Berkeley
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| - | We' | + | We've been working on addressable bacterial communication via conjugation. The message being transferred is a gene locked using the Isaacs, Collins et al. riboregulator, sent in a packet mobilized by F-plasmid conjugation. This mobilized plasmid is sent to cells in the vicinity upon induction of the pBadAraC-controlled TraJF conjugation regulatory protein, expression of which triggers a cascade that constructs and uses F-plasmid conjugation machinery to send the packet plasmid. The message can only be unlocked by cells containing a trans activating key which acts to unlock the hairpin formed over the RBS by the cis-repressed riboregulator, wherein addressability is achieved by varying a 5 nucleotide region shared by the locks and keys. Upon receipt of the packet plasmid, the recipient cell turns on its own RP2-based conjugation machinery to send a similar acknowledgement packet back to the original cell, containing a genetic message also locked and opened by a second addressed lock/key pair. |
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| + | We have used the lambda-red protocol to knock out the TraJ gene on the F plasmid so as to have total control over transfer via the pBadAraC promoter. Additionally, by knocking out the OriT nick region, we have marooned the F plasmid and its valuable transfer machinery in the original cell so as to ensure only the packet is being sent. | ||
Revision as of 23:49, 1 November 2005
Berkeley iGEM Team
Instructors:
Jay Keasling
Adam Arkin
Jonathan Goler
Justyn Jaworski
Members:
Michael Chen
Vlad Goldenberg
Stephen Handley
Melissa Li
Jonathan Sternberg
Jay Su
Eddie Wang
Gabriel Wu
"Relevant Papers"
"Addressable Bacterial Communication"
We've been working on addressable bacterial communication via conjugation. The message being transferred is a gene locked using the Isaacs, Collins et al. riboregulator, sent in a packet mobilized by F-plasmid conjugation. This mobilized plasmid is sent to cells in the vicinity upon induction of the pBadAraC-controlled TraJF conjugation regulatory protein, expression of which triggers a cascade that constructs and uses F-plasmid conjugation machinery to send the packet plasmid. The message can only be unlocked by cells containing a trans activating key which acts to unlock the hairpin formed over the RBS by the cis-repressed riboregulator, wherein addressability is achieved by varying a 5 nucleotide region shared by the locks and keys. Upon receipt of the packet plasmid, the recipient cell turns on its own RP2-based conjugation machinery to send a similar acknowledgement packet back to the original cell, containing a genetic message also locked and opened by a second addressed lock/key pair.
We have used the lambda-red protocol to knock out the TraJ gene on the F plasmid so as to have total control over transfer via the pBadAraC promoter. Additionally, by knocking out the OriT nick region, we have marooned the F plasmid and its valuable transfer machinery in the original cell so as to ensure only the packet is being sent.
