Difference between revisions of "Part:BBa K1741011"

Latest revision as of 08:35, 27 September 2015

sfGFP under T7 promoter

This part imitates the most popular IPTG/lactose dependent T7 viral RNA polymerase driven expression systems. To express another sequence of interest sfGFP could be substituted using Gibson or CPEC assembly method. Host strain of choice expressing T7 RNA polymerase is necessary, not only DE3.

Results

We compared our promoters to T7 promoter on minimal M9 medium with added glucose.

The sfGFP fluorescence [RFU] was measured using Tecan fluorometer.

The expression rate under T7 promoter is high compared to other tested promoters even though there is no inducer (lactose) present in the medium (so it has a tendency to leak). Our promoters do not exhibit any significant expression.
Note that this comparison is simplified. Transcription from T7 promoter is performed by a strong viral polymerase while the transcription from our other promoters is performed by slower cellular RNA polymerase.

Sequence and Features

Assembly Compatibility:

10
INCOMPATIBLE WITH RFC[10]
Illegal XbaI site found at 48
12
COMPATIBLE WITH RFC[12]
21
COMPATIBLE WITH RFC[21]
23
INCOMPATIBLE WITH RFC[23]
Illegal XbaI site found at 48
25
INCOMPATIBLE WITH RFC[25]
Illegal XbaI site found at 48
1000
INCOMPATIBLE WITH RFC[1000]
Illegal SapI.rc site found at 131

Revision as of 08:34, 27 September 2015 (view source) Michal.michalak (Talk \| contribs) ← Older edit		Latest revision as of 08:35, 27 September 2015 (view source) Michal.michalak (Talk \| contribs)
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	The expression rate under T7 promoter is high compared to other tested promoters even though there is no inducer (lactose) present in the medium (so it has a tendency to leak). Our promoters do not exhibit any significant expression.		The expression rate under T7 promoter is high compared to other tested promoters even though there is no inducer (lactose) present in the medium (so it has a tendency to leak). Our promoters do not exhibit any significant expression.
−	Note that this comparison is simplified~~, because the transcription~~ from T7 promoter is performed by strong viral polymerase while the transcription from our other promoters is performed by slower cellular RNA polymerase.	+	<br>Note that this comparison is simplified. Transcription from T7 promoter is performed by a strong viral polymerase while the transcription from our other promoters is performed by slower cellular RNA polymerase.