Difference between revisions of "Part:BBa K1907000"
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<b>Previous use</b></p><p>
 
<b>Previous use</b></p><p>
 
The part has been expressed in S. cerevisiae strains W303α and SS328-leu, in the pRS415 plasmid under GPD1 and GAL1 promoters. During use, the part has not been used within the context of the BioBricks standard prefix and suffix; instead, the part has been directly flanked by SpeI and XhoI restriction sites (5’ and 3’, respectively), which were also used for cloning into the pRS415 plasmid. Expression results may vary when using the part in a different context; in particular, using the part in the context of the BioBricks prefix results in a T in the -3 position upstream of the start codon, which is strongly disfavored in eukaryotic transcription initiation (Kozak, 1996, Cavener et al., 1991).
 
The part has been expressed in S. cerevisiae strains W303α and SS328-leu, in the pRS415 plasmid under GPD1 and GAL1 promoters. During use, the part has not been used within the context of the BioBricks standard prefix and suffix; instead, the part has been directly flanked by SpeI and XhoI restriction sites (5’ and 3’, respectively), which were also used for cloning into the pRS415 plasmid. Expression results may vary when using the part in a different context; in particular, using the part in the context of the BioBricks prefix results in a T in the -3 position upstream of the start codon, which is strongly disfavored in eukaryotic transcription initiation (Kozak, 1996, Cavener et al., 1991).
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<p style="margin-left: 40px"><b>Expression</b></p><p>
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<b>Expression</b></p><p>
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When used in the pRS415 plasmid, the produced fluorescence is not visible by eye, but can be easily measured with e.g. a microplate reader.  Figure 1 presents the development of fluorescence under GPD1 and GAL1 promoters over time when a culture of starting OD=0.5 is grown at 30 C with linear shaking of 731 cpm. Galactose induction is performed at t = 0.
 
When used in the pRS415 plasmid, the produced fluorescence is not visible by eye, but can be easily measured with e.g. a microplate reader.  Figure 1 presents the development of fluorescence under GPD1 and GAL1 promoters over time when a culture of starting OD=0.5 is grown at 30 C with linear shaking of 731 cpm. Galactose induction is performed at t = 0.
  
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</p><p>Figure 1. Fluorescence of Venus YFP under GPD1 and GAL1 promoters in W303α. RFU is blanked value of fluorescence. Excitation wavelength 502 nm, emission wavelength 528 nm. </p>
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</p><p style="margin-left: 40px">Figure 1. Fluorescence of Venus YFP under GPD1 and GAL1 promoters in W303α. RFU is blanked value of fluorescence. Excitation wavelength 502 nm, emission wavelength 528 nm. </p>
 
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Revision as of 17:44, 19 October 2016


Venus Yellow Fluorescent Protein

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 644

</p>

Venus has an excitation wavelength of 515 nm and emission wavelength of 528 nm (Shaner et al., 2005). Venus has the advantage over many other YFPs of being less sensitive to environmental factors such as pH and chloride ions, and has a quicker rate of maturation (Nagai et al., 2002).

Previous use

The part has been expressed in S. cerevisiae strains W303α and SS328-leu, in the pRS415 plasmid under GPD1 and GAL1 promoters. During use, the part has not been used within the context of the BioBricks standard prefix and suffix; instead, the part has been directly flanked by SpeI and XhoI restriction sites (5’ and 3’, respectively), which were also used for cloning into the pRS415 plasmid. Expression results may vary when using the part in a different context; in particular, using the part in the context of the BioBricks prefix results in a T in the -3 position upstream of the start codon, which is strongly disfavored in eukaryotic transcription initiation (Kozak, 1996, Cavener et al., 1991).

Expression

When used in the pRS415 plasmid, the produced fluorescence is not visible by eye, but can be easily measured with e.g. a microplate reader. Figure 1 presents the development of fluorescence under GPD1 and GAL1 promoters over time when a culture of starting OD=0.5 is grown at 30 C with linear shaking of 731 cpm. Galactose induction is performed at t = 0.

Figure 1. Fluorescence of Venus YFP under GPD1 and GAL1 promoters in W303α. RFU is blanked value of fluorescence. Excitation wavelength 502 nm, emission wavelength 528 nm.

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References

Cavener, D.R., Ray, S.C, 1991. Eukaryotic start and stop translation sites. Nucleic Acids Research, 1991, 19(12), pp. 3185-3192

Kozak, M., 1996 Point mutations define a sequence flanking the AUG initiator codon that modulates translation by eukaryotic ribosomes. Cell, 44(2), pp. 283-292

Nagai, T., Ibata, K., Park, E.S., Kubota, M., Mikoshiba, K., Atsushi, M., 2002, A variant of yellow fluorescent protein with fast and efficient maturation for cell-biological applications, Nature Biotechnology, 20(1), pp. 87-90

Shaner, N.C., Steinbach, P.A. and Tsien, R.Y., 2005. A guide to choosing fluorescent proteins. Nature methods, 2(12), pp.905-909.