Results 61 to 70 of about 119,546 (241)

Single-Molecule Structure and Topology of Kinetoplast DNA Networks

Physical Review X, 2023
Kinetoplast DNA (kDNA) is a two-dimensional Olympic-ring-like network of mutually linked DNA minicircles found in certain parasites called trypanosomes.
Pinyao He, Allard J. Katan, Luca Tubiana, Cees Dekker, Davide Michieletto   +4 more
doaj   +1 more source

UiO‐66 metal–organic frameworks in biomedicine: From structural tunability to bioimaging, photodiagnostics, and photodynamic cancer therapy

FEBS Open Bio, EarlyView.
UiO‐66(Zr) metal–organic frameworks are chemically stable, biocompatible, and highly tunable nanomaterials. Their modular structure enables controlled drug delivery, multimodal bioimaging, and light‐activated photodynamic therapy, supporting integrated diagnostic and therapeutic (theranostic) applications in cancer and biomedical research.
Veronika Huntošová, Grigorii Rakhalskii, Miroslav Almáši   +2 more
wiley   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Quantifying complexity in DNA structures with high resolution Atomic Force Microscopy

Nature Communications
DNA topology is essential for regulating cellular processes and maintaining genome stability, yet it is challenging to quantify due to the size and complexity of topologically constrained DNA molecules.
Elizabeth P. Holmes, Max C. Gamill, James I. Provan, Laura Wiggins, Renáta Rusková, Sylvia Whittle, Thomas E. Catley, Kavit H. S. Main, Neil Shephard, Helen. E. Bryant, Neville S. Gilhooly, Agnieszka Gambus, Dušan Račko, Sean D. Colloms, Alice L. B. Pyne   +14 more
doaj   +1 more source

Importin 7 mediates the nuclear import of HIV‐1 integrase via a specific interacting interface

FEBS Open Bio, EarlyView.
HIV‐1 integrase enables viral DNA integration into the host genome. By binding to the core domain of the host protein Importin 7 via its C‐terminal domain, the integrase is transported across the nuclear membrane into the nucleus, where integration of the viral genome into host DNA takes place. This translocation is a critical step for subsequent viral
Juana Bana, Avigail Yariv, Tal Oppenheim, Hadar Amartely, Dana Reichmann, Oded Livnah   +5 more
wiley   +1 more source

DNA supercoiling-mediated G4/R-loop formation tunes transcription by controlling the access of RNA polymerase

Nature Communications
RNA polymerase (RNAP) is a processive motor that modulates DNA supercoiling and reshapes DNA structures. The feedback loop between the DNA topology and transcription remains elusive.
Jihee Hwang, Chun-Ying Lee, Sumitabha Brahmachari, Shubham Tripathi, Tapas Paul, Huijin Lee, Alanna Craig, Taekjip Ha, Sua Myong   +8 more
doaj   +1 more source

A TOPOLOGICAL FRAMEWORK FOR DNA REPLICATION

JP Journal of Geometry and Topology
DNA replication, a vital biological function, can be effectively modelled as a two-component link. As this link splits during replication, the double-helical nature of DNA leads to the formation of supercoils¾essentially, entanglement. To untangle these supercoils, DNA segments must be exchanged, a task performed by enzymes called topoisomerases.
Mohamad, Abdul Adheem, Yashiro, Tsukasa
openaire   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

Increasing the activity of DNAzyme based on the telomeric sequence: 2’-OMe-RNA and LNA modifications

Open Chemistry, 2019
2’-OMe-RNA analogues and LNA point modifications of DNA oligonucleotides were applied for the modulation of the G-quadruplex topology and enhancement of peroxidase activity of the resulting DNAzymes.
Kosman J., Żukowski K., Juskowiak B.
doaj   +1 more source

The unique DNA topology and DNA topoisomerases of hyperthermophilic archaea [PDF]

FEMS Microbiology Reviews, 1996
Hyperthermophilic archaea exhibit a unique pattern of DNA topoisomerase activities. They have a peculiar enzyme, reverse gyrase, which introduces positive superturns into DNA at the expense of ATP. This enzyme has been found in all hyperthermophiles tested so far (including Bacteria) but never in mesophiles.
P, Forterre, A, Bergerat, P, Lopez-Garcia   +2 more
openaire   +2 more sources