HEADER GROWTH FACTOR 08-OCT-93 1POS TITLE CRYSTAL STRUCTURE OF A NOVEL DISULFIDE-LINKED "TREFOIL" MOTIF FOUND TITLE 2 IN A LARGE FAMILY OF PUTATIVE GROWTH FACTORS COMPND MOL_ID: 1; COMPND 2 MOLECULE: PORCINE PANCREATIC SPASMOLYTIC POLYPEPTIDE; COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.60 ANGSTORMS DBREF 1POS B 2 106 UNP P01359 TFF2_PIG 23 127 MODRES 1POS PCA B 1 GLU PYROGLUTAMIC ACID SEQRES 1 B 53 GLU SER GLU GLU CYS VAL MET GLN VAL SER ALA ARG LYS SEQRES 2 B 53 ASN CYS GLY TYR PRO GLY ILE SER PRO GLU ASP CYS ALA SEQRES 3 B 53 ALA ARG ASN CYS CYS PHE SER ASP THR ILE PRO GLU VAL SEQRES 4 B 53 PRO TRP CYS PHE PHE PRO MET SER VAL GLU ASP CYS HIS SEQRES 5 B 53 TYR ATOM 1 CA GLU B 54 52.274 16.357 4.672 1.00 43.20 ATOM 2 CA SER B 55 50.937 12.820 5.069 1.00 38.78 ATOM 3 CA GLU B 56 48.870 11.218 7.805 1.00 39.56 ATOM 4 CA GLU B 57 51.410 8.508 8.745 1.00 34.93 ATOM 5 CA CYS B 58 53.647 11.363 9.831 1.00 28.36 ATOM 6 CA VAL B 59 51.073 12.654 12.307 1.00 27.97 ATOM 7 CA MET B 60 51.994 11.983 15.916 1.00 27.29 ATOM 8 CA GLN B 61 53.057 13.715 19.093 1.00 28.03 ATOM 9 CA VAL B 62 56.511 15.404 18.885 1.00 21.83 ATOM 10 CA SER B 63 57.808 13.262 21.777 1.00 32.77 ATOM 11 CA ALA B 64 56.625 10.149 19.869 1.00 31.29 ATOM 12 CA ARG B 65 58.886 10.743 16.852 1.00 23.11 ATOM 13 CA LYS B 66 61.422 7.923 16.358 1.00 32.54 ATOM 14 CA ASN B 67 64.500 9.598 14.865 1.00 35.11 ATOM 15 CA CYS B 68 65.290 8.136 11.474 1.00 34.94 ATOM 16 CA GLY B 69 67.987 10.358 9.985 1.00 31.53 ATOM 17 CA TYR B 70 70.887 12.326 11.502 1.00 25.01 ATOM 18 CA PRO B 71 71.590 15.979 12.286 1.00 28.25 ATOM 19 CA GLY B 72 71.371 17.983 9.088 1.00 30.89 ATOM 20 CA ILE B 73 69.865 15.167 7.005 1.00 27.33 ATOM 21 CA SER B 74 67.991 17.181 4.443 1.00 28.74 ATOM 22 CA PRO B 75 64.380 16.896 3.212 1.00 25.35 ATOM 23 CA GLU B 76 65.522 15.047 0.121 1.00 37.08 ATOM 24 CA ASP B 77 67.574 12.278 1.682 1.00 36.45 ATOM 25 CA CYS B 78 65.360 11.983 4.678 1.00 35.93 ATOM 26 CA ALA B 79 62.504 11.248 2.277 1.00 39.56 ATOM 27 CA ALA B 80 64.743 8.998 0.220 1.00 41.85 ATOM 28 CA ARG B 81 64.817 6.854 3.408 1.00 49.36 ATOM 29 CA ASN B 82 61.013 6.789 3.388 1.00 49.83 ATOM 30 CA CYS B 83 60.717 8.677 6.624 1.00 35.53 ATOM 31 CA CYS B 84 58.824 11.828 7.644 1.00 26.35 ATOM 32 CA PHE B 85 60.627 15.146 7.737 1.00 21.75 ATOM 33 CA SER B 86 59.522 18.178 9.650 1.00 22.82 ATOM 34 CA ASP B 87 61.605 21.148 10.722 1.00 16.88 ATOM 35 CA THR B 88 59.011 23.408 12.417 1.00 14.57 ATOM 36 CA ILE B 89 60.033 22.558 15.991 1.00 12.73 ATOM 37 CA PRO B 90 63.635 23.063 17.199 1.00 11.33 ATOM 38 CA GLU B 91 65.746 20.650 19.230 1.00 15.88 ATOM 39 CA VAL B 92 63.911 17.537 18.132 1.00 9.48 ATOM 40 CA PRO B 93 64.147 15.013 15.287 1.00 11.83 ATOM 41 CA TRP B 94 63.416 16.636 11.892 1.00 5.93 ATOM 42 CA CYS B 95 63.293 13.173 10.312 1.00 13.83 ATOM 43 CA PHE B 96 61.435 10.264 11.809 1.00 22.31 ATOM 44 CA PHE B 97 59.625 6.999 11.206 1.00 31.73 ATOM 45 CA PRO B 98 56.066 7.495 9.993 1.00 37.39 ATOM 46 CA MET B 99 53.283 5.717 11.850 1.00 43.69 ATOM 47 CA SER B 100 50.851 3.592 9.930 1.00 54.07 ATOM 48 CA VAL B 101 47.570 5.503 9.558 1.00 55.98 ATOM 49 CA GLU B 102 45.331 2.701 10.979 1.00 56.21 ATOM 50 CA ASP B 103 45.271 3.422 14.730 1.00 52.03 ATOM 51 CA CYS B 104 43.386 6.591 13.925 1.00 42.78 ATOM 52 CA HIS B 105 39.671 7.238 14.311 1.00 46.92 ATOM 53 CA TYR B 106 37.430 9.991 15.609 1.00 42.27 TER