Source 1primary paper2025MED
Toolkit/condensate FLIM-FRET
condensate FLIM-FRET
Also known as: condensate FLIM-FRET, FLIM-FRET
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Condensate-specific lifetimes were used to track protein-protein interactions by measuring FLIM-Förster resonance energy transfer (FRET). We used condensate FLIM-FRET to evaluate whether mRNA decapping complex subunits can form decapping-competent interactions within P-bodies.
Usefulness & Problems
Why this is useful
This assay uses fluorescence lifetime changes within condensates to infer protein-protein interactions by FLIM-FRET. In this paper it is applied to decapping-complex subunits inside P-bodies in live cells.; tracking protein-protein interactions within condensates in live cells; evaluating decapping-complex interactions within P-bodies
Source:
This assay uses fluorescence lifetime changes within condensates to infer protein-protein interactions by FLIM-FRET. In this paper it is applied to decapping-complex subunits inside P-bodies in live cells.
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tracking protein-protein interactions within condensates in live cells
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evaluating decapping-complex interactions within P-bodies
Problem solved
It addresses the difficulty of measuring condensate-specific interactions separately from the surrounding dilute phase in multiphasic RNP condensates.; distinguishing condensate-specific interaction readouts from the surrounding dilute phase
Source:
It addresses the difficulty of measuring condensate-specific interactions separately from the surrounding dilute phase in multiphasic RNP condensates.
Source:
distinguishing condensate-specific interaction readouts from the surrounding dilute phase
Problem links
distinguishing condensate-specific interaction readouts from the surrounding dilute phase
LiteratureIt addresses the difficulty of measuring condensate-specific interactions separately from the surrounding dilute phase in multiphasic RNP condensates.
Source:
It addresses the difficulty of measuring condensate-specific interactions separately from the surrounding dilute phase in multiphasic RNP condensates.
Published Workflows
Fluorescence lifetime sorting reveals tunable enzyme interactions within cytoplasmic condensates.
2025Objective: Develop and apply a FLIM-based live-cell workflow that separates condensates from the dilute phase and measures condensate-specific protein-protein interactions within RNP condensates, including P-bodies.
Why it works: The workflow first resolves condensates from the surrounding dilute phase using lifetime-based phasor filtering and segmentation, then uses condensate-specific lifetimes as the basis for FLIM-FRET interaction measurements inside those condensates.
protein-protein interactions within P-bodiesstress-dependent rewiring of decapping-complex interactionsfluorescence lifetime imaging microscopyphasor plot filteringsegmentationFLIM-FRET
Stages
- 1.Condensate resolution from dilute phase(functional_characterization)
This stage exists because multiphasic condensates create challenges for distinguishing condensate functions from the surrounding dilute phase.
Selection: fluorescence lifetime differences analyzed by phasor plot filtering and segmentation
- 2.Condensate-specific interaction measurement(confirmatory_validation)
After condensates are resolved, condensate-specific lifetimes can be used to track protein-protein interactions within those compartments.
Selection: condensate-specific lifetime changes consistent with FLIM-FRET interaction readout
Steps
- 1.Acquire FLIM data and apply phasor filtering with segmentationassay and analysis method
Resolve condensates from the surrounding dilute phase using fluorescence lifetime information.
This step comes first because condensate-specific measurements require separating condensate signal from dilute-phase background before interaction analysis.
- 2.Measure condensate-specific FLIM-FRET to track interactions in P-bodiesinteraction readout assay
Use condensate-specific lifetimes to infer protein-protein interactions among decapping-complex subunits within P-bodies.
This step follows condensate resolution because the interaction readout depends on condensate-specific lifetime measurements rather than mixed condensate and dilute-phase signals.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Mechanisms
condensate-specific signal separationfluorescence lifetime-based interaction readoutförster resonance energy transferTechniques
Functional AssayTarget processes
No target processes tagged yet.
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
The method requires FLIM imaging, phasor-based lifetime analysis, and fluorescently labeled interaction partners suitable for FRET measurements in live cells.; requires fluorescence lifetime imaging microscopy; requires FRET-compatible labeling of interaction partners; requires live-cell imaging in condensate-containing cells
The abstract does not show that the method directly measures enzymatic output or fully specifies all molecular partners and imaging parameters.; abstract does not specify fluorescent donor-acceptor pair or analysis thresholds
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Core mRNA decapping complex subunit interactions are present within P-bodies under basal conditions.
Condensate FLIM-FRET revealed the presence of core subunit interactions within P-bodies under basal conditions
Oxidative stress disrupts the interaction between Dcp2 and Dcp1A within P-bodies.
the disruption of interactions between the decapping enzyme (Dcp2) and a critical cofactor (Dcp1A) during oxidative stress
Condensate-specific lifetimes measured by FLIM-FRET can be used to track protein-protein interactions within condensates.
Condensate-specific lifetimes were used to track protein-protein interactions by measuring FLIM-Förster resonance energy transfer (FRET).
Approval Evidence
1 source3 linked approval claimsfirst-pass slug condensate-flim-fret
Condensate-specific lifetimes were used to track protein-protein interactions by measuring FLIM-Förster resonance energy transfer (FRET). We used condensate FLIM-FRET to evaluate whether mRNA decapping complex subunits can form decapping-competent interactions within P-bodies.
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biological observationsupports
Core mRNA decapping complex subunit interactions are present within P-bodies under basal conditions.
Condensate FLIM-FRET revealed the presence of core subunit interactions within P-bodies under basal conditions
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context dependent interaction changesupports
Oxidative stress disrupts the interaction between Dcp2 and Dcp1A within P-bodies.
the disruption of interactions between the decapping enzyme (Dcp2) and a critical cofactor (Dcp1A) during oxidative stress
Source:
method applicationsupports
Condensate-specific lifetimes measured by FLIM-FRET can be used to track protein-protein interactions within condensates.
Condensate-specific lifetimes were used to track protein-protein interactions by measuring FLIM-Förster resonance energy transfer (FRET).
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Comparisons
Source-stated alternatives
The abstract contrasts this condensate-resolved FLIM approach with measurements that would otherwise be confounded by the surrounding dilute phase.
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The abstract contrasts this condensate-resolved FLIM approach with measurements that would otherwise be confounded by the surrounding dilute phase.
Source-backed strengths
uses condensate-specific lifetimes to monitor interactions; described as automated and rigorous in live cells
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uses condensate-specific lifetimes to monitor interactions
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described as automated and rigorous in live cells
Compared with Langendorff perfused heart electrical recordings
condensate FLIM-FRET and Langendorff perfused heart electrical recordings address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
Compared with native green gel system
condensate FLIM-FRET and native green gel system address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
condensate FLIM-FRET and sub-picosecond pump-probe analysis of bacteriorhodopsin pigments address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
Ranked Citations
- 1.