timsOmni™ Σ

Leverage advanced structural elucidation with MSⁿ EXD coupled to the power of TIMS. timsOmni™ ∑ features a unique blend of technology to deliver maximum versatility:

• TIMS for accurate CCS values to determine conformational heterogeneity
• Precise control of electron-based fragmentation for detailed molecular profiling
• Omnidirectional MSⁿ combined with ion accumulation for unmatched sensitivity
• Trapped EXD mode for optimal precursor utilization, boosting fragment ion yield
• Utilization of all PASEF^® modes for bottom-up proteomics and multiomics

timsOmni™ Σ features unparalleled full scan MS and MSⁿ sensitivity through omnidirectional MSⁿ and precursor enrichment for signal amplification of the lowest abundance ions.

Through precise modulation of selected ion packets, any ion irrespective of its intensity, can be targeted for superior electron-based fragmentation. Made possible by the omnidirectional multi-stage MSⁿ EXD workflow. 

Precisely tune electron energy to investigate various fragmentation regimes and adjust EXD reaction time for optimal results. With access to the entire electron fragmentation landscape, design new solutions toward deep sequencing and structural elucidation.

Trapped EXD 

In trapped ion EXD mode, precursor ions are confined and rapidly fragment upon electron irradiation. Adjusting the trapping time boosts fragment-ion yield and reach optimal precursor consumption (>90%). This unique capability differs from traditional pass-through electron-based fragmentation techniques.

Glycoproteomics presents unique analytical hurdles: labile glycan structures, high heterogeneity and isomeric species raise the need for tools beyond traditional bottom-up.​

timsOmni™ Σ was designed to tackle these challenges head-on, combining Trapped Ion Mobility Spectrometry (TIMS) with multimodal fragmentation to deliver both high-throughput discovery and deep structural characterization of glycopeptides. With PASEF-EXD, researchers can identify more glycopeptides with greater confidence and decipher glycan structures in unprecedented detail using a single instrument platform.

Fit-for-purpose workflows for glycoproteomics​

The timsOmni™ Σ platforms offer an unprecedented control for the fragmentation of PASEF selected precursor ions. Electron fragmentation takes place in the Omnitrap region, trapped ions are confined in the electron beam before travelling through the collision cell where product ions can be further activated, giving researchers the opportunity to adjust conditions for their analytical objectives.​

• Low electron energy (ECD: 0-2 eV) promotes peptide fragments with intact glycans, ideal for O-glycan localization ​

• Higher electron energy (EXD 12-17 eV and EID 35 eV) favors the fragmentation of the glycan and enables structural insights

Cyclic peptides are modular polypeptide chains composed of canonical and non-canonical amino acids that are connected at distant positions to form macrocyclic structures. Large libraries can be easily created for biological screening.​

The timsOmni™ Σ collision-based and electron-based fragmentation techniques are used to linearize and sequence cyclic peptides. The exquisite control on the collision-based and electron-based activation as well as the ability to combine multiple activation steps allows to generate easy-to-read fragment ion ladders for unambiguous characterization.​

timsOmni™ Σ is an evolution of the timsTOF Ultra 2 system developed with improved bottom-up proteomics and a focus on glycopeptides, structural identification of small molecules with EXD capabilities and AIP.​

Peptides and protein groups in a Promega K562 digest measured by DIA-PASEF. A 22 min gradient was used with an Aurora Ultimate column at 250 nL/min flow rate. Results were searched against the Swissprot human database.