Summary information [schematics · tetrads · helices · stems · costacks · homepage]

PDB-id
5j4p
Class
DNA
Method
NMR
Summary
Diy G-quadruplexes: solution structure of d(ggtttggttttggtttgg) in sodium
Reference
Dvorkin, S.A., Karsisiotis, A.I., Webba da Silva, M.: (2018) "Encoding canonical DNA quadruplex structure." Sci Adv, 4, eaat3007-eaat3007.
Abstract
The main challenge in DNA quadruplex design is to encode a three-dimensional structure into the primary sequence, despite its multiple, repetitive guanine segments. We identify and detail structural elements describing all 14 feasible canonical quadruplex scaffolds and demonstrate their use in control of design. This work outlines a new roadmap for implementation of targeted design of quadruplexes for material, biotechnological, and therapeutic applications.
G4 notes
2 G-tetrads, 1 G4 helix, 1 G4 stem · 2(-LwD+Ln), basket(2+2), UDDU

Base-block schematics in six views [summary · tetrads · helices · stems · costacks · homepage]

PyMOL session file PDB file View in 3Dmol.js

List of 2 G-tetrads [summary · schematics · helices · stems · costacks · homepage]

 1 glyco-bond=s--s groove=w-n- planarity=0.073 type=planar nts=4 GGGG A.DG1,A.DG7,A.DG18,A.DG12
 2 glyco-bond=-.s- groove=..n- planarity=0.087 type=planar nts=4 GGGG A.DG2,A.DG6,A.DG17,A.DG13

List of 1 G4-helix [summary · schematics · tetrads · stems · costacks · homepage]

In DSSR, a G4-helix is defined by stacking interactions of G-tetrads, regardless of backbone connectivity, and may contain more than one G4-stem.

Helix#1, 2 G-tetrad layers, INTRA-molecular, with 1 stem

 1  glyco-bond=s--s groove=w-n- Major-->WC nts=4 GGGG A.DG1,A.DG7,A.DG18,A.DG12
 2  glyco-bond=-.s- groove=..n- WC-->Major nts=4 GGGG A.DG2,A.DG6,A.DG17,A.DG13
  step#1  mm(<>,outward)  area=12.60 rise=3.06 twist=18.5
  strand#1 DNA glyco-bond=s- nts=2 GG A.DG1,A.DG2
  strand#2 DNA glyco-bond=-. nts=2 GG A.DG7,A.DG6
  strand#3 DNA glyco-bond=-s nts=2 GG A.DG18,A.DG17
  strand#4 DNA glyco-bond=s- nts=2 GG A.DG12,A.DG13

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1 stacking diagram
 1  glyco-bond=s--s groove=w-n- Major-->WC nts=4 GGGG A.DG1,A.DG7,A.DG18,A.DG12
2 glyco-bond=-.s- groove=..n- WC-->Major nts=4 GGGG A.DG2,A.DG6,A.DG17,A.DG13
step#1 mm(<>,outward) area=12.60 rise=3.06 twist=18.5

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List of 1 G4-stem [summary · schematics · tetrads · helices · costacks · homepage]

In DSSR, a G4-stem is defined as a G4-helix with backbone connectivity. Bulges are also allowed along each of the four strands.

Stem#1, 2 G-tetrad layers, 3 loops, INTRA-molecular, UDDU, anti-parallel, 2(-LwD+Ln), basket(2+2)

 1  glyco-bond=s--s groove=w-n- Major-->WC nts=4 GGGG A.DG1,A.DG7,A.DG18,A.DG12
 2  glyco-bond=-.s- groove=..n- WC-->Major nts=4 GGGG A.DG2,A.DG6,A.DG17,A.DG13
  step#1  mm(<>,outward)  area=12.60 rise=3.06 twist=18.5
  strand#1  U DNA glyco-bond=s- nts=2 GG A.DG1,A.DG2
  strand#2  D DNA glyco-bond=-. nts=2 GG A.DG7,A.DG6
  strand#3  D DNA glyco-bond=-s nts=2 GG A.DG18,A.DG17
  strand#4  U DNA glyco-bond=s- nts=2 GG A.DG12,A.DG13
  loop#1 type=lateral   strands=[#1,#2] nts=3 TTT A.DT3,A.DT4,A.DT5
  loop#2 type=diagonal  strands=[#2,#4] nts=4 TTTT A.DT8,A.DT9,A.DT10,A.DT11
  loop#3 type=lateral   strands=[#4,#3] nts=3 TTT A.DT14,A.DT15,A.DT16

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List of 0 G4 coaxial stacks [summary · schematics · tetrads · helices · stems · homepage]

List of 0 non-stem G4-loops (including the two closing Gs)