DSSO crosslinker


Bis-(propionic acid NHS ester)-sulfoxide, Bis(2,5-dioxopyrrolidin-1-yl) 3,3′-sulfinyldipropionate, Mass spectrometry-cleavable crosslinker for studying protein-protein interations
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available only in USA

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DSSO (disuccinimidyl sulfoxide) crosslinker is a homobifunctional, amine-targeting, sulfoxide-containing crosslinker for analysis of protein-protein interactions (PPIs) through crosslinking mass spectrometry (XL-MS). Membrane-permeable DSSO possesses two N-hydroxysuccinimide (NHS) esters for targeting Lys, a 10.1 Å spacer arm, and two symmetrical C-S cleavable bonds adjacent to the central sulfoxide. The post-cleavage spacer yields tagged peptides for unambiguous identification by collision-induced dissociation in tandem MS. DSSO Crosslinker provides complementary data to thiol-reactive and acidic residue-targeting reagents and will find wide utility in the elucidation of PPIs, study of proteins that function as complexes, quantification of structural dynamics, and the quest for targeting ″undruggable″ protein targets.

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Subject to US Patent #9,222,943 and US Patent Application #15/275,001 of the Regents of the University of California



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Christian E Stieger et al.
Journal of proteome research, 18(3), 1363-1370 (2019-01-30)
Cross-linking mass spectrometry is becoming increasingly popular, and current advances are widening the applicability of the technique so that it can be utilized by nonspecialist laboratories. Specifically, the use of novel mass-spectrometry-cleavable (MS-cleavable) reagents dramatically reduces the complexity of the...
Tara K Bartolec et al.
Analytical chemistry, 92(2), 1874-1882 (2019-12-19)
Saccharomyces cerevisiae has the most comprehensively characterized protein-protein interaction network, or interactome, of any eukaryote. This has predominantly been generated through multiple, systematic studies of protein-protein interactions by two-hybrid techniques and of affinity-purified protein complexes. A pressing question is to...
Clinton Yu et al.
Analytical chemistry, 88(20), 10301-10308 (2016-10-19)
Cross-linking mass spectrometry (XL-MS) represents a recently popularized hybrid methodology for defining protein-protein interactions (PPIs) and analyzing structures of large protein assemblies. In particular, XL-MS strategies have been demonstrated to be effective in elucidating molecular details of PPIs at the...
Lei Lu et al.
Journal of proteome research, 17(7), 2370-2376 (2018-05-26)
Protein chemical cross-linking combined with mass spectrometry has become an important technique for the analysis of protein structure and protein-protein interactions. A variety of cross-linkers are well developed, but reliable, rapid, and user-friendly tools for large-scale analysis of cross-linked proteins...
Athit Kao et al.
Molecular & cellular proteomics : MCP, 10(1), M110-M110 (2010-08-26)
Knowledge of elaborate structures of protein complexes is fundamental for understanding their functions and regulations. Although cross-linking coupled with mass spectrometry (MS) has been presented as a feasible strategy for structural elucidation of large multisubunit protein complexes, this method has...
Learn about homobifunctional sulfoxide-containing MS-cleavable cross-linkers that enables the capture of protein-protein interactions (PPIs) in native cellular environments, and the identification of cross-linked peptides permits the determination of both identity and connectivity of PPIs.
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