Difference between revisions of "Part:BBa B0033"
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Group:iGEM2019_JiangnanU_China | Group:iGEM2019_JiangnanU_China | ||
| − | This year, we improved the sequence of the RBS BBa_B0033, and got the RBS | + | This year, we improved the sequence of the RBS <bbpart>BBa_B0033</bbpart>, and got the RBS <bbpart>BBa_K3137001</bbpart>. |
| − | [[ | + | [[Image:JiangnanUchina improve 1|center]] |
| − | As we all know, RBS refers to a sputum-rich untranslated region upstream of the initiation codon AUG. BBa_B0033 is a weaker RBS based on Ron Weiss thesis. Compared with BBa_B0030, BBa_B0031, BBa_B0032, BBa_B0034, | + | As we all know, RBS refers to a sputum-rich untranslated region upstream of the initiation codon AUG. <bbpart>BBa_B0033</bbpart> is a weaker RBS based on Ron Weiss thesis. Compared with <bbpart>BBa_B0030</bbpart>, <bbpart>BBa_B0031</bbpart>, <bbpart>BBa_B0032</bbpart>, <bbpart>BBa_B0034</bbpart>, <bbpart>BBa_B0033</bbpart> is weakest, and whose RBS strength is 0.35% of <bbpart>BBa_B0034</bbpart>. By analyzing their sequence, we found that <bbpart>BBa_B0033</bbpart> has fewer purines and no not have AAA sequence. SO we designed the RBS by adjusting the proportion of bases. |
| − | [[ | + | [[Image:JiangnanUchina improve 2|center]] |
| − | Then we ligated the two RBS with promotor rsmH (BBa_K3137000) and gene gfp (BBa_K3137011 ) and transform into E. coli BL21 to compare their green fluorescence. And take E. coli BL21 as a control. | + | Then we ligated the two RBS with promotor rsmH (<bbpart>BBa_K3137000</bbpart>) and gene gfp (<bbpart>BBa_K3137011</bbpart>) and transform into E. coli BL21 to compare their green fluorescence. And take E. coli BL21 as a control. |
The figure below shows that BBa_K3137001 has the stronger fluorescently protein expression than BBa_B0033, that means it’s efficient to increase the protein expression by increasing the number of purines in the RBS sequence, which is beneficial to the binding of ribosomes. | The figure below shows that BBa_K3137001 has the stronger fluorescently protein expression than BBa_B0033, that means it’s efficient to increase the protein expression by increasing the number of purines in the RBS sequence, which is beneficial to the binding of ribosomes. | ||
| − | [[ | + | [[Image:JiangnanUchina improve 3]] |
| − | [[ | + | [[Image:JiangnanUchina improve 4]] |
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Revision as of 15:18, 20 October 2019
RBS.4 (weaker) -- derivative of BBa_0030
Weaker RBS based on Ron Weiss thesis. Strengths relative to BBa_B0030, BBa_B0031, BBa_B0032.
Improvement
Group:iGEM2019_JiangnanU_China
This year, we improved the sequence of the RBS BBa_B0033, and got the RBS BBa_K3137001.
As we all know, RBS refers to a sputum-rich untranslated region upstream of the initiation codon AUG. BBa_B0033 is a weaker RBS based on Ron Weiss thesis. Compared with BBa_B0030, BBa_B0031, BBa_B0032, BBa_B0034, BBa_B0033 is weakest, and whose RBS strength is 0.35% of BBa_B0034. By analyzing their sequence, we found that BBa_B0033 has fewer purines and no not have AAA sequence. SO we designed the RBS by adjusting the proportion of bases.
Then we ligated the two RBS with promotor rsmH (BBa_K3137000) and gene gfp (BBa_K3137011) and transform into E. coli BL21 to compare their green fluorescence. And take E. coli BL21 as a control. The figure below shows that BBa_K3137001 has the stronger fluorescently protein expression than BBa_B0033, that means it’s efficient to increase the protein expression by increasing the number of purines in the RBS sequence, which is beneficial to the binding of ribosomes. File:JiangnanUchina improve 3 File:JiangnanUchina improve 4
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
Functional Parameters
| biology | -NA- |
| efficiency | 0.01 |
(Relative to BBa_B0034)