Team:Freiburg Bioware/testpage

• Materials

Results of agarose-gel:

• Expected fragments of 3677 bp and 974 bp can be cerified. The insertion of the RFC25_MCS has been inserted.
  
For further verification the insert has to be sequenced has to be conducted (to do for 04.06.2010).

Picking clones of Thymindinkinase of Amor

• • 5 clones of the XL-1 Blue colonies containing the plasmid pUB6/HV5/His6 with the thymidinkinase have been picked from LBamp-agarplates
  • 1 clone of the XL-1 Blue colonies containing the plasmid pUB6/HV5/His6 without the thymidinkinase (control) has been picked from LBamp-agarplates
  • all clones have been inoculated in 10 mL LB containing 10 µL Amp. Incubation: 37°C over-night.
  • to do: Mini-Prep of pUB6/HV5/His6 with the thymidinkinase and pUB6/HV5/His6 without the thymidinkinase (control)

Idea

• Insertion of Kozak consensus sequence before MCS to enhance gene expression (cloning consideration in Stratagene manual)
  • New RFC standard with Kozak sequence for eucaryotes??

21. Labortag 04.06.2010: DKFZ plasmid Retrafos, TK/GMK Mini-Prep

Investigators: Adrian, Bea, Chris W., Hanna


DKFZ

Comments: Plasmids of PD Kleinschmidt of the DKFZ arrived. The DNA was dried on a whatman paper.
Plasmids received:


• pXX6 alle Adenovirus Helfer Gene ohne AAV Gene; Plasmid von J. Samulski; evtl. Anfragen für Benutzererlaubnis
• pKEX-2XL.Rep40 Expressionsplasmide für das Rep Proteine 40
• pKEX-2XL.Rep 52 Expressionsplasmide für das Rep Proteine 52
• pKEX-2XL.Rep 68 Expressionsplasmide für das Rep Proteine 68
• pKEX-2XL.Rep 78 Expressionsplasmide für das Rep Proteine 78
• pCMV-VP(HS) Expressionsplasmid der drei VP Proteine in Kombination (assemly kompetent
• pKEX-VP1 Expressionsplasmide für die einzelnen VP (cap) Proteine (VP1, VP2 und VP3) vorsicht: sind alleine nicht assembly kompetent; Ruffing et al 1992; Steinbach et al. 1997;
• pKEX-VP2Expressionsplasmide für die einzelnen VP (cap) Proteine (VP1, VP2 und VP3) vorsicht: sind alleine nicht assembly kompetent; Ruffing et al 1992; Steinbach et al. 1997;
• pKEX-VP3Expressionsplasmide für die einzelnen VP (cap) Proteine (VP1, VP2 und VP3) vorsicht: sind alleine nicht assembly kompetent; Ruffing et al 1992; Steinbach et al. 1997;
• pTRUF_CMV_eGFPEinzelstrang Vektor zur Expression von eGFP
• dsAAV_CMV_eGFP"self complementary" Expressionsvektor von X. Xiao; evtl. anfragen wegen Benutzererlaubnis
• pTAV2 (gesamtes AAV Genom im "blue script" Vektor)
• pDG komplettes Helferplasmid zur Vektorherstellung; Grimm et al. 1998




• In order to obtain the DNA following steps have been performed:
  • cut out the spot where the DNA is spotted with a clean scalpel (note: scalpel should not have any contamination).
  • put a 0,5 mL Eppi in a 1,5 mL Eppi. Put little holes in the smaller eppi.
  • transfer Whatman paper into Eppi
  • add 50 µL TE-EF (Redissolving buffer) to whatman paper and wait 15 minutes
  • centrifuge eppis at 2000 rpm, 10 minutes
• Transformation with obtained plasmids was performed.

Fusion Enzyme: Thymidinkinase/Guanylate Kinase (TK/GMK)

Plasmid Mini-Prep

• experiment date: 04.06.2010 ; time: 3,5h
• name of investigator: Adrian, Bea, ChrisW.,Hanna
• new vector name: pUB_V5_His6 + TK/GMK (fusionenzyme)

Glycerol Stocks

Given Plasmid-Number

Nanodrop concentration

• Plasmid
  • Given Plasmid-Number: P15; DNA concentration: 493,7 ng/µL ;
  • Given Plasmid-Number: P16; DNA concentration: 464,4 ng/µL;
  • Given Plasmid-Number: P17; DNA concentration: 445,6 ng/µL;
  • Given Plasmid-Number: P18; DNA concentration: 562,9 ng/µL;
  • Given Plasmid-Number: P19; DNA concentration: 528,1 ng/µL;
  • Given Plasmid-Number: P20; DNA concentration: 499,9 ng/µL;

Comments:A Plasmid-Mini Prep with the received Fusionenzyme Thymidinkinase/Guanylate Kinase (TK/GMK)from Amor has been performed.
The DNA will be sent to GATC for sequencing.

• pUB6_V5_His6 - clone 1 (P15) (3 µL added to 27µL H20) has been sent to GATC.
• Expected results: Saturday

22. Labortag 05.06.2010: Insertion of iGEM expression parts into pAAV_MCS

Investigators: Adrian, Bea, Melanie, Hanna

Hybridization:

• Hybridization of received oligos: iGEM expression parts (RFC25 without EcoRI, NotI)
• Prior to opening the tubes, they were centrifugated at 13.000 rpm for 30 sec.
  • expression part MCS_for (charge-no: ST00114065): 108 µL Millipore H₂O (Volume on obtained sheet)were added.
  • expression part MCS_for (charge-no: ST00114066): 165 µL Millipore H₂O (Volume on obtained sheet)were added.
• Resuspended DNA was vortexted.
• Aliquots of both Oligos (1:10) were prepared: 10 µL Oligo + 90 µL H₂O (final volume usually 100 µl).
• Mix together(into PCR-tube):

• Program: ORIGAMI 1 modified for long oligos:
  • 1 99°C 7’
  • 2 99°C 1’
  • -1°C R=0.3 °/s
  • Goto 2 rep 74
  • Hold 4°C

• While hybridization of oligos was performed, digestion of pAAV_MCS vector was conducted
  

following standard protocol for cloning.

Digestion:

• Title: Ligation iGEM expression parts (="iGEM-MCS") with pAAV_MCS
• Plasmid: pAAV_MCS
• Buffer used: 3
• BSA: Yes
• DNA-Concentration: 260 ng/uL
• Restriction-enzyms used:

Enzyme1 (Nr. Lab: 152): ClaI Enzyme2 (Nr. Lab: 15): BglII

• Digestion components :

• Mixture was incubated for 1,5 h at 37°C.

Agarose-Gel:

• 1% agarose gel was prepared, gel ran for 45 minutes(110 V)

• Amount of loading dye added

• Expected size of fragments

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Gelextraction:

Gel measurement:

• Gelextraction was performed following standard protocol.
• DNA-concentrations were meassured: pAAV_MCS 18.2 ng/µL, Oligos: 136.7 ng/µL -> 1:10 dilution was prepared: 13.67 ng/µL

Ligation:

Trafo was performed (using XL1B cells) following standard protocol.

23. Labortag 07.06.2010: Mini-Preps (Kleinschmidt-plasmids and pAAV_iGEM-MCS)

investigators: Achim, Kira,Jessy, Chris W., Hanna, Adrian, Bea

pAAV_iGEM-MCS

Plasmid Mini-Prep

• experiment date:07.06.2010; time: whole day
• name of investigator: Achim, Kira,Jessy, Chris W., Hanna, Adrian, Bea

Glycerol Stocks

Given Plasmid-Number

Test digestion

• buffer used: 4 ; Restriction-enzymes used: Enzyme 1 (no. Lab:___) AgeI ; Enzyme 2 (no.Lab:___) NdeI
• Plasmid
  • Given Plasmid-Number: P34.2; DNA concentration: 433.78 ng/µL ;
  • Given Plasmid-Number: P34.3; DNA concentration: 408.48 ng/µL ;
  • Given Plasmid-Number: P34.4; DNA concentration: 409.80 ng/µL ;

Comments:Clone no.1 was dismissed...

Test digestion:

• Incubation: 45 min, 37°C

Agarose-Gel:

0.5 g Agarose, 50 ml TAE (1%), 3 µL GELRED (3-6µl), at 110 Volt, running time: 45 minutes

• Marker: GeneRuler ladder mix

Kleinschmidt-plasmids

Plasmid Mini-Prep

• experiment date: 07.06.2010 ; time: 10 – 20 h
• name of investigator: Kira, Achim, Jessy, Bea, Adrian, Hanna
• Kleinschmidt-plasmids

Glycerol Stocks

Given Plasmid-Number

Comments: Many things went wrong today!

• Glycerol stocks must be vortexted!
• Check mini-prep buffers - especially buffer PE (needs to contain ethanol!)
• Always check volumes - try to estimate if volume makes sense (check pipettes!)
• Don't discard bacteria cultures until glycerol stocks and mini-preps are successfully done!!!

Today's conclusion: Better ask 2 times than do something wrong without asking!!!

Site-directed mutagenesis of pAAV_iGEM-MCS (PstI)

Quickchange site directed mutagenesis: PCR reaction:

• 2.5 µL 10x Pfu Ultra II buffer
• 0.5 µL template (therefore the a 1:20 dilution of the pAAV_iGEM-MCS (433 ng/µL) was prepared) = 10.825 ng
• 0.56 µL primer 1 (of 1:10 dilution)
• 0.56 µL primer 2 (of 1:10 dilution)
• 1 µL DMSO (primers form very strong secondary structures)
• 0.5 µL dNTP
• 18.88 µL dH₂O
• 0.5 µL PfuUltra II fusion (1.25 U)

-> end volume: 25 µL

PCR program:
1 x : 2' 95°C (HotStart polymerase) 20 x : 30 s 95°C -> 1' 55°C -> 5' 68°C 1 x : 4°C (over night)
Experiment will be continued tomorrow.

24. Labortag 08.06.2010: Cloning of mVenus_YFP into pAAV_iGEM-MCS, continuation of site-directed mutagenesis

Investigators: Kira, Jessy, Hanna, Achim

Analysis of iGEM-MCS sequence (RFC25 without EcoRI and NotI):

The alignment with the theoretical pAAV_iGEM-MCS delivered a "C-deletion" within the NgoMIV restriction site. Due to that the pAAV_iGEM-MCS lacks this site. We controlled the bill of delivery and noted that the deletion must be GATC's fault. All in all this doesn't matter, because parts which are in iGEM standard can be inserted and therefore they will deliver the lacking NgoMIV restriction site. Further on this could be an advantage because after digestion the fragment which is cut out can be better detected in the gel.

Insertion of mVenus_YFP into pAAV_iGEM-MCS

Digestion:

• Vector: 4,16 µl
• Insert: 4,84 µl

• Vector: 6 µl
• Insert: 3 µl

continuation of site-directed mutagenesis

Digestion with DpnI:

Trafo:

25. Labortag 09.06.2010: pAAV_iGEM-MCS_mVenus-YFP, site-directed mutagenesis

investigators: Jessy, Achim, Sven, Toby, Hanna

No pAAV_iGEM-MCS_w/oPstI transformed bacteria (site-directed mutagensis) grew on the ampicillin agar plates over night!

Further on the cloning of mVenus-YFP into pAAV_iGEM-MCS seemed to fail:

Insertion of mVenus_YFP into pAAV_iGEM-MCS

• experiment date: 9.6.2010
• name of investigator: Sven
• plasmid:
  • Vector: name: pAAV_iGEM-MCS number: 34.2 production date: 5.6.2010
  • Insert: name: pOG14_mVenus number: - production date: ____ origin: Sven :)
• new vector name: pAAV_iGEM-MCS_mVenus-YFP
• buffer used: NEB4 ; Restriction-enzymes used: Enzyme 1 (no. Lab:___) AgeI ; Enzyme 2 (no.Lab:___) XbaI
• DNA concentration (vector): 433 ng/µL ; DNA concentration (insert): 530 ng/µL

Digestion

Agarose-Gel:

0.5 g Agarose, 50 ml TAE (1 %), 3 µL GELRED (3-6µl), at 115 Volt

Gelextraction

• insert (mVenus-YFP): 26 ng/µL
• vector (pAAV_iGEM-MCS): 30 ng/µL

Ligation

• vector: 5.85 µL
• insert: 3.15 µL
• ligase: 1 µL
• buffer: 10 µL

Test digestion of pAAV_iGEM-MCS

p style="font-size:15px; font-weight: bold; color: blue;">Test digestion</p>

• buffer used: 1 ; Restriction-enzymes used: Enzyme 1 (no. Lab:___) NgoMIV
• Plasmid
  • Given Plasmid-Number: P34.2 ; DNA concentration: 433.78 ng/µL;
  • Given Plasmid-Number: P34.3 ; DNA concentration: 408.48 ng/µL;
  • Given Plasmid-Number: P34.4 ; DNA concentration: 409.8 ng/µL;

• Incubation: 1 h, 37°C

Agarose-Gel:

0.5 g Agarose, 50 ml TAE (1 %), 3 µL GELRED, at 115 Volt, running time: 45 minutes + 20 minutes

• Marker: GeneRuler ladder mix

Comments: Digestion of P34.2 delivered just one fragment size, revealing that - as expected after sequencing (C-deletion: no NgoMIV site in iGEM-MCS) - there was just one NgoMIV restriction site in the vector. In contrast to that the digestion of P34.3 and P34.4 delivered two bands - whereas the band of the smaller fragments looked like a smier. Because of this obscure and non-satisfying results (besides our assumption that there's something wrong with the marker :) )we decided to sequence the P34.3 vector:

• c(P34.3): 408.48 ng/µL
• Volume (plasmid): 5.14 µL
• Volume (vector): 24.86 µL
• Name of eppi: HW_34
• Primer: GATC_std_pTeSp-1

Picking of Clones from pAAV_iGEM-MCS_mVenus-YFP_Vektor_oben

• experiment date: 9.6.2010
• name of investigator: Hanna, Achim
• plasmid:
  • Vector: name: pAAV_iGEM-MCS_Vektor_oben
  • Insert: name: pOG14_mVenus
• new vector name: pAAV_iGEM-MCS_mVenus-YFP_Vektor_oben

The Clones were picked and incubated in 10 mL LB-Medium containing 10µL ampicillin over night at 37°C on a rotary shaker.

26. Labortag 10.06.2010:

Site-directed mutagenesis of PstI in ITRs

1. Site directed mutagenisis

• Aim: deletion of PstI from both ITR's
• 2 PCR tubes got prepared, one for the left ITR and one for the right. (The SDM was performed according to the standart protocol)
• Media:Freiburg10_Site_directed_Mutagenesis_pAAV_MCS_deletion_PstI.pdf‎

Mini-Prep of pAAV_iGEM_Venus_YFP and test digestion

2.1 Mini-Prep of pAAV_iGEM_mVenus_YFP

Title: pAAV_iGEM_mVenus_
investigator: Jessy, Achim
Glycerol Stocks

Given Plasmid-Number

Title: pAAV_iGEM_mVenus_YFP (guided by Sven)
investigator: Bea Glycerol Stocks

Given Plasmid-Number

2.2 Test digestion

• buffer used: 4 ; Restriction-enzymes used: Enzyme XbaI (no. Lab:___) ; Enzyme AgeI (no.Lab:___) ____
• Plasmid
  • Given Plasmid-Number: P37; DNA concentration: 114,8 ng/µL ;
  • Given Plasmid-Number: P38 ; DNA concentration: 179,8 ng/µL;
  • Given Plasmid-Number: P39 ; DNA concentration: 180,8ng/µL ;
  • Given Plasmid-Number: P40; DNA concentration: 189,2 ng/µL;

Comments: Clones were picked from trafo-plate in the morning and mini-prep was performed in the late afternoon. Due to this and the fact that bacterial strain was BL-21, DNA-concentrations are quite low.

Investigators: Bea, Chris W.

• Incubation: 45 min, 37°C

27. Labortag 11.06.2010:

Site directed mutagenisis

transformation
transformation was performed according to the standard protocol Media:Freiburg10_Cloning Protocol.pdf
Cells were plated on agar plates (2x 1:100; 2x pellet)containing ampicillin and stored over night at 37°C.

Sequenzing

p39 was send to GATC for sequenzing

• p39: 180,83 ng*µl^-1
• volume plasmid: 8,3 µl
• volume water: 21,7 µl
• primer: GATC_std_pTeSp-1

28. Labortag 12.06.2010:

Kira
The plates were stored in the iGEM shelf @ 4 °C. Even if the transformation was not very successfull, some colonies can be picked and inoculated either tomorrow or on Monday. Note: Site-directed mutagenesis does not generate lots of intact plasmids, so few colonies are normal!! (Tobias)

29. Labortag 13.06.2010:

Jessy, Patrick, Hanna
We weren't able to detect any colonies on the plates - just a few air bubbles :) To be entirely sure, we put them back into the 37°C room over night.

30. Labortag 14.06.2010:

pAAV_iGEM-mVenus-YFP:

The sequencing data of pAAV_iGEM_mVenus-YFP was analyzed. The alignment with the "theoretical" pAAV_iGEM_mVenus-YFP showed that we successfully inserted mVenus-YFP into pAAV_iGEM-MCS.

Site-directed mutagenesis:

Also today no colonies were detectable on any plates!

TK-GMK-Plasmid

Adrian, Hanna
puB6_V5_His6_clone1 + TK/GMK (P15) will be sequenced again:

• name: AF 1
• primer: GATC_std_BGH-reverse
• volume(plasmid) = 4.25 µL
• volume (H₂O) = 25.75 µL

Results (15.06.): Unfortunately just ~ 300 bp were sequenced.

To do: Therefore more primers have to be designed in order to sequence the whole ~2000 bp TK-GMK fusion construct!

Zellkultur

AAV 293 and HT1080 Cells have been splitted and plated out on 10 cm dishes for transfektion. The Cells were accounted by using the Neubauer-Meteringchamber. After harvesting by following the standard protocol the pallet have been resuspendiated in 15ml of DTT medium. 2,5µl of this cell suspension have been mixed with 47.5µl of trypan blue.

We counted 12,5x 10^6 cells/ml for the T293 AAV cell line and 10x10^6 cells /ml for the HT1080 cell line.

The AAV 293 cells have been plated out on four dishes with 250µl of the cell suspension, on one plated with 1ml and on another dish with 1.5ml. note that that the date is wrong on the plates and the flasks! Cells have been already plated out on the 14th. of June.

We also seated two flasks one for each cell line. Therefor we used 1ml of the HT1080 cell suspension and two ml of the the AAV293 cells.

31. Labortag 15.06.2010:

Adrian, Achim, Chris W., Hanna

Solutions for transfection were prepared:

• 1 x TE-Buffer: 1.2114 g TRIS, 0.2 mL EDTA, 81 mL milipore-H₂O were mixed. pH was adjusted with HCl (1M and 5M) to 7.50. Volume was adjusted to 100 mL with milipore-H₂O. Solution was autoclaved (sterilization by filtration is also possible).
  
• 1 M CaCl2: 147.02 g CaCl2 x 2H₂O (M = 147.02 g/mol) was solved in 1 Liter H₂O and sterilized by filtration.
  
• 2 x HBS: 0.027 g Na2HPO4, 1.636 g NaCl, 1.19155 g HEPES were dissolved in ~ 30 mL milipore-H₂O. pH was adjusted to 7.10. Volume was adjusted to 100 mL and sterilized by filtration.
  

32. Labortag 16.06.2010:

Sponsoring:

Anna, Kerstin, Anissa
Sponsoring letters were examined and modified one more time.

Sequencing of TK-GMK:

Hanna
Two primers were designed and ordered from Sigma-Aldrich. Probably we will receive them on Friday.

Mega primer PCR:

Bea, Hanna

33. Labortag 17.06.2010:

Primer designing: VP1 primer for pKEX forward/reverse

Investigator: Volker
The construnts that we receieved from PD Dr. Kleinschmidt (DKFZ) are mainly in the pKEX backbone. The sequences of the backbone and the inserts are not availible, for this reason we decided to sequence the constructs. The first step is to sequence from one construct into the backbone. In the second step we will designe primers that bind in the backbone and point into the direction of the insert. These primers will then be used to sequence the inserts of all the constructs.

Forward primer pKEX in VP1 from bp 4124 to 414

• VP1 primer for pKEX forward: 5' - CAACAAGTCTGTTAATGTGGAC - 3' 22bp; TM: 50°C; CG% 41%

Reverse primer pKEX in VP1 from bp 2081 to 2100

• VP1 primer for pKEX reverse: 5' - GTGGGCCAGGTTTGAGCTTC - 3' 20bp; TM: 54°C CG%: 60%

The amplicon that should be produced by the primers is 199 bp long.

Primer designing: CMV_forward/reverse_qPCR

Investigator: Volker
Primers for the titering of the CMV region from the literature [Rohr et al., 2002] and [Rohr et al., 2005] were compared and analysed. The sequences from 2002 showed a differce in one nucleotide compared to the other primer and to our sequence. For this reason the second set [Rohr et al., 2005] was ordered.

• CMV_forward_qPCR: 5' - GGGACTTTCCTACTTGGCA - 3'
• CMV_reverse_qPCR: 5' - GGCGGAGTTGTTACGACA - 3'

Obtaining fragments by digestion with AlwNI. Fragments contain left and right ITR respectively

These primers will be used in a quantitative PCR assay with Sybr-green to measure the genomic titer and the infectious titer of the viral particles we will produce in the future.

Ordering of required reagents:

Investigator: Volker

• Nuclease S1 was ordered from Promega (10000Units for 36,00€)
• Proteinase K was ordered from Sigma (5mg for 31,30€; BioUltra, ≥30 units/mg protein, lyophilized powder)

These reagents are required for the procedure to determine the genomic and the infectious titer.

34. Labortag 18.06.2010: Transfection

Transfection

Transfection via calcium phosphat with the prepared solutions (31. Labortag 15.06.2010)

investigators: Chris W., Hanna, Patrick, Adrian, Volker
Transfections with the following plasmids:

1)

• pAAV_iGEM_mVenus_YFP (glycerol stock B34, P39) P39 has the correct sequence (confirmed)
• pHelper
• pAAV_RC

2)

• pAAV_iGEM_mVenus_YFP (glycerol stock B33, P38) P38 (we dont know if P39 has the correct sequence!)was used because the amount of P39 was not sufficient enough for four Transfections!
• pHelper
• pAAV_RC

Plasmid concentrations:
pAAV_RC: 1 µg/µl
pHelper: 280 ng/µl
pAAV_iGEM_mVenus_YFP, P39: 180,83 ng/µl
pAAV_iGEM_mVenus_YFP, P38: 179,75 ng/µl

Cellculture clone 1 and 2 were transfected with P39. Cellculture clone 3 and 4 were transfected with P38.

Deviations from the standard protocol (currently incomplete): We could only pipet 3,3 µg (instead of 10 µg) from each of the 3 plasmids into the 15 ml falcons due to insufficient amount of plasmid.

Adrian tried to examine the precipation of the CaCl2+ DNA Clusters. We have to optimize the pH of our 2xHBS at the moment it is 11.12

Theoretical: Digestion of pAAV_MCS for PCR to design ITR BioBrick

investigator: Bea
idea:

• Digest vector in order to obtain two fragments which contain the left and the right ITR respectively.
• Separation (Agarose-gel) and gel extraction of fragments
• Perform PCR with iGEM-Primers (forward primer contains EcoRI and Xbai; reverse primer contains SpeI and PstI)
• to do:
• design primers
• digestion of pAAV_MCS etc.

Theoretical: Digestion of pAAV_MCS with AlwNI produces two fragments which can be separated by agaorse gel.

Obtaining fragments by digestion with AlwNI. Fragments contain left and right ITR respectively

35. Labortag 19.06.2010: Literature seminar

Investigators: Bea, Hanna, Melanie, Denis, Volker, Christian W., Adrian and Achim

Topics:

• The ITRs
• The Cap

36.Labortag 20.06.2010: Picking clones of sequenced pAAV_igEM_mVenus_YFP

Investigators: Bea and Chris W

• Incoluate 250 mL DYT medium (add 250µL ampiciliin) with B34 (glycerol stock: BL-21 E.coli cells with P39 plasmid: pAAV-iGEM_mVenus_YFP
• Incubate on rotary shaker over-night (o/n) at 37°C
• to do: perform Midi-Prep tomorrow (21.06.2010)

37.Labortag 21.06.2010: Second Transfection, Transduction

2x HBS was steril filtrated into two 50 ml flacons. The falcons were put into the cellculture fridge.

New medium is prepared:

DMEM-Medium

• 500ml DMEM with Glutamax
• 10% FCS (50 ml)
• 5 ml 100x Pen/Strep
• 5 ml 100x NaPyruvat

H-DMEM-Medium

• 400 ml DMEM with Glutamax
• 90 ml FCS
• 5 ml 100x Pen/Strep
• 5 ml 100x NaPyruvat

Investigators: Patrick, Johannes

Feching dry ice for the experiments

Volker

Dry ice can be fetched from the department for macromolecular chemistry. The chemical depot is located in the second basement. The dry ice can be retrieved from monday to friday from 11:00 to 11:30 and from 14:15 to 14:30. The requestforms for this institute can be found in the iGEM folder and should be filled out, signed by an advisor and taken to the chemical depot. A styrofoam container is required for the transport.

Annotation of the BRs and the PLA2 domains

Volker
The Bacis Regions which are important for the nuclear localisation were annotated in the protein sequences of VP 1-3 according to: [Grieger et al, 2006]

Endotoxin-free Midi-Prep of pAAV_iGEM_mVenus-YFP

Chris W., Hanna (guided by Sven)
Midi-Prep was performed following standard protocol: File:Freiburg10 Endotoxinfreie Midi.pdf
DNA concenration was measured: 507 ng/µL
Plasmid was further used for a...

... Second Transfection

Six transfections were performed according to the standart protocol: Media:Freiburg10_Transfection_protocoll.pdf
Three 10 cm cellcluture dishes with 293 cells were transfected with 10 µg DNA (3,33 µg each plasmid) and the other three 10 cm cellculture dishes with 30 µg DNA (10 µg DNA each plasmid).

Plasmids:

• pAAV_iGEM-MCS_mVenus (P41), 507 ng/µl
• pAAV_RC , 1000 ng/µl
• pHelper , 280 ng/µl

Investigators: Patrick, Johannes

Preparing Viral Stocks

... according to the standart protocol (see AAV Helper-free System manual). No dilution was performed.

Investigators: Johannes, Patrick

HT1080 Transduction

Four 10 cm cellculture dishes with HT1080 cells have been provided for the transduction.

• 1 ml of the AAV-2-mVenus (derived from P 39) was pipeted to into dish 1. Note: the virus solution (buffer) showed a yellow coloration.
• 1 ml of the AAV-2-mVenus (derived from P 39) was pipeted to into dish 2. Note: the virus solution showed (buffer) an orange coloration.
• 1 ml of the AAV-2-mVenus (derived from P 38) was pipeted to into dish 3. Note: the virus solution showed (buffer) an orange coloration.
• 1 ml of the AAV-2-mVenus (derived from P 38) was pipeted to into dish 4. Note: the virus solution showed (buffer) an orange coloration.

Apart from the dilution, the transduction was performed according to the standart protocol.

Investigators: Johannes, Patrick

38.Labortag 22.06.2010: Midiprep of pHelper plasmid; cloning of the rfc25 MCS

Investigators: Bea, Chris W, Adrian, Achim

• Hybridisation of oligos RFC25 EcoR1+BglII for & RFC25 EcoR1+BglII rev
  • Programm ORIGAMI1 was modified for normal oligos:
    • 1 95°C 7'
    • 2 95°C 1'
    • -1°C R=0,3°s
    • Rep 70

• conc of Oligos: 138,3µg/µl

Digestion

• A 1% agarose gel was prepared for plasmid separation

• Production of antibiotika-stock-solutions (10 x 1ml AMP)

• Midi Prep of pAAV-Helper: concentration. 732,6 µg/µl

• dilution of our Oligos RFC from 138,3 µg/µl 1:10 13,83 (71bp long)=> 0,64µl
• Vektor pAAV-MCS 23.3 µg/µl => 8,36µl
• two plates are placed in the 37°C room

• Trafo has been performed following standard protocols

39.Labortag 23.06.2010: Preparation of Viral Stock, Seeding cells

Design of Primer

Achim, Hanna

In order to sequence the hGH (polyadenylation) sequence and in general the GOI (gene of interest :) ) primer were designed: File:Primer GOI+polyA pAAV iGEM-MCS mVenus YFP.pdf
These primer will be used in order to sequence P38 (pAAV_iGEM_mVenus-YFP) which delivered fluorescencing HT1080 cells - in comparison to the already sequenced P39 clone. Further on they can be used in general for sequencing any GOI.
These oligos were ordered at sigma aldrich as E@sy Oligos.
P38 was send for sequencing with GATC_std_pTESp-1 primer: 12 µL P39 (180 ng/µL) + 18 µL H₂O

Sequencing of pKEX-VP1

Achim, Hanna, Adrian, Chris W.
Primer:

• VP1 primer for pKEX forward: V = 3 µL + 27 µL H₂O
• VP1 primer for pKEX reverse: V = 3 µL + 27 µL H₂O

Vector:

• pKEX-VP1 (P27.2): c = 693 ng/µL, V = 3 µL + 27 µL H₂O

Thaw HT1080 and AAV-293 cells

Achim, Hanna (guided by Sven)
Thawing of HT1080 and AAV-293 cells was performed following this protocol: Media:Freiburg10 Thawing cells.pdf

Picking clones of pAAV_RFC25 and inoculating 250 mL DYT with pAAV_iGEM_mVenus-YFP (P38) for Midi-Prep

Achim, Chris W., Hanna
Bacteria cultures are stored in 37°C room over night.

Adrian, Sven

Results of transduction, ~ 1% of the HT1080 showed expression of mVenus.

Bright light image 1	Fluoresce microscopy image 1
Bright light image 1	Fluoresce microscopy image 1

Preparation of viral stocks

Johannes, Bea Please fill in!!!
Steril filtration of virus particles was performed (guided by Sven). Viral stocks are stored at -80°C.

40.Labortag 24.06.2010: Labmeeting, Presentation/Update by Patrick and Adrian, Midi Prep of pAAV_iGEM_mVenus-YFP, Mini Prep pAAV_RFC25

Delivery of:

Proteinkinase K (will be used for the degradation of the viral capsid prior to qPCR)
Benzonase (will be used fur viral stock preparation)
Primer for for ITR-Conversion to iGEM-Standart

• Presentations of Adrian and Patrick: File:Adrian.ppt File:Patrick.ppt

Midi-Prep of pAAV_iGEM_mVenus-YFP

Investigators: Hanna, Chris W (Adrian inserted RNAse and Ethanol into Buffers)

• new kit from Qiagen was used
• 35 ml of the over-night culture was filled into a 50 mL falcon and centrifuged at 5000 g at 4°C for 5 minutes.
• supernatant was discarded
• Midi-prep was performed according to manual of Qiagen
• final concentrations: 380,4 µg/µl
• Name of eppi: P44

Mini Prep of P42 and P43 pAAV-RFC-25

Investigator: Bea

• Mini-Prep was performed following standard protocols
• conc: P42: 321,5 µg/µl
• conc: P43: 310,1 µg/µl

ITR modification via PCR

• Primers for ITR modification were resuspended and labeled: left forward: o24, left reverse: o25, right forward: o26, right reverse: o27

Work on pKEX backbones

Volker

The sequencing data was evaluated and BLAST searches were carried out on NCBI to answer the question weather the sequence belongs to the backbone pKEX. This question could be answered positively.
There are standard Primers from GATC that prime in the sequence. The three expression plasmids from PD Kleinschmidt will therefor be sequenced tomorrow.
Additionnaly nine primers for sequences in the AAV Rep and Cap genes were disigned. '

41.Labortag 25.06.2010: PCR of ITRs, Splitting HT1080 and AAV-293 cells, Seeding of HT1080 cells, Creating Virus Stock Economics, Medium check

Preparation for PCR of ITRs

Digestion of pAAV_MCS (P9)

Splitting of HT1080 and AAV-293 cells, Seeding of HT1080 cells

Investigator: Hanna

HT1080:

• Cells showed 80 % confluence
• Cells were washed with PBS, detached with Trypsine
• 10 mL DMEM was added, cell suspension was centrifuged for 5 minutes at 200 g.
• Supernatant was discarded, pellet was resuspended with 8 mL DMEM.
• Cells were counted: 47.5 µL Trypan blue (stains dead cells) and 2.5 µL cell suspension were mixed and applied onto a Neubauer counting chamber -> 2.2 x 20 x 10^-4 cells per mL
• Therefore 27 µL of the cellsuspension was added to each 3 mL DMEM in the 6-well plates. -> 2 6-well plates were prepared for transduction!
• Further on cells were splitted: 110 µL cell suspension was pipetted into 2 75T flasks each containing 20 mL DMEM and stored in the 37°C incubator.

AAV-293 cells:

• Cells showed ~ 50% confluence
• Cells were splitted following the standard protocol.

Creating Virus Stock Economics

Investigators: Adrian

Medium check

Investigator: Adrian

• three little culture bottles got prepared (H-DMEM, DMEM and PBS) and set into the incubator. In the following days they'll get checked for bacerial growth.
  

Sequencing results of pAAV_RFC25

investigators: Adrian, Bea, Hanna

SpeI restriction site deletion in sequenced data (on bottom).

sequenced sample: pAAV_RFC25 clone 2 (P43)

used primer: GATC_std_pTeSp-1.ab1
The alignment with the theoretical construct showed, that there's a exchange of one base in the RFC25-multiple cloning site. This substitution leads to the deletion of the SpeI restriction site.
Therefore we checked the order sheet (everything OK!).
We sent the second clone (P42) for sequencing (Hanna).

• V(Plasmid) = 6.5 µL
• V(H₂O) = 23.5 µL
• Primer: pTESP-1

Annotation and studies of the AAV structure

Investigator: Volker

The NGR- and the HPSG motif were annotated in the gene sequences according to [Michelfelder & Trepe; 2009] The pdb sequence were visualized with the programm [http://www.pymol.org| PyMOL] and the important motifs were highlighted.

Impressions from PyMOL

thumb|left| The viral structure of AAV-2	900px|thumb|left| Sturcture of a single AAV-2 VP2 monomer
900px|thumb|left| B-Factor indicating mobility in the crystal	900px|thumb|left| HPSG-binding-motif
900px|thumb|left| Residues of the HPSG-binding-motif	900px|thumb|left| The NGR-motif that is responsible for the integrin a5β1 binding

42.Labortag 26.06.2010

Transduction of HT1080 cells

Investigator: Adrian

• Transduction of 2x6 wells was successfully done (14.25)
• one six well is transduced with 10µg the other with 30µg DNA amount (see HEK293 infection protokoll for further information)
  

(A is up)

• the delution steps (1:10, 1:50, 1:100, 1:500) are placed upon the virus stocks in the -80°C freezer in 15 ml falcons.

Did primers for sequencing GOI arrive?

Paper reading session

Investigators: Igor, Anna, Patrick, Stefan and Volker

Several papers were read and infomation on cap-modifications were extracted.

• Trasitions of seven Tyrosines (252, 272, 444, 500, 700, 704 and 730) to Phenylalanines as described in [Zhong et al. 2008]
• Transitions of two amino acids (R459D and N551D) leading to reduced sero prevalence as described in [Inchan Kwonand, David V. Schaffer]‎

Proposed transitions Y252F, Y272F, Y444F, Y500F, Y700F, Y704F and Y730F in red & R459D and N551D in green

43.Labortag 28.06.2010: Checking HT1080 for YFP-Expression, Creating plan: urgent things to do

Checking HT1080 for YFP-Expression

• Hannas 2*6 wells (24.6) transduced by (Adrian 25.6)

Investigator: Sven, Patrick, Adrian

Results of transduction nr.2

10µg_unverd_2_(c1).JPG 48h post transduction	10µg_unverd_1_(c1).JPG 48h post transduction
30µg_unverd_2_(c1).JPG 48h post transduction	30µg_unverd_(c1).JPG 48h post transduction
30µg_unverd_4_(c1).JPG 48h post transduction	30µg unverd 3 (c1).JPG 48h post transduction
30µg_unverd_6_(c1).JPG 48h post transduction	30µg_unverd_5_(c1).JPG 48h post transduction

• The transduced cells will be checked again (29.6.).

Sequencing results of P42

Hanna
Sequencing of pAAV_RFC25 (P42): Sequencing delivered, that there weren't any base exchanges or deletions in this clone. Therefore P43 was dismissed (Plasmid and glycerol stock).

Theoretical construction of our biobricks

Theoretical cloning

Investigators: Hanna, Adrian, Chris W, Patrick, Volker

Urgent Things to do:

• Modification CAP:
  • HSPG -> 2 AS
  • Targeting (585,588...) -> 2 AS -> 1 or 2 restriction sites?! Investigator: Volker
  • Seroprevalence -> 2 AS
  • thyrosine for ubiquitination Y252F, Y272F, Y444F, Y500F, Y700F, Y704F and Y730F
  • Primer: start codons
  • EGF-Rezeptor: A431-Zellinie
    • Affibody: order the Gensequence
    • bispecific AK -> order Diabodys (are there any restriction sites?) Investigator: kristian???

• Ordering the ITRs Investigator: Hanna
  • Stratagene: right and left
  • wild-type

• Modification: REP Investigator: Volker
  • 3 restriction sites -> site directed mutagenisis vs. synthetic? ->order (check which is the cheaper approach)

• HGH Investigator: Hanna
  • restriction sites? -> are there any available biobricks?
  • biobrick production

• Beta-globin: what is the function? -> cut out?
  • where is the start and the end?
  • restriction sites?
  • biobrick production

• GMK-TK
  • restriction sites: primer
  • biobrick production
  • ordering the SR39

• tumor specific promotors
  • more Information!!!
  • telomerase specific promoters!!!

Continuation of ITR PCR

Hanna, Chris W., Adrian

• Analytic gel was run: 1.7 µL loading dye (6x) was added to 8.3 µL of each sample (left ITR: 5 µL DMSO + 10 µL DMSO; right ITR: 5 µL DMSO + 10 µL DMSO).
• 110 V, 35 minutes
• No ITr bands were detectable - just 2 weak "primer-bands"

Conclusion: PCR didn't work. Because of that new primers were designed and ordered (Achim), which are longer and posses therefore higher annealing temperatures.

ITRs (theoretical)

Adrian, Achim, Hanna

• trs sequences (GTTGG) are present in both ITRs (Stratagene)!
• assumption: transcription despite of ITR-secondary structure - no single-strand nick at trs-sequence in transduced cells ?

44.Labortag 29.06.2010: Discussionround 3, Seeding HEK293 cells for transfection and titering

DISCUSSIONROUND

• Affibodys
  • Investigator: Anna
    • Affibodys are 6-7kD Proteins derived from Protein A/Z
    • they are binding to domain 3 from IGFR
    • 13 AS are replaceable for changing the tropism

• Tyrosine Mutants
  • Investigator: Adrian
    • replacements are done in VP3! => Volker?!
    • no multi-mutants are available (instead of single mutations many Y->F)
    • best candidates are: Y730F and Y444F.

• Second strand DNA-synthesis in Transduced cells
  • Investigator: Achim
    • Dual strand synthesis is the main limiting for transduction/transgen expression.

Seeding HT-cells for transfection and titering

Investigators: Sven, Adrian, Bea

• The pellet was resolved in 4ml we had a 550.000 cells/ml
• 2x6 well dishes got prepared:

1. Plate I(A is up)

2. Plate II (A is up)

Seeding HT1080-cells for transduction and qPCR

Hanna

• Cell density was determined with trypan blue and counting chamber: 2 x 20 x 10^4 cells/mL
• wanted: 5 x 10^4 cells --> 125 µL cell suspension per well
• Cells were seeded into a 24-well-plate (row C and D!): 1.5 mL DMEM + 125 µL cell suspension per well
• cells were incubated for 1 hour at 37°C

Further on, cells were splitted: ~ 3 mL cell suspension was added to ~ 17 mL DMEM

Transduction of HT1080 cells for qPCR

Chris W.

45.Labortag 30.06.2010: Titering Procedure via qPCR, Transduction of 6well plates nr.4, (Seeding HEK293 for Transfection?), further Gene-Order-Investigation

Harvesting cells for qPCR

Investigators: Chris W, Hanna
Transduced HT1080 cells were harvested following Sven's standard protocol.

Transduction of 2 x 6well plates nr.4

Investigators: Bea, Adrian...

• Master plan: Different Transduction Mechanisms
  • rise the amount of transduced particels, instead of 500µl, 1000µl of the AAV-stock getting pipetted into each well.
  • the second plate gets stimulated via UV-light to boost the expression of DNA-Repair mechanisms. This should enhance the second strand synthesis of our ssDNA-GOI => a rise of YFP Expression!

1. Plate I(A is up)

Transduction:

2. Plate II (A is up)

Transduction:

(Seeding HEK293 for Transfection?)

Investigators: ...

beta-globin intron

Investigators: Adrian, Bea
We found some interesting literature which point out that introns have an influence on the eucaryotic gene expression on DNA and RNA level. Next steps are going to be the designing of the beta-globin intron and maybe further analysis of the other mentioned introns. Maybe two or three more introns can be ordered.
Media:Freiburg10_LeHir_et_al_How_introns_influence_and_enhance_eukaryotic_gene_expression_2003.pdf
Media:Freiburg10_Noe_et_al_An_intron_is_required_dro_dihydrofolate_reductase_protein_stability_2008.pdf
Media:Freiburg10_Mashadrizeh_et_al_A_systematic_study_of_the_function_of_the_human_beta-globin_introns_on_the_expression_of_the_human_coagulation_factor_in_cultured_Chinese_hamster_ovary_cells_2009.pdf‎

• Media:Chicken_beta-globin_insulator_overcomes_variegation_of_transgenes_in_Xenopus_embryos.pdf‎

hGH sequence

Hanna

• orientation in pAAV_MCS is reverse annotated... but in the same orientation as in human growth hormone I gene!
• Blast and alignment with other expression vectors and the human growth hormone I revealed that Stratagene annotated 1 bp too much
• "A common feature of mRNA in higher eukaryotes (but not in yeast) is the presence of the highly conserved sequence AAUAAA in the region from 11-30 nucleotides upstream of the site of poly(A) addition. (...) The signal is needed for both cleavage and polyadenylation." (Genes VIII, Lewin, P. 720)
• good news: There're no iGEM restriction sites in the sequence (RFC25)
• Conclusion: Instead of ordering the whole sequenc in iGEM standard it would be probably easier (and cheaper) to perform a PCR.
• Done: Oligos were designed for PCR!

ITRs: new strategy

Hanna
Plan:

• Digest pAAV_MCS with AlwNI. Result: one large fragment containing the left ITR + a small fragment containing right ITR.
• Digest both fragments with NotI and PstI.
• Hybridize oligos containing RFC10 restriction sites (designed by Hanna), ligate them via intermediate steps (ligating into a vector) with ITRs . Comment: One oligo posseses a blunt end - therefore "intermediate step-vector" needs to be digested with an enzyme producing a blunt site.
• Done: Oligos were designed. Need to be checked!

Sequencing of pAAV_iGEM-mVenus-YFP

Hanna, Chris W.

• 3 µL of O28, 29 and 30 each were mixed with 27 µL water -> primer fpr sequencing of GOI and of hGH sequence
• 11.1 µL plasmid + 18.9 µL H₂O

Investigation of the Kleinschmidt sequencing

Investigator: Volker

The CMV promoter sequence was found in front of the expression constructs of VP2 and VP3

The sequencing of den unknown backbone pKEX revealed that the construct VP1ex from the DKFZ seemed not to contain a regulatory region for the expresion of the VP1 ORF, but in the backbonesequence there were some standard primers from GATC that could be used to sequence the insert of all expression constructs.

This sequencing was done at the 26.06.2010. The read into the construct VP1 showed a long homologous region with the ORF of VP1 where as the sequencing of VP2ex and VP3ex did not show a homologous region with the ORFs of VP2 and VP3.

The test weather primers of GATC bind to the unknown region gave a positive hit in both constructs with the primer GATC_std_CMV_f. This primer is specific for the sequence of the CMV promoter. After this indice the sequences VM_2 26.06. -pBR1.ab1 and VM_3 26.06. -pBR1.ab1 were aligned with the sequence of the CMV promoter provieded in the stratagene kit in the plasmid pAAV-MCS. The majority of the sequence fitted well with CMV promoter as indicated in the image in purple. At the 5' end of the CMV promoter there were some missmatches in the alignment indicated in yellow.

The fact that VP2ex and VP3ex contained a CMV promoter element which was not included in VP1ex was unexpected. The sequencing with the standard primer GATC_std_CMV_f which binds at the 3' end of the CMV promoter and will probably sequence the ORF of VP2ex and VP3ex was ordered.