0.007338 0.000000 0.000000 0.000000 0.007338 0.000000 0.000000 0.000000 0.007338 0.00000 0.00000 0.00000 Phan, J. Mahdavian, E. Nivens, M.C. 0000-0001-7075-7090 Minor, W. Berger, S. Spencer, H.T. Dunlap, R.B. Lebioda, L. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 24 90.00 90.00 90.00 136.274 136.274 136.274 C3 H7 N O2 89.093 y ALANINE L-peptide linking C6 H15 N4 O2 1 175.209 y ARGININE L-peptide linking C4 H8 N2 O3 132.118 y ASPARAGINE L-peptide linking C4 H7 N O4 133.103 y ASPARTIC ACID L-peptide linking C5 H11 N O3 S2 197.276 n S,S-(2-HYDROXYETHYL)THIOCYSTEINE L-peptide linking C6 H11 N O4 S 193.221 n N-CARBOXYMETHIONINE L-peptide linking C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H10 N3 O2 1 156.162 y HISTIDINE L-peptide linking H2 O 18.015 WATER non-polymer C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking C5 H11 N O2 S 149.211 y METHIONINE L-peptide linking C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking C5 H9 N O2 115.130 y PROLINE L-peptide linking C3 H7 N O3 105.093 y SERINE L-peptide linking C4 H9 N O3 119.119 y THREONINE L-peptide linking C11 H12 N2 O2 204.225 y TRYPTOPHAN L-peptide linking C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking US Biochemistry BICHAW 0033 0006-2960 39 6969 6978 10.1021/bi000367g 10841779 Catalytic cysteine of thymidylate synthase is activated upon substrate binding. 2000 0000-0001-7075-7090 10.2210/pdb1ev8/pdb pdb_00001ev8 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 95 1 IMAGE PLATE 1998-11-25 RIGAKU RAXIS SINGLE WAVELENGTH M x-ray 1 1.5418 1.0 1.5418 ROTATING ANODE RIGAKU RU200 30880.197 THYMIDYLATE SYNTHASE 2.1.1.45 S167C 1 man polymer 18.015 water 11 nat water no yes (CXM)KQYLELMQKVLDEGTQKNDRTGTGTLSIFGHQMRFNLQDGFPLVTTKR(CME)HLRSIIHELLWFLQGDTNIAYL HENNVTIWDEWADENGDLGPVYGKQWRAWPTPDGRHIDQITTVLNQLKNDPDSRRIIVSAWNVGELDKMALAP(CME)HA FFQFYVADGKLSCQLYQRC(CME)DVFLGLPFNIASYALLVHMMAQQ(CME)DLEVGDFVWTGGDTHLYSNHMDQTHLQL SREPRPLPKLIIKRKPESIFDYRFEDFEIEGYDPHPGIKAPVAI MKQYLELMQKVLDEGTQKNDRTGTGTLSIFGHQMRFNLQDGFPLVTTKRCHLRSIIHELLWFLQGDTNIAYLHENNVTIW DEWADENGDLGPVYGKQWRAWPTPDGRHIDQITTVLNQLKNDPDSRRIIVSAWNVGELDKMALAPCHAFFQFYVADGKLS CQLYQRCCDVFLGLPFNIASYALLVHMMAQQCDLEVGDFVWTGGDTHLYSNHMDQTHLQLSREPRPLPKLIIKRKPESIF DYRFEDFEIEGYDPHPGIKAPVAI A polypeptide(L) n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n Escherichia Escherichia sample 562 Escherichia coli 562 Escherichia coli PBLUESCRIPT SK 1 3.41 63.96 VAPOR DIFFUSION, HANGING DROP 8.5 68% saturated ammonium sulfate, 100 mM sodium phosphate, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 18K 291.0 software exptl_crystal_grow database_2 struct_conn struct_ref_seq_dif audit_author citation_author repository Initial release Version format compliance Derived calculations Version format compliance Refinement description Experimental preparation Database references Derived calculations Database references Structure summary 1 0 2000-05-03 1 1 2008-04-27 1 2 2011-07-13 1 3 2017-10-04 1 4 2018-01-31 1 5 2021-11-03 1 6 2022-04-13 _exptl_crystal_grow.pdbx_details _exptl_crystal_grow.temp _database_2.pdbx_DOI _database_2.pdbx_database_accession _struct_conn.pdbx_leaving_atom_flag _struct_ref_seq_dif.details _audit_author.identifier_ORCID _citation_author.identifier_ORCID S167A MUTANT of E. coli Thymidylate Synthase (modified catalytic cysteine) S167T MUTANT of E. coli Thymidylate Synthase (modified catalytic cysteine) S167T MUTANT of E. coli Thymidylate Synthase (unmodified catalytic cysteine) RCSB Y RCSB 2000-04-19 REL REL HOH water HOH 1 2 HOH HOH 265 A HOH 2 2 HOH HOH 266 A HOH 3 2 HOH HOH 267 A HOH 4 2 HOH HOH 268 A HOH 5 2 HOH HOH 269 A HOH 6 2 HOH HOH 270 A HOH 7 2 HOH HOH 271 A HOH 8 2 HOH HOH 272 A HOH 9 2 HOH HOH 273 A HOH 10 2 HOH HOH 274 A HOH 11 2 HOH HOH 275 A CXM 1 n 1 CXM 1 A LYS 2 n 2 LYS 2 A GLN 3 n 3 GLN 3 A TYR 4 n 4 TYR 4 A LEU 5 n 5 LEU 5 A GLU 6 n 6 GLU 6 A LEU 7 n 7 LEU 7 A MET 8 n 8 MET 8 A GLN 9 n 9 GLN 9 A LYS 10 n 10 LYS 10 A VAL 11 n 11 VAL 11 A LEU 12 n 12 LEU 12 A ASP 13 n 13 ASP 13 A GLU 14 n 14 GLU 14 A GLY 15 n 15 GLY 15 A THR 16 n 16 THR 16 A GLU 17 n 17 GLN 17 A LYS 18 n 18 LYS 18 A ASN 19 n 19 ASN 19 A ASP 20 n 20 ASP 20 A ARG 21 n 21 ARG 21 A THR 22 n 22 THR 22 A GLY 23 n 23 GLY 23 A THR 24 n 24 THR 24 A GLY 25 n 25 GLY 25 A THR 26 n 26 THR 26 A LEU 27 n 27 LEU 27 A SER 28 n 28 SER 28 A ILE 29 n 29 ILE 29 A PHE 30 n 30 PHE 30 A GLY 31 n 31 GLY 31 A HIS 32 n 32 HIS 32 A GLN 33 n 33 GLN 33 A MET 34 n 34 MET 34 A ARG 35 n 35 ARG 35 A PHE 36 n 36 PHE 36 A ASN 37 n 37 ASN 37 A LEU 38 n 38 LEU 38 A GLN 39 n 39 GLN 39 A ASP 40 n 40 ASP 40 A GLY 41 n 41 GLY 41 A PHE 42 n 42 PHE 42 A PRO 43 n 43 PRO 43 A LEU 44 n 44 LEU 44 A VAL 45 n 45 VAL 45 A THR 46 n 46 THR 46 A THR 47 n 47 THR 47 A LYS 48 n 48 LYS 48 A ARG 49 n 49 ARG 49 A CBM 50 n 50 CME 50 A HIS 51 n 51 HIS 51 A LEU 52 n 52 LEU 52 A ARG 53 n 53 ARG 53 A SER 54 n 54 SER 54 A ILE 55 n 55 ILE 55 A ILE 56 n 56 ILE 56 A HIS 57 n 57 HIS 57 A GLU 58 n 58 GLU 58 A LEU 59 n 59 LEU 59 A LEU 60 n 60 LEU 60 A TRP 61 n 61 TRP 61 A PHE 62 n 62 PHE 62 A LEU 63 n 63 LEU 63 A GLN 64 n 64 GLN 64 A GLY 65 n 65 GLY 65 A ASP 66 n 66 ASP 66 A THR 67 n 67 THR 67 A ASN 68 n 68 ASN 68 A ILE 69 n 69 ILE 69 A ALA 70 n 70 ALA 70 A TYR 71 n 71 TYR 71 A LEU 72 n 72 LEU 72 A HIS 73 n 73 HIS 73 A GLU 74 n 74 GLU 74 A ASN 75 n 75 ASN 75 A ASN 76 n 76 ASN 76 A VAL 77 n 77 VAL 77 A THR 78 n 78 THR 78 A ILE 79 n 79 ILE 79 A TRP 80 n 80 TRP 80 A ASP 81 n 81 ASP 81 A GLU 82 n 82 GLU 82 A TRP 83 n 83 TRP 83 A ALA 84 n 84 ALA 84 A ASP 85 n 85 ASP 85 A GLU 86 n 86 GLU 86 A ASN 87 n 87 ASN 87 A GLY 88 n 88 GLY 88 A ASP 89 n 89 ASP 89 A LEU 90 n 90 LEU 90 A GLY 91 n 91 GLY 91 A PRO 92 n 92 PRO 92 A VAL 93 n 93 VAL 93 A TYR 94 n 94 TYR 94 A GLY 95 n 95 GLY 95 A LYS 96 n 96 LYS 96 A GLN 97 n 97 GLN 97 A TRP 98 n 98 TRP 98 A ARG 99 n 99 ARG 99 A ALA 100 n 100 ALA 100 A TRP 101 n 101 TRP 101 A PRO 102 n 102 PRO 102 A THR 103 n 103 THR 103 A PRO 104 n 104 PRO 104 A ASP 105 n 105 ASP 105 A GLY 106 n 106 GLY 106 A ARG 107 n 107 ARG 107 A HIS 108 n 108 HIS 108 A ILE 109 n 109 ILE 109 A ASP 110 n 110 ASP 110 A GLN 111 n 111 GLN 111 A ILE 112 n 112 ILE 112 A THR 113 n 113 THR 113 A THR 114 n 114 THR 114 A VAL 115 n 115 VAL 115 A LEU 116 n 116 LEU 116 A ASN 117 n 117 ASN 117 A GLN 118 n 118 GLN 118 A LEU 119 n 119 LEU 119 A LYS 120 n 120 LYS 120 A ASN 121 n 121 ASN 121 A ASP 122 n 122 ASP 122 A PRO 123 n 123 PRO 123 A ASP 124 n 124 ASP 124 A SER 125 n 125 SER 125 A ARG 126 n 126 ARG 126 A ARG 127 n 127 ARG 127 A ILE 128 n 128 ILE 128 A ILE 129 n 129 ILE 129 A VAL 130 n 130 VAL 130 A SER 131 n 131 SER 131 A ALA 132 n 132 ALA 132 A TRP 133 n 133 TRP 133 A ASN 134 n 134 ASN 134 A VAL 135 n 135 VAL 135 A GLY 136 n 136 GLY 136 A GLU 137 n 137 GLU 137 A LEU 138 n 138 LEU 138 A ASP 139 n 139 ASP 139 A LYS 140 n 140 LYS 140 A MET 141 n 141 MET 141 A ALA 142 n 142 ALA 142 A LEU 143 n 143 LEU 143 A ALA 144 n 144 ALA 144 A PRO 145 n 145 PRO 145 A CBM 146 n 146 CME 146 A HIS 147 n 147 HIS 147 A ALA 148 n 148 ALA 148 A PHE 149 n 149 PHE 149 A PHE 150 n 150 PHE 150 A GLN 151 n 151 GLN 151 A PHE 152 n 152 PHE 152 A TYR 153 n 153 TYR 153 A VAL 154 n 154 VAL 154 A ALA 155 n 155 ALA 155 A ASP 156 n 156 ASP 156 A GLY 157 n 157 GLY 157 A LYS 158 n 158 LYS 158 A LEU 159 n 159 LEU 159 A SER 160 n 160 SER 160 A CYS 161 n 161 CYS 161 A GLN 162 n 162 GLN 162 A LEU 163 n 163 LEU 163 A TYR 164 n 164 TYR 164 A GLN 165 n 165 GLN 165 A ARG 166 n 166 ARG 166 A CYS 167 n 167 CYS 167 A CBM 168 n 168 CME 168 A ASP 169 n 169 ASP 169 A VAL 170 n 170 VAL 170 A PHE 171 n 171 PHE 171 A LEU 172 n 172 LEU 172 A GLY 173 n 173 GLY 173 A LEU 174 n 174 LEU 174 A PRO 175 n 175 PRO 175 A PHE 176 n 176 PHE 176 A ASN 177 n 177 ASN 177 A ILE 178 n 178 ILE 178 A ALA 179 n 179 ALA 179 A SER 180 n 180 SER 180 A TYR 181 n 181 TYR 181 A ALA 182 n 182 ALA 182 A LEU 183 n 183 LEU 183 A LEU 184 n 184 LEU 184 A VAL 185 n 185 VAL 185 A HIS 186 n 186 HIS 186 A MET 187 n 187 MET 187 A MET 188 n 188 MET 188 A ALA 189 n 189 ALA 189 A GLN 190 n 190 GLN 190 A GLN 191 n 191 GLN 191 A CBM 192 n 192 CME 192 A ASP 193 n 193 ASP 193 A LEU 194 n 194 LEU 194 A GLU 195 n 195 GLU 195 A VAL 196 n 196 VAL 196 A GLY 197 n 197 GLY 197 A ASP 198 n 198 ASP 198 A PHE 199 n 199 PHE 199 A VAL 200 n 200 VAL 200 A TRP 201 n 201 TRP 201 A THR 202 n 202 THR 202 A GLY 203 n 203 GLY 203 A GLY 204 n 204 GLY 204 A ASP 205 n 205 ASP 205 A THR 206 n 206 THR 206 A HIS 207 n 207 HIS 207 A LEU 208 n 208 LEU 208 A TYR 209 n 209 TYR 209 A SER 210 n 210 SER 210 A ASN 211 n 211 ASN 211 A HIS 212 n 212 HIS 212 A MET 213 n 213 MET 213 A ASP 214 n 214 ASP 214 A GLN 215 n 215 GLN 215 A THR 216 n 216 THR 216 A HIS 217 n 217 HIS 217 A LEU 218 n 218 LEU 218 A GLN 219 n 219 GLN 219 A LEU 220 n 220 LEU 220 A SER 221 n 221 SER 221 A ARG 222 n 222 ARG 222 A GLU 223 n 223 GLU 223 A PRO 224 n 224 PRO 224 A ARG 225 n 225 ARG 225 A PRO 226 n 226 PRO 226 A LEU 227 n 227 LEU 227 A PRO 228 n 228 PRO 228 A LYS 229 n 229 LYS 229 A LEU 230 n 230 LEU 230 A ILE 231 n 231 ILE 231 A ILE 232 n 232 ILE 232 A LYS 233 n 233 LYS 233 A ARG 234 n 234 ARG 234 A LYS 235 n 235 LYS 235 A PRO 236 n 236 PRO 236 A ALA 237 n 237 GLU 237 A SER 238 n 238 SER 238 A ILE 239 n 239 ILE 239 A PHE 240 n 240 PHE 240 A ASP 241 n 241 ASP 241 A TYR 242 n 242 TYR 242 A ARG 243 n 243 ARG 243 A PHE 244 n 244 PHE 244 A GLU 245 n 245 GLU 245 A ASP 246 n 246 ASP 246 A PHE 247 n 247 PHE 247 A GLU 248 n 248 GLU 248 A ILE 249 n 249 ILE 249 A GLU 250 n 250 GLU 250 A GLY 251 n 251 GLY 251 A TYR 252 n 252 TYR 252 A ASP 253 n 253 ASP 253 A PRO 254 n 254 PRO 254 A HIS 255 n 255 HIS 255 A PRO 256 n 256 PRO 256 A GLY 257 n 257 GLY 257 A ILE 258 n 258 ILE 258 A LYS 259 n 259 LYS 259 A ALA 260 n 260 ALA 260 A PRO 261 n 261 PRO 261 A VAL 262 n 262 VAL 262 A ALA 263 n 263 ALA 263 A ILE 264 n 264 ILE 264 A author_and_software_defined_assembly PISA,PQS 2 dimeric 4270 -13 22640 A CXM 1 N-CARBOXYMETHIONINE A CXM 1 MET A CME 50 S,S-(2-HYDROXYETHYL)THIOCYSTEINE A CME 50 CYS A CME 146 S,S-(2-HYDROXYETHYL)THIOCYSTEINE A CME 146 CYS A CME 168 S,S-(2-HYDROXYETHYL)THIOCYSTEINE A CME 168 CYS A CME 192 S,S-(2-HYDROXYETHYL)THIOCYSTEINE A CME 192 CYS 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 16_556 x,-y,-z+3/2 crystal symmetry operation 0.0000000000 0.0000000000 204.4110000000 A O LYS 18 A O LYS 18 A N THR 26 A N THR 26 A N PHE 36 A N PHE 36 A O PHE 199 A O PHE 199 A N GLY 197 A N GLY 197 A O LEU 159 A O LEU 159 A N TYR 164 A N TYR 164 A O PHE 149 A O PHE 149 A O PHE 150 A O PHE 150 A N VAL 130 A N VAL 130 A O TRP 101 A O TRP 101 A N ILE 109 A N ILE 109 A O ILE 231 A O ILE 231 A N GLU 248 A N GLU 248 1 A NZ LYS 2 A NZ LYS 2 1 Y 1 A CG GLU 237 A CG GLU 237 1 Y 1 A CD GLU 237 A CD GLU 237 1 Y 1 A OE1 GLU 237 A OE1 GLU 237 1 Y 1 A OE2 GLU 237 A OE2 GLU 237 1 Y 1 A A O N ASP THR 20 22 2.07 1 A LYS 18 170.02 -166.38 1 A ASP 20 -114.13 -152.37 1 A ARG 21 -48.87 34.00 1 A THR 22 69.55 78.24 1 A PRO 43 -77.85 47.66 1 A VAL 93 -75.35 -153.23 1 A TYR 94 -40.90 -78.23 1 A ALA 100 -162.08 55.49 1 A ASP 122 -152.45 59.06 1 A ARG 127 -149.78 41.63 1 A ASN 211 -86.95 31.76 1 A PRO 228 -77.34 -163.61 1 A GLU 245 -64.33 3.55 PROTEIN_REP.PARAM PROTEIN.TOP WATER_REP.PARAM WATER.TOP 25.1 0.00 0.00 0.00 0.00 0.00 0.00 0.2640000 0.008 0.2230000 0.2230000 2.60 6.00 979 11099 9684 10.1 81.4 RANDOM 2336470.49 0.00 1 RESTRAINED THROUGHOUT 3.0 1.0 FLAT MODEL 137.4 1.113 0.42 0.33 5.00 0.45 0.36 2.60 6.00 11 2175 0 0 2164 0.010 1.6 24.5 0.92 0.2940000 0.034 0.2570000 2.75 76 623 6 10.9 35.3 11.0 2.6 6.0 1EV8 11991 11099 3.0 1.0 0.1250000 1 17.05 12.27 92.6 0.5500000 2.6 2.69 410 1 31.7 phasing AMoRE refinement CNS 0.5 data scaling SCALEPACK CRYSTAL STRUCTURE ANALYSIS OF CYS167 MUTANT OF ESCHERICHIA COLI 1 N N 2 N N A LYS 2 A LYS 2 HELX_P A GLY 15 A GLY 15 1 1 14 A GLN 39 A GLN 39 HELX_P A GLY 41 A GLY 41 5 2 3 A LEU 52 A LEU 52 HELX_P A GLN 64 A GLN 64 1 3 13 A ILE 69 A ILE 69 HELX_P A ASN 75 A ASN 75 1 4 7 A TRP 80 A TRP 80 HELX_P A ALA 84 A ALA 84 5 5 5 A VAL 93 A VAL 93 HELX_P A ALA 100 A ALA 100 1 6 8 A ASP 110 A ASP 110 HELX_P A ASP 122 A ASP 122 1 7 13 A ASN 134 A ASN 134 HELX_P A MET 141 A MET 141 5 8 8 A GLY 173 A GLY 173 HELX_P A GLN 191 A GLN 191 1 9 19 A HIS 212 A HIS 212 HELX_P A LEU 220 A LEU 220 1 10 9 A ARG 243 A ARG 243 HELX_P A GLU 245 A GLU 245 5 11 3 covale 1.349 both A CXM 1 A C CXM 1 1_555 A LYS 2 A N LYS 2 1_555 covale 1.329 both A ARG 49 A C ARG 49 1_555 A CME 50 A N CME 50 1_555 covale 1.329 both A CME 50 A C CME 50 1_555 A HIS 51 A N HIS 51 1_555 covale 1.323 both A PRO 145 A C PRO 145 1_555 A CME 146 A N CME 146 1_555 covale 1.329 both A CME 146 A C CME 146 1_555 A HIS 147 A N HIS 147 1_555 covale 1.338 both A CYS 167 A C CYS 167 1_555 A CME 168 A N CME 168 1_555 covale 1.323 both A CME 168 A C CME 168 1_555 A ASP 169 A N ASP 169 1_555 covale 1.330 both A GLN 191 A C GLN 191 1_555 A CME 192 A N CME 192 1_555 covale 1.332 both A CME 192 A C CME 192 1_555 A ASP 193 A N ASP 193 1_555 TRANSFERASE Cys167 E. coli Thymidylate Synthase, TRANSFERASE TYSY_ECOLI UNP 1 1 P0A884 MKQYLELMQKVLDEGTQKNDRTGTGTLSIFGHQMRFNLQDGFPLVTTKRCHLRSIIHELLWFLQGDTNIAYLHENNVTIW DEWADENGDLGPVYGKQWRAWPTPDGRHIDQITTVLNQLKNDPDSRRIIVSAWNVGELDKMALAPCHAFFQFYVADGKLS CQLYQRSCDVFLGLPFNIASYALLVHMMAQQCDLEVGDFVWTGGDTHLYSNHMDQTHLQLSREPRPLPKLIIKRKPESIF DYRFEDFEIEGYDPHPGIKAPVAI 1 264 1EV8 1 264 P0A884 A 1 1 264 1 MET modified residue CXM 1 1EV8 A P0A884 UNP 1 1 1 CYS modified residue CME 50 1EV8 A P0A884 UNP 50 50 1 CYS modified residue CME 146 1EV8 A P0A884 UNP 146 146 1 SER engineered mutation CYS 167 1EV8 A P0A884 UNP 167 167 1 CYS modified residue CME 168 1EV8 A P0A884 UNP 168 168 1 CYS modified residue CME 192 1EV8 A P0A884 UNP 192 192 6 2 2 anti-parallel anti-parallel parallel anti-parallel anti-parallel anti-parallel anti-parallel A THR 16 A THR 16 A ASN 19 A ASN 19 A GLY 25 A GLY 25 A ASN 37 A ASN 37 A GLU 195 A GLU 195 A TYR 209 A TYR 209 A LYS 158 A LYS 158 A GLN 165 A GLN 165 A PHE 149 A PHE 149 A ALA 155 A ALA 155 A ILE 129 A ILE 129 A SER 131 A SER 131 A TRP 101 A TRP 101 A PRO 102 A PRO 102 A HIS 108 A HIS 108 A ILE 109 A ILE 109 A LYS 229 A LYS 229 A ILE 232 A ILE 232 A PHE 247 A PHE 247 A GLU 250 A GLU 250 199 I 21 3