Genomic DNA is constantly under threat from intracellular and environmental factors that damage its chemical structure. Uncorrected DNA damage may impede cellular propagation or even result in cell death, making it critical to restore genomic integrity. Decades of research have revealed a wide range of mechanisms through which repair factors recognize damage and co-ordinate repair processes. In recent years, single-molecule live-cell imaging methods have further enriched our understanding of how repair factors operate in the crowded intracellular environment. The ability to follow individual biochemical events, as they occur in live cells, makes single-molecule techniques tremendously powerful to uncover the spatial organization and temporal regulation of repair factors during DNA–repair reactions. In this review, we will cover practical aspects of single-molecule live-cell imaging and highlight recent advances accomplished by the application of these experimental approaches to the study of DNA–repair processes in prokaryotes.
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Cover Image
Cover Image
In this issue of Biochemical Society Transactions, Elliott and Jones review some of the techniques used to prepare, measure and analyse the electron transfer properties of metalloproteins, concentrating on scanning tunnelling microscopy-based techniques and advances in attachment of proteins to electrodes. The cover image, taken from Figure 2 in the review, shows the direct attachment of a protein (cytochrome b562) to gold substrate through an engineered cysteine residue. For further information see pages 1–9.
Single-molecule live-cell imaging of bacterial DNA repair and damage tolerance
Harshad Ghodke, Han Ho, Antoine M. van Oijen; Single-molecule live-cell imaging of bacterial DNA repair and damage tolerance. Biochem Soc Trans 19 February 2018; 46 (1): 23–35. doi: https://doi.org/10.1042/BST20170055
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