Structural highlights
2plb is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | |
| Related: | 115d, 1vj4, 2pkv, 2pl4, 2pl8, 2plo |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Publication Abstract from PubMed
The behaviour of the d(GGTATACC) oligonucleotide has been investigated by X-ray crystallography at 295 K in the range from ambient pressure to 2 GPa (approximately 20,000 atm). Four 3D-structures of the A-DNA form (at ambient pressure, 0.55, 1.09 and 1.39 GPa) were refined at 1.60 or 1.65 A resolution. In addition to the diffraction pattern of the A-form, the broad meridional streaks previously explained by occluded B-DNA octamers within the channels of the crystalline A-form matrix were observed up to at least 2 GPa. This work highlights an important property of nucleic acids, their capability to withstand very high pressures, while keeping in such conditions a nearly invariant geometry of base pairs that store and carry genetic information. The double-helix base-paired architecture behaves as a molecular spring, which makes it especially adapted to very harsh conditions. These features may have contributed to the emergence of a RNA World at prebiotic stage.
Adaptation of the base-paired double-helix molecular architecture to extreme pressure.,Girard E, Prange T, Dhaussy AC, Migianu-Griffoni E, Lecouvey M, Chervin JC, Mezouar M, Kahn R, Fourme R Nucleic Acids Res. 2007;35(14):4800-8. Epub 2007 Jul 7. PMID:17617642[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Girard E, Prange T, Dhaussy AC, Migianu-Griffoni E, Lecouvey M, Chervin JC, Mezouar M, Kahn R, Fourme R. Adaptation of the base-paired double-helix molecular architecture to extreme pressure. Nucleic Acids Res. 2007;35(14):4800-8. Epub 2007 Jul 7. PMID:17617642 doi:gkm511
