Team:Osaka/Notebook

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Contents

Notebook

July 29 (Thu)

Attendance: Torigata, Takino, Teoh, Yasumoto, Kakuda, Saka, Tamura

  1. Safety lecture for junior members.
  2. Preparation of LB agar plates (26 Amp, 25 Kan, 25 Cam).

July 31 (Sat)

Attendance: Miyatake, Hirayama, Torigata, Teoh, Tadashi, Yasumoto, Kakuda, Saka

  1. Meeting
    • Summer project schedule
    • List of genes to clone

August 2 (Mon)

Attendance: Torigata, Takino, Teoh, Tadashi, Yasumoto, Saka

  1. Culture medium preparation
    • LB agar plates (49 antibiotic-less plates)
    • LB liquid medium (500 ml)
  2. Competent cells preparation - Nojima Method
    • SOB medium (MgCl2 not yet added) -> stored at 4˚C
    • TB buffer -> stored at 4˚C
    • Single-colony streaking of E. coli (strain DH5α) on 2 LB agar plates -> 37˚C incubation o/n

Tomorrow we shall prepare the remainder of the reagents and inoculate SOB with o/n-incubated E. coli.

August 3 (Tue)

Attendance: Nakamura, Kakuda, Saka, Yasumoto, Teoh

  1. Competent cells preparation (continued)
    • Preparation of glucose solution for making SOC medium.
    • Inoculation of pre-culture SOB from o/n-incubated agar plate colonies.
    • (Night) Transfer from pre-culture to growth culture.

August 4 (Wed)

Attendance: Nakamura, Saka, Kakuda, Yasumoto, Torigata, Teoh

  1. OD measurements throughout the day till required OD (0.3~0.7) was obtained.
  2. Completion of competent cells according to protocol.

August 5 (Thu)

Attendance: Nakamura, Yasumoto, Saka, Kakuda, Takino

  1. Transformation of Registry parts:
IDPart NameResistanceDescription
2-20J<bbpart>BBa_K118023</bbpart>AC. fermi endocellulase Cen A coding
2-20H<bbpart>BBa_K118022</bbpart>AC. fermi exocellulase Cex coding
1-2M<bbpart>BBa_B0034</bbpart>ARBS
1-13D<bbpart>BBa_B0010</bbpart>Aterminator
1-1D<bbpart>BBa_R0010</bbpart>Apromoter
1-18F<bbpart>BBa_E1010</bbpart>KRFP coding

Note: 'ID' is an internal identifier used by wet work members to simplify labeling etc. In the case of iGEM distribution parts it usually refers to the plate location.

August 6 (Fri)

Attendance: Nakamura, Saka, Yasumoto, Takino, Teoh

  1. Colony check
    • All transformed cells produced colonies!
    • Non-transformed cells (negative controls) did not grow on Amp, Kan or Cam plates -> confirmed lack of natural antibiotic resistance
  2. Colonies transferred to 3ml LB growth medium & incubated o/n at 37˚C

August 7 (Sat)

Attendance: Nakamura, Saka, Yasumoto, Takino

  1. Miniprep of o/n-incubated colonies (2-20J, 2-20H, 1-2M, 1-13D, 1-1D, 1-18F) using Sigma-Aldrich Plasmid Miniprep Kit
  2. Transformation of construction plasmids
IDPart NameResistanceDescription
1-1C<bbpart>pSB1A3</bbpart>Aconstruction plasmid containing mRFP coding device (<bbpart>BBa_J04450</bbpart>)
1-3A<bbpart>pSB1C3</bbpart>C(" ")
1-5A<bbpart>pSB1K3</bbpart>K(" ")
  1. Meeting

August 8 (Sun)

Attendance: Nakamura, Yasumoto

  1. Colony check
    • All parts successfully transformed
  2. Transfer to LB culture medium

August 9 (Mon)

  1. Miniprep of 1-1C
  2. Restriction digests of 2-20H, 2-20J, 1-1D, 1-18F, 1-1C, 1-13D, 1-2M
    • (WHICH ENZYMES?)
  3. Gel electrophoresis of digests ("cut check")
    • 2-20H, 2-20J, 1-1C -> OK
    • 1-1D, 1-18F, 1-13D, 1-2M -> not cut (single band, MW approx. equal to vector + insert)
  4. Transfer of 1-3A, 1-5A colonies to solution culture (repeat)
    • Yesterday's inoculated culture mediums contained the wrong antibiotics!
  5. Transformation of <bbpart>BBa_I13521</bbpart>, <bbpart>BBa_I13522</bbpart>, <bbpart>BBa_I13600</bbpart>, <bbpart>BBa_K204031</bbpart>, <bbpart>BBa_K204051</bbpart>, <bbpart>BBa_K204032</bbpart> from last year's stock

August 10 (Tue)

  1. Miniprep of 1-3A, 1-5A
  2. Restriction digests of 1-3A, 1-5A
  3. Gel electrophoresis
    1. 1st run: 1-3A, 1-5A (newly miniprepped), 1-1D, 1-18F, 1-13D, 1-2M (repeat)
      • 1-3A, 1-5A -> OK; others -> not cut (again)
    2. 2nd run: 1-1D, 1-18F, 1-13D, 1-2M (2nd repeat)
      • all parts not cut

August 11 (Wed)

  1. Miniprep of last year's parts transformed on Monday
  2. Gel electrophoresis of 1-1D, 1-18F, 1-13D, 1-2M (3rd repeat!!!)
    • all 4 not cut... AGAIN
    • so far all restriction digests involving XbaI seem to have failed; problem with enzyme stock?
    • will try with different set of restriction enzymes next week
  3. Sent miniprepped last year's parts to ECUST team in Shanghai, China

August 16 (Mon)

  1. Restriction digests
    • 1-13D,　1-2M,　1-1D,　1-18F with EcoRI, PstI to check for point mutation(s) affecting XbaI site
    • 2-20J with XbaI, PstI to check/confirm XbaI activity
  2. Gel electrophoresis of digests
    • (RESULTS?)
  3. Colony pick-up & transfer to solution culture (repeat; 2 each): 1-13D,　1-2M,　1-1D,　1-18F
    • 3ml LB liquid medium; 3μl Amp or 0.6μl Kan solution added

August 17 (Tue)

  1. Mini-prep of 1-13D,　1-2M,　1-1D,　1-18F parts inoculated yesterday (2 of each)
  2. 'Cut check' (restriction digest + gel electrophoresis to confirm insert) of the miniprepped parts:
    • 1-1D, 1-18F with EcoRI, SpeI
    • 1-13D, 1-2M with XbaI, PstI
    • (RESULTS?)
  3. Transformation of secretion tag parts using 25μl of competent cells each
IDPart NameResistanceDescription
2-22P<bbpart>BBa_K103006</bbpart>AOmpA outer membrane protein + linker
1-2J<bbpart>BBa_J32015</bbpart>A,KPelB leader sequence

August 18 (Wed)

iGEM Japan Meet-Up in Kyoto Attendance: Nakamura, Yasumoto, Saka, Kakuda

August 19 (Thu)

  1. Transfer of 2-22P, 1-2J to solution culture
  2. Gel electrophoresis of digests from 'cut check' products from Tuesday
    • repeat run, but each digest together with undigested plasmid DNA)
    • 2% agarose gel instead of the usual 1%
    • (RESULTS?)
  3. Gel electrophoresis of 1-1D digest only
    • (RESULT?)
  4. Multiple restriction digests of 1-1D to check for problems at restriction sites
    • tried the following: EcoRI only; SpeI only; EcoRI + SpeI
  5. Night: miniprep of 2-22P, 1-2J inoculated in the morning

August 20 (Fri)

  1. Gel electrophoresis of 1-1D and its digests
    • (RESULTS?)
  2. 'Cut check' of parts miniprepped the night before
    • both 2-22P & 1-2J cut with XbaI, PstI
    • enzyme inactivation at 80℃, 20min
    • (RESULTS?)
  3. Restriction digest of 2-20J (WHICH ENZYMES?)
  4. Ligation according to 3A assembly method: 2-20J or 2-20H + 2-22P or 1-2J; 1-3A as vector
    • reaction mixture: 2μl of each plasmid, 2μl ligase buffer, 1μl T4 DNA ligase, water to make 20μl total
    • reaction at room temperature for 10min; ligase inactivation at 80℃ for 20min
  5. Transformation of ligated parts using 50μl of competent cells each; 2μl ligation product; 150μl Chloramphenicol spread on agar plates before inoculation with pre-incubation mix

August 21 (Sat)

  1. Transfer of white (non-RFP) colonies from yesterday's transformation to 3ml LB liquid medium added with 1μl Cam solution
    • we later realized that the upstream and downstream parts had been mixed up in these ligations, so the ligation products (and these corresponding solution cultures) were discarded
  2. 3A assembly ligation: 1-1D as upstream, 1-2M as downstream, 1-3A as vector
    • same ligation mix composition as yesterday's
  3. Transformation of <1> with pre-incubation for 1.5hr instead of 1hr, transformation mix inoculated onto Chloramphenicol plate




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