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 LYS PRO ALA ALA CYS ARG CYS SER ARG GLN ASP PRO SEQRES 2 B 53 LYS ASN ARG VAL ASN CYS GLY PHE PRO GLY ILE THR SER SEQRES 3 B 53 ASP GLN CYS PHE THR SER GLY CYS CYS PHE ASP SER GLN SEQRES 4 B 53 VAL PRO GLY VAL PRO TRP CYS PHE LYS PRO LEU PRO ALA SEQRES 5 B 53 GLN ATOM 1 CA PCA B 1 37.868 22.899 9.000 1.00 40.62 ATOM 2 CA LYS B 2 37.466 19.095 9.572 1.00 32.52 ATOM 3 CA PRO B 3 40.651 17.604 11.103 1.00 31.55 ATOM 4 CA ALA B 4 41.812 14.226 9.946 1.00 27.87 ATOM 5 CA ALA B 5 41.519 11.280 12.277 1.00 28.40 ATOM 6 CA CYS B 6 45.176 10.920 13.265 1.00 23.46 ATOM 7 CA ARG B 7 45.467 14.617 14.168 1.00 14.81 ATOM 8 CA CYS B 8 42.891 13.770 16.880 1.00 17.81 ATOM 9 CA SER B 9 43.367 10.125 17.680 1.00 19.35 ATOM 10 CA ARG B 10 47.162 10.344 18.055 1.00 28.85 ATOM 11 CA GLN B 11 47.186 12.428 21.222 1.00 28.69 ATOM 12 CA ASP B 12 46.763 11.267 24.822 1.00 25.23 ATOM 13 CA PRO B 13 43.446 12.549 26.195 1.00 18.54 ATOM 14 CA LYS B 14 45.222 13.834 29.230 1.00 27.57 ATOM 15 CA ASN B 15 46.958 16.535 27.305 1.00 29.46 ATOM 16 CA ARG B 16 44.059 17.562 25.111 1.00 21.54 ATOM 17 CA VAL B 17 43.586 21.322 24.718 1.00 23.01 ATOM 18 CA ASN B 18 40.209 23.057 24.909 1.00 28.44 ATOM 19 CA CYS B 19 38.821 24.110 21.556 1.00 24.33 ATOM 20 CA GLY B 20 35.556 26.106 21.404 1.00 29.29 ATOM 21 CA PHE B 21 32.815 27.370 23.773 1.00 31.95 ATOM 22 CA PRO B 22 31.297 24.851 26.168 1.00 34.74 ATOM 23 CA GLY B 23 28.445 22.692 24.948 1.00 33.34 ATOM 24 CA ILE B 24 29.613 23.257 21.397 1.00 29.26 ATOM 25 CA THR B 25 28.362 20.360 19.307 1.00 31.00 ATOM 26 CA SER B 26 30.047 17.547 17.465 1.00 29.47 ATOM 27 CA ASP B 27 29.471 19.143 14.066 1.00 32.04 ATOM 28 CA GLN B 28 30.644 22.622 14.944 1.00 26.22 ATOM 29 CA CYS B 29 33.724 21.374 16.842 1.00 19.39 ATOM 30 CA PHE B 30 34.725 19.533 13.723 1.00 13.90 ATOM 31 CA THR B 31 34.002 22.394 11.347 1.00 21.52 ATOM 32 CA SER B 32 35.836 25.000 13.376 1.00 25.52 ATOM 33 CA GLY B 33 38.655 22.565 12.701 1.00 20.64 ATOM 34 CA CYS B 34 38.927 20.806 16.033 1.00 13.18 ATOM 35 CA CYS B 35 38.486 17.298 17.171 1.00 14.58 ATOM 36 CA PHE B 36 35.404 16.130 19.064 1.00 15.16 ATOM 37 CA ASP B 37 35.504 13.117 21.370 1.00 18.42 ATOM 38 CA SER B 38 33.049 12.394 24.155 1.00 24.40 ATOM 39 CA GLN B 39 34.008 8.853 24.989 1.00 34.53 ATOM 40 CA VAL B 40 36.519 10.159 27.575 1.00 28.46 ATOM 41 CA PRO B 41 35.759 11.567 31.097 1.00 24.49 ATOM 42 CA GLY B 42 38.104 14.147 32.572 1.00 24.39 ATOM 43 CA VAL B 43 39.160 15.716 29.333 1.00 18.22 ATOM 44 CA PRO B 44 37.996 18.295 26.858 1.00 14.21 ATOM 45 CA TRP B 45 35.533 16.988 24.290 1.00 18.47 ATOM 46 CA CYS B 46 36.299 19.565 21.665 1.00 11.37 ATOM 47 CA PHE B 47 40.133 19.771 21.526 1.00 12.25 ATOM 48 CA LYS B 48 42.697 21.380 19.194 1.00 12.57 ATOM 49 CA PRO B 49 44.269 18.750 16.935 1.00 16.00 ATOM 50 CA LEU B 50 47.860 17.642 16.207 1.00 13.99 ATOM 51 CA PRO B 51 49.425 19.861 13.515 1.00 15.40 ATOM 52 CA ALA B 52 48.964 18.852 9.888 1.00 25.42 ATOM 53 CA GLN B 53 51.705 16.755 8.399 1.00 35.90 TER