HEADER TRANSFERASE 31-DEC-69 6RL5 TITLE The first crystal structure of the DABA aminotransferase EctB in the TITLE 2 ectoine biosynthesis pathway of the model organism Chromohalobacter TITLE 3 salexigens DSM 3034 COMPND MOL_ID: 1; COMPND 2 MOLECULE: Diaminobutyrate--2-oxoglutarate transaminase; COMPND 3 CHAIN: A, B, C, D, E, F, G, H; COMPND 4 EC: 2.6.1.76; COMPND 5 ENGINEERED: YES; COMPND 6 Synthetic construct containing a 6xHIS C-terminal purification tag; COMPND 7 MOL_ID: 1; COMPND 8 Diaminobutyrate--2-oxoglutarate transaminase; COMPND 9 CHAIN: A, B, C, D, E, F, G, H; COMPND 10 EC: 2.6.1.76; COMPND 11 ENGINEERED: YES; COMPND 12 Synthetic construct containing a 6xHIS C-terminal purification tag; EXPDTA X-RAY DIFFRACTION REMARK 2 RESOLUTION. 2.45 ANGSTORMS DBREF 6RL5 G 1 423 UNP Q9ZEU7 ECTB_CHRSD 1 423 DBREF 6RL5 H 1 423 UNP Q9ZEU7 ECTB_CHRSD 1 423 SEQRES 1 H 301 GLN ILE LEU GLU ARG MET GLU SER GLU VAL ARG THR TYR SEQRES 2 H 301 SER ARG SER PHE PRO THR VAL PHE THR GLU ALA LYS GLY SEQRES 3 H 301 ALA ARG LEU HIS ALA GLU ASP GLY ASN GLN TYR ILE ASP SEQRES 4 H 301 PHE LEU ALA GLY ALA GLY THR LEU ASN TYR GLY HIS ASN SEQRES 5 H 301 HIS PRO LYS LEU LYS GLN ALA LEU ALA ASP TYR ILE ALA SEQRES 6 H 301 SER ASP GLY ILE VAL HIS GLY LEU ASP MET TRP SER ALA SEQRES 7 H 301 ALA LYS ARG ASP TYR LEU GLU THR LEU GLU GLU VAL ILE SEQRES 8 H 301 LEU LYS PRO ARG GLY LEU ASP TYR LYS VAL HIS LEU PRO SEQRES 9 H 301 GLY PRO THR GLY THR ASN ALA VAL GLU ALA ALA ILE ARG SEQRES 10 H 301 LEU ALA ARG ASN ALA LYS GLY ARG HIS ASN ILE VAL THR SEQRES 11 H 301 PHE THR ASN GLY PHE HIS GLY VAL THR MET GLY ALA LEU SEQRES 12 H 301 ALA THR THR GLY ASN ARG LYS PHE ARG GLU ALA THR GLY SEQRES 13 H 301 GLY ILE PRO THR GLN GLY ALA SER PHE MET PRO PHE ASP SEQRES 14 H 301 GLY TYR MET GLY GLU GLY VAL ASP THR LEU SER TYR PHE SEQRES 15 H 301 GLU LYS LEU LEU GLY ASP ASN SER GLY GLY LEU ASP VAL SEQRES 16 H 301 PRO ALA ALA VAL ILE ILE GLU THR VAL GLN GLY GLU GLY SEQRES 17 H 301 GLY ILE ASN PRO ALA GLY ILE PRO TRP LEU GLN ARG LEU SEQRES 18 H 301 GLU LYS ILE CYS ARG ASP HIS ASP MET LEU LEU ILE VAL SEQRES 19 H 301 ASP ASP ILE GLN ALA GLY CYS GLY ARG THR GLY LYS PHE SEQRES 20 H 301 PHE SER PHE GLU HIS ALA GLY ILE THR PRO ASP ILE VAL SEQRES 21 H 301 THR ASN SER LYS SER LEU SER GLY PHE GLY LEU PRO PHE SEQRES 22 H 301 ALA HIS VAL LEU MET ARG PRO GLU LEU ASP ILE TRP LYS SEQRES 23 H 301 PRO GLY GLN TYR ASN GLY THR PHE ARG GLY PHE ASN LEU SEQRES 24 H 301 ALA PHE SEQRES 1 H 14 ARG LYS GLY ARG VAL VAL GLU ASP ARG PHE GLN LYS LEU SEQRES 2 H 14 ALA ATOM 1 N ARG H 326 -62.189 -58.618 -86.001 1.00 55.94 ATOM 2 CA ARG H 326 -63.120 -57.636 -86.545 1.00 54.52 ATOM 3 C ARG H 326 -63.512 -56.595 -85.510 1.00 54.38 ATOM 4 O ARG H 326 -63.570 -55.394 -85.818 1.00 51.64 ATOM 5 CB ARG H 326 -64.361 -58.332 -87.077 1.00 55.50 ATOM 6 CG ARG H 326 -65.449 -57.400 -87.504 1.00 49.12 ATOM 7 CD ARG H 326 -66.655 -58.208 -87.806 1.00 50.35 ATOM 8 NE ARG H 326 -67.324 -58.664 -86.593 1.00 63.33 ATOM 9 CZ ARG H 326 -68.026 -57.867 -85.786 1.00 58.25 ATOM 10 NH1 ARG H 326 -68.133 -56.571 -86.056 1.00 53.98 ATOM 11 NH2 ARG H 326 -68.624 -58.367 -84.713 1.00 57.65 ATOM 12 N LYS H 327 -63.818 -57.028 -84.284 1.00 53.19 ATOM 13 CA LYS H 327 -64.177 -56.034 -83.287 1.00 51.74 ATOM 14 C LYS H 327 -63.004 -55.121 -83.022 1.00 49.54 ATOM 15 O LYS H 327 -63.191 -53.934 -82.743 1.00 48.56 ATOM 16 CB LYS H 327 -64.648 -56.691 -82.002 1.00 51.36 ATOM 17 CG LYS H 327 -66.055 -57.224 -82.071 1.00 49.09 ATOM 18 CD LYS H 327 -66.308 -58.150 -80.902 1.00 48.66 ATOM 19 CE LYS H 327 -67.399 -59.109 -81.221 1.00 55.52 ATOM 20 NZ LYS H 327 -67.457 -60.169 -80.209 1.00 58.30 ATOM 21 N GLY H 328 -61.787 -55.643 -83.157 1.00 49.04 ATOM 22 CA GLY H 328 -60.622 -54.788 -83.016 1.00 50.50 ATOM 23 C GLY H 328 -60.578 -53.695 -84.061 1.00 51.87 ATOM 24 O GLY H 328 -60.201 -52.556 -83.765 1.00 56.24 ATOM 25 N ARG H 329 -60.984 -54.020 -85.297 1.00 55.31 ATOM 26 CA ARG H 329 -61.065 -53.013 -86.357 1.00 51.28 ATOM 27 C ARG H 329 -62.124 -51.948 -86.052 1.00 56.80 ATOM 28 O ARG H 329 -61.916 -50.761 -86.340 1.00 61.61 ATOM 29 CB ARG H 329 -61.351 -53.697 -87.695 1.00 51.99 ATOM 30 CG ARG H 329 -60.138 -54.234 -88.444 1.00 48.23 ATOM 31 CD ARG H 329 -60.564 -55.161 -89.571 1.00 43.73 ATOM 32 NE ARG H 329 -59.865 -56.438 -89.475 1.00 49.93 ATOM 33 CZ ARG H 329 -60.464 -57.625 -89.395 1.00 57.60 ATOM 34 NH1 ARG H 329 -61.791 -57.709 -89.414 1.00 61.82 ATOM 35 NH2 ARG H 329 -59.744 -58.743 -89.309 1.00 61.66 ATOM 36 N VAL H 330 -63.260 -52.343 -85.457 1.00 53.25 ATOM 37 CA VAL H 330 -64.295 -51.368 -85.107 1.00 51.64 ATOM 38 C VAL H 330 -63.758 -50.325 -84.130 1.00 56.14 ATOM 39 O VAL H 330 -64.029 -49.123 -84.267 1.00 59.44 ATOM 40 CB VAL H 330 -65.539 -52.072 -84.534 1.00 52.12 ATOM 41 CG1 VAL H 330 -66.617 -51.057 -84.269 1.00 52.24 ATOM 42 CG2 VAL H 330 -66.053 -53.109 -85.481 1.00 49.75 ATOM 43 N VAL H 331 -63.006 -50.766 -83.118 1.00 57.43 ATOM 44 CA VAL H 331 -62.447 -49.842 -82.131 1.00 55.67 ATOM 45 C VAL H 331 -61.387 -48.954 -82.764 1.00 58.63 ATOM 46 O VAL H 331 -61.306 -47.754 -82.469 1.00 57.76 ATOM 47 CB VAL H 331 -61.863 -50.627 -80.946 1.00 54.96 ATOM 48 CG1 VAL H 331 -61.257 -49.683 -79.943 1.00 54.70 ATOM 49 CG2 VAL H 331 -62.933 -51.515 -80.315 1.00 49.75 ATOM 50 N GLU H 332 -60.541 -49.539 -83.624 1.00 60.05 ATOM 51 CA GLU H 332 -59.483 -48.774 -84.282 1.00 59.59 ATOM 52 C GLU H 332 -60.069 -47.618 -85.065 1.00 61.47 ATOM 53 O GLU H 332 -59.612 -46.476 -84.939 1.00 60.61 ATOM 54 CB GLU H 332 -58.660 -49.681 -85.204 1.00 62.24 ATOM 55 CG GLU H 332 -57.615 -48.931 -86.033 1.00 62.58 ATOM 56 CD GLU H 332 -56.751 -49.853 -86.898 1.00 71.42 ATOM 57 OE1 GLU H 332 -57.256 -50.934 -87.272 1.00 71.99 ATOM 58 OE2 GLU H 332 -55.572 -49.499 -87.195 1.00 70.73 ATOM 59 N ASP H 333 -61.108 -47.899 -85.865 1.00 63.77 ATOM 60 CA ASP H 333 -61.784 -46.853 -86.631 1.00 64.34 ATOM 61 C ASP H 333 -62.229 -45.709 -85.723 1.00 66.18 ATOM 62 O ASP H 333 -61.867 -44.544 -85.937 1.00 66.92 ATOM 63 CB ASP H 333 -62.974 -47.463 -87.378 1.00 61.88 ATOM 64 CG ASP H 333 -63.669 -46.472 -88.282 1.00 71.75 ATOM 65 OD1 ASP H 333 -62.966 -45.789 -89.054 1.00 77.82 ATOM 66 OD2 ASP H 333 -64.921 -46.376 -88.224 1.00 75.17 ATOM 67 N ARG H 334 -62.965 -46.039 -84.660 1.00 63.14 ATOM 68 CA ARG H 334 -63.569 -45.004 -83.828 1.00 65.49 ATOM 69 C ARG H 334 -62.534 -44.269 -82.982 1.00 68.96 ATOM 70 O ARG H 334 -62.660 -43.054 -82.758 1.00 66.76 ATOM 71 CB ARG H 334 -64.647 -45.627 -82.954 1.00 62.61 ATOM 72 CG ARG H 334 -65.799 -46.142 -83.767 1.00 62.93 ATOM 73 CD ARG H 334 -66.742 -45.008 -84.100 1.00 59.29 ATOM 74 NE ARG H 334 -67.895 -45.035 -83.213 1.00 59.84 ATOM 75 CZ ARG H 334 -68.223 -44.047 -82.395 1.00 64.16 ATOM 76 NH1 ARG H 334 -67.489 -42.942 -82.356 1.00 63.56 ATOM 77 NH2 ARG H 334 -69.286 -44.171 -81.615 1.00 68.03 ATOM 78 N PHE H 335 -61.509 -44.978 -82.489 1.00 65.09 ATOM 79 CA PHE H 335 -60.441 -44.283 -81.775 1.00 63.43 ATOM 80 C PHE H 335 -59.726 -43.312 -82.699 1.00 62.76 ATOM 81 O PHE H 335 -59.379 -42.198 -82.289 1.00 64.14 ATOM 82 CB PHE H 335 -59.443 -45.280 -81.174 1.00 59.30 ATOM 83 CG PHE H 335 -59.814 -45.772 -79.794 1.00 60.54 ATOM 84 CD1 PHE H 335 -61.137 -45.723 -79.347 1.00 57.19 ATOM 85 CD2 PHE H 335 -58.847 -46.312 -78.958 1.00 55.19 ATOM 86 CE1 PHE H 335 -61.478 -46.189 -78.085 1.00 53.35 ATOM 87 CE2 PHE H 335 -59.180 -46.782 -77.696 1.00 59.18 ATOM 88 CZ PHE H 335 -60.504 -46.721 -77.255 1.00 51.84 ATOM 89 N GLN H 336 -59.508 -43.718 -83.957 1.00 62.87 ATOM 90 CA GLN H 336 -58.835 -42.852 -84.924 1.00 63.51 ATOM 91 C GLN H 336 -59.656 -41.595 -85.192 1.00 69.21 ATOM 92 O GLN H 336 -59.150 -40.469 -85.073 1.00 69.39 ATOM 93 CB GLN H 336 -58.569 -43.622 -86.222 1.00 62.57 ATOM 94 CG GLN H 336 -57.310 -44.465 -86.163 1.00 64.92 ATOM 95 CD GLN H 336 -57.204 -45.485 -87.279 1.00 67.81 ATOM 96 OE1 GLN H 336 -58.131 -45.669 -88.078 1.00 70.90 ATOM 97 NE2 GLN H 336 -56.061 -46.158 -87.343 1.00 67.75 ATOM 98 N LYS H 337 -60.934 -41.771 -85.544 1.00 66.64 ATOM 99 CA LYS H 337 -61.834 -40.630 -85.667 1.00 67.23 ATOM 100 C LYS H 337 -61.791 -39.759 -84.414 1.00 67.38 ATOM 101 O LYS H 337 -61.716 -38.529 -84.507 1.00 67.24 ATOM 102 CB LYS H 337 -63.250 -41.126 -85.957 1.00 60.43 ATOM 103 CG LYS H 337 -63.318 -41.988 -87.206 1.00 66.57 ATOM 104 CD LYS H 337 -64.749 -42.333 -87.611 1.00 66.86 ATOM 105 CE LYS H 337 -64.775 -43.042 -88.959 1.00 63.60 ATOM 106 NZ LYS H 337 -66.111 -43.630 -89.236 1.00 75.93 ATOM 107 N LEU H 338 -61.800 -40.385 -83.232 1.00 66.98 ATOM 108 CA LEU H 338 -61.739 -39.625 -81.985 1.00 66.20 ATOM 109 C LEU H 338 -60.430 -38.857 -81.871 1.00 70.81 ATOM 110 O LEU H 338 -60.420 -37.663 -81.550 1.00 68.49 ATOM 111 CB LEU H 338 -61.907 -40.565 -80.798 1.00 63.65 ATOM 112 CG LEU H 338 -63.247 -40.292 -80.148 1.00 62.93 ATOM 113 CD1 LEU H 338 -63.500 -41.183 -78.953 1.00 60.18 ATOM 114 CD2 LEU H 338 -63.270 -38.839 -79.756 1.00 70.70 ATOM 115 N ALA H 339 -59.309 -39.541 -82.118 1.00 74.10 ATOM 116 CA ALA H 339 -58.010 -38.879 -82.133 1.00 67.31 ATOM 117 C ALA H 339 -57.972 -37.751 -83.153 1.00 65.32 ATOM 118 O ALA H 339 -57.210 -36.797 -82.990 1.00 72.05 ATOM 119 CB ALA H 339 -56.914 -39.902 -82.414 1.00 63.75 ATOM 120 N1 PLP H -46.142 -68.165 -44.582 1.00 58.54 ATOM 121 C2 PLP H -46.337 -69.374 -43.909 1.00 61.78 ATOM 122 C2A PLP H -46.287 -69.400 -42.399 1.00 53.71 ATOM 123 C3 PLP H -46.568 -70.560 -44.640 1.00 60.30 ATOM 124 O3 PLP H -46.767 -71.774 -44.001 1.00 63.35 ATOM 125 C4 PLP H -46.631 -70.526 -46.035 1.00 58.33 ATOM 126 C4A PLP H -47.640 -71.499 -46.610 1.00 62.96 ATOM 127 C5 PLP H -46.412 -69.290 -46.706 1.00 63.26 ATOM 128 C6 PLP H -46.178 -68.116 -45.976 1.00 56.40 ATOM 129 C5A PLP H -46.429 -69.197 -48.230 1.00 55.59 ATOM 130 O4P PLP H -47.669 -68.773 -48.771 1.00 66.64 ATOM 131 P PLP H -48.229 -69.341 -50.180 1.00 68.31 ATOM 132 O1P PLP H -47.522 -68.667 -51.345 1.00 60.38 ATOM 133 O2P PLP H -47.890 -70.819 -50.205 1.00 71.74 ATOM 134 O3P PLP H -49.747 -69.149 -50.272 1.00 64.35 ATOM 135 N1 PLP H -47.476 -58.871 -66.061 1.00 60.76 ATOM 136 C2 PLP H -48.438 -58.135 -66.745 1.00 66.49 ATOM 137 C2A PLP H -48.144 -57.784 -68.180 1.00 57.29 ATOM 138 C3 PLP H -49.646 -57.763 -66.097 1.00 69.39 ATOM 139 O3 PLP H -50.645 -57.047 -66.713 1.00 63.88 ATOM 140 C4 PLP H -49.852 -58.127 -64.766 1.00 69.77 ATOM 141 C4A PLP H -50.912 -57.369 -64.020 1.00 70.45 ATOM 142 C5 PLP H -48.855 -58.866 -64.092 1.00 61.34 ATOM 143 C6 PLP H -47.679 -59.240 -64.739 1.00 58.49 ATOM 144 C5A PLP H -49.008 -59.276 -62.661 1.00 60.81 ATOM 145 O4P PLP H -50.310 -59.747 -62.461 1.00 72.86 ATOM 146 P PLP H -50.825 -59.936 -60.957 1.00 86.22 ATOM 147 O1P PLP H -51.804 -61.118 -60.951 1.00 70.19 ATOM 148 O2P PLP H -49.612 -60.118 -60.060 1.00 76.72 ATOM 149 O3P PLP H -51.466 -58.624 -60.561 1.00 82.13 TER