DNA-binding protein
(重定向自DNA binding protein)


![The lambda repressor helix-turn-helix transcription factor bound to its DNA target[1]](/uploads/202501/09/Lambda_repressor_1LMB1015.png)
![The restriction enzyme EcoRV (green) in a complex with its substrate DNA[2]](/uploads/202501/09/EcoRV_1RVA1015.png)
DNA-binding proteins are proteins that are composed of DNA-binding domains and thus have a specific or general affinity for either single or double stranded DNA. Sequence-specific DNA-binding proteins generally interact with the major groove of B-DNA, because it exposes more functional groups that identify a base pair. However there are some known minor groove DNA-binding ligands such as netropsin, distamycin, Hoechst 33258, pentamidine, DAPI and others.