hisGFPmek and PDZ domain
description
Transcript of hisGFPmek and PDZ domain
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hisGFPmek and PDZ domainHis6 tag
(purification)Mek2 tag(PDZ binding)
*not to scale, at all
hisGFPmek protein
PDZ domain
E. coli
LppOmpA
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Initial cell binding assay
Ex 488, Em 507(published forEGFP clone)
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In vitro hisGFPmek bindingassay with GST-PDZ fusion protein
--GSH
Glutathione bead
GST(glutathione S-transferase)
PDZ
hisGFPmek
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In vitro hisGFPmek assay
Ex 485, Em 538(quorum-sensinggroup protocol)
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In vitro hisGFPmek assay
Ex 488, Em 507(published forEGFP clone)
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Rebuilding the Voigt construct
Voigt et al., 2006
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• Amplification by PCR, digestion/ligation of PCR’d fragments • Pros
– Faster, more processive protocol– No overnight liquid cultures or transformations (until the end)– No gel isolation, just PCR purification– No colony PCR– PCR is better amplifier than bacteria– Can reconstitute unavailable subparts
• Cons– Can’t save intermediate constructs (except by cloning PCR products
into Topo vector)– Requires primer design and synthesis– Problems with identical/homologous BioBrick parts
Alternative PCR/digest assembly
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Alternative PCR/digest assembly
BBa_J23039BBa_T9002
E X S P X S P VRE
BB_F
BBa_T9002
P VRE
VRE
SX
PSX
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BB_R as well as BB_F
P VRE SX
SE X P
BB_R
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Plans
• Explore AIDA construct– AIDA-streptavidin– AIDA-PDZ
• Make a new hisGFPmek?– Longer Mek tag, or longer linker
• Finish the Voigt construct by PCR/digest– Forever abandon traditional BioBricks protocol?
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Alternative PCR/digest assembly
BBa_T9002
P VRE
VRE
SX
PSX