Photo-caged 2-butene-1,4-dial as an efficient, target-specific photo-crosslinker for covalent trapping of DNA-binding proteins.

ABSTRACT: Covalent trapping of DNA-binding proteins via photo-crosslinking is an advantageous method for studying DNA-protein interactions. However, traditional photo-crosslinkers generate highly reactive intermediates that rapidly and non-selectively react with nearby functional groups, resulting in low target-capture yields and high non-target background capture. Herein, we report that photo-caged 2-butene-1,4-dial (PBDA) is an efficient photo-crosslinker for trapping DNA-binding proteins. Photo-irradiation (360 nm) of PBDA-modified DNA generates 2-butene-1,4-dial (BDA), a small, long-lived intermediate that reacts selectively with Lys residues of DNA-binding proteins, leading in minutes to stable DNA-protein crosslinks in up to 70% yield. In addition, BDA exhibits high specificity for targ

SUBMITTER: Li J 

PROVIDER: S-EPMC10566456 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature