DSSR-derived G-quadruplex features in PDB entry 1d59
Poster "DSSR-Enabled Automatic Identification and Annotation of G-quadruplexes in the PDB" presented at the RNA2020 online meeting
Citation: before a paper dedicated to the DSSR-G4 module comes out, please cite the 2015 DSSR paper published in Nucleic Acids Research.
- X-ray (2.3 Å)
- Crystal structure of 4-stranded oxytricha telomeric DNA
- Kang, C., Zhang, X., Ratliff, R., Moyzis, R., Rich, A.: (1992) "Crystal structure of four-stranded Oxytricha telomeric DNA." Nature, 356, 126-131.
- The sequence d(GGGGTTTTGGGG) from the 3' overhang of the Oxytricha telomere has been crystallized and its three-dimensional structure solved to 2.5 A resolution. The oligonucleotide forms hairpins, two of which join to make a four-stranded helical structure with the loops containing four thymine residues at either end. The guanine residues are held together by cyclic hydrogen bonding and an ion is located in the centre. The four guanine residues in each segment have a glycosyl conformation that alternates between anti and syn. There are two four-stranded molecules in the asymmetric unit showing that the structure has some intrinsic flexibility.
- G4 notes
- 8 G-tetrads, 2 G4 helices, 2 G4 stems · (2+2), UDUD
1 glyco-bond=--s- groove=-wn- planarity=0.244 type=other nts=4 GGGG A.DG1,B.DG16,B.DG21,A.DG12 2 glyco-bond=-s-s groove=wnwn planarity=0.284 type=other nts=4 GGGG A.DG2,A.DG11,B.DG22,B.DG15 3 glyco-bond=s-s- groove=wnwn planarity=0.425 type=other nts=4 GGGG A.DG3,A.DG10,B.DG23,B.DG14 4 glyco-bond=-s-s groove=wnwn planarity=0.374 type=other nts=4 GGGG A.DG4,A.DG9,B.DG24,B.DG13 5 glyco-bond=s-s- groove=wnwn planarity=0.320 type=other nts=4 GGGG C.DG25,C.DG36,D.DG45,D.DG40 6 glyco-bond=-s-s groove=wnwn planarity=0.323 type=other nts=4 GGGG C.DG26,C.DG35,D.DG46,D.DG39 7 glyco-bond=s-s- groove=wnwn planarity=0.441 type=bowl nts=4 GGGG C.DG27,C.DG34,D.DG47,D.DG38 8 glyco-bond=-s-s groove=wnwn planarity=0.373 type=other nts=4 GGGG C.DG28,C.DG33,D.DG48,D.DG37