Part:BBa_K1399011

Plac-RFP(LVA)

Lactose/IPTG inducible promoter with RBS, RFP reporter tagged with LVA-ssrA degradation tag and terminator. The tagged RFP is actively degraded within cell (Figure 1), thus provides better temporal resolution of red fluorescence and promoter activity. This part can be considered as improved version of Part:BBa_J04451 as it does not contain StuI restriction site coding for additional 'RP' residues between RFP and LVA tag.

Figure 1 SsrA degron mediated protein degradation. (A) Any version of SsrA tags can be attached to any protein of interest (e.g. RFP or GFP). (B) The tag is recognized by ClpX unfoldase forming a complex with ClpP protease and the tagged protein gets degraded.

Usage and Biology

[http://2017.igem.org/Team:Kingsborough_NY Team Kingsborough NY 2017] contributed to the characterization of this part by showing decreased fluorescence when expressed either in a higher salt media - such as LB with 3% sodium chloride - or E. coli that lacks tmRNA, the principal component of the cell's ribosome rescue system. Cells without tmRNA will have less native ssrA substrates, and this may lead to increased degradation of ssrA tagged RFP.
(--djcamenares 17:56, 27 October 2017 (UTC) )

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
  INCOMPATIBLE WITH RFC[25]

  Illegal AgeI site found at 781
  Illegal AgeI site found at 893
  
• 1000
  COMPATIBLE WITH RFC[1000]