IGEM:Imperial/2010/Output module

Effector 1 (Protease)	Effector 2 (Dye,Enz)	Pigment biosynthetic pathways
transcr sigma 54	2 colourless	Bilins
Activation (phosphorylation)	Enz-in-pathway short pathways ensure - colourless -> colour	Anthocyanins short pathways ensure - colourless -> colour
Target proteases to use not many AA non-toxic can work in E.Coli quantize speed, efficiency	Protein scaffold	Fret pairs as back up for effectors
2C DNA binding prot release

This review article has some useful information on FRET.

Our autoinhibitory coiled-coil output constructs

Taken and adapted from the JACS article 'An Autoinhibited Coiled-Coil Design Strategy for Split-Protein Protease Sensors' ref

The construct design is of the order:

A’-TEV-B-NFluc Cfluc-A-TEV-B‘2A

Where in our case NFluc and CFluc will be NBlactamase CBlactamase//split eGFP and split TEV itself. The 2A refers to a mutated variation of the original coil sequence (AQLKKKLQANKKELAQLKWKLQALKKKLAQ)which produced a better coil activity.

AQLEKELQALEKKLAQLEWENQALEKELAQ (A')

gcgcagctggaaaaagaactgcaggcgctggaaaaaaaactggcgcagctggaatgggaa aaccaggcgctggaaaaagaactggcgcag

AQAKKKAQANKKELAQLKWKLQALKKKLAQ (B'2A)

gcgcaggcgaaaaaaaaagcgcaggcgaacaaaaaagaactggcgcagctgaaatggaaa ctgcaggcgctgaaaaaaaaactggcgcag

Tobacco etch virus (TEV) protease-cleavable linker (GGGGENLYFQGGKLGGGG)was used.

ggcggcggcggcgaaaacctgtattttcagggcggcaaactgggcggcggcggc LINKER

Overall sequence for Coiled-coil construct

C-TERMINAL sGFP/sB-Lac -AQLEKELQALEKKLAQLEWENQALEKELAQGGGGENLYFQGGKLGGGGAQAKKKAQANKKELAQLKWKLQALKKKLAQ

gcgcagctggaaaaagaactgcaggcgctggaaaaaaaactggcgcagctggaatgggaa aaccaggcgctggaaaaagaactggcgcagggcggcggcggcgaaaacctgtattttcag ggcggcaaactgggcggcggcggcgcgcaggcgaaaaaaaaagcgcaggcgaacaaaaaa gaactggcgcagctgaaatggaaactgcaggcgctgaaaaaaaaactggcgcag

AQLEKELQALEKKLAQLEWENQALEKELAQGGGGENLYFQGGKLGGGGAQLKKKLQANKKELAQLKWKLQALKKKLAQ -N-TERMINAL sGFP/sB-Lac

gcgcagctggaaaaagaactgcaggcgctggaaaaaaaactggcgcagctggaatgggaa aaccaggcgctggaaaaagaactggcgcagggcggcggcggcgaaaacctgtattttcag ggcggcaaactgggcggcggcggcgcgcagctgaaaaaaaaactgcaggcgaacaaaaaa gaactggcgcagctgaaatggaaactgcaggcgctgaaaaaaaaactggcgcag

Beta-Lactamase construct

NβLac-A-TEV-B’4A βLactamase (26-196) TEV B-CβLac βLactamase (198-290)

fluorocilin green (Invitrogen) was used as the fluorescing substrate.

Superfolder split GFP

NOTE readily self assembles as does split Beta-galactosidase

'One fragment of the split GFP contains the first 214 residues of the exceptionally stable, fast-folding ‘‘superfolder’’ GFP protein (Pedelacq et al., 2006), further evolved to be stable as a protein fragment. This fragment includes ten of the eleven strands of the beta-barrel structure of GFP and will be called spGFP1-10. The second split-GFP fragment consists of just 16 residues, 215– 230, which make up the 11th strand of the GFP b-barrel. This second fragment, spGFP11, acts as a small protein tag that can be inserted into many different proteins without affecting their solubility' ref

Amino acid and sequence of the GFP 11 cassette:

SSLKRRKIPMGSSHHHHHHSSGLVPRGSHM*(frame shift +1)

• LIGSDGGSGGGSTSRDHMVLHEYVNAAGIT*GT*LEHHHHHH*DPAANKARKEAELAAATAEQ*LA*PLEA

DNA sequence of the GFP 11 cassette 0421007 TAGAGATACTGAGCACATCAGCAGGACGCACTGACCGAGTTCATTAAAGAGGAGAAAGATACCATGGGCAGCAGCCATCATCATCATCATCACAGCAGCGGCCTGGTGCCGCGCGGCAGCCATATGTAATTAATTAATTGGATCCGATGGAGGGTCTGGTGGCGGATCAACAAGTCGTGACCACATGGTCCTTCATGAGTACGTAAATGCTGCTGGGATTACATAAGGTACCTAACTCGAGCACCACCACCACCACCACTGAGATCCGGCTGCTAACAAAGCCCGAAAGGAAGCTGAGTTGGCTGCTGCCACCGCTGAGCAATAACTAGCATAACCTCTAGAGGCCTC 02129811

Amino acid sequence of the GFP 1-10 cassette DRDLDPAKLIRLTIHMGGTSMSKGEELFTGVVPILVELDGDVNGHKFSVRGEGEGDATIGKLTLKFICTTGKLPVPWPTLVTTLTYGVQCFSRYPDHMKRHDFFKSAMPEGYVQERTISFKDDGKYKTRAVVKFEGDTLVNRIELKGTDFKEDGNILGHKLEYNFNSHNVYITADKQKNGIKANFTVRHNVEDGSVQLADHYQQNTPIGDGPVLLPDNHYLSTQTVLSKDPNEK*GTLEHHHHHH*DPAANKARKEAELAAATAEQ*LA*PLEA

DNA sequence of the GFP 1-10 cassette 01079936 AGGATCGAGATCTCGATCCCGCGAAATTAATACGACTCACTATACATATGGGTGGCACTAGTATGAGCAAAGGAGAAGAACTTTTCACTGGAGTTGTCCCAATTCTTGTTGAATTAGATGGTGATGTTAATGGGCACAAATTTTCTGTCAGAGGAGAGGGTGAAGGTGATGCTACAATCGGAAAACTCACCCTTAAATTTATTTGCACTACTGGAAAACTACCTGTTCCATGGCCAACACTTGTCACTACTCTGACCTATGGTGTTCAATGCTTTTCCCGTTATCCGGATCACATGAAAAGGCATGACTTTTTCAAGAGTGCCATGCCCGAAGGTTATGTACAGGAACGCACTATATCTTTCAAAGATGACGGGAAATACAAGACGCGTGCTGTAGTCAAGTTTGAAGGTGATACCCTTGTTAATCGTATCGAGTTAAAGGGTACTGATTTTAAAGAAGATGGAAACATTCTCGGACACAAACTCGAGTACAACTTTAACTCACACAATGTATACATCACGGCAGACAAACAAAAGAATGGAATCAAAGCTAACTTCACAGTTCGCCACAACGTTGAAGATGGTTCCGTTCAACTAGCAGACCATTATCAACAAAATACTCCAATTGGCGATGGCCCTGTCCTTTTACCAGACAACCATTACCTGTCGACACAAACTGTCCTTTCGAAAGATCCCAACGAAAAGTAAGGTACCCTCGAGCACCACCACCACCACCACTGAGATCCGGCTGCTAACAAAGCCCGAAAGGAAGCTGAGTTGGCTGCTGCCACCGCTGAGCAATAACTAGCATAACCTCTAGAGGCCTC 02129811

Re-confirmed sequence for S219D TEV construct

Protein: GRSLFKGPRDYNPISSTICHLTNESDGHTTSLYGIGFGPFIITNKHLFRRNNGTLLVQSLHGVFKVKNTTTLQQHLIDGRDMIIIRMPKDFPPFPQKLKFREPQREERICLVTTNFQTKSMSSMVSDTSCTFPSSDGIFWKHWIQTKDGQCGSPLVSTRDGFIVGIHSASnftntnnyftSVPKNFMELLTNQEAQQWVSGWRLNADSVLWGGHKVFMDKPEEPFQPVKEATQLMN

Nucleotide: ggccgcagcctgtttaaaggcccgcgcgattataacccgattagcagcaccatttgccatctgaccaacgaaagcgatggccataccaccagcctgtatggcattggctttggcccgtttattattaccaacaaacatctgtttcgccgcaacaacggcaccctgctggtgcagagcctgcatggcgtgtttaaagtgaaaaacaccaccaccctgcagcagcatctgattgatggccgcgatatgattattattcgcatgccgaaagattttccgccgtttccgcagaaactgaaatttcgcgaaccgcagcgcgaagaacgcatttgcctggtgaccaccaactttcagaccaaaagcatgagcagcatggtgagcgataccagctgcacctttccgagcagcgatggcattttttggaaacattggattcagaccaaagatggccagtgcggcagcccgctggtgagcacccgcgatggctttattgtgggcattcatagcgcgagcaactttaccaacaccaacaactattttaccagcgtgccgaaaaactttatggaactgctgaccaaccaggaagcgcagcagtgggtgagcggctggcgcctgaacgcggatagcgtgctgtggggcggccataaagtgtttatggataaaccggaagaaccgtttcagccggtgaaagaagcgacccagctgatgaac

James- some suggested papers:

1. Kerppola TK. Complementary methods for studies of protein interactions in living cells. Nat Methods. 2006 Dec;3(12):969-71. DOI:10.1038/nmeth1206-969 |
2. Wehr MC, Laage R, Bolz U, Fischer TM, Grünewald S, Scheek S, Bach A, Nave KA, and Rossner MJ. Monitoring regulated protein-protein interactions using split TEV. Nat Methods. 2006 Dec;3(12):985-93. DOI:10.1038/nmeth967 |

GFP as output

EGFP

• In vivo and in vitro protein solubility assays using split GFP
• Monitoring of conformational change in maltose binding protein using split green fluorescent protein
• Protein Splicing-Based Reconstitution of Split Green Fluorescent Protein for Monitoring Protein−Protein Interactions in Bacteria: Improved Sensitivity and Reduced Screening Time
• A Fluorescent Indicator for Detecting Protein−Protein Interactions in Vivo Based on Protein Splicing