U 63 -3.435 -39.139 7.863 1.00 20.00 ATOM 62 CA TYR U 64 -1.543 -35.925 7.104 1.00 20.00 ATOM 63 CA SER U 65 -2.608 -32.373 6.399 1.00 20.00 ATOM 64 CA LEU U 66 -0.541 -29.394 5.280 1.00 20.00 ATOM 65 CA SER U 67 -0.976 -25.727 4.427 1.00 20.00 ATOM 66 CA SER U 68 0.751 -23.631 1.792 1.00 20.00 ATOM 67 CA VAL U 69 0.369 -19.842 1.909 1.00 20.00 ATOM 68 CA VAL U 70 1.309 -16.931 -0.281 1.00 20.00 ATOM 69 CA THR U 71 1.672 -13.504 1.211 1.00 20.00 ATOM 70 CA VAL U 72 0.948 -11.026 -1.588 1.00 20.00 ATOM 71 CA PRO U 73 0.688 -7.185 -1.681 1.00 20.00 ATOM 72 CA SER U 74 -2.975 -6.529 -1.189 1.00 20.00 ATOM 73 CA SER U 75 -3.090 -4.316 -4.300 1.00 20.00 ATOM 74 CA SER U 76 -2.726 -7.397 -6.557 1.00 20.00 ATOM 75 CA LEU U 77 -5.448 -9.380 -4.916 1.00 20.00 ATOM 76 CA GLY U 78 -8.164 -9.229 -7.455 1.00 20.00 ATOM 77 CA THR U 79 -5.861 -7.771 -10.139 1.00 20.00 ATOM 78 CA GLN U 80 -4.308 -11.258 -10.459 1.00 20.00 ATOM 79 CA THR U 81 -5.121 -15.024 -10.365 1.00 20.00 ATOM 80 CA TYR U 82 -3.764 -17.579 -7.916 1.00 20.00 ATOM 81 CA ILE U 83 -4.087 -21.310 -8.300 1.00 20.00 ATOM 82 CA CYS U 84 -2.298 -23.909 -6.214 1.00 20.00 ATOM 83 CA ASN U 85 -1.245 -27.071 -8.072 1.00 20.00 ATOM 84 CA VAL U 86 -1.293 -30.109 -5.817 1.00 20.00 ATOM 85 CA ASN U 87 0.350 -33.364 -6.799 1.00 20.00 ATOM 86 CA HIS U 88 0.134 -36.456 -4.674 1.00 20.00 ATOM 87 CA LYS U 89 2.306 -38.946 -6.568 1.00 20.00 ATOM 88 CA PRO U 90 1.539 -42.066 -4.410 1.00 20.00 ATOM 89 CA SER U 91 -2.182 -41.831 -5.233 1.00 20.00 ATOM 90 CA ASN U 92 -1.745 -40.089 -8.538 1.00 20.00 ATOM 91 CA THR U 93 -4.085 -37.337 -7.282 1.00 20.00 ATOM 92 CA LYS U 94 -3.465 -34.082 -9.181 1.00 20.00 ATOM 93 CA VAL U 95 -5.640 -31.109 -8.205 1.00 20.00 ATOM 94 CA ASP U 96 -5.568 -27.413 -9.109 1.00 20.00 ATOM 95 CA LYS U 97 -7.511 -25.146 -6.840 1.00 20.00 ATOM 96 CA ARG U 98 -8.263 -21.530 -7.897 1.00 20.00 ATOM 97 CA VAL U 99 -7.992 -19.267 -4.853 1.00 20.00 ATOM 98 CA GLU U 100 -10.297 -16.337 -5.074 1.00 20.00 ATOM 99 CA PRO U 101 -11.396 -13.374 -2.912 1.00 20.00 ATOM 100 CA LYS U 102 -14.813 -13.933 -1.357 1.00 20.00 ATOM 101 CA SER U 103 -17.712 -11.966 -2.893 1.00 20.00 ATOM 102 CA CYS U 104 -17.372 -9.273 -0.221 1.00 20.00 TER