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Transformatie van plasmide DNA in E. coli Met behulp van de heat shock-methode

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Department of Physiology and Biophysics, University of California, Irvine (UCI)

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Cite this Article: Transformatie van plasmide DNA in E. coli Met behulp van de heat shock-methode

Froger, A., Hall, J. E. Transformation of Plasmid DNA into E. coli Using the Heat Shock Method. J. Vis. Exp. (6), e253, doi:10.3791/253 (2007).

Abstract: Transformatie van plasmide DNA in E. coli Met behulp van de heat shock-methode

Transformatie van plasmide DNA in E. coli met behulp van de heat shock-methode is een basistechniek van de moleculaire biologie. Het bestaat uit het plaatsen van een buitenlandse plasmide of ligatieproduct in bacteriën. Deze video protocol beschrijft de traditionele methode van transformatie met behulp van commercieel verkrijgbare chemisch bevoegde bacteriën van Genlantis. Na een korte incubatie in ijs, is een mengsel van chemisch bevoegde bacteriën en DNA geplaatst bij 42 ° C gedurende 45 seconden (heat shock) en dan weer terug geplaatst in ijs. SOC media is toegevoegd en de getransformeerde cellen worden geïncubeerd bij 37 ° C gedurende 30 min met agitatie. Worden verzekerd van het isoleren van kolonies onafhankelijk van transformatie-efficiëntie, zijn twee grootheden van de getransformeerde bacteriën verguld. Deze traditionele protocol met succes kan worden gebruikt om de meeste commercieel beschikbare bevoegde bacteriën te transformeren. De turbocells van Genlantis kan ook gebruikt worden in een nieuwe 3-minuten transformatie protocol, beschreven in de handleiding.

Disclosures: Transformatie van plasmide DNA in E. coli Met behulp van de heat shock-methode

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9 Comments

I have never seen or heard anyone use beads to create a spread plate. Is that a new technique that has not reached my university yet, or is it an outdated technique that scientists don't use anymore?

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Posted by: AnonymousFebruary 1, 2008, 7:57 PM

hi my neam isalirezababazade . iam student in unversity tehran . what do you teransfer factors F(negativ)in the e.coli?why transfe geneboth factor?

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Posted by: aliDecember 24, 2008, 9:41 AM

People use it all the time. Ask in the labs around, I am sure you will find people who use it.

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Posted by: AnonymousFebruary 1, 2008, 8:11 PM

I haven't seen it either so you're not alone.

I'm wondering if it isn't easily to use a spreader in terms of cleanup and reducing contamination? 

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Posted by: AnonymousMarch 9, 2008, 8:45 PM

Copacabana method for spreading E. coli and yeast colonies
Mark T. Worthington, Roger Qi Luo, and Jared Pelo
BioTechniques Vol. 30, No. 4: pp 738-741 (Apr 2001)

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Posted by: ozgur g.September 9, 2008, 9:04 PM

chemical dna transformation and plasmid curing of E.coli

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Posted by: ali sabahJanuary 11, 2012, 11:49 PM

why don't the flame is open? Don't you consider the contamination risk, or do you think that it is not necessary??

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Posted by: zerrinSeptember 9, 2008, 4:22 PM

Please look more carefully. The bunsen burner is clearly on and the blue flame is clearly visible in the video. It is on at all stages which are succeptible to contamination.   

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Posted by: labSeptember 16, 2008, 8:57 PM

That was indeed a great thing for the beginners in this field. Good job!

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Posted by: kamal prajapatiOctober 22, 2008, 8:11 PM

double stranded plasmid can be fntered into host

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Posted by: khemJune 10, 2010, 6:00 AM

Beads are used as well as scoops, i prefare scoops because i can be sure that everything is spread nice and equal. some technician use beads, you need to do the right motion to make it work :D

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Posted by: MuadJanuary 25, 2012, 3:59 AM

Why we are keep the mixture of competent cells and plasmid DNA at 42c for 45 minutes?

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Posted by: NagarjunaFebruary 22, 2012, 8:56 AM

45 seconds not minutes XD
Useful, more protocols should be explain like this one
thaks

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Posted by: AdrianApril 12, 2012, 7:48 PM

Where is gloves to prevent contamination?????

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Posted by: OHIONET O.May 10, 2012, 4:35 PM

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