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cell-free-protein-expression-optimization.md

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1# Cell Free Protein Expression Optimization
2
3**URL:** https://cloud.ginkgo.bio/protocols/cell-free-protein-expression-optimization
4**Service terms:** https://cloud.ginkgo.bio/terms/cfps-optimization
5**Reviewed:** 2026-09-30; prices and turnaround below are catalog estimates.
6**Status:** Ginkgo Certified
7**Price:** $199/sample
8**Turnaround:** up to 11 days
9

Cell Free Protein Expression Optimization

URL: https://cloud.ginkgo.bio/protocols/cell-free-protein-expression-optimization Service terms: https://cloud.ginkgo.bio/terms/cfps-optimization Reviewed: 2026-09-30; prices and turnaround below are catalog estimates. Status: Ginkgo Certified Price: $199/sample Turnaround: up to 11 days

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10## Overview
12Design of Experiment (DoE) approach to expressing protein targets in a proprietary reconstituted E. coli transcription-translation system. Each construct is evaluated in up to 24 reaction conditions per protein, including target-specific additives such as chaperones, disulfide-bond enhancers, and cofactors. Designed for difficult-to-express proteins including membrane proteins and targets with disulfide or cofactor requirements.

Overview

Design of Experiment (DoE) approach to expressing protein targets in a proprietary reconstituted E. coli transcription-translation system. Each construct is evaluated in up to 24 reaction conditions per protein, including target-specific additives such as chaperones, disulfide-bond enhancers, and cofactors. Designed for difficult-to-express proteins including membrane proteins and targets with disulfide or cofactor requirements.

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14## Input
16- **Sequence:** The protocol page currently links a CFPS `.xlsx` template for linear DNA; service terms request protein or DNA in FASTA. Confirm the current intake format before submitting.
17- Specify replicates, linear DNA versus clonal plasmid synthesis, known expression difficulties, and desired additives.

Input

  • Sequence: The protocol page currently links a CFPS .xlsx template for linear DNA; service terms request protein or DNA in FASTA. Confirm the current intake format before submitting.
  • Specify replicates, linear DNA versus clonal plasmid synthesis, known expression difficulties, and desired additives.
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19## Output
21- **Comparative Yield:** Titer data mapped across all tested variables (lysates, temps, additives)
22- **Purity Profiling:** Target protein vs. background impurities to find highest quality yield
23- **Best tested conditions:** Compare electropherograms and yield across the submitted matrix; this identifies candidates among the tested conditions, not a global optimum.

Output

  • Comparative Yield: Titer data mapped across all tested variables (lysates, temps, additives)
  • Purity Profiling: Target protein vs. background impurities to find highest quality yield
  • Best tested conditions: Compare electropherograms and yield across the submitted matrix; this identifies candidates among the tested conditions, not a global optimum.
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25## Automated Workflow

Automated Workflow

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27### Phase 1 - Reagent Prep
291. Retrieve plates from 4 deg C
302. Thaw at room temperature
313. PBS backfill

Phase 1 - Reagent Prep

  1. Retrieve plates from 4 deg C
  2. Thaw at room temperature
  3. PBS backfill
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33### Phase 2 - CFPS Reaction Setup & Incubation
351. Retrieve plates from 4 deg C
362. Dispense lysate
373. QC plate read
384. Incubate (shaking or static, condition-dependent)

Phase 2 - CFPS Reaction Setup & Incubation

  1. Retrieve plates from 4 deg C
  2. Dispense lysate
  3. QC plate read
  4. Incubate (shaking or static, condition-dependent)
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40### Phase 3 - Quantification Prep & Read
421. Dispense PBS
432. Unseal plate
443. LabChip quantification
454. Seal plate
465. Store at 4 deg C

Phase 3 - Quantification Prep & Read

  1. Dispense PBS
  2. Unseal plate
  3. LabChip quantification
  4. Seal plate
  5. Store at 4 deg C
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48## Protocol Parameters
50- Payloads & Reagents
51- Bravo Stamp
52- HiG Centrifuge
53- Incubation & Storage

Protocol Parameters

  • Payloads & Reagents
  • Bravo Stamp
  • HiG Centrifuge
  • Incubation & Storage
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55## Optimization Variables
57The DoE matrix can span up to 24 conditions per protein, varying:
59- **Lysate composition** (different E. coli extract formulations)
60- **Temperature** (incubation temperature profiles)
61- **Additives:**
62 - Chaperones (for folding-challenged targets)
63 - Disulfide-bond enhancers (for targets requiring disulfide bridges)
64 - Cofactors (metal ions, coenzymes, prosthetic groups)
65 - Other target-specific supplements

Optimization Variables

The DoE matrix can span up to 24 conditions per protein, varying:

  • Lysate composition (different E. coli extract formulations)
  • Temperature (incubation temperature profiles)
  • Additives:
  • Chaperones (for folding-challenged targets)
  • Disulfide-bond enhancers (for targets requiring disulfide bridges)
  • Cofactors (metal ions, coenzymes, prosthetic groups)
  • Other target-specific supplements
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67## Ordering
69- **Number of Proteins:** configurable
70- **Number of Replicates:** configurable
71- **File Upload:** CSV, Excel, FASTA, TXT, PDF, ZIP
72- **Additional Details:** free-text field for special requirements

Ordering

  • Number of Proteins: configurable
  • Number of Replicates: configurable
  • File Upload: CSV, Excel, FASTA, TXT, PDF, ZIP
  • Additional Details: free-text field for special requirements
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74## Use Cases
76- Optimizing expression of difficult-to-express proteins
77- Membrane protein expression screening
78- Identifying optimal conditions for disulfide-bonded proteins
79- Cofactor-dependent protein expression
80- Systematic exploration of expression parameter space
81- Finding the best formulation before scaling up production

Use Cases

  • Optimizing expression of difficult-to-express proteins
  • Membrane protein expression screening
  • Identifying optimal conditions for disulfide-bonded proteins
  • Cofactor-dependent protein expression
  • Systematic exploration of expression parameter space
  • Finding the best formulation before scaling up production
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