Annotation CANA NtC Numbers of Steps in 1 2 3 4 5 6 7 8 9
DNA RNA GS, #    
# % # % δ ε ζ α1 β1 γ1 δ1 χ χ1 μ NN C'C'
the most frequent, "canonical" A form AAA AA00 1 820 3.2 21 142 37.1 293 82 206 288 293 173 55 82 199 201 18 4.8 5.4
A-DNA with B like χ/χ1 AAA AA02 564 1.0 78 0.1 170 88 202 274 293 161 54 88 245 246 18 4.7 5.2
A like, similar to AA00, high α1 AAA AA03 30 0.1 810 1.4 66 80 224 263 337 155 27 80 192 202 16 4.9 5.6
A like, similar to AA00, low α1 AAA AA04 145 0.3 1 797 3.2 66 80 202 299 259 175 86 80 200 193 19 4.7 5.4
A form variant AAA AA08 153 0.3 8 578 15.0 447 82 234 275 306 152 56 80 189 197 23 4.6 5.4
A form variant AAA AA09 54 0.1 256 0.4 36 89 231 273 300 155 52 85 214 232 25 4.7 5.4
A like, α1/ɣ1 crank (150/180) AA1 AA01 296 0.5 1 947 3.4 167 82 197 291 149 192 182 85 204 188 14 4.7 5.3
A like, α1/ɣ1 crank (130/180) AA1 AA05 1 0.0 283 0.5 32 83 221 285 134 237 187 84 210 184 65 4.5 4.8
A like, α1/ɣ1 crank (130/180) AA1 AA06 21 0.0 516 0.9 34 80 214 256 135 229 181 82 196 180 16 4.6 5.2
A like, α1/ɣ1 crank (210/140) AA1 AA10 14 0.0 493 0.9 161 79 203 313 210 154 143 80 199 183 13 4.8 5.4
A like, α1/ɣ1 crank (90/190) AA1 AA11 5 0.0 237 0.4 35 81 261 225 91 257 192 83 190 180 10 4.6 5.1
A form with distant bases, low ζ AA2 AA07 0 0.0 87 0.2 39 82 241 218 296 140 55 80 201 198 345 6.7 6.7
A like backbone, bases can be intercalated AA2 AA12 10 0.0 660 1.2 90 82 198 261 299 176 49 81 201 198 355 6.2 6.4
A form with distant bases, low ζ AA2 AA13 0 0.0 113 0.2 37 83 190 241 307 174 51 82 197 190 343 7.3 6.9
A-B: δ C3'-endo, δ1 C2'-endo, χ/χ1 have A-B pattern A-B AB01 1 412 2.4 44 0.1 67 86 186 281 301 179 54 142 223 256 18 4.7 5.3
A-B: δ ~O4'-endo, extremely low ε, χ/χ1 are B like A-B AB02 132 0.2 1 0.0 28 93 59 56 208 189 65 131 237 251 23 4.4 4.9
A-B: similar to AB01 with high α1 and low ζ, β1, ɣ1 A-B AB03 762 1.3 0 0.0 46 104 194 254 322 163 37 138 228 257 24 4.6 5.1
A-B: δ C3'-endo, δ1 C2'-endo, χ/χ1 have A/B pattern, C'C' high A-B AB04 257 0.4 190 0.3 32 86 214 296 280 210 56 139 194 234 7 5.6 6.6
A-B: δ C3'-endo, δ1 C2'-endo, χ/χ1 have A/B pattern A-B AB05 549 1.0 1 028 1.8 50 83 214 287 303 176 58 145 196 239 17 4.8 5.7
BI-A complex conformer with δ1 from C3' to C4'-exo, χ/χ1 are B like B-A BA01 727 1.3 4 0.0 36 136 189 255 300 161 53 88 254 225 29 4.2 4.7
BI-A complex conformer with δ1 from C3' to C4'-exo, χ/χ1 are B like B-A BA05 1 990 3.5 0 0.0 71 131 184 269 296 169 52 104 251 235 24 4.1 4.6
BI-A: extremely low β1~60, α1/ɣ1 crank (260/170), χ1 A like B-A BA09 144 0.2 6 0.0 26 135 200 287 256 69 172 90 264 186 23 3.8 4.0
B-A: low β1 B-A BA08 719 1.2 28 0.0 55 139 209 213 300 142 49 89 262 215 33 4.5 4.9
B-A complex cluster: α1~90, ɣ1~180, χ1 A like B-A BA10 164 0.3 18 0.0 50 135 199 236 98 219 204 90 254 200 28 4.0 4.4
B-A complex cluster: α1~90, ɣ1~180, χ1 A like B-A BA13 173 0.3 41 0.1 44 141 222 199 81 230 196 88 265 198 31 4.2 4.6
BII-A: χ1 A like B-A BA16 37 0.1 39 0.1 220 150 251 183 61 230 199 83 262 196 31 4.5 4.8
BII-A: δ1~O4'-endo, β1~130 B-A BA17 139 0.2 4 0.0 32 149 253 176 295 131 45 98 269 232 40 4.6 4.9
the most frequent DNA conformer, "canonical" B form, also called BI BBB BB00 19 361 33.6 8 0.0 1 925 138 183 258 303 180 44 138 253 258 26 4.4 5.0
less populated variant of BI form BBB BB01 3 600 6.2 0 0.0 136 130 181 266 301 176 49 120 247 244 26 4.3 4.9
less populated variant of BI form, very low ε, α1, β1 BB1 BB17 201 0.3 1 0.0 25 130 147 275 229 241 80 136 243 269 24 4.6 5.2
BI with α1/ɣ1 crank (30/300) BB1 BB02 2 389 4.1 0 0.0 111 141 194 246 31 195 297 150 252 253 22 4.5 5.1
BI with α1/ɣ1 crank (160/170) BB1 BB03 344 0.6 0 0.0 28 144 176 275 163 164 174 147 240 233 26 4.5 5.2
B form with α1/ɣ1 crank (120/190) and low both ε and ζ BB1 BB11 244 0.4 1 0.0 24 145 200 199 123 227 187 144 256 222 29 4.7 5.2
B like, first χ A like BB1 BB16 657 1.1 2 0.0 67 138 224 283 285 170 48 140 203 271 33 5.0 5.5
BI-BII conformer B12 BB04 3 576 6.2 3 0.0 236 140 201 214 315 153 46 140 263 253 29 4.7 5.1
BI-BII with α1/ɣ1 crank (70/220), χ1 A like B12 BB05 112 0.2 0 0.0 19 143 218 199 74 232 216 129 269 211 29 4.2 4.7
BII form, typical by ε/ζ switch compared to BI BB2 BB07 2 774 4.8 18 0.0 325 144 247 169 297 141 46 141 271 260 46 5.0 5.2
BII form variant with α1/ɣ1 crank (70/210) BB2 BB08 147 0.3 7 0.0 28 146 248 184 67 225 208 147 268 235 30 4.7 5.1
B form with extremely low values of α1, β1, ɣ1, and low ε and ζ miB BB10 933 1.6 0 0.0 52 138 196 192 22 106 19 130 257 258 26 4.4 4.9
BI like with α1/ɣ1 crank (260/170), low β1 70, χ1 A like miB BB12 460 0.8 0 0.0 92 140 196 280 257 76 171 140 268 205 24 3.9 4.2
BI like with α1/ɣ1 crank (220/160), low β1 70, χ1 A like miB BB13 247 0.4 0 0.0 31 143 187 293 219 99 161 146 253 218 25 4.4 4.9
B like with extremely low ε, high β miB BB14 166 0.3 0 0.0 38 111 105 304 219 256 83 131 260 265 28 4.3 4.9
BI with high α1 (340) and ɣ1 near 0 miB BB15 547 0.9 3 0.0 45 144 188 256 345 189 350 150 252 264 23 4.4 5.0
B like pucker, χ1 A like, unusual combination of ε, ζ, α1, ɣ1, χ1 miB BB20 23 0.0 0 0.0 12 143 294 110 150 199 54 152 261 185 277 5.5 5.2
A-B backbone, parallel distant bases can be intercalated ICL IC01 16 0.0 231 0.4 50 83 220 290 297 223 54 145 203 283 11 7.3 7.5
A-B backbone, parallel distant bases can be intercalated ICL IC02 3 0.0 66 0.1 72 82 222 282 297 227 53 145 204 234 5 7.7 7.9
A-B backbone, parallel distant bases can be intercalated, α1/ɣ1 crank (70/300), χ1 B like ICL IC03 2 0.0 40 0.1 74 81 231 251 71 178 300 146 201 265 349 7.6 7.7
A-B backbone, parallel distant bases can be intercalated, α1/ɣ1 crank (190/180), χ1 B like ICL IC04 11 0.0 38 0.1 33 85 208 287 193 182 184 148 211 244 25 7.0 7.2
BII backbone, parallel distant bases can be intercalated ICL IC05 29 0.1 7 0.0 24 141 256 172 290 178 49 147 275 275 45 7.3 7.1
B like, parallel distant bases can be intercalated, first χ A like ICL IC06 70 0.1 17 0.0 43 140 238 281 288 173 47 142 205 269 38 6.2 6.2
A pucker and χ torsions, unusual combination of backbone torsions, bases very distant, parallel, low rise OPN OP01 0 0.0 92 0.2 41 83 224 122 276 146 46 82 202 193 196 8.3 7.4
A pucker and χ torsions, unusual combination of backbone torsions, bases distant, angled OPN OP02 0 0.0 39 0.1 12 83 226 156 292 159 43 86 207 176 259 9.0 8.3
A pucker and χ torsions, unusual combination of backbone torsions, bases angled, can be intercalated OPN OP03 0 0.0 224 0.4 63 78 226 301 175 138 51 84 199 194 202 7.5 7.4
A pucker and χ torsions, unusual combination of backbone torsions, bases angled, can be intercalated OPN OP04 0 0.0 299 0.5 63 80 221 285 166 171 52 85 206 194 206 7.2 7.1
A pucker and χ torsions, unusual combination of backbone torsions, bases distant, perpendicular OPN OP05 0 0.0 39 0.1 14 78 204 51 69 127 45 84 201 187 264 9.1 8.9
A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, low rise OPN OP06 0 0.0 36 0.1 35 81 214 152 296 169 48 78 204 207 246 10.1 8.9
A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, low rise OPN OP07 0 0.0 66 0.1 85 81 240 202 288 152 48 79 202 189 321 7.7 7.5
A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases parallel, low rise OPN OP08 0 0.0 106 0.2 33 80 203 278 252 83 167 84 201 177 318 7.2 5.9
A-B pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, angled OPN OP09 0 0.0 64 0.1 20 82 199 271 199 149 52 147 205 249 168 7.8 6.7
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, parallel OPN OP10 3 0.0 84 0.1 24 147 218 152 289 175 40 87 248 186 36 7.8 7.3
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, perpendicular OPN OP11 13 0.0 299 0.5 53 146 263 299 298 190 57 84 235 198 111 8.9 7.8
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, angled OPN OP12 10 0.0 245 0.4 43 141 258 286 274 185 43 83 237 191 73 7.6 7.3
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, perpendicular OPN OP13 0 0.0 51 0.1 30 146 268 248 62 153 47 86 239 186 189 10.5 8.9
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, angled OPN OP14 0 0.0 57 0.1 27 148 270 227 58 196 61 88 259 176 229 9.6 8.2
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases can pair with each other OPN OP15 11 0.0 168 0.3 52 150 199 151 292 147 41 83 264 187 21 6.8 6.5
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, perpendicular OPN OP16 0 0.0 31 0.1 31 149 271 152 307 176 50 80 229 197 103 8.7 7.3
B-A pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, angled OPN OP17 0 0.0 24 0.0 12 145 267 294 291 138 177 84 234 195 191 10.1 7.9
B pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, angled OPN OP18 1 0.0 40 0.1 24 149 289 107 67 200 57 148 222 240 232 8.5 6.5
B pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant, loop in quadruplex OPN OP19 18 0.0 2 0.0 15 145 225 64 74 186 188 126 250 255 20 8.0 7.3
B pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant in 4-way junction OPN OP20 48 0.1 89 0.2 28 141 271 283 299 192 55 147 259 217 67 8.7 7.9
B pucker and χ torsions, unusual combination of ε, ζ, α1, β1, bases distant in 5'-end dsDNA OPN OP21 26 0.0 71 0.1 19 146 241 80 70 178 61 147 227 237 257 10.2 8.3
B-A pucker, unusual combination of ε, ζ, α1, β1, bases perpendicular, first syn OPN OPS1 4 0.0 76 0.1 25 146 263 289 283 185 53 82 63 192 93 8.2 7.5
B pucker, unusual combination of ε, ζ, α1, β1, bases angled, second syn OPN OP1S 26 0.0 0 0.0 12 144 207 60 82 203 191 147 242 68 65 7.6 7.0
A like with first base in syn orientation SYN AAS1 2 0.0 127 0.2 54 79 221 302 291 171 59 81 15 196 45 4.3 5.3
A-B, χ1 syn SYN AB1S 15 0.0 0 0.0 15 90 214 280 295 176 56 139 239 68 1 5.4 6.1
A-B, χ1 syn SYN AB2S 4 0.0 67 0.1 37 84 221 286 307 170 53 140 203 69 11 4.8 5.7
BI like, unusual β1 and ɣ1, χ1 syn SYN BB1S 29 0.1 0 0.0 24 139 199 281 306 258 308 151 237 66 357 6.5 6.6
BI like, α1 50, ɣ1 290, χ1 syn SYN BB2S 53 0.1 1 0.0 20 134 194 223 46 180 290 146 251 66 358 6.0 6.2
BI like, χ syn SYN BBS1 307 0.5 0 0.0 39 147 187 275 296 172 52 135 64 260 45 3.9 4.5
Z like conformer (ZZS2), both bases anti ZZZ ZZ01 4 0.0 303 0.5 238 81 210 49 166 150 49 147 208 226 306 4.6 6.0
Z form, Y-R step ZZZ ZZ1S 139 0.2 16 0.0 24 147 263 76 66 186 178 96 207 61 359 6.4 6.3
Z form, Y-R step, d1 C2'-endo ZZZ ZZ2S 67 0.1 6 0.0 43 141 263 71 78 180 185 147 208 77 356 6.4 6.2
ZI form, R-Y step ZZZ ZZS1 100 0.2 0 0.0 41 97 243 293 210 230 55 144 63 206 332 5.7 6.8
ZII form, R-Y step ZZZ ZZS2 22 0.0 0 0.0 15 95 187 64 169 162 44 143 56 213 329 5.7 6.7
Unassigned conformations NAN NANT 10 502 18.2 15 447 27.1 0
Annotation CANA NtC 57 634 100.0 57 011 100.0 7 231 δ ε ζ α1 β1 γ1 δ1 χ χ1 μ NN C'C'
# % # % GS, #    
DNA RNA 1 2 3 4 5 6 7 8 9