Source 1primary paper2023Angewandte Chemie International Edition
Toolkit/time-resolved Gd-Gd electron paramagnetic resonance
time-resolved Gd-Gd electron paramagnetic resonance
Also known as: TiGGER
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Time-resolved Gd-Gd electron paramagnetic resonance (TiGGER) is a 240 GHz EPR-based assay method for tracking inter-residue distances during a protein mechanical cycle in the solution state. It is positioned as a method to study triggered functional dynamics in proteins.
Usefulness & Problems
Why this is useful
TiGGER is useful for monitoring time-resolved structural changes in proteins by following Gd-Gd inter-residue distance changes in solution. The available evidence specifically positions it as a complementary approach for studying triggered functional dynamics.
Source:
We present time‐resolved Gd−Gd electron paramagnetic resonance (TiGGER) at 240 GHz for tracking inter‐residue distances during a protein's mechanical cycle in the solution state.
Problem solved
TiGGER addresses the problem of measuring inter-residue distance changes as a protein progresses through a mechanical cycle in the solution state. The evidence supports this general capability but does not further define temporal resolution, distance range, or protein-class specificity.
Problem links
This method is positioned for tracking time-resolved inter-residue distance changes in proteins, which is directly relevant to studying conformational dynamics underlying allostery. It may provide experimental ensemble information to support modeling of proteins that do not adopt one stable structure.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Mechanisms
electron paramagnetic resonance distance measurementtime-resolved tracking of inter-residue distance changesTechniques
Functional AssayTarget processes
No target processes tagged yet.
Input: Magnetic
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
The method is described as a 240 GHz Gd-Gd electron paramagnetic resonance assay performed in the solution state. The evidence implies a requirement for gadolinium-based spin labeling and access to high-field EPR instrumentation, but construct design and sample preparation details are not provided here.
The supplied evidence does not report quantitative performance metrics such as distance precision, time resolution, sensitivity, or throughput. It also does not establish validation breadth across multiple proteins or independent replication beyond the cited source.
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
TiGGER at 240 GHz can track inter-residue distances during a protein mechanical cycle in the solution state.
We present time‐resolved Gd−Gd electron paramagnetic resonance (TiGGER) at 240 GHz for tracking inter‐residue distances during a protein's mechanical cycle in the solution state.
frequency 240 GHz
TiGGER has the potential to complement existing methods for studying triggered functional dynamics in proteins.
TiGGER has the potential to valuably complement existing methods for the study of triggered functional dynamics in proteins.
Approval Evidence
1 source2 linked approval claimsfirst-pass slug time-resolved-gd-gd-electron-paramagnetic-resonance
We present time‐resolved Gd−Gd electron paramagnetic resonance (TiGGER) at 240 GHz for tracking inter‐residue distances during a protein's mechanical cycle in the solution state.
Source:
capabilitysupports
TiGGER at 240 GHz can track inter-residue distances during a protein mechanical cycle in the solution state.
We present time‐resolved Gd−Gd electron paramagnetic resonance (TiGGER) at 240 GHz for tracking inter‐residue distances during a protein's mechanical cycle in the solution state.
Source:
positioningsupports
TiGGER has the potential to complement existing methods for studying triggered functional dynamics in proteins.
TiGGER has the potential to valuably complement existing methods for the study of triggered functional dynamics in proteins.
Source:
Comparisons
Source-backed strengths
The reported strength of TiGGER is its ability to track inter-residue distances during a protein mechanical cycle in solution using high-field 240 GHz EPR. It is also explicitly proposed as a complementary method for investigating triggered functional dynamics in proteins.
Compared with magnetic nanoparticle biosensors
time-resolved Gd-Gd electron paramagnetic resonance and magnetic nanoparticle biosensors address a similar problem space.
Shared frame: same top-level item type; same primary input modality: magnetic
Compared with magnetic resonance elastography
time-resolved Gd-Gd electron paramagnetic resonance and magnetic resonance elastography address a similar problem space.
Shared frame: same top-level item type; same primary input modality: magnetic
Compared with TiGGER
time-resolved Gd-Gd electron paramagnetic resonance and TiGGER address a similar problem space.
Shared frame: same top-level item type; shared mechanisms: time-resolved tracking of inter-residue distance changes; same primary input modality: magnetic
Relative tradeoffs: appears more independently replicated; looks easier to implement in practice.
Ranked Citations
- 1.
Derived from 2 linked claims. Example evidence: We present time‐resolved Gd−Gd electron paramagnetic resonance (TiGGER) at 240 GHz for tracking inter‐residue distances during a protein's mechanical cycle in the solution state.