• Vanillin synthesis: DNA not yet complete/in library [http://partsregistry.org/wiki/index.php/Part:BBa_I742140]
  • Combination of 5 genes; 3 are available
    • Edinburgh Vanilla production (Pathway synthesis, Edinburgh iGEM 2007)
  • [http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=17437627#id538997 Vanillin production using metabolically engineered Escherichia coli under non-growing conditions], Ferulic accid --> Vanillin, 5k bp

• Biobricks for vanillin synthesis
  • Send mail to University of Tuscia [Done]
  • Order:
    • (sam8 (tyrosine-ammonia lyase) coding sequence) [ordered]
    • (sam5 (coumarate hydroxylase) coding sequence) [ordered]
    • (COMT gene with ribosome binding site) [Available in kit]

Extra info on vanillin synthesis

• http://www.ncbi.nlm.nih.gov/pubmed/16232583 1 B C Okeke and V Venturi ,Construction of recombinants Pseudomonas putida BO14 and Escherichia coli QEFCA8 for ferulic acid biotransformation to vanillin, J Biosci Bioeng. 1999; 88(1): 103–106.
  
• http://www.ncbi.nlm.nih.gov/pubmed/14602615 2 Jörg Overhage, Alexander Steinbüchel, and Horst Priefert,Highly Efficient Biotransformation of Eugenol to Ferulic Acid and Further Conversion to Vanillin in Recombinant Strains of Escherichia coli, Appl Environ Microbiol. 2003 November; 69(11): 6569–6576. doi: 10.1128/AEM.69.11.6569-6576.2003.
  
• http://www.ncbi.nlm.nih.gov/pubmed/10616715 3 J Overhage, H Priefert, J Rabenhorst, and A Steinbüchel,Biotransformation of eugenol to vanillin by a mutant of Pseudomonas sp. strain HR199 constructed by disruption of the vanillin dehydrogenase (vdh) gene, Appl Microbiol Biotechnol. 1999 November; 52(6): 820–828.
  
• http://www.labmeeting.com/paper/2776259/yoon-enhanced-vanillin-production-from-recombinant-e-coli-using-ntg-mutagenesis-and-adsorbent-resin 4 Yoon SH, Lee EG, Das A, Lee SH, Li C, Ryu HK, Choi MS, Seo WT, and Kim SW, Enhanced vanillin production from recombinant E. coli using NTG mutagenesis and adsorbent resin, Biotechnology progress 23(5):1143.
  
• http://www.scielo.br/scielo.php?pid=S1517-83822003000500037&script=sci_arttext 5 Attilio ConvertiI; Danilo de FaveriI; Patrizia PeregoI; Paolo BarghiniII; Maurizio RuzziII; Luciane SeneIII, Vanillin production by recombinant strains of Escherichia coli, Braz. J. Microbiol. vol.34 suppl.1 São Paulo Nov. 2003
  
• http://www.springerlink.com/content/bj47xnqn5kr65wvp/fulltext.pdf 6 S. Achterholt, H. Priefert, and A. Steinbüchel, Identification of Amycolatopsis sp. strain HR167 genes, involved in the bioconversion of ferulic acid to vanillin, Appl Microbiol Biotechnol. 2000 December; 54(6): 799–807
  

• Focus on the last two parts in the synthesis of vanillin since that pathway has been proven
  • Can always add additional 3 paths

• Send mail to U. Edinburgh for the proteins for vanillin synthesis [Done]
  • Received mail back from Edinburgh, biobricking of the parts should still be done. Will receive answer next week

Received mail from U. Edinburgh: We will receive:

• sam5; no part number, Pst1 site removed
• sam8; coding sequence without RBS
• COMT; coding sequence without RBS
• ech; RBS + ech, in ,
• fcs; RBS + fcs, in ,

• Modeling:
  • Searching for reaction kinetics parameters: degradation of enzymes.

Template:Team:KULeuven/28 July 2009/VanillinProduction

We received mail from Edinburgh today. The following plasmids have arrived:

• RBS + ech, in ,
• RBS + fcs, in ,

They were put in the freezer and will be incorporated into competent cells, so they can be multiplied and stored.

Following parts were put into competent cells by electroporation:

• RBS + ech, in ,
• RBS + fcs, in ,

The cells were then transferred to liquid LBmedium to recuperate from the procedure. After a few hours they were transferred to LB/amp plates and grown overnight at 37°C.

Template:Team:KULeuven/31 July 2009/VanillinProduction

We received the COMT, sam5 and sam8 from Edinburgh today. Unfortunately, the tube containing the sam5 + RBS (with the PstI site) was opened during transport and all DNA in it was lost. The others were transferred into competent cells by electroporation.

• sam5 + RBS in (with PstI site removed),
• sam8 + RBS in ,
• sam8 in coding sequence,
• COMT in coding sequence,

The cells were put into liquid LB to recuperate from the procedure, transferred onto LB/amp plates and grown overnight at 37°C.

We also made liquid cultures of the RBS + fcs and RBS + ech cultures so we can miniprep them tomorrow.

Liquid cultures were made out of the sam5, sam8 and COMT colonies grown overnight. They will be mini-prepped tomorrow to get the plasmid DNA out.

Plasmid DNA from the ech and fcs liquid cultures was isolated today. It yielded respectively 108,8 and 113,9 ng/µl.

Miniprep of pairs:

• RBS + sam5 conc: 101,3 ng/ul
• RBS + sam8 conc: 95.7 ng/ul
• sam8 conc: 81,8 ng/ul
• COMT , conc: 122,9 ng/ul

Restriction digestion
A1: sam8, EcoRI en SpeI
A2: sam5, EcoRI en XbaI

B1: RBS, EcoRI en SpeI
B2: COMT, EcoRI en XbaI

C1: fcs, EcoRI en SpeI
C2: ech, EcoRI en XbaI

The mixture was incubated in 37°C for 1h30...

...followed by gel electrophoresis of the digested parts

Today the purification of the gel electrophoresis was done on the cells from yesterday. Nanodrop concentrations:
A1, sam5: 11,6 ng/ul
A2, sam8: 5,5 ng/ul
B2, COMT: 24,3 ng/ul
C1, fcs: 16,6 ng/ul
C2, ech: 16,9 ng/ul

A1 and A2 showed a very low concentration and the 260/280 value was quite high so both were electrophoresed again. B1 (RBS) had failed because it was too short, however ligating B1 and B2 (COMT) was no longer needed since the part with RBS was available in the iGEM 2009 kit .

A1 and A2 were redigested:
A1: sam8, EcoRI en SpeI
A2: sam5, EcoRI en XbaI
followed by gel electrophoresis

Gel extraction of DNA from A1 (sam5) and A2 (sam8) Results of the nanodrop:

Part	concentration (ng/μl)	260/280 λ	260/230 λ
A1 (sam5)	3,4	1,80	0,01
A2 (sam8)	3,1	2,66	0,02

• COMT was grown
• sam5 and sam8 were ligated
• ech and fcs were ligated