Part:BBa_K3771079

T7-JJU

Description

P_T7-jju is a composite part consisting of the T7 promoter and the cs sequences. This part was used in in vivo testing of taurine production. The sequence for jju and T7 promoter were ligated and transformed into E. coli to calculate taurine production using high-performance liquid chromatography (HPLC).

Biology

T7 promoter constitutively facilitates the expression of JJU enzyme.

Fig. 1. Taurine pathways in E. coli

Usage

JJU enzyme was used in in vitro testing of taurine production. The sequence for JJU enzyme and trc promoter (BBa_K864400) were ligated and transformed into E. coli. By adding L-cysteine substrate into a reaction solution, JJU can help catalyze the conversion of L-cysteine to taurine. Taurine concentrations were determined using high-performance liquid chromatography (HPLC).

Characterization

Fig. 2. Confirmation of jju fragment by PCR. M: Marker; Lane 1: jju (1180bp)

Fig. 3. Confirmation of pET28a fragment by digestion. M: Marker; Lane 1: pET28a (~5280 bp)

Fig. 4. Transformation/JJU in DH5α

Fig. 5. Confirmation of pET28a-P_T7-jju by digestion. M: Marker; Lane 1: Colony of pET28a-P_T7-jju (~6466 bp)

Fig. 6. Transform into BL21(DE3)

Fig. 7. Confirmation of protein expression of JJU. M: Marker; Lane1: whole cell of JJU in BL21(DE3); Lane2: soluble protein of JJU in BL21(DE3) (~43 kDa)

Fig. 8. Transform into BD7G

Fig. 9. Confirmation of protein expression of JJU. M: Marker; Lane1: whole cell of JJU in BD7G; Lane2: soluble protein of JJU in BD7G(~43 kDa)

References
BRENDA - Information on EC 4.4.1.10 - cysteine lyase. Brenda-enzymes.org. Published 2021. Accessed October 6, 2021. https://www.brenda-enzymes.org/enzyme.php?ecno=4.4.1.10
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
  COMPATIBLE WITH RFC[1000]