2025 Maresca

Gene & Genome Analysis (Bio 383)

Pre-semester reagent list from 2022

Revised syllabus 10/31/25

Week class day date topics
1 1 W 9/3 Tom: Intro to the course
Kate: intro to safetyfluorescence microscope
live GFP-tubulin S2 cell imaging on 8 conA coverslip dishes (prepared just before class)
pipetting part 1
2 1 M 9/8 pipetting part 2
microscopy HeLa slides
S2 culture (24 flasks – each student makes one)
  3 W 9/10 Transformation
3 4 M 9/15 mini preppcr
  5 W 9/17 0.9% gel, band extraction
4 6 M 9/22 invitro transcription kitconA dishes
  7 W 9/24 gel, + Nanodrop
5 8 M 9/29 ds RNA treatment in 2 wells of a 6-well dish
  9 W 10/1 16 conA dishes (Tom)
5 mL S2 aliquots
6 10 M 10/6 IF demo (Kate)
Handout
repeat ds RNA treatment
make 2 conA coverslip per group
  11 W 10/8 immunostaining
Handout2
Revised immunostaining for S2 cells
IF (students seed coverslips and fix) on control and dsRNA treated cells
7   M 10/13 Indigenous People’s Day
  12 W 10/15 looking at coverslips (Ctrl vs treated)
8 13 M 10/20 work on poster presentation
  14 W 10/22 presentations (in ILC)
Get HeLa from Tom, put on coverslips to treat & stain for 10/27
    F 10/24 HeLa into small flasks for students 10/27
HeLa STLC treated coverslips (5 µM overnight), fixed and stained for tubulin (red) & PhosH3 (green)

Transform E. coli (NEB C2988) with PX458GFP; miniprep to get plasmid
See DNA concentrations below
9 15 M 10/27 Tom mixes DNA with Mirus, aliquots
splitting demo: Splitting handout
Splitting & nucleofection PowerPoint
Nucleofection protocol for sterile hood
1 HeLa flask per group (8)
Get DNA from freezer
Students trypsinize, put some into flask, the rest into nucleofection.
Nucleofected cells into flask, imaging dish.
transformations
  16 W 10/29 Imaging dishes with nucleofected HeLa from 10/27
stain with Nuc Blue
check for transformation efficiency

Split flasks from 10/27 (not actually ready to split on 10/29)

Kate makes 10 control coverslips, to be treated with STLC, then fixed.

Make 250 µL 1 mM STLC from 100 mM stock: (2.5 µL + 250 µL DMSO)
Add 10 µL 1mM stock to each 2mL well to make 5 µM STLC
    Th 10/30 Kate: treat HeLa controls with 5 µM STLC at end of day.
    F 10/31 Kate fixes HeLa controls (4% PFA)
Tom: makes coverslips from student nucleofected flasks + control
    Sun 11/3 Tom treats coverslips with STLC
10 17 M 11/3 Morning: Kate fixes (4% PFA) coverslips from 11/3
Block by adding 10% BSA 15 min before class
Make primaries: tubulin (rat) & Ki67 (rabbit)
Make secondaries: Anti-rat green, anti-rabbit red
New protocol
New protocol for BSC
fix and IF knockdown HeLa; image
  18 W 11/5 Fixed cell analysis to look for loss of Ki-67
and for the chromosome phenotype
11 19 M 11/10 Prepare plasmids for Gibson assembly reactions

Restriction digest of PX458GFP, 2 per group
in pcr tubes, in thermocycler. One uncut plasmid for control

(Bbs1) (new from NEB freezer 10/31/25 R3539S) Small is available at NEBNow, need 2 or special order the large.

Clone construct, prep vector

1% gel
NEB 1Kb marker

and gel extraction kit (1 per group – students combine their 2 cut plasmids)

Nanodrop

Traces are weird – unknown peak at about 245 nm, 260/280 ratios as high as 20!
  20 W 11/12 Gibson assembly (isothermal) reaction with chosen DNA from Twist and PX458GFP

*Magic Mix 15 µL: (enzymes from “Maresca” box)
• T5 exonuclease
• Phusion polymerase
• Taq ligase

Cut plasmid 50 – 100 ng
Insert equimolar amount (we will measure this for you)

DNAse-free water up to 20 µL

Incubate at 50°C for 15 minutes

Transform 5-10 µL of reaction into competent E. coli cells

bacterial Transformation
12 21 M 11/17 Restriction digest: EcoR1
pcr tubes for reaction
1% SYBR safe gel
1 KB ladder NEB
Minipreps and plasmidsaurus sequencing
  22 W 11/19 DNA sequence analysis and nucleofection of your plasmid into HeLa
cells
Students make one flask and seed one coverslip
    F 11/21 Kate: Fix coverslips in 4%PFA; store in PBS-Tw-Azide
Seed new coverslips from Wed nucleofected flasks
13 23 M 11/24 Before class: Kate: fix Fri coverslips in 4%PFA; block all.
Immunofluorescence to assay for KO phenotype of your target gene.
    W 11/26 Thanksgiving Break
14 24 M 12/1 Fixed cell analysis to look for phenotype
  25 W 12/3 Continuing looking at fixed cells, quantify, and group work on poster presentations
15 26 M 12/8 CRISPR Group Presentation
Extraction number ng/µL DNA
1 345
2 221
3 350
4 2052
5 108
6 149
7 306
8 246
9 302
10 137
11 223
12 210