| Version | Summary | Created by | Modification | Content Size | Created at | Operation |
|---|---|---|---|---|---|---|
| 1 | Yu Peng | -- | 163 | 2026-09-24 08:46:53 |
DNA–protein interaction is the reversible molecular association of a protein with DNA through noncovalent contacts that recognize nucleotide sequence, local DNA shape, helical geometry, chemical modifications, or higher-order nucleic-acid structures. The interaction is formed by combinations of electrostatic attraction between basic protein residues and the DNA phosphate backbone, hydrogen bonds, van der Waals contacts, water-mediated interactions, and contacts with exposed base edges in the major or minor groove [1][2]. DNA-binding proteins may engage DNA in sequence-selective or structure-selective binding modes and can recognize local conformational properties such as groove width, base-pair geometry, bending propensity, or single-stranded and noncanonical DNA structures [2][3]. Binding affinity, specificity, stoichiometry, cooperativity, residence time, and protein-induced conformational changes define the molecular properties of an individual DNA–protein complex [1][4]. Such interactions comprise the direct physical associations through which proteins access, organize, replicate, transcribe, repair, recombine, or package DNA [3][4].