Advanced TurboID Proximity Labeling Service

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Harness the power of next-generation proteomics with Creative Biolabs' industry-leading TurboID Service. As pioneers with over 20 years in biotechnology, we provide an unparalleled, end-to-end solution for mapping protein-protein interactions (PPIs), identifying constituents of subcellular compartments, and discovering transient or weak interactors directly within living cells and organisms. Move beyond the limitations of traditional methods and uncover a new depth of biological insights.

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The Challenge: Capturing the Dynamic Interactome

Protein-protein interactions form the backbone of virtually every cellular process. However, many of the most critical interactions are transient, weak, or occur within complex, hard-to-isolate cellular microenvironments. Traditional methods like Yeast Two-Hybrid (Y2H) and Co-Immunoprecipitation (Co-IP) often fail to capture this dynamic reality, producing false negatives or requiring harsh lysis conditions that disrupt native interactions.

Proximity Labeling (PL) has emerged as a revolutionary solution. By fusing a protein of interest (POI) to a promiscuous labeling enzyme, researchers can "tag" nearby proteins with a small molecule reporter (biotin) in their native cellular context. TurboID represents the pinnacle of this technology.

The TurboID Principle: Speed, Efficiency, and In Vivo Power

TurboID is an engineered biotin ligase developed through directed evolution of the E. coli enzyme BirA. This evolution has resulted in a hyperactive enzyme that dramatically accelerates the labeling process, overcoming the primary limitation of its predecessor, BioID.

How Our TurboID Service Works:

Our streamlined workflow ensures robust results and a seamless customer experience, from initial project design to publication-ready data.

Strategic Consultation & Design: Our PhD-level experts collaborate with you to design a tailored TurboID strategy that best addresses your unique research question.
TurboID Fusion Construct Generation: We clone your protein of interest (POI) into a vector, fusing it with either TurboID or its smaller version, miniTurbo, at the N- or C-terminus.
Cellular Model Development: We establish expression of the fusion protein in your model system of choice, including mammalian cell lines (stable or transient), yeast, bacteria, or even whole organisms like C. elegans, D. melanogaster, and plants.
Rapid In Vivo Biotinylation: With the simple addition of exogenous biotin, the TurboID-fusion protein promiscuously and covalently labels proximal proteins (within a ~10-15 nm radius) in a rapid 10–30 minute window. We perform rigorous expression and localization validation via Western Blot or immunofluorescence.
Streptavidin Affinity Purification: Cells are gently lysed, and the biotinylated proteins are selectively captured and enriched using high-affinity streptavidin beads.
LC-MS/MS Protein Identification: The enriched proteins are digested and subjected to analysis by our state-of-the-art mass spectrometry platforms (e.g., Orbitrap) for high-resolution, high-sensitivity identification and quantification.
Advanced Bioinformatics & Data Analysis: We process the raw mass spectrometry data, filtering against our comprehensive database of common contaminants to identify true-positive interactors. We provide a complete report, including a list of identified proteins, pathway analysis, and network mapping.

Fig. 1 Establishment of a TurboID-based proximity labeling system.1

The Creative Biolabs Advantage: Why TurboID?

Compared to other proximity labeling methods, TurboID offers a superior combination of speed, sensitivity, and versatility.

Feature	TurboID / miniTurbo	BioID / BioID2	APEX / APEX2
Enzyme	Engineered Biotin Ligase	Mutant Biotin Ligase	Engineered Ascorbate Peroxidase
Substrates	Biotin, ATP	Biotin, ATP	Biotin-Phenol, H₂O₂
Labeling Time	~10-30 minutes	~18-24 hours	< 1 minute
Toxicity	Low (uses natural biotin)	Low (uses natural biotin)	High (requires toxic H₂O₂)
In Vivo Use	Excellent (Flies, Worms, Plants)	Limited by long labeling time	Not suitable for whole organisms
Temporal Resolution	Good	Poor	Excellent
Key Advantage	Fast, non-toxic, ideal for in vivo and sensitive systems	First-generation, simple reagents	High temporal control for cell culture

Cutting-Edge Strategies: miniTurbo and Split-TurboID

Creative Biolabs stays at the forefront of technology by offering the latest iterations of the TurboID platform.

miniTurbo: A smaller, 28 kDa version of TurboID that can reduce potential steric hindrance, making it an excellent choice for proteins where the fusion tag size is a concern.
Split-TurboID: The TurboID enzyme is split into two non-functional fragments. When fused to two different proteins of interest, a strong biotinylation signal is only produced if the two proteins interact, bringing the fragments together. This is a powerful tool for validating specific PPIs or studying the assembly of large protein complexes.

Applications of Our TurboID Service

Our TurboID platform can be applied to a vast array of research questions across multiple disciplines.

Interactome Mapping: Identify the complete interaction network for a specific protein, including weak, transient, or insoluble partners.
Organelle Proteomics: Define the complete protein composition of specific cellular compartments or structures like mitochondria, the ER, lipid droplets, the nucleus, or even non-membranous organelles.
Pathway Elucidation: Uncover novel components of signaling pathways.
Drug Target Discovery: Identify proteins that interact with a drug target or a small molecule bait.
Biomarker Identification: Discover changes in protein interaction networks in disease states compared to healthy controls.
Plant Biology: Overcome the challenges of studying PPIs in plants, where APEX2 is unsuitable.

Our Comprehensive Service Workflow

Phase	Key Steps	Deliverables
I. Project Initiation	Free consultation, experimental strategy design, formal quotation.	Detailed project plan.
II. Construct & Model Prep	Gene synthesis, subcloning into TurboID vector, (optional) lentivirus packaging, stable cell line generation.	Validated expression vector.
III. Proximity Labeling & QC	Expression induction, biotin labeling, confirmation of fusion protein expression and localization via WB/IF.	QC report with images.
IV. Enrichment & MS	Cell lysis, streptavidin pulldown, on-bead digestion, LC-MS/MS analysis.	Raw mass spectrometry data.
V. Bioinformatics & Reporting	Protein identification, data filtering (SAINT, CRAPome), statistical analysis, pathway/network analysis.	Comprehensive final report with publication-quality figures.

Why Choose Creative Biolabs?

Unmatched Expertise: Leverage our 20+ years of experience in protein science and molecular biology. Our team has a deep understanding of the nuances of proximity labeling.
End-to-End Platform: We are your single point of contact for the entire workflow, from gene synthesis to bioinformatics. This integrated approach ensures quality and consistency.
State-of-the-Art Technology: We utilize the latest TurboID variants and cutting-edge mass spectrometry platforms to guarantee the highest data quality.
Complete Customization: Your project is unique. We don't offer one-size-fits-all solutions. We tailor every aspect of the service to your specific model system and research goals.
Dedicated Scientific Support: You will have a dedicated project manager and direct access to our scientists, ensuring transparent communication and expert guidance throughout your project.

Frequently Asked Questions (FAQ)

Q: What is the main difference between TurboID and traditional Co-IP?

A: Co-IP pulls down stable protein complexes that survive cell lysis and washing, requiring direct physical interaction. TurboID identifies proteins in close proximity (~10-15 nm) in living cells, whether they interact directly, transiently, or are simply part of the same local environment. This makes TurboID ideal for discovering novel, weak, or transient interactions missed by Co-IP.

Q: What controls are needed for a TurboID experiment?

A: Proper controls are critical. We strongly recommend including a negative control, such as expressing an untagged TurboID enzyme (e.g., localized to the cytoplasm or nucleus), to help distinguish specific proximal proteins from non-specific background biotinylation.

Q: Can TurboID be used in my specific cell type or organism?

A: Most likely, yes. TurboID has been successfully implemented in a wide range of systems, including mammalian cells, yeast, bacteria, C. elegans, D. melanogaster, and various plants. Contact our experts to discuss the feasibility for your specific model.

Q: How do you distinguish real interactors from background proteins?

A: Our advanced bioinformatics pipeline is key. We process the quantitative data from the mass spectrometer using algorithms like SAINT (Significance Analysis of INTeractome) and filter results against databases of common background proteins (e.g., the CRAPome) to generate a high-confidence list of true interaction partners.

Let's Work Together to Fulfil Your PPI Identification!

Based on the powerful technology platform, we are professional in providing one-stop and tailored solutions to advance PPI detection for our valued customers.

Partner with the Experts in Antibody Discovery

Ready to illuminate your protein's neighborhood? Contact us today to discuss your project with our TurboID specialists and receive a complimentary, no-obligation quote.

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Reference

Wei, Xia-fei, Shan Li, and Jie-li Hu. "A TurboID-based proximity labelling approach for identifying the DNA-binding proteins." STAR protocols 4.1 (2023): 102139. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.1016/j.xpro.2023.102139

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