Disuccinimidyl Suberate

Disuccinimidyl Suberate (CAS No.: 68528-80-3) is a membrane-permeable, amine-reactive bifunctional crosslinking reagent widely employed in biochemical and cell biology research to stabilize protein–protein and protein–biomolecule interactions. Containing two N-hydroxysuccinimide ester groups, it selectively reacts with primary amines, such as lysine residues and N-terminal amino groups, enabling the formation of covalent linkages between proximal biomolecules. This reactivity underlies its utility in probing protein architecture, mapping interaction networks, and capturing transient or weak associations within native cellular environments. Disuccinimidyl Suberate is commonly applied in intact cell systems and in vitro assays to investigate oligomerization states, receptor clustering, and multiprotein complex assembly, thereby supporting mechanistic studies in signaling pathways and structural biology. While it does not act on a specific molecular target or signaling pathway, its crosslinking activity facilitates downstream analytical techniques such as immunoblotting, mass spectrometry, and proteomics-based interaction mapping. Experimental use typically involves concentrations in the low micromolar to millimolar range, with conditions tailored to the biological system and desired crosslinking efficiency. Its broad applicability in protein chemistry and drug discovery workflows makes it a valuable tool for elucidating biomolecular interactions and validating therapeutic targets.