Methyltetrazine-Sulfo-NHS ester sodium | CAS 1821017-46-2

Methyltetrazine-Sulfo-NHS ester sodium is a sulfonated N-hydroxysuccinimide (NHS) ester click reagent that couples readily to primary amines on proteins, peptides, and other amine-bearing biomolecules before engaging in fast, bioorthogonal tetrazine-mediated inverse-electron-demand cycloaddition. Its methyltetrazine functionality enables efficient labeling for downstream click conjugation workflows, while the sulfonate handle supports aqueous compatibility and improved solubility for imaging and assay development. This reagent is widely used in chemical biology and molecular imaging pipelines where controlled introduction of a tetrazine moiety is required on targeting ligands, carriers, or detection constructs.

1. Protein Labeling Workflows

Methyltetrazine-Sulfo-NHS ester sodium is commonly used to functionalize antibodies, antibody fragments, enzymes, and other amine-containing proteins with a tetrazine handle for subsequent click conjugation. Researchers and imaging teams often select this reagent when they need to prepare tetrazine-modified biomolecules that can later be coupled to complementary strained-alkene or trans-cyclooctene partners under mild, water-compatible conditions. The sulfonated NHS-ester design supports practical conjugation in aqueous buffers, enabling efficient preparation of labeling reagents used for probe generation, multicomponent assembly, and platform screening in chemical biology laboratories.

2. Molecular Imaging Probe Assembly

Methyltetrazine-Sulfo-NHS ester sodium is suited for building modular imaging probes by first installing tetrazine functionality onto targeting vectors or scaffold proteins, followed by rapid click attachment of an imaging reporter. In molecular imaging and diagnostic reagent development, this approach supports the generation of conjugates where the tetrazine-bearing component can be paired with fluorophores, radiolabeling intermediates, or other signal-bearing constructs through a second-step bioorthogonal ligation. The reagent’s sulfonate-bearing character and NHS-ester chemistry make it a practical choice for preparing aqueous-compatible probe precursors that integrate cleanly into iterative probe optimization workflows.

3. Targeting Ligand Conjugation

Methyltetrazine-Sulfo-NHS ester sodium is frequently applied to decorate targeting ligands such as peptides, affibodies, nanobodies, and other engineered binders that present accessible primary amines. By introducing tetrazine groups onto these molecules, teams can create versatile conjugation intermediates for downstream attachment of imaging tags, enrichment handles, or assay-compatible reporters using click partners selected for the intended readout. This reagent is especially useful when the workflow requires a stable, water-soluble tetrazine-bearing intermediate that can be produced in a straightforward manner from amine-functionalized ligands.

4. Surface and Material Functionalization

Methyltetrazine-Sulfo-NHS ester sodium is used to functionalize amine-rich surfaces and biomaterials that serve as platforms for click-based assembly, including polymer coatings, porous supports, and hydrogel components bearing reactive amines. Material scientists and assay developers often incorporate this reagent to immobilize tetrazine groups onto substrates, enabling subsequent attachment of complementary clickable components such as fluorescent reporters, affinity tags, or capture elements. The sulfonate functionality supports handling in aqueous environments, which aligns with common surface modification protocols used to generate spatially addressable or modular material constructs for research and industrial R&D settings.

5. Diagnostic Reagent Development

Methyltetrazine-Sulfo-NHS ester sodium supports the creation of diagnostic and analytical chemistry reagents that rely on modular conjugation strategies, where a tetrazine-functional intermediate is prepared and later combined with a complementary click partner. In reagent development workflows, this enables controlled assembly of multicomponent detection systems such as labeled binding reagents, assay-compatible conjugates, and enrichment probes that can be generated by sequential functionalization steps. The NHS ester chemistry allows installation onto amine-bearing components used in assay formats, while the tetrazine handle provides a reliable basis for downstream click coupling to generate consistent reagent sets for screening and method development.