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TitlePolymorphic Protective Dps-DNA Co-Crystals by Cryo Electron Tomography and Small Angle X-Ray Scattering.
Journal, issue, pagesBiomolecules, Vol. 10, Issue 1, Year 2019
Publish dateDec 26, 2019
AuthorsRoman Kamyshinsky / Yury Chesnokov / Liubov Dadinova / Andrey Mozhaev / Ivan Orlov / Maxim Petoukhov / Anton Orekhov / Eleonora Shtykova / Alexander Vasiliev /
PubMed AbstractRapid increase of intracellular synthesis of specific histone-like Dps protein that binds DNA to protect the genome against deleterious factors leads to in cellulo crystallization-one of the most ...Rapid increase of intracellular synthesis of specific histone-like Dps protein that binds DNA to protect the genome against deleterious factors leads to in cellulo crystallization-one of the most curious processes in the area of life science at the moment. However, the actual structure of the Dps-DNA co-crystals remained uncertain in the details for more than two decades. Cryo-electron tomography and small-angle X-ray scattering revealed polymorphous modifications of the co-crystals depending on the buffer parameters. Two different types of the Dps-DNA co-crystals are formed in vitro: triclinic and cubic. Three-dimensional reconstruction revealed DNA and Dps molecules in cubic co-crystals, and the unit cell parameters of cubic lattice were determined consistently by both methods.
External linksBiomolecules / PubMed:31888079 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution13.7 Å
Structure data

EMDB-10286:
Cubic Dps-DNA crystal structure in vitro
Method: EM (subtomogram averaging) / Resolution: 13.7 Å

Source
  • Escherichia coli BL21(DE3) (bacteria)

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