Team:BostonU/MoClo2

From 2012.igem.org

(Difference between revisions)

Revision as of 19:27, 18 August 2012

BostonU iGEM Team: Welcome

MoClo

An Introduction to MoClo

Modular Cloning, or MoClo, is a relatively new assembly method introduced in 2011 by Ernst Weber et al., whereby using Type IIS restriction sites allows the user to ligate up to six DNA parts together in a one-pot reaction. It is a method based on . Type IIS restriction enzymes cleave outside of their recognition site to one side, thus allowing for removal of those restriction sites when used properly. This helps eliminate excess base pairs, or scars, from forming between DNA Parts. However, in order to ligate together properly, MoClo utilizes a set of 4-bp fusion sites, which remain behind after ligation and thus generate 4-bp scars between DNA parts in the final DNA sequence following ligation of two or more parts.

Modules

The MoClo system has three levels of assembly.

Level 0: Basic DNA Parts (ex: promoter, gene, etc.) are PCR amplified and then cloned into MoClo destination vectors to form Level 0 Modules. The DNA parts within these Level 0 Modules are flanked by BsaI sites and two different 4pb-fusion sites.

Level 1: Up to six Level 0 parts are ligated together to form Level 1 Modules. In our lab, Level 1 Modules most often result in complete transcriptional units (ex: promoter-RBS-gene-terminator). Level 1 Modules are flanked by BpiI sites and two different 4pb-fusion sites.

Level 2: Up to six Level 1 Modules are ligated together to form Level 2 Modules. More complex circuits, such as an inverter or NOR gate, can be built using Level 2 Modules. Like Level 0 Modules, Level 2 Modules are flanked by BsaI sites and two different 4pb-fusion sites.

@@ Line 163: / Line 163: @@
 <ul>
 <h7>
-<p dir="ltr">MoClo is a relatively new assembly method introduced in 2011 by Ernst Weber et al., whereby using Type IIS restriction sites allows the user to ligate up to six DNA parts together in a one-pot reaction. Type IIs restriction enzymes cleave outside of their recognition site to one side, thus allowing for removal of those restriction sites when used properly. This helps eliminate excess base pairs, or scars, from forming between DNA Parts. However, in order to ligate together properly, MoClo utilizes a set of 4-bp fusion sites, which remain behind after ligation and thus generate 4-bp scars between DNA parts in the final DNA sequence following ligation of two or more parts.
+<p dir="ltr"><a href="http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0016765#pone.0016765-Engler1"<>Modular Cloning</a>, or MoClo, is a relatively new assembly method introduced in 2011 by Ernst Weber et al., whereby using Type IIS restriction sites allows the user to ligate up to six DNA parts together in a one-pot reaction. It is a method based on <a href="http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0005553"><Golden Gate Assembly</a>. Type IIS restriction enzymes cleave outside of their recognition site to one side, thus allowing for removal of those restriction sites when used properly. This helps eliminate excess base pairs, or scars, from forming between DNA Parts. However, in order to ligate together properly, MoClo utilizes a set of 4-bp fusion sites, which remain behind after ligation and thus generate 4-bp scars between DNA parts in the final DNA sequence following ligation of two or more parts.
 <br><br>