4TWK - Sequence, Chains, Asymmetric and Biological Units

• Title: CRYSTAL STRUCTURE OF HUMAN TWO PORE DOMAIN POTASSIUM ION CHA (K2P2.1)
• Keywords: ION CHANNEL, MEMBRANE PROTEIN, K2P, TRANSPORT PROTEIN
• Experiment: X-ray diffraction
• Number of Models: 1

Database	ID code	Status	Coordinate files
			Header	Asymmetric unit	Biological unit
PDB	4TWK	released	available	available	Quaternary Structure Server

Asymmetric unit from PDB

Unit	Type	Name	Chain ID	Residues	Atoms	Hetatoms
1	Protein	POTASSIUM CHANNEL SUBFAMILY K MEMBER 2	A	255	1908	0
2	Protein	POTASSIUM CHANNEL SUBFAMILY K MEMBER 2	B	241	1838	0
3	Ligand	POTASSIUM CHANNEL SUBFAMILY K MEMBER 2	A	7	0	114
4	Ligand	POTASSIUM CHANNEL SUBFAMILY K MEMBER 2	B	3	0	54
5	Water			27	0	27
total				533	3746	195

Proteins

Unit 1

THR 38 ILE 39 ASN 40 VAL 41 MET 42 LYS 43 TRP 44 LYS 45 THR 46 VAL 47 SER 48 THR 49 ILE 50 PHE 51 LEU 52 VAL 53 VAL 54 VAL 55 LEU 56 TYR 57 LEU 58 ILE 59 ILE 60 GLY 61 ALA 62 THR 63 VAL 64 PHE 65 LYS 66 ALA 67 LEU 68 GLU 69 GLN 70 PRO 71 HIS 72 GLU 73 ILE 74 SER 75 GLN 76 ARG 77 THR 78 THR 79 ILE 80 VAL 81 ILE 82 GLN 83 LYS 84 GLN 85 THR 86 PHE 87 ILE 88 SER 89 GLN 90 HIS 91 SER 92 CYS 93 VAL 94 ASN 95 SER 96 THR 97 GLU 98 LEU 99 ASP 100 GLU 101 LEU 102 ILE 103 GLN 104 GLN 105 ILE 106 VAL 107 ALA 108 ALA 109 ILE 110 ASN 111 ALA 112 GLY 113 ILE 114 ILE 115 PRO 116 LEU 117 GLY 118 ASN 119 THR 120 SER 121 ASN 122 GLN 123 ILE 124 SER 125 HIS 126 TRP 127 ASP 128 LEU 129 GLY 130 SER 131 SER 132 PHE 133 PHE 134 PHE 135 ALA 136 GLY 137 THR 138 VAL 139 ILE 140 THR 141 THR 142 ILE 143 GLY 144 PHE 145 GLY 146 ASN 147 ILE 148 SER 149 PRO 150 ARG 151 THR 152 GLU 153 GLY 154 GLY 155 LYS 156 ILE 157 PHE 158 CYS 159 ILE 160 ILE 161 TYR 162 ALA 163 LEU 164 LEU 165 GLY 166 ILE 167 PRO 168 LEU 169 PHE 170 GLY 171 PHE 172 LEU 173 LEU 174 ALA 175 GLY 176 VAL 177 GLY 178 ASP 179 GLN 180 LEU 181 GLY 182 THR 183 ILE 184 PHE 185 GLY 186 LYS 187 GLY 188 ILE 189 ALA 190 LYS 191 VAL 192 GLU 193 ASP 194 THR 195 PHE 196 ILE 197 LYS 198 TRP 199 ASN 200 VAL 201 SER 202 GLN 203 THR 204 LYS 205 ILE 206 ARG 207 ILE 208 ILE 209 SER 210 THR 211 ILE 212 ILE 213 PHE 214 ILE 215 LEU 216 PHE 217 GLY 218 CYS 219 VAL 220 LEU 221 PHE 222 VAL 223 ALA 224 LEU 225 PRO 226 GLY 235 TRP 236 SER 237 ALA 238 LEU 239 ASP 240 ALA 241 ILE 242 TYR 243 PHE 244 VAL 245 VAL 246 ILE 247 THR 248 LEU 249 THR 250 THR 251 ILE 252 GLY 253 PHE 254 GLY 255 ASP 256 TYR 257 VAL 258 ALA 259 GLY 260 GLY 261 SER 262 ASP 263 ILE 264 LYS 271 PRO 272 VAL 273 VAL 274 TRP 275 PHE 276 TRP 277 ILE 278 LEU 279 VAL 280 GLY 281 LEU 282 ALA 283 TYR 284 PHE 285 ALA 286 ALA 287 VAL 288 LEU 289 SER 290 MET 291 ILE 292 GLY 293 ASP 294 TRP 295 LEU 296 ARG 297 VAL 298 ILE 299 SER 300 ALA 301 GLU 302 ASN 303 LEU 304 TYR 305 PHE 306

Unit 2

MET 42 LYS 43 TRP 44 LYS 45 THR 46 VAL 47 SER 48 THR 49 ILE 50 PHE 51 LEU 52 VAL 53 VAL 54 VAL 55 LEU 56 TYR 57 LEU 58 ILE 59 ILE 60 GLY 61 ALA 62 THR 63 VAL 64 PHE 65 LYS 66 ALA 67 LEU 68 GLU 69 GLN 70 PRO 71 HIS 72 GLU 73 ILE 74 SER 75 GLN 76 ARG 77 THR 78 THR 79 ILE 80 VAL 81 ILE 82 GLN 83 LYS 84 GLN 85 THR 86 PHE 87 ILE 88 SER 89 GLN 90 HIS 91 SER 92 CYS 93 VAL 94 ASN 95 SER 96 THR 97 GLU 98 LEU 99 ASP 100 GLU 101 LEU 102 ILE 103 GLN 104 GLN 105 ILE 106 VAL 107 ALA 108 ALA 109 ILE 110 ASN 111 ALA 112 GLY 113 ILE 114 ILE 115 PRO 116 ILE 124 SER 125 HIS 126 TRP 127 ASP 128 LEU 129 GLY 130 SER 131 SER 132 PHE 133 PHE 134 PHE 135 ALA 136 GLY 137 THR 138 VAL 139 ILE 140 THR 141 THR 142 ILE 143 GLY 144 PHE 145 GLY 146 ASN 147 ILE 148 SER 149 PRO 150 ARG 151 THR 152 GLU 153 GLY 154 GLY 155 LYS 156 ILE 157 PHE 158 CYS 159 ILE 160 ILE 161 TYR 162 ALA 163 LEU 164 LEU 165 GLY 166 ILE 167 PRO 168 LEU 169 PHE 170 GLY 171 PHE 172 LEU 173 LEU 174 ALA 175 GLY 176 VAL 177 GLY 178 ASP 179 GLN 180 LEU 181 GLY 182 THR 183 ILE 184 PHE 185 GLY 186 LYS 187 GLY 188 ILE 189 ALA 190 LYS 191 VAL 192 GLU 193 ASP 194 THR 195 PHE 196 ILE 197 LYS 198 TRP 199 ASN 200 VAL 201 SER 202 GLN 203 THR 204 LYS 205 ILE 206 ARG 207 ILE 208 ILE 209 SER 210 THR 211 ILE 212 ILE 213 PHE 214 ILE 215 LEU 216 PHE 217 GLY 218 CYS 219 VAL 220 LEU 221 PHE 222 VAL 223 ALA 224 LEU 225 PRO 226 ALA 227 ILE 228 ILE 229 PHE 230 LYS 231 HIS 232 ILE 233 GLU 234 GLY 235 TRP 236 SER 237 ALA 238 LEU 239 ASP 240 ALA 241 ILE 242 TYR 243 PHE 244 VAL 245 VAL 246 ILE 247 THR 248 LEU 249 THR 250 THR 251 ILE 252 GLY 253 PHE 254 GLY 255 ASP 256 TYR 257 LYS 271 PRO 272 VAL 273 VAL 274 TRP 275 PHE 276 TRP 277 ILE 278 LEU 279 VAL 280 GLY 281 LEU 282 ALA 283 TYR 284 PHE 285 ALA 286 ALA 287 VAL 288 LEU 289 SER 290 MET 291 ILE 292 GLY 293 ASP 294 TRP 295 LEU 296 ARG 297 VAL 298 ILE 299 SER 300 ALA 301 GLU 302

Ligands

Unit 3	K 401 K 402 37X 403 37X 404 37X 405 37X 406 MG 407
Unit 4	NAG 401 37X 402 K 403