Source 1primary paper2025MED
Toolkit/sequence-activated fluorescent RNA
sequence-activated fluorescent RNA
Also known as: SaFR
Taxonomy: Mechanism Branch / Component. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Here, we describe the development of a sequence-activated fluorescent RNA (SaFR) technique.
Usefulness & Problems
Why this is useful
SaFR is a sequence-activated fluorescent RNA probe that becomes fluorogenic when target RNA induces reorganization into a Pepper-like fluorescent conformation. It is presented as a tool for imaging endogenous RNA in cells.; labelling and imaging endogenous RNA in cells; tracking exogenous or endogenous RNAs in live and fixed cells; monitoring stress granule assembly and disassembly in real time
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SaFR is a sequence-activated fluorescent RNA probe that becomes fluorogenic when target RNA induces reorganization into a Pepper-like fluorescent conformation. It is presented as a tool for imaging endogenous RNA in cells.
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labelling and imaging endogenous RNA in cells
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tracking exogenous or endogenous RNAs in live and fixed cells
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monitoring stress granule assembly and disassembly in real time
Problem solved
It addresses the need for robust and specific imaging of RNA in its native state. The method enables tracking of exogenous or endogenous RNAs in live and fixed cells.; provides sequence-activated fluorescent readout for RNA imaging in native cellular contexts
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It addresses the need for robust and specific imaging of RNA in its native state. The method enables tracking of exogenous or endogenous RNAs in live and fixed cells.
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provides sequence-activated fluorescent readout for RNA imaging in native cellular contexts
Problem links
provides sequence-activated fluorescent readout for RNA imaging in native cellular contexts
LiteratureIt addresses the need for robust and specific imaging of RNA in its native state. The method enables tracking of exogenous or endogenous RNAs in live and fixed cells.
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It addresses the need for robust and specific imaging of RNA in its native state. The method enables tracking of exogenous or endogenous RNAs in live and fixed cells.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Component: A low-level RNA part used inside a larger architecture that realizes a mechanism.
Mechanisms
conformational uncagingConformational Uncagingfluorogenic aptamer activationtarget rna-induced structural reorganizationTechniques
No technique tags yet.
Target processes
No target processes tagged yet.
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensorswitch architecture: uncaging
The abstract indicates that SaFR requires the engineered RNA probe, a target RNA sequence, and Pepper cognate fluorophores. Its inactive state is maintained by an invader sequence until target binding occurs.; depends on a fluorogenic RNA design containing an invader sequence; requires Pepper cognate fluorophores for fluorescence activation
The abstract does not show that SaFR is target-independent or universally applicable without sequence-specific design. It also does not establish performance against all alternative RNA imaging platforms.; requires target RNA to trigger conformational reorganization into the fluorogenic Pepper state
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Observations
successMammalian Cell Lineapplication demo
RNA imaging
Inferred from claim cl4 during normalization. SaFR can track exogenous or endogenous RNAs in live and fixed cells. Derived from claim cl4.
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Supporting Sources
Ranked Claims
SaFR was used to monitor stress granule assembly and disassembly in real time.
SaFR can track exogenous or endogenous RNAs in live and fixed cells.
In SaFR, an invader sequence disrupts the fluorogenic RNA structure and prevents activation of Pepper cognate fluorophores in the absence of target RNA, whereas target RNA induces conformational reorganization into the fluorogenic Pepper state and enables fluorescence.
SaFR exhibits large dynamic ranges, high specificity, and fast fluorescence generation.
The paper describes development of the sequence-activated fluorescent RNA technique SaFR.
Approval Evidence
1 source5 linked approval claimsfirst-pass slug sequence-activated-fluorescent-rna
Here, we describe the development of a sequence-activated fluorescent RNA (SaFR) technique.
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application demosupports
SaFR was used to monitor stress granule assembly and disassembly in real time.
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application scopesupports
SaFR can track exogenous or endogenous RNAs in live and fixed cells.
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mechanismsupports
In SaFR, an invader sequence disrupts the fluorogenic RNA structure and prevents activation of Pepper cognate fluorophores in the absence of target RNA, whereas target RNA induces conformational reorganization into the fluorogenic Pepper state and enables fluorescence.
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performance statementsupports
SaFR exhibits large dynamic ranges, high specificity, and fast fluorescence generation.
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tool developmentsupports
The paper describes development of the sequence-activated fluorescent RNA technique SaFR.
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Comparisons
Source-stated alternatives
The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
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The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Source-backed strengths
large dynamic ranges; high specificity; fast fluorescence generation; works in live and fixed cells
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large dynamic ranges
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high specificity
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fast fluorescence generation
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works in live and fixed cells
Compared with imaging
The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Shared frame: source-stated alternative in extracted literature
Strengths here: large dynamic ranges; high specificity; fast fluorescence generation.
Relative tradeoffs: requires target RNA to trigger conformational reorganization into the fluorogenic Pepper state.
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The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Compared with imaging surveillance
The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Shared frame: source-stated alternative in extracted literature
Strengths here: large dynamic ranges; high specificity; fast fluorescence generation.
Relative tradeoffs: requires target RNA to trigger conformational reorganization into the fluorogenic Pepper state.
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The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Compared with Pepper
The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Shared frame: source-stated alternative in extracted literature
Strengths here: large dynamic ranges; high specificity; fast fluorescence generation.
Relative tradeoffs: requires target RNA to trigger conformational reorganization into the fluorogenic Pepper state.
Source:
The source frames SaFR against the general need for RNA imaging technologies but does not explicitly benchmark named alternatives in the abstract. Pepper is described as the fluorogenic platform component within SaFR rather than an external alternative.
Ranked Citations
- 1.