"
Team:GeorgiaTech/WeekSeven
From 2010.igem.org
(Difference between revisions)
Aschwartz9 (Talk | contribs) |
Aschwartz9 (Talk | contribs) |
||
| (One intermediate revision not shown) | |||
| Line 5: | Line 5: | ||
<style type="text/css"> | <style type="text/css"> | ||
<!-- | <!-- | ||
| + | |||
| + | a, a:hover, a:visited{ | ||
| + | color: white; | ||
| + | font-weight: bold; | ||
| + | text-decoration: underline; | ||
| + | } | ||
| + | a:hover { | ||
| + | color: black; | ||
| + | } | ||
body | body | ||
| Line 76: | Line 85: | ||
| - | + | <style type="text/css">ol{margin:0;padding:0}p{margin:0}.c3{padding-left:0pt;line-height:1.15;direction:ltr;margin-left:72.0pt}.c7{padding-left:0pt;line-height:1.15;direction:ltr;margin-left:36.0pt}.c1{color:#ffffff;font-size:10pt;font-family:Arial}.c0{line-height:1.15;text-indent:0pt;direction:ltr}.c6{list-style-type:disc}.c8{list-style-type:circle}.c4{text-decoration:underline}.c9{font-style:italic}.c5{list-style-type:lower-latin}.c11{background-color:#ffffff}.c10{text-decoration:line-through}.c2{font-weight:bold}</style></head><body class="c11"><p class="c0"><span class="c1 c2">9/13/2010</span></p><p class="c0"><span class="c1">Christina, Christian, Scott, Debika, Margo</span></p><p class="c0"><span class="c1 c4"> </span></p><p class="c0"><span class="c1">Started from new aliquots of primers, 1:10 dilution of primer stock in MilliQ H2O. Changes are </span><span class="c1 c2">bolded</span><span class="c1">.</span></p><p class="c0"><span class="c1">Reactions: HybB F+R, OmpA F+R, AOX1A F&R, and AOX1B F&R.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4 c2">New PCR protocol:</span></p><p class="c0"><span class="c1">26.5 uL H2O</span></p><p class="c0"><span class="c1">10 uL </span><span class="c1 c2">TaQ 5X Reaction buffer</span></p><p class="c0"><span class="c1">5 uL forward primer </span></p><p class="c0"><span class="c1">5 uL reverse primer</span></p><p class="c0"><span class="c1">1 uL dNTP 10 mM - (thawed & kept on ice)</span></p><p class="c0"><span class="c1 c2">2 uL</span><span class="c1"> template DNA</span></p><p class="c0"><span class="c1">0.5 uL polymerase enzyme, </span><span class="c1 c2">TaQ</span></p><p class="c0"><span class="c1 c2">Total Volume= 50 uL</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">NOTE: We multiplied the entire protocol by 2 to get </span><span class="c1 c2">50 uL total volume</span><span class="c1"> for this attempt</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">We are reducing number of experiments at once (e.g. not all setups at once, just a few) - HybB, OmpA, AOX1A F&R, and AOX1B F&R.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">We are preparing two strips for PCR using this recipe and setup. We are then running them side-by-side in the PCR machine, one strip using the old cycle program, and one strip with two key modifications (suggested by Megan). We increased number of PCR cycles from 29 to 34 cycles, and reduced annealing temperature to 52 degrees. (If we go to low with the annealing temperature, we will be able to tell because we will see lots of bands on PCR.)</span></p><p class="c0"><span class="c1"></span><span class="c1 c4">Making gel for PCR</span></p><p class="c0"><span class="c1">1. Add 0.35g agarose to 35mL autoclaved water.</span></p><p class="c0"><span class="c1">2. Add 3.5mL 1X TBE</span></p><p class="c0"><span class="c1">3. Heat in microwave until agarose dissolves. Allow to cool. Make sure there are NO VAPORS before adding EtBr. EtBr is an intercalator. Don’t vaporize it, especially near your face!</span></p><p class="c0"><span class="c1">4. Add 38.5սL EtBr (edited from 45 uL, make 1000X)</span></p><p class="c0"><span class="c1">5. Pour gel and allow to harden. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Goals: Purify the PCR reactions and look at them on a gel</span></p><p class="c0"><span class="c1 c2"> </span></p><p class="c0"><span class="c1 c9 c2">See protocols page for PCR purification</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">note: unless we want to keep the DNA for future use (unless we NEED pure DNA), the purification step is not necessary. We could have just run the DNA without the purification step... EtBr is an intercalator that will only bind the DNA anyway.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4 c2"> </span></p><p class="c0"><span class="c1 c2">(Pics from 9/11 and 9/13 were taped to the lab bench for group reference -- maybe get Megan and/or Richard to help us interpret.)</span></p><p class="c0"><span class="c1 c4 c2"> </span></p><p class="c0"><span class="c1 c4">Starter cultures for cryostocks</span></p><p class="c0"><span class="c1">Made starter cultures (3uL CARB + 3mL LB + cells) from triple smear plates (9/10/2010), and put in the incubator for 24 hours.. Tomorrow (on 9/14/2010), make cryostocks from these starter cultures. Labelled according to insert.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">9/14/2010</span></p><p class="c0"><span class="c1">Results from 9/13/2010: The previous gel had fairly good AOX bands but after consulting with Richard we decided that the other samples weren’t represented in the gel. Further, we should have seen primer bands near the end, so in future gels it’s important not to let samples run off. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Miniprep</span></p><p class="c0"><span class="c1">In order to prepare for another gel, a miniprep of the following samples from the starter cultures made on 9/13/2010 were run:</span></p><p class="c0"><span class="c1">1. PSB1A3</span></p><p class="c0"><span class="c1">2. AOX1a</span></p><p class="c0"><span class="c1">3. ompA</span></p><p class="c0"><span class="c1">4. hybB</span></p><p class="c0"><span class="c1">5. AOX1b</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">The contents were labeled and stored in the -20 freezer for further use in the gel. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Crystocks</span></p><p class="c0"><span class="c1">Cryostocks were made from starter cultures grown on 9/13/2010. Two distinct colonies were taken from each plate - so there are duplicates of each. Stored in the -80C labelled: </span></p><p class="c0"><span class="c1">9-14 clg HybB (2)</span></p><p class="c0"><span class="c1">9-14 clg ompA (2)</span></p><p class="c0"><span class="c1">9-14 clg AOX1a (2)</span></p><p class="c0"><span class="c1">9-14 clg AOX1b (2)</span></p><p class="c0"><span class="c1">9-14 clg psb1A3 (2) [note: 1 of these starter cultures turned red, the other did not.]</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">9/15/2010</span></p><p class="c0"><span class="c1 c4">Goals:</span><span class="c1"> Perform PCR on the new minipreps from 9/14/2010 (using new 1:10 aliquots of primers from 9/13/2010)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">PCR Protocol</span></p><p class="c0"><span class="c1">26.5 uL H2O</span></p><p class="c0"><span class="c1">10 uL </span><span class="c1 c2">TaQ 5X Reaction buffer</span></p><p class="c0"><span class="c1">5 uL forward primer </span></p><p class="c0"><span class="c1">5 uL reverse primer</span></p><p class="c0"><span class="c1">1 uL dNTP 10 mM - (thawed & kept on ice)</span></p><p class="c0"><span class="c1 c2">2 uL</span><span class="c1"> template DNA</span></p><p class="c0"><span class="c1">0.5 uL polymerase enzyme, </span><span class="c1 c2">TaQ</span></p><p class="c0"><span class="c1 c2">Total Volume= 50 uL</span></p><p class="c0"><span class="c1">Notes: Wear gloves while doing the reaction. Keep all reagents on ice, including the PCR reactions. Add in the order of the protocol- get out the enzyme and place on ice right before you are about to use.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Reactions Done in PCR:</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">HyBb F,R</span></li><li class="c7"><span class="c1">OmpA F,R</span></li><li class="c7"><span class="c1">Aox1a F,R</span></li><li class="c7"><span class="c1">Aox1a F,R2</span></li><li class="c7"><span class="c1">Aox1b F,R</span></li><li class="c7"><span class="c1">Aox1b F,R2</span></li></ol><p class="c0"><span class="c1">Notes: We are using a master mix of Water, TAQ Buffer, DNTPS, and TAQ. Add this to all the tubes (everything on ice), then add all the DNA reagents.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Results from nanospec:</span></p><p class="c0"><span class="c1 c4 c2">Sample Concentration (ng/uL)</span></p><p class="c0"><span class="c1">hybB 155.2 </span></p><p class="c0"><span class="c1">ompA 70.2</span></p><p class="c0"><span class="c1">Aox1a 241.3</span></p><p class="c0"><span class="c1">Aox1b 253.2</span></p><p class="c0"><span class="c1">psb1A3 53.6</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Making gel for PCR</span></p><p class="c0"><span class="c1">1. Add 0.35g agarose to 36 mL 1 x TBEautoclaved water.</span></p><p class="c0"><span class="c1">2. Heat in microwave until agarose dissolves. Allow to cool. Make sure there are NO VAPORS before adding EtBr. EtBr is an intercalator. Don’t vaporize it, especially near your face!</span></p><p class="c0"><span class="c1">3. Add 35 սL EtBr (edited from 45 uL, make 1000X)</span></p><p class="c0"><span class="c1">4. Pour gel and allow to harden. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">9/16/2010</span></p><p class="c0"><span class="c1 c4">Goals: </span></p><ol class="c6"><li class="c7" value="1"><span class="c1">Interpret gel results of the PCR from 9/15/2010</span></li><li class="c7"><span class="c1">Perform PCR (from 9/15/2010) again, this time with:</span></li></ol><ol class="c8"><li class="c3" value="1"><span class="c1">PHUSION Polymerase/Buffer</span></li><li class="c3"><span class="c1">RFP</span></li></ol><p class="c0"><span class="c1 c4">What we did:</span></p><p class="c0"><span class="c1">(Christina, Rob)</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">Performed PCR with Phusion </span></li><li class="c7"><span class="c1">Reactions: </span></li></ol><ol class="c5"><li class="c3" value="1"><span class="c1">HyBb F,R</span></li><li class="c3"><span class="c1">OmpA F,R</span></li><li class="c3"><span class="c1">Aox1a F,R</span></li><li class="c3"><span class="c1">Aox1a F,R2</span></li><li class="c3"><span class="c1">Aox1b F,R</span></li><li class="c3"><span class="c1">Aox1b F,R2</span></li><li class="c3"><span class="c1">RFP F,R</span></li><li class="c3"><span class="c1">RFP F2,R</span></li></ol><ol class=""><li class="c7" value="7"><span class="c1">Performed miniprep of pSB1A3 from cell culture grown on 9/15/2010 (non-red)</span></li></ol><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">PCR Protocol</span></p><p class="c0"><span class="c1">26.5 uL H2O</span></p><p class="c0"><span class="c1">10 uL </span><span class="c1 c2">PHUSION 5X Reaction buffer</span></p><p class="c0"><span class="c1">5 uL forward primer </span></p><p class="c0"><span class="c1">5 uL reverse primer</span></p><p class="c0"><span class="c1">1 uL dNTP 10 mM - (thawed & kept on ice)</span></p><p class="c0"><span class="c1 c2">2 uL</span><span class="c1"> template DNA</span></p><p class="c0"><span class="c1">0.5 uL polymerase enzyme, </span><span class="c1 c2">PHUSION</span></p><p class="c0"><span class="c1 c2">Total Volume= 50 uL</span></p><p class="c0"><span class="c1 c2"> </span></p><p class="c0"><span class="c1 c4">Miniprep of pSB1A3</span></p><p class="c0"><span class="c1">1. Remove inoculation tubes from inoculation (37C shaker).</span></p><p class="c0"><span class="c1">2. Obtain P1 buffer from 4C refrigerator.</span></p><p class="c0"><span class="c1">3. Take centrifuge tubes and add 1.5mL of inoculated cells. </span></p><p class="c0"><span class="c1">4. Centrifuge at 3000 rpm (low) for 1-2 min. </span></p><p class="c0"><span class="c1">5. Spin until white pellet of cells forms at the bottom and liquid is more clear. </span></p><p class="c0"><span class="c1">6. Take off supernatant and discard. </span></p><p class="c0"><span class="c1">7. Repeat steps 4-6. </span></p><p class="c0"><span class="c1">8. Resuspend pelleted bacterial cells in 250սL P1 buffer. </span></p><p class="c0"><span class="c1">9. Add 250սL P2 buffer and invert 4-6 times (DO NOT VORTEX - doing so will shear DNA!)</span></p><p class="c0"><span class="c1">10. Add 350սL buffer N3 and immediately invert 4-6 times. </span></p><p class="c0"><span class="c1">11. Centrifuge for 10 min. at 13,000 rpm. </span></p><p class="c0"><span class="c1">12. Take supernatant and add to spin columns. </span></p><p class="c0"><span class="c1">13. Spin 30-60 sec. and discard flow through. </span></p><p class="c0"><span class="c1">14. Wash column with 750սL buffer PE and centrifuge 1 min. </span></p><p class="c0"><span class="c1">15. Discard flow through and centrifuge and additional minute.</span></p><p class="c0"><span class="c1">16. Please column into a clean 1.5mL microcentrifuge tube.</span></p><p class="c0"><span class="c1">17. Elute DNA by adding 30սL dH2O. </span></p><p class="c0"><span class="c1">18. Let stand for 1 min., then centrifuge for 1 min. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Cryostock of hybB cells and pSB1A3 </span><span class="c1">(from cultures on 9/15/2010)</span></p><p class="c0"><span class="c1">900 uL of cells</span></p><p class="c0"><span class="c1">100 uL DMSO</span></p><p class="c0"><span class="c1 c2">Total 1 mL</span></p><p class="c0"><span class="c1">Mix, place in -80c Freezer</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">For next time</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">Confirm all the predicted sizes match up with the observed sizes on the gel of the PCR from 9/15/2010 </span></li><li class="c7"><span class="c1">If all are confirmed (Christina has confirmed, Christian and Scott confirmed hybb, ompa), then proceed with PCR purifications of 40 uL of each reaction, then RE digests, then ligations to construct each construct</span></li></ol><p class="c0"><span class="c1 c4"> </span></p><p class="c0"><span class="c1 c2">9/17/2010</span></p><p class="c0"><span class="c1 c4">Goals:</span></p><p class="c0"><span class="c1">Since the PCR was run on 9/16 using Phusion (high fidelity), we need to:<br>A) Run gel (2 uL each)</span></p><p class="c0"><span class="c1">B) PCR purify (leftovers from the 50 uL stock= 48 uL)</span></p><p class="c0"><span class="c1">C) Nanospec</span></p><p class="c0"><span class="c1">D) Digest with restriction enzymes (runs overnight)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Protocols</span></p><p class="c0"><span class="c1 c4"> </span></p><p class="c0"><span class="c1">Make a gel for running PCR products from 9/16/2010 to make sure the PCR was successful. </span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Making gel for PCR (1% agarose gels):</span></p><p class="c0"><span class="c1">Added 180 mL 1x TBE and 1.8g agarose</span></p><p class="c0"><span class="c1">Heated up until agarose was no longer visible</span></p><p class="c0"><span class="c1">Let cool (approx. 10 min) until there are NO MORE VAPORS</span></p><p class="c0"><span class="c1">Added 180 սL Ethidium bromide (1000X)</span></p><p class="c0"><span class="c1">Pour into gels and allow to harden (large wells hold about 35 mL).</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Note: it is ok to make 6 gels at once according to the recipe above and store them. It is not necessary to “immediately” use gels as long as they are stored properly. From now on, when you make 1% gels, just fill all 6 wells at once.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Gel of the PCR from 9/16/2010 was run today and imaged:</span></p><p class="c0"><span class="c1">Lane order: 100 bp ladder|aox1aFR|aox1aFR2|aox1bFR|apx1bFR2|HybB FR|ompa FR|RFP FR| RFP F2R|100 bp ladder</span></p><p class="c0"><span class="c1">volumes:</span></p><p class="c0"><span class="c1">loaded 4 ul of the aox reactions, 7 ul of ompa and hybB, and 5 ul of the RFP reactions</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c9 c2">See protocols page for PCR purification</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Nanospec results </span><span class="c1">(PCR from 9/16/2010)</span></p><p class="c0"><span class="c1">AOX1a-F,R = 99.3 ng/uL</span></p><p class="c0"><span class="c1">AOX1a-F,R2 = 50.0 ng/uL</span></p><p class="c0"><span class="c1">AOX1b-F,R = 48.5 ng/uL</span></p><p class="c0"><span class="c1">AOX1b-F,R2 = 42.1 ng/uL</span></p><p class="c0"><span class="c1">OmpA-F,R = 27.3 ng/uL</span></p><p class="c0"><span class="c1">RFP-F2,R = 10.8 ng/uL</span></p><p class="c0"><span class="c1">Hyb-F,R = 26.2 ng/uL</span></p><p class="c0"><span class="c1">RFP-F,R = 8.8 ng/uL</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Restriction Enzyme Digest General Process</span></p><p class="c0"><span class="c1">- check buffers (NEB site)</span></p><p class="c0"><span class="c1">-check if BSA required (NEB site)</span></p><p class="c0"><span class="c1">- Start w/ HybB and RFP (start @ step A) / pBS1A3 (start @ step D)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Recipe for : 50 uL RXN</span></p><p class="c0"><span class="c1">DNA (1-2 ug- based on nanospec results)</span></p><p class="c0"><span class="c1">1 uL each enzyme</span></p><p class="c0"><span class="c1">5 uL 10X buffer</span></p><p class="c0"><span class="c1">1 uL BSA(if needed)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Today we are digesting just the HybB-F,R and RFP-F,R in order to do the ligation on this simple construct. The rest of the PCR-ed, purified, and nanoscpec’ed building blocks went into the freezer for later use.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">RE Digest Recipe for Hyb</span><span class="c1">B</span></p><p class="c0"><span class="c1">40 uL HybB-F,R (based on the nanospec results above)</span></p><p class="c0"><span class="c1">1 uL EcoRI</span></p><p class="c0"><span class="c1">1 uL NotI</span></p><p class="c0"><span class="c1">4.7 uL 10X buffer for EcoRI [Edit 9/17/2010. Only EcoRIbuffer)</span></p><p class="c0"><span class="c1">1 uL 10x BSA (based on this specfic RE mix-- BSA is required)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Place into an eppe tube, pipet gently to mix. Incubate at 37 degrees in water bath overnight.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">RE Digest Recipe for RFP-F,R</span><span class="c1">r</span></p><p class="c0"><span class="c1">40 uL RFP-F,R (based on the nanospec results above) [Edit 9/17/2010, 110 ul not there, reduced to 40]</span></p><p class="c0"><span class="c1">1 uL SpeI (edited changed from notI to speI )</span></p><p class="c0"><span class="c1">1 uL NotI</span></p><p class="c0"><span class="c1">5 uL 10X buffer for EcoRI [Edit, only EcoRI buffer]</span></p><p class="c0"><span class="c1">1 uL10x BSA (based on this specfic RE mix-- BSA is required)</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Place into an eppendorf tube, pipette gently to mix. Incubate at 37 degrees in water bath overnight.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Results</span></p><p class="c0"><img height="366.0" src="https://static.igem.org/mediawiki/2010/8/82/9-12a.png" width="490.0"></p><p class="c0"><span class="c1 c9">Gel of multiple PCR reactions</span></p><p class="c0"><span class="c1 c9">100 bp Ladder| Aox1a FR| Aox1a FR2| Aox1b FR| Aox1b FR2| HybB FR| Ompa FR| RFP FR| RFP F2R| 100 bp ladder|</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">For Future</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">We have a strategy for each construct, written on the board. We must digest each PCR product to build our building blocks, then construct each construct through a series of ligations, digest, PCRs etc (See 9.18.2010 for strategy)</span></li></ol><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">9/18/2010</span></p><p class="c0"><span class="c1 c4">Goals</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">PCR purify the hybB F,R a</span><span class="c1 c10">nd RFP F,R</span><span class="c1"> (rxns from 9/16/2010)</span></li></ol><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4">Notes:</span></p><ol class="c6"><li class="c7" value="1"><span class="c1">RFP F,R was accidently digested with NotI and not SpeI.</span></li><li class="c7"><span class="c1">What to do? We will need to add 1 uL of SpeI and run overnight, so that the SpeI site is cleaved. <br>Just in case we need this RFP, we PCR-purified it today and stored in freezer, clearly labeled PARTLY DIGESTED RFP. If we need to use this RFP, it will need to be digested by SpeI.</span></li><li class="c7"><span class="c1">RFP band on the gel pic from 9/17/2010 was faint and nanospec showed low conc (8.8 ng /uL) versus the higher yields of the other rxns. </span></li></ol><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1">Ran PCR purification on HybB, stored in freezer. This HybB was nanospec’ed on Friday and had a concentration of 26.2 ng/uL. This has been digested by the right RE’s, EcoRI and NotI, and ready to be ligated with RFP when it has been appropriately digested.</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c9 c2">See protocols page for PCR purification</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c4 c2">BASIC PLAN FOR BUILDING PLASMID CONSTRUCTS </span></p><p class="c0"><span class="c1">from the primered building blocks, which are stored in our freezer</span></p><p class="c0"><span class="c1">A) RUN GEL - 2 uL each - to check size - this step completed for all building blocks</span></p><p class="c0"><span class="c1">B) PCR PURIFY leftovers - this step completed for all building blocks</span></p><p class="c0"><span class="c1">C) NANOSPEC - record concentrations - this step completed for all building blocks</span></p><p class="c0"><span class="c1 c2">D) DIGEST</span><span class="c1"> with restriction enzymes, overnight</span></p><p class="c0"><span class="c1 c2">E) PCR PURIFY</span><span class="c1"> digestion products</span></p><p class="c0"><span class="c1 c2">F) LIGATION</span><span class="c1"> of gene building blocks - we are starting with HybB & RFP</span></p><p class="c0"><span class="c1 c2">G) PCR </span><span class="c1">ligation products, HybB-RFP</span></p><p class="c0"><span class="c1 c2">H) DIGEST</span><span class="c1"> products, HybB-RFP</span></p><p class="c0"><span class="c1 c2">I) RUN GEL</span><span class="c1"> on small amount of digestion products, HybB-RFP</span></p><p class="c0"><span class="c1 c2">J) PCR PURIFY</span><span class="c1"> the rest of the digestion products, HybB-RFP</span></p><p class="c0"><span class="c1 c2">K) DIGEST</span><span class="c1"> the vector - we are using pBS1A3</span></p><p class="c0"><span class="c1 c2">L) PCR PURIFY</span><span class="c1"> the vector</span></p><p class="c0"><span class="c1 c2">M) LIGATION </span><span class="c1">of gene with vector, HybB-RFP and pBS1A3</span></p><p class="c0"><span class="c1 c2">N) TRANSFORMATION </span><span class="c1">of plasmid into E. coli, run overnight</span></p><p class="c0"><span class="c1 c4">Note- </span><span class="c1"> Do a nanospec after PCR purifications</span></p><p class="c0"><span class="c1"> </span></p><p class="c0"><span class="c1 c2">NOTES: </span></p><ol class="c6"><li class="c7" value="1"><span class="c1">Steps in BOLD are going to be repeated with each plasmid construct. Steps A,B, and C have already been done for each building block and won’t be repeated unless there is a specific issue with a particular building block.</span></li><li class="c7"><span class="c1">Steps K and L do not necessarily need to wait until step J is completed to be run. They are listed this way so there is no confusion about what is being digested or PCR purified at each step. </span></li></ol> | |
Latest revision as of 02:50, 28 October 2010
9/13/2010
Christina, Christian, Scott, Debika, Margo
Started from new aliquots of primers, 1:10 dilution of primer stock in MilliQ H2O. Changes are bolded.
Reactions: HybB F+R, OmpA F+R, AOX1A F&R, and AOX1B F&R.
New PCR protocol:
26.5 uL H2O
10 uL TaQ 5X Reaction buffer
5 uL forward primer
5 uL reverse primer
1 uL dNTP 10 mM - (thawed & kept on ice)
2 uL template DNA
0.5 uL polymerase enzyme, TaQ
Total Volume= 50 uL
NOTE: We multiplied the entire protocol by 2 to get 50 uL total volume for this attempt
We are reducing number of experiments at once (e.g. not all setups at once, just a few) - HybB, OmpA, AOX1A F&R, and AOX1B F&R.
We are preparing two strips for PCR using this recipe and setup. We are then running them side-by-side in the PCR machine, one strip using the old cycle program, and one strip with two key modifications (suggested by Megan). We increased number of PCR cycles from 29 to 34 cycles, and reduced annealing temperature to 52 degrees. (If we go to low with the annealing temperature, we will be able to tell because we will see lots of bands on PCR.)
Making gel for PCR
1. Add 0.35g agarose to 35mL autoclaved water.
2. Add 3.5mL 1X TBE
3. Heat in microwave until agarose dissolves. Allow to cool. Make sure there are NO VAPORS before adding EtBr. EtBr is an intercalator. Don’t vaporize it, especially near your face!
4. Add 38.5սL EtBr (edited from 45 uL, make 1000X)
5. Pour gel and allow to harden.
Goals: Purify the PCR reactions and look at them on a gel
See protocols page for PCR purification
note: unless we want to keep the DNA for future use (unless we NEED pure DNA), the purification step is not necessary. We could have just run the DNA without the purification step... EtBr is an intercalator that will only bind the DNA anyway.
(Pics from 9/11 and 9/13 were taped to the lab bench for group reference -- maybe get Megan and/or Richard to help us interpret.)
Starter cultures for cryostocks
Made starter cultures (3uL CARB + 3mL LB + cells) from triple smear plates (9/10/2010), and put in the incubator for 24 hours.. Tomorrow (on 9/14/2010), make cryostocks from these starter cultures. Labelled according to insert.
9/14/2010
Results from 9/13/2010: The previous gel had fairly good AOX bands but after consulting with Richard we decided that the other samples weren’t represented in the gel. Further, we should have seen primer bands near the end, so in future gels it’s important not to let samples run off.
Miniprep
In order to prepare for another gel, a miniprep of the following samples from the starter cultures made on 9/13/2010 were run:
1. PSB1A3
2. AOX1a
3. ompA
4. hybB
5. AOX1b
The contents were labeled and stored in the -20 freezer for further use in the gel.
Crystocks
Cryostocks were made from starter cultures grown on 9/13/2010. Two distinct colonies were taken from each plate - so there are duplicates of each. Stored in the -80C labelled:
9-14 clg HybB (2)
9-14 clg ompA (2)
9-14 clg AOX1a (2)
9-14 clg AOX1b (2)
9-14 clg psb1A3 (2) [note: 1 of these starter cultures turned red, the other did not.]
9/15/2010
Goals: Perform PCR on the new minipreps from 9/14/2010 (using new 1:10 aliquots of primers from 9/13/2010)
PCR Protocol
26.5 uL H2O
10 uL TaQ 5X Reaction buffer
5 uL forward primer
5 uL reverse primer
1 uL dNTP 10 mM - (thawed & kept on ice)
2 uL template DNA
0.5 uL polymerase enzyme, TaQ
Total Volume= 50 uL
Notes: Wear gloves while doing the reaction. Keep all reagents on ice, including the PCR reactions. Add in the order of the protocol- get out the enzyme and place on ice right before you are about to use.
Reactions Done in PCR:
- HyBb F,R
- OmpA F,R
- Aox1a F,R
- Aox1a F,R2
- Aox1b F,R
- Aox1b F,R2
Notes: We are using a master mix of Water, TAQ Buffer, DNTPS, and TAQ. Add this to all the tubes (everything on ice), then add all the DNA reagents.
Results from nanospec:
Sample Concentration (ng/uL)
hybB 155.2
ompA 70.2
Aox1a 241.3
Aox1b 253.2
psb1A3 53.6
Making gel for PCR
1. Add 0.35g agarose to 36 mL 1 x TBEautoclaved water.
2. Heat in microwave until agarose dissolves. Allow to cool. Make sure there are NO VAPORS before adding EtBr. EtBr is an intercalator. Don’t vaporize it, especially near your face!
3. Add 35 սL EtBr (edited from 45 uL, make 1000X)
4. Pour gel and allow to harden.
9/16/2010
Goals:
- Interpret gel results of the PCR from 9/15/2010
- Perform PCR (from 9/15/2010) again, this time with:
- PHUSION Polymerase/Buffer
- RFP
What we did:
(Christina, Rob)
- Performed PCR with Phusion
- Reactions:
- HyBb F,R
- OmpA F,R
- Aox1a F,R
- Aox1a F,R2
- Aox1b F,R
- Aox1b F,R2
- RFP F,R
- RFP F2,R
- Performed miniprep of pSB1A3 from cell culture grown on 9/15/2010 (non-red)
PCR Protocol
26.5 uL H2O
10 uL PHUSION 5X Reaction buffer
5 uL forward primer
5 uL reverse primer
1 uL dNTP 10 mM - (thawed & kept on ice)
2 uL template DNA
0.5 uL polymerase enzyme, PHUSION
Total Volume= 50 uL
Miniprep of pSB1A3
1. Remove inoculation tubes from inoculation (37C shaker).
2. Obtain P1 buffer from 4C refrigerator.
3. Take centrifuge tubes and add 1.5mL of inoculated cells.
4. Centrifuge at 3000 rpm (low) for 1-2 min.
5. Spin until white pellet of cells forms at the bottom and liquid is more clear.
6. Take off supernatant and discard.
7. Repeat steps 4-6.
8. Resuspend pelleted bacterial cells in 250սL P1 buffer.
9. Add 250սL P2 buffer and invert 4-6 times (DO NOT VORTEX - doing so will shear DNA!)
10. Add 350սL buffer N3 and immediately invert 4-6 times.
11. Centrifuge for 10 min. at 13,000 rpm.
12. Take supernatant and add to spin columns.
13. Spin 30-60 sec. and discard flow through.
14. Wash column with 750սL buffer PE and centrifuge 1 min.
15. Discard flow through and centrifuge and additional minute.
16. Please column into a clean 1.5mL microcentrifuge tube.
17. Elute DNA by adding 30սL dH2O.
18. Let stand for 1 min., then centrifuge for 1 min.
Cryostock of hybB cells and pSB1A3 (from cultures on 9/15/2010)
900 uL of cells
100 uL DMSO
Total 1 mL
Mix, place in -80c Freezer
For next time
- Confirm all the predicted sizes match up with the observed sizes on the gel of the PCR from 9/15/2010
- If all are confirmed (Christina has confirmed, Christian and Scott confirmed hybb, ompa), then proceed with PCR purifications of 40 uL of each reaction, then RE digests, then ligations to construct each construct
9/17/2010
Goals:
Since the PCR was run on 9/16 using Phusion (high fidelity), we need to:
A) Run gel (2 uL each)
B) PCR purify (leftovers from the 50 uL stock= 48 uL)
C) Nanospec
D) Digest with restriction enzymes (runs overnight)
Protocols
Make a gel for running PCR products from 9/16/2010 to make sure the PCR was successful.
Making gel for PCR (1% agarose gels):
Added 180 mL 1x TBE and 1.8g agarose
Heated up until agarose was no longer visible
Let cool (approx. 10 min) until there are NO MORE VAPORS
Added 180 սL Ethidium bromide (1000X)
Pour into gels and allow to harden (large wells hold about 35 mL).
Note: it is ok to make 6 gels at once according to the recipe above and store them. It is not necessary to “immediately” use gels as long as they are stored properly. From now on, when you make 1% gels, just fill all 6 wells at once.
Gel of the PCR from 9/16/2010 was run today and imaged:
Lane order: 100 bp ladder|aox1aFR|aox1aFR2|aox1bFR|apx1bFR2|HybB FR|ompa FR|RFP FR| RFP F2R|100 bp ladder
volumes:
loaded 4 ul of the aox reactions, 7 ul of ompa and hybB, and 5 ul of the RFP reactions
See protocols page for PCR purification
Nanospec results (PCR from 9/16/2010)
AOX1a-F,R = 99.3 ng/uL
AOX1a-F,R2 = 50.0 ng/uL
AOX1b-F,R = 48.5 ng/uL
AOX1b-F,R2 = 42.1 ng/uL
OmpA-F,R = 27.3 ng/uL
RFP-F2,R = 10.8 ng/uL
Hyb-F,R = 26.2 ng/uL
RFP-F,R = 8.8 ng/uL
Restriction Enzyme Digest General Process
- check buffers (NEB site)
-check if BSA required (NEB site)
- Start w/ HybB and RFP (start @ step A) / pBS1A3 (start @ step D)
Recipe for : 50 uL RXN
DNA (1-2 ug- based on nanospec results)
1 uL each enzyme
5 uL 10X buffer
1 uL BSA(if needed)
Today we are digesting just the HybB-F,R and RFP-F,R in order to do the ligation on this simple construct. The rest of the PCR-ed, purified, and nanoscpec’ed building blocks went into the freezer for later use.
RE Digest Recipe for HybB
40 uL HybB-F,R (based on the nanospec results above)
1 uL EcoRI
1 uL NotI
4.7 uL 10X buffer for EcoRI [Edit 9/17/2010. Only EcoRIbuffer)
1 uL 10x BSA (based on this specfic RE mix-- BSA is required)
Place into an eppe tube, pipet gently to mix. Incubate at 37 degrees in water bath overnight.
RE Digest Recipe for RFP-F,Rr
40 uL RFP-F,R (based on the nanospec results above) [Edit 9/17/2010, 110 ul not there, reduced to 40]
1 uL SpeI (edited changed from notI to speI )
1 uL NotI
5 uL 10X buffer for EcoRI [Edit, only EcoRI buffer]
1 uL10x BSA (based on this specfic RE mix-- BSA is required)
Place into an eppendorf tube, pipette gently to mix. Incubate at 37 degrees in water bath overnight.
Results
Gel of multiple PCR reactions
100 bp Ladder| Aox1a FR| Aox1a FR2| Aox1b FR| Aox1b FR2| HybB FR| Ompa FR| RFP FR| RFP F2R| 100 bp ladder|
For Future
- We have a strategy for each construct, written on the board. We must digest each PCR product to build our building blocks, then construct each construct through a series of ligations, digest, PCRs etc (See 9.18.2010 for strategy)
9/18/2010
Goals
- PCR purify the hybB F,R and RFP F,R (rxns from 9/16/2010)
Notes:
- RFP F,R was accidently digested with NotI and not SpeI.
- What to do? We will need to add 1 uL of SpeI and run overnight, so that the SpeI site is cleaved.
Just in case we need this RFP, we PCR-purified it today and stored in freezer, clearly labeled PARTLY DIGESTED RFP. If we need to use this RFP, it will need to be digested by SpeI. - RFP band on the gel pic from 9/17/2010 was faint and nanospec showed low conc (8.8 ng /uL) versus the higher yields of the other rxns.
Ran PCR purification on HybB, stored in freezer. This HybB was nanospec’ed on Friday and had a concentration of 26.2 ng/uL. This has been digested by the right RE’s, EcoRI and NotI, and ready to be ligated with RFP when it has been appropriately digested.
See protocols page for PCR purification
BASIC PLAN FOR BUILDING PLASMID CONSTRUCTS
from the primered building blocks, which are stored in our freezer
A) RUN GEL - 2 uL each - to check size - this step completed for all building blocks
B) PCR PURIFY leftovers - this step completed for all building blocks
C) NANOSPEC - record concentrations - this step completed for all building blocks
D) DIGEST with restriction enzymes, overnight
E) PCR PURIFY digestion products
F) LIGATION of gene building blocks - we are starting with HybB & RFP
G) PCR ligation products, HybB-RFP
H) DIGEST products, HybB-RFP
I) RUN GEL on small amount of digestion products, HybB-RFP
J) PCR PURIFY the rest of the digestion products, HybB-RFP
K) DIGEST the vector - we are using pBS1A3
L) PCR PURIFY the vector
M) LIGATION of gene with vector, HybB-RFP and pBS1A3
N) TRANSFORMATION of plasmid into E. coli, run overnight
Note- Do a nanospec after PCR purifications
NOTES:
- Steps in BOLD are going to be repeated with each plasmid construct. Steps A,B, and C have already been done for each building block and won’t be repeated unless there is a specific issue with a particular building block.
- Steps K and L do not necessarily need to wait until step J is completed to be run. They are listed this way so there is no confusion about what is being digested or PCR purified at each step.
