Difference between revisions of "Part:BBa K2728003"

Revision as of 04:12, 14 October 2018

NanoLuc

Basic Description

NanoLuc (Nluc) luciferase is a small enzyme (19.1kDa) engineered for optimal performance as a luminescent reporter. The enzyme is about 100-fold brighter than either firefly (Photinus pyralis) or Renilla reniformis luciferase using a novel substrate, furimazine, to produce high intensity, glow-type luminescence. The luminescent reaction is ATP-independent and designed to suppress background luminescence for maximal assay sensitivity.

Sequence and Features

NanoLuc luciferase possesses a number of physical properties that make it an excellent reporter protein:

• very small, monomeric enzyme (171 amino acids; 513bp)
• high thermal stability (Tm = 60°C)
• active over a broad pH range (pH 6–8)
• no post-translational modifications or disulfide bonds
• uniform distribution in cells
• emission spectrum well suited for bioluminescence resonance energy transfer (BRET; λmax = 465nM)

Origin

Nanoluc luciferase is a commercial product from PROMEGA without the information of its origin organism.

Experimental Characterization

We used the original plasmid provided by Promega to verify its luminescence strength. We transferred the plasmid into E. coli BL21 strain, a common bacterial strain for protein expression. 200 μl of the overnight bacteria was added into the 96-well plate for the luminescence assay. The luminescence curve was tested under the condition of emission wavelength=465nM and orbital shaking with amplitude=2. We can observed from the result that

Potential Application

The nanoluc luciferase can be used as a reporter of formaldehyde. We can calculate the formaldehyde concentration according to the strength of luminescence and the model of luminescence-formaldehyde concentration. What’s more, it can be used in the product so that customers can judge the existence of formaldehyde by observing the luminescence.

References

Goyet, E., et al., Fast and high resolution single-cell BRET imaging. Sci Rep, 2016. 6: p. 28231.

Sequence and Features