Toolkit/phyB/PIF3

phyB/PIF3

Multi-Component Switch·Research·Since 2014

Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

phyB/PIF3 is a red-light-regulated multi-component optical dimerizer system benchmarked in a yeast transcriptional assay. It uses light-controlled heterodimerization between phyB and PIF3 to regulate transcriptional output.

Usefulness & Problems

Why this is useful

This system is useful as an optogenetic dimerizer for controlling transcription with light in yeast assay formats. The available evidence specifically indicates that it can be compared against other optical dimerizer systems for light sensitivity and fold-activation behavior.

Problem solved

phyB/PIF3 helps address the problem of externally controlling transcriptional activity with a light-responsive protein interaction module. The supplied evidence supports its use in benchmarking red-light-regulated transcriptional control in yeast.

Problem links

Need precise spatiotemporal control with light input

Derived

phyB/PIF3 is a light-controlled multi-component optical dimerizer system benchmarked in a yeast transcriptional assay. It uses red-light-regulated heterodimerization to control transcriptional output.

Need tighter control over gene expression timing or amplitude

Derived

phyB/PIF3 is a light-controlled multi-component optical dimerizer system benchmarked in a yeast transcriptional assay. It uses red-light-regulated heterodimerization to control transcriptional output.

Taxonomy & Function

Primary hierarchy

Mechanism Branch

Architecture: A composed arrangement of multiple parts that instantiates one or more mechanisms.

Target processes

transcription

Input: Light

Implementation Constraints

cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: multi component delivery burdenimplementation constraint: spectral hardware requirementoperating role: regulatorswitch architecture: multi componentswitch architecture: recruitment

The evidence places phyB/PIF3 in a yeast transcriptional assay and identifies it as a multi-component optical dimerizer composed of phyB and PIF3. No further construct architecture, chromophore requirement, expression strategy, or illumination parameters are provided in the supplied evidence.

The supplied evidence does not provide quantitative performance values, dynamic range, kinetics, reversibility, or implementation details for phyB/PIF3. Independent replication and validation outside the cited yeast transcriptional benchmark are not established by the provided material.

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Ranked Claims

Claim 1benchmark resultsupports2014Source 1needs review

The red-light-regulated systems phyB/PIF3 and phyB/PIF6 showed significant differences in light sensitivity and fold-activation levels in a yeast transcriptional assay.

Using a yeast transcriptional assay, we find significant differences in light sensitivity and fold-activation levels between the red light regulated systems

Approval Evidence

1 source1 linked approval claimfirst-pass slug phyb-pif3
Here, we set about to systematically benchmark the properties of four optical dimerizer systems, CRY2/CIB1, TULIPs, phyB/PIF3, and phyB/PIF6.

Source:

benchmark resultsupports

The red-light-regulated systems phyB/PIF3 and phyB/PIF6 showed significant differences in light sensitivity and fold-activation levels in a yeast transcriptional assay.

Using a yeast transcriptional assay, we find significant differences in light sensitivity and fold-activation levels between the red light regulated systems

Source:

Comparisons

Source-backed strengths

The available literature evidence shows that phyB/PIF3 was included in a systematic benchmark of optical dimerizer systems. In that yeast transcriptional assay, phyB/PIF3 exhibited measurable light sensitivity and fold-activation characteristics that were sufficiently robust for comparison with phyB/PIF6 and other systems.

Compared with iLID/SspB

phyB/PIF3 and iLID/SspB address a similar problem space because they share transcription.

Shared frame: same top-level item type; shared target processes: transcription; shared mechanisms: heterodimerization; same primary input modality: light

Relative tradeoffs: appears more independently replicated; looks easier to implement in practice.

Compared with LITEs (Light-inducible transcriptional effectors)

phyB/PIF3 and LITEs (Light-inducible transcriptional effectors) address a similar problem space because they share transcription.

Shared frame: same top-level item type; shared target processes: transcription; shared mechanisms: heterodimerization; same primary input modality: light

Compared with LOVpep/ePDZb

phyB/PIF3 and LOVpep/ePDZb address a similar problem space because they share transcription.

Shared frame: same top-level item type; shared target processes: transcription; shared mechanisms: heterodimerization; same primary input modality: light

Relative tradeoffs: appears more independently replicated; looks easier to implement in practice.

Ranked Citations

  1. 1.
    FoundationalSource 1ACS Synthetic Biology2014Claim 1

    Derived from 1 linked claims. Example evidence: Using a yeast transcriptional assay, we find significant differences in light sensitivity and fold-activation levels between the red light regulated systems