Results 71 to 80 of about 15,229 (210)

Supercoiling response of a bacterial tRNA gene.

, 1985
The effect of DNA supercoiling on transcription of a bacterial tRNA gene has been analysed in vitro and in vivo. The Escherichia coli tyrT gene is found to be completely dependent on negative supercoiling when transcription is assayed in vitro at ...
Lamond, A. I.; id_orcid
core   +1 more source

Controllable DNA Condensation by Mixed Cationic Gemini/Nonionic Surfactant Systems: Structure, Thermodynamics, and Cytotoxicity

Journal of Surfactants and Detergents, EarlyView.
ABSTRACT Controllable DNA condensation is important for nucleic‐acid packaging and non‐viral gene‐delivery systems. This study aimed to determine how the composition of mixed nonionic C12E10 and cationic gemini C12C6C12Br2 surfactants regulates DNA condensation, structure, thermodynamics, and cytotoxicity.
Bo Wang, Linyi Zhu, Yaxun Fan, Yilin Wang   +3 more
wiley   +1 more source

Supercoil formation in DNA denaturation

Physical Review E, 2009
We generalize the Poland-Scheraga (PS) model to the case of a circular DNA, taking into account the twisting of the two strains around each other. Guided by recent single-molecule experiments on DNA strands, we assume that the torsional stress induced by denaturation enforces formation of supercoils whose writhe absorbs the linking number expelled by ...
KABAKCIOGLU A, ORLANDINI, ENZO, MUKAMEL D.   +2 more
openaire   +6 more sources

Advancing Therapies for Mycobacterial Diseases: From Small Molecules to Host‐Directed Strategies

Medicinal Research Reviews, EarlyView.
ABSTRACT The global burden of multidrug‐resistant tuberculosis (MDR‐TB) and the rising incidence of nontuberculous mycobacterial (NTM) infections highlight the urgent need for innovative therapeutic strategies. Current treatments are prolonged, toxic, and increasingly compromised by resistance and limited diagnostic capacity.
Tânia Silva, Alessandra Aiello, Tonino Alonzi, M. Alice Carvalho, Vladimir Finger, Delia Goletti, Sven Hoffner, Yousra Kherabi, Jan Korabecny, Julia Kulczyńska, Agnieszka Kyzioł, Alicia Lacoma, Filomena Martins, Zorica Nanovic, Sepideh Hosseiniporgham, Martina Hrast Rambaher, Leonardo Antonio Sechi, Daria Smalchuk, Grażyna Stochel, Lydia Tabernero, Nancy L. Tateosian, Violeta Valcheva, Anamarija Zega, Mafalda Sarraguça   +23 more
wiley   +1 more source

DNA supercoiling and transcription in bacteria: a two-way street

BMC Molecular and Cell Biology, 2019
Background The processes of DNA supercoiling and transcription are interdependent because the movement of a transcription elongation complex simultaneously induces under- and overwinding of the DNA duplex and because the initiation, elongation and ...
Charles J. Dorman
doaj   +1 more source

An asymmetric sheath controls flagellar supercoiling and motility in the leptospira spirochete

eLife, 2020
Spirochete bacteria, including important pathogens, exhibit a distinctive means of swimming via undulations of the entire cell. Motility is powered by the rotation of supercoiled 'endoflagella' that wrap around the cell body, confined within the ...
Kimberley H Gibson, Felipe Trajtenberg, Elsio A Wunder, Megan R Brady, Fabiana San Martin, Ariel Mechaly, Zhiguo Shang, Jun Liu, Mathieu Picardeau, Albert Ko, Alejandro Buschiazzo, Charles Vaughn Sindelar   +11 more
doaj   +1 more source

Molecular Basis for Uracil‐DNA‐Glycosylase to Identify DNA Damage in the Nucleosome

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT The DNA base‐excision repair (BER) pathway is initiated by a glycosylase, such as uracil‐DNA‐glycosylase (UDG), which identifies and removes a wrong base incorporated in the DNA sequence. The very early steps in the identification of the DNA damage are crucial to the correct initiation of the repair chain, and become even more complex when ...
Safwen Ghediri, Ralf Blossey, Fabrizio Cleri   +2 more
wiley   +1 more source

A Novel Antioxidant Peptide Cath‐Np Derived from Nanorana parkeri Attenuates UVB‐Induced Skin Photodamage in Mice

Integrative Zoology, EarlyView.
Schematic representation of Cath‐Np as an antioxidant suppressing acute skin damage caused by ultraviolet B (UVB) radiation in mice. Cath‐Np inhibits the activation of p53 and mitogen‐activated protein kinase pathways while it activates the Nrf2 pathway by its strong antioxidant effects, and accordingly suppresses the expression of inflammatory factors
Hang Liao, Xiaoxiao Shen, Jinwei Chai, Kai wang, Jiena Wu, Jianxi Yang, Ming Chen, Guoxiang Mo, Xueqing Xu   +8 more
wiley   +1 more source

DNA Supercoiling Measurement in Bacteria [PDF]

, 2017
DNA supercoiling plays critical roles in several essential DNA metabolic pathways, such as replication, transcription and recombination. Typically plasmid DNA molecules are used to measure DNA supercoiling status inside bacterial cells. In this chapter, we describe how to isolate plasmid DNA molecules from E.
Yingting, Liu, Zhi-Chun, Hua, Fenfei, Leng   +2 more
openaire   +2 more sources

Transgenic selection and underlying mechanisms in apicomplexan parasites

The FEBS Journal, EarlyView.
Transgenic selection markers have driven genetic engineering in apicomplexans, enabling precise, iterative experiments. This review discusses mechanistic details of drug selection markers, strategies for marker recycling, and practical considerations for several clinically relevant parasites.
Swaroop Peddiraju, Rakhee Lohia, Nishith Gupta   +2 more
wiley   +1 more source