Part:BBa_K2796028

Exosome booster

Considering that TIL cells can't secret enough exosomes under normal condition, we fuse three genes to increase the number of exosomes (Alenquer, 2015), thus increasing the transfer efficiency of exosomes.

Exosome booster refers to hSDC4-T2A-STEAP3-P2A-NadB.We identified STEAP3 (involved in exosomebiogenesis), syndecan-4(SDC4; supports budding of endosomal membranes to form multivesicular bodies), and a fragment of L-aspartate oxidase (NadB; possibly boosts cellular metabolism by tuning up the citric acid cycle) as potential synthetic exosome production boosters. Combined expression of these genes significantly increased exosome production.(Ryosuke Kojima et al. 2008)

They combine with each other to boost exosomal transfer efficiency：

In previous article, it use IRES (internal ribosome entry site,IRES) to connect three genes, we change it into linkers T2A and P2A to ensure proper expression of three genes. Then we use use reporter gene copGFP to manifest the expression of exosome booster with the promoter of 5-HRE-PminCMV. Here is the final device that we designed for this project.

It combines with exosome booster and miR attacker under control of induced promoter.More details and description you can obtain in our wiki!

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal BglII site found at 192
  Illegal BglII site found at 1777
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal AgeI site found at 2657
  Illegal AgeI site found at 3277
  
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Illegal SapI site found at 1367