1 Construction and Verification of c-di-GMP Expression Vector in Escherichia coli
Construction and Functional Characterization of pBBR1-MCS5-PfnrS-yedQ Plasmid
Extraction of pBBR1-MCS5-yedQ plasmid
Day 1
Genomic DNA from E. coli MG1655 and primer design
Day 2
Amplification of linearized pBBR1-MCS5-yedQ (Y2, Y3) and PfnrS (F1, F2, F3) fragments
Day 3
Amplification of linearized pBBR1-MCS5-yedQ (Y1)
Day 4
Gel electrophoresis to verify the 3.4 PCR products and purification
Day 5
Primer Design
Day 6
Gibson assembly and transformation
Day 7
Gibson assemblies (Y2-F2 and Y3-F3) and transformation
Day 8
Colony PCR
Day 9
Plasmid extraction from the 9 colonies picked on 3.10
Day 10
PCR and gel electrophoresis for the 9 plasmids extracted on 3.11
Day 11
Designed verification primer set 2
Day 12
PCR of the 9 plasmids using primer set PfnrS-certify2-FR
Day 13
Repeat PCR using new reagents
Day 14
pBBR1-MCS5-yedQ plasmid certify
Day 15
Colony PCR
Day 16
pBBR1-MCS5-yedQ-PfnrS plasmid
Day 17
Bacterial resuscitation and Microaerobic Aerobic culture
Day 18
ELISA validation of c-di-GMP production
Day 19
Bacterial resuscitation
Day 20
ELISA
Day 21
Bacterial resuscitation and culture under Aerobic, Microaerobic, Anaerobic environments
Day 22
ELISA and CFU measurement
Day 23
Bacterial resuscitation and culture
Day 24
ELISA
Day 25
Bacterial Transformation of the pBBR1-MCS5 empty vector
Day 26
Bacterial glycerol stock
Day 26
Bacterial resuscitation and culture with IBMX
Day 27
ELISA
Day 28
Construction and Functional Characterization of the pUCP20-GmR-PfnrS-yedQ Plasmid
Bacteria recover and Primer Design
Day 1
Plasmid Extraction and Amplification for Vector Linearization and GmR Fragment
Day 2
Repeat PCR for pUCP20 Backbone Linearization
Day 3
Gibson Assembly for Cloning GmR Cassette into pUCP20
Day 4
PCR Amplification of PfnrS-yedQ Fragment
Day 5
PCR Linearization of pUCP20-GmR Vector
Day 6
Re-optimized PCR for pUCP20-GmR Linearization
Day 7
Next-Generation Sequencing of Linearized pUCP20-GmR
Day 8
Gibson Assembly for Final Construct
Day 9
Colony PCR Screening for Positive Clones
Day 10
ELISA verification (pUCP20-GmR Vector)
Day 11
Assessment of anaerobic promoter PfnrS Conditional Efficiency under Aerobic and Anaerobic Environments in E. coli
Primer Design
Day 1
PCR for Linearization and fragments
Day 2
DNA Purification
Day 3
Gibson Assembly Reaction and Bacterial Transformation
Day 4
Verification of Clones
Day 5
Sequencing
Day 6
PCR Repeated
Day 7
Gel Extraction and Gibson Assembly
Day 8
Verification of Clones again
Day 9
Colony PCR and Sequencing
Day 10
Bbacterial Glycerol Cryopreservation
Day 11
Bacterial Culture Setup
Day 12
Measurement
Day 13
Data Analysis
Day 14
2 Construction and Functional Validation of the pTBR2iB Plasmid
2025.03.22-2025.05.12
Strain Revival and Plasmid Extraction
Day 1-2
Heat Shock Transformation
Day 3-5
Colony PCR
Day 6-8
Growth Curve Assay
Day 9-12
Plasmid Construction Workflow
Day 13-16
Data Acquisition and Viable Plate Count
Day 17-20
Validation by Agar Diffusion Assay and spot plate assay
Day 21-23
Supplement
Supplement figure
3 Co-transformation of Constructed Plasmids and Vectors
2025.08.18-2025.08.24
Bacterial Culture
Day 1
Plasmid Extraction
Day 2
Colony PCR of double-plasmid strain identification
Day 3
Strain cryopreservation
Day 4
Co-transformation and Colony PCR identification
Day 5-7
4 Assessment of Biofilm Formation in Engineered Escherichia coli
2025.09.27-2025.09.29
Inoculation and Biofilm Formation
Day 1
Crystal Violet Staining
Day 2
Data Analysis
Day 3
5 Lambda RED Homologous Recombination-Mediated Knockout of thyA and dapA Genes in Escherichia coli
2025.08.14-2025.09.27
E. coli Genomic DNA Extraction and Transformation
Day 1
Colony PCR for E. coli(pKD46)
Day 2
PCR Amplification of Target Fragments
Day 3
Extract pKD46 plasmid
Day 4
Electroporation
Day 5
Transformation of pKD3 and pCP20
Day 6
Electroporation and plasmid extraction
Day 7
Picking Single Colonies and incubation
Day 8-9
PCR Amplification of Target Gene Flanking Regions
Day 10-11
Knockout Verification
Day 12
Attempts to Remove Chloramphenicol Resistance Cassette from ΔthyA Strain Using pCP20 and Repeated Attempts to Knockout dapA
Day 13-32
6 Cell Experiment
2025.09.26-2025.09.30
Bacterial Handling and cell culture
Day 1
Sample Collection and detection at 4h
Day 2
Sample Collection and detection at 22h
Day 3
IFN-β ELISA for Frozen Supernatants
Day 4
Data Processing
Day 5
Raw data of the Flow-Cytometric 4h
Raw data of the Flow-Cytometric
Raw data of the Flow-Cytometric 22h
Raw data of the Flow-Cytometric