Data Item _ndb_struct_ntc_step_summary.assigned_NtC
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General 
- Item name
- _ndb_struct_ntc_step_summary.assigned_NtC
- Category name
- ndb_struct_ntc_step_summary
- Attribute name
- assigned_NtC
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The assigned NtC for the nucleotide step.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| AA00 | the most frequent, canonical A form |
| AA01 | A like, α2/ɣ2 switch (150/180) |
| AA02 | A-DNA with the B like χ1/χ2 |
| AA03 | A like, similar to AA00, high α2 |
| AA04 | A like, similar to AA00, low α2 |
| AA05 | A like, α2/ɣ2 switch (130/180) |
| AA06 | A like, α2/ɣ2 switch (130/180) |
| AA07 | A form with distant bases, low ζ1 |
| AA08 | A form variant |
| AA09 | A form variant |
| AA10 | A like, α2/ɣ2 switch (210/140) |
| AA11 | A like, α2/ɣ2 switch (90/190) |
| AA12 | A like backbone, bases can be intercalated |
| AA13 | A form with distant bases, low ζ1 |
| AAS1 | A like with first base in syn orientation |
| AB01 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A-B pattern |
| AB02 | A-B: δ1 O4'-endo, extremely low ε1, χ1/χ2 are B like |
| AB03 | A-B: similar to AB01 with high α2 and low ζ1, β2, ɣ2 |
| AB04 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A/B pattern, C'C' high |
| AB05 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A/B pattern |
| AB1S | A-B, χ2 syn |
| AB2S | A-B, χ2 syn |
| BA01 | BI-A complex conformer with δ2 from C3' to C4'-exo, χ1/χ2 are B like |
| BA05 | BI-A complex conformer with δ2 from C3' to C4'-exo, χ1/χ2 are B like |
| BA08 | B-A: low β2 |
| BA09 | BI-A: extremely low β2~60, α2/ɣ2 switch (260/170), χ2 A like |
| BA10 | B-A complex cluster: α2~90, ɣ2~180, χ2 A like |
| BA13 | B-A complex cluster: α2~90, ɣ2~180, χ2 A like |
| BA16 | BII-A: χ2 A like |
| BA17 | BII-A: δ2~O4'-endo, β2~130 |
| BB00 | the most frequent DNA conformer, canonical B form, also called BI |
| BB01 | less populated variant of BI form |
| BB02 | BI with α2/ɣ2 typical values switched to 30/300 |
| BB03 | BI with α2/ɣ2 typical values switched to 160/170 |
| BB04 | conformer with torsion transforming BI to BII form |
| BB05 | BI-BII with α2/ɣ2 typical values switched to 70/220, χ2 A like |
| BB07 | BII form, typical by ε1/ζ1 switch compared to BI |
| BB08 | BII form variant with α1/ɣ1 typical values switched to 70/210 |
| BB10 | B form with extremely low values of α2, β2, ɣ2, and low ε1 and ζ1 |
| BB11 | B form with α2/ɣ2 typical values switched to 120/190 and low both ε1 and ζ1 |
| BB12 | BI like with α2/ɣ2 typical values switched to 260/170, low β2 70, χ2 A like |
| BB13 | BI like with α2/ɣ2 typical values switched to 220/160, low β2 70, χ2 A like |
| BB14 | B like with extremely low ε1, high β2 |
| BB15 | BI with high α2 (340) and ɣ2 near 0 |
| BB16 | B like, with χ1 A like |
| BB17 | less populated variant of BI form, very low ε1, α2, β2 |
| BB1S | BI like, unusual β2 and ɣ2, χ2 syn |
| BB20 | B like pucker, χ2 A like, unusual combination of ε1, ζ1, α2, ɣ2, χ2 |
| BB2S | BI like, α2 50, ɣ2 290, χ2 syn |
| BBS1 | BI like, χ1 syn |
| IC01 | A-B backbone, parallel distant bases can be intercalated |
| IC02 | A-B backbone, parallel distant bases can be intercalated |
| IC03 | A-B backbone, parallel distant bases can be intercalated, α2/ɣ2 typical values switched to 70/300, χ2 B like |
| IC04 | A-B backbone, parallel distant bases can be intercalated, α2/ɣ2 typical values switched to 190/180, χ2 B like |
| IC05 | BII backbone, parallel distant bases can be intercalated |
| IC06 | B like, parallel distant bases can be intercalated, χ1 A like |
| IC07 | A like intercalated |
| NANT | Unassigned conformations |
| OP01 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, parallel, low rise |
| OP02 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, angled |
| OP03 | A pucker and χ torsions, unusual combination of backbone torsions, base sangled, can be intercalated |
| OP04 | A pucker and χ torsions, unusual combination of backbone torsions, base sangled, can be intercalated |
| OP05 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, perpendicular |
| OP06 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, low rise |
| OP07 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, low rise |
| OP08 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases parallel, low rise |
| OP09 | A-B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP10 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, parallel |
| OP11 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP12 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP13 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP14 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP15 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases can pair with each other |
| OP16 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP17 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP18 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP19 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant |
| OP1S | B pucker, unusual combination of ε1, ζ1, α2, β2, bases angled, second syn |
| OP20 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant in 4-way junction |
| OP21 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant in 5'-end dsDNA |
| OP22 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant angled |
| OP23 | B like open, parallel bases |
| OP24 | B like open, low χ2, perpendicular bases |
| OP25 | B-A open, perpendicular bases |
| OP26 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases can pair with each other |
| OP27 | B-A pucker, A like χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP28 | A-B pucker, A like χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP29 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant |
| OP30 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, parallel |
| OP31 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant angled |
| OPS1 | B-A pucker, unusual combination of ε1, ζ1, α2, β2, bases perpendicular, first syn |
| ZZ01 | Z like conformer similar to ZZS2 but both bases anti |
| ZZ02 | Z like conformer similar to ZZ1S with α2/ɣ2 typical values switched to 230/60 and both bases anti |
| ZZ1S | Z form, Y-R step |
| ZZ2S | Z form, Y-R step, δ2 C2'-endo |
| ZZS1 | ZI form, R-Y step |
| ZZS2 | ZII form, R-Y step |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| AA00 | the most frequent, canonical A form |
| AA01 | A like, α2/ɣ2 switch (150/180) |
| AA02 | A-DNA with the B like χ1/χ2 |
| AA03 | A like, similar to AA00, high α2 |
| AA04 | A like, similar to AA00, low α2 |
| AA05 | A like, α2/ɣ2 switch (130/180) |
| AA06 | A like, α2/ɣ2 switch (130/180) |
| AA07 | A form with distant bases, low ζ1 |
| AA08 | A form variant |
| AA09 | A form variant |
| AA10 | A like, α2/ɣ2 switch (210/140) |
| AA11 | A like, α2/ɣ2 switch (90/190) |
| AA12 | A like backbone, bases can be intercalated |
| AA13 | A form with distant bases, low ζ1 |
| AAS1 | A like with first base in syn orientation |
| AB01 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A-B pattern |
| AB02 | A-B: δ1 O4'-endo, extremely low ε1, χ1/χ2 are B like |
| AB03 | A-B: similar to AB01 with high α2 and low ζ1, β2, ɣ2 |
| AB04 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A/B pattern, C'C' high |
| AB05 | A-B: δ1 C3'-endo, δ2 C2'-endo, χ1/χ2 have A/B pattern |
| AB1S | A-B, χ2 syn |
| AB2S | A-B, χ2 syn |
| BA01 | BI-A complex conformer with δ2 from C3' to C4'-exo, χ1/χ2 are B like |
| BA05 | BI-A complex conformer with δ2 from C3' to C4'-exo, χ1/χ2 are B like |
| BA08 | B-A: low β2 |
| BA09 | BI-A: extremely low β2~60, α2/ɣ2 switch (260/170), χ2 A like |
| BA10 | B-A complex cluster: α2~90, ɣ2~180, χ2 A like |
| BA13 | B-A complex cluster: α2~90, ɣ2~180, χ2 A like |
| BA16 | BII-A: χ2 A like |
| BA17 | BII-A: δ2~O4'-endo, β2~130 |
| BB00 | the most frequent DNA conformer, canonical B form, also called BI |
| BB01 | less populated variant of BI form |
| BB02 | BI with α2/ɣ2 typical values switched to 30/300 |
| BB03 | BI with α2/ɣ2 typical values switched to 160/170 |
| BB04 | conformer with torsion transforming BI to BII form |
| BB05 | BI-BII with α2/ɣ2 typical values switched to 70/220, χ2 A like |
| BB07 | BII form, typical by ε1/ζ1 switch compared to BI |
| BB08 | BII form variant with α1/ɣ1 typical values switched to 70/210 |
| BB10 | B form with extremely low values of α2, β2, ɣ2, and low ε1 and ζ1 |
| BB11 | B form with α2/ɣ2 typical values switched to 120/190 and low both ε1 and ζ1 |
| BB12 | BI like with α2/ɣ2 typical values switched to 260/170, low β2 70, χ2 A like |
| BB13 | BI like with α2/ɣ2 typical values switched to 220/160, low β2 70, χ2 A like |
| BB14 | B like with extremely low ε1, high β2 |
| BB15 | BI with high α2 (340) and ɣ2 near 0 |
| BB16 | B like, with χ1 A like |
| BB17 | less populated variant of BI form, very low ε1, α2, β2 |
| BB1S | BI like, unusual β2 and ɣ2, χ2 syn |
| BB20 | B like pucker, χ2 A like, unusual combination of ε1, ζ1, α2, ɣ2, χ2 |
| BB2S | BI like, α2 50, ɣ2 290, χ2 syn |
| BBS1 | BI like, χ1 syn |
| IC01 | A-B backbone, parallel distant bases can be intercalated |
| IC02 | A-B backbone, parallel distant bases can be intercalated |
| IC03 | A-B backbone, parallel distant bases can be intercalated, α2/ɣ2 typical values switched to 70/300, χ2 B like |
| IC04 | A-B backbone, parallel distant bases can be intercalated, α2/ɣ2 typical values switched to 190/180, χ2 B like |
| IC05 | BII backbone, parallel distant bases can be intercalated |
| IC06 | B like, parallel distant bases can be intercalated, χ1 A like |
| IC07 | A like intercalated |
| NANT | Unassigned conformations |
| OP01 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, parallel, low rise |
| OP02 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, angled |
| OP03 | A pucker and χ torsions, unusual combination of backbone torsions, base sangled, can be intercalated |
| OP04 | A pucker and χ torsions, unusual combination of backbone torsions, base sangled, can be intercalated |
| OP05 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, perpendicular |
| OP06 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, low rise |
| OP07 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, low rise |
| OP08 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases parallel, low rise |
| OP09 | A-B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP10 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, parallel |
| OP11 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP12 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP13 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP14 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP15 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases can pair with each other |
| OP16 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, perpendicular |
| OP17 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP18 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP19 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant |
| OP1S | B pucker, unusual combination of ε1, ζ1, α2, β2, bases angled, second syn |
| OP20 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant in 4-way junction |
| OP21 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant in 5'-end dsDNA |
| OP22 | B pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant angled |
| OP23 | B like open, parallel bases |
| OP24 | B like open, low χ2, perpendicular bases |
| OP25 | B-A open, perpendicular bases |
| OP26 | B-A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases can pair with each other |
| OP27 | B-A pucker, A like χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP28 | A-B pucker, A like χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant, angled |
| OP29 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant |
| OP30 | A pucker and χ torsions, unusual combination of backbone torsions, bases distant, parallel |
| OP31 | A pucker and χ torsions, unusual combination of ε1, ζ1, α2, β2, bases distant angled |
| OPS1 | B-A pucker, unusual combination of ε1, ζ1, α2, β2, bases perpendicular, first syn |
| ZZ01 | Z like conformer similar to ZZS2 but both bases anti |
| ZZ02 | Z like conformer similar to ZZ1S with α2/ɣ2 typical values switched to 230/60 and both bases anti |
| ZZ1S | Z form, Y-R step |
| ZZ2S | Z form, Y-R step, δ2 C2'-endo |
| ZZS1 | ZI form, R-Y step |
| ZZS2 | ZII form, R-Y step |