User:Amirah: Difference between revisions
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<td> Gene X | <td> Gene X | ||
</td><td> Gene X is completely located within Gene II, its RBC, promoter region and ORF.<br>I would hesistate to refactor this portion of the M13 genome because of the risk<br>of many complications. Moving Gene X would also cause the genome to grow a<br> considerable amount since it will have 2 copies of Gene X, its RBS, and promoter<br>(one active, one inactive). Also, going back to functionality. Both Gene II and Gene<br>X play a part in propagation of sDNA within the host cell, there functions must be closely linked considering the complete overlap of Gene X in Gene II. | </td><td> Gene X is completely located within Gene II, its RBC, promoter region and ORF.<br>I would hesistate to refactor this portion of the M13 genome because of the risk<br>of many complications. Moving Gene X would also cause the genome to grow a<br> considerable amount since it will have 2 copies of Gene X, its RBS, and promoter<br>(one active, one inactive). Also, going back to functionality. Both Gene II and Gene<br>X play a part in propagation of sDNA within the host cell, there functions must be<br>closely linked considering the complete overlap of Gene X in Gene II. | ||
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Revision as of 07:28, 27 February 2007
protein | function / re-engineering ideas |
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I | assembly : alter gene so that surface receptors are present on P1 so that it can determine the number of bacteria phages being secreted at a time. |
II | replication of DNA + strand : encode so that P2 can be switched on and off based on the environment which it's in, example: stops replication when in a certian concentration of Ca2+ |
III | phage tail protein (5 copies): possible mechanism for selectivity to only certain bacteria, dealing with P3 connectivity to the TolA protein on bacterial pilus. |
IV | assembly : [look into how P3/P6 cap put on] re-engineer so that multi-phage bacterial links are formed, which requires altering the mechanism of how P4 interacts with the P3/P6 cap with which the phage is secreted. |
V | binds ssDNA : alter interaction with P9/P7 so that a limited number of ssDNA maybe surrounded by P8 at a time. |
VI | phage tail protein (5 copies): re-engineering closely linked with that of Gene III. Alter it to assist with bacterial selectivity. |
VII | phage head protein (5 copies): alter gene so as to alter its confor- mation. A change in conformation can expand the different residues that can be attatched to its N-terminal portion. |
VIII | phage coat protein (2700 copies): alter genes so that the protein P8 has an affinity for certain residues or salts. This can vastly increase the function of m13 as a whole. It can be used to transport different things into bacteria. |
IX | phage head protein (5 copies): re-engineering closely linked to that of Gene VII. However, since 9 is located on the surface of m13, it can be altered so that it can express different reactive chains on the phage surface. |
X | DNA replication : since altering Gene X is synonymous with altering Gene II, I would leave it alone and concentrate more on changing the functionality of gene 2. This makes more sense since Gene II as a better defined function within m13. |
XI | assembly : functionality of 11 is closely linked to that of Gene 4 and Gene 1. Re-engineer so that it can assist with forming multi- phage chains, or so that it can assist with controlling replication. |
Diagnostic digest 1 | plasmid with insert | plasmid no insert |
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Enzyme(s) used | Zra1 | Zra1 |
Buffer used | NEBuffer 2 SEBuffer B | NEBuffer 2 SEBuffer B |
Temperature | 37 celsius | 37 celsius |
Predicted fragments | 8708 bp | none, circular DNA |
Diagnostic digest 2 | plasmid with insert | plasmid no insert |
Enzyme(s) used | BamHI | BamHI |
Buffer used | NEBuffer 2 | NEBuffer 2 |
Temperature | 37 celsius | 37 celsius |
Predicted fragments | none, circular DNA | 8669 bp |
Alteration | Method |
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Deleted Gene VII | assembly : point mutation on codon within the RBS of gene VII while still maintaining the same amino acid. |
Added dual restriction enzyme buffer region | Inserted BamHI and EagI restriction sites after the end of the Gene IX orf. |
Moved Gene VIII promoter | point mutation on codon within promoter region which is embedded in gene IX. acutal promotor is shifted after the buffer region. |
Moved Gene VIII RBS | point mutation on the initial RBS located within Gene IX. Then shifted un-mutated RBS after new promotor region. |
Removal of overlap between Gene IX and Gene VIII | Point mutation on start codon ATG to ATC which does not alter the amino acid. Start codon for Gene VIII orf then shifted to after the new RBS. |
Problematic Gene's | Reasoning |
Gene X | Gene X is completely located within Gene II, its RBC, promoter region and ORF. I would hesistate to refactor this portion of the M13 genome because of the risk of many complications. Moving Gene X would also cause the genome to grow a considerable amount since it will have 2 copies of Gene X, its RBS, and promoter (one active, one inactive). Also, going back to functionality. Both Gene II and Gene X play a part in propagation of sDNA within the host cell, there functions must be closely linked considering the complete overlap of Gene X in Gene II. |