Difference between revisions of "Part:BBa K1223010"

Latest revision as of 13:48, 12 October 2013

pUC-57-P.A.S.E.1

pUC57 plasmid containing the P.A.S.E1 cassette between BamHI and XbaI restriction sites.

Design Notes

used for amplification and extraction of the P.A.S.E. 1 cassette. the P.A.S.E.1 cassette is cloned into the plasmid backbone using XbaI and BamHI restriction enzymes. we used this part to amplify and extract a large amounts of the P.A.S.E.1 cassette.

the pUC57 is used to overexpress recombinant proteins as well as amplify a gene of interest inside E.coli. the plasmid backbone contains ampicillin resistance gene (b-lactamase) for selection of transformants.

the P.A.S.E.1 cassette contains a toxin system based on phage lysis system of holin (BBa_K112805) and lysozyme (BBa_K112301). Holin protein causes "pores" in the inner membrane, which allows lysozyme to access and break down the peptidoglycan of the cell wall, causing lysis and eventually death. The toxins are regulated by cI regulated promoter (BBa_R0051). This part is designed to integrate into the cell's genome via homologous recombination and therefore it contains homologous regions at its ends. Kanamycin resistance was added for selectivity. Therefore, when transforming in bacteria only the cells that have gone through double recombination with the insert will survive.

The part was characterized through sequencing and restriction digest with BamHI and EcorRV.

lane1: undigested pUC57-P.A.S.E.1 cassette

lane2: pUC57-P.A.S.E.1 cassette digested with BamHI and EcorRV.

lane3: DS5000 Ladder

Source

part is synthetic. pUC57 backbone is a synthetic construct.

holin and lysozyme originates from T4 bacteriophage.

the homology regions were taken from E.coli BL21 genome

Usage and Biology

Sequence and Features